./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.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 cdf629ba70521b99830442583c87012a34d164ca28f01f7e59d76ae2f1e525ff --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:54:04,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:54:04,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:54:04,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:54:04,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:54:04,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:54:04,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:54:04,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:54:04,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:54:04,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:54:04,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:54:04,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:54:04,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:54:04,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:54:04,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:54:04,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:54:04,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:54:04,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:54:04,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:54:04,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:54:04,417 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:54:04,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:54:04,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:54:04,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:54:04,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:54:04,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:54:04,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:54:04,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:54:04,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:54:04,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:54:04,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:54:04,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:54:04,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:54:04,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:54:04,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:54:04,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:54:04,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:54:04,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:54:04,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:54:04,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:54:04,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:54:04,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:54:04,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:54:04,468 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:54:04,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:54:04,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:54:04,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:54:04,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:54:04,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:54:04,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:54:04,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:54:04,471 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:54:04,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:54:04,473 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:54:04,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:54:04,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:54:04,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:54:04,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:54:04,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:54:04,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:54:04,474 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:54:04,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:54:04,475 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:54:04,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:54:04,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:54:04,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:54:04,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:54:04,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:54:04,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:54:04,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:54:04,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:54:04,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:54:04,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:54:04,478 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:54:04,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:54:04,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:54:04,478 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdf629ba70521b99830442583c87012a34d164ca28f01f7e59d76ae2f1e525ff [2022-07-13 21:54:04,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:54:04,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:54:04,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:54:04,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:54:04,769 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:54:04,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i [2022-07-13 21:54:04,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5439063c9/2c935d3dc77e499aa5986edb6ecdb183/FLAG3923ccad3 [2022-07-13 21:54:05,258 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:54:05,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i [2022-07-13 21:54:05,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5439063c9/2c935d3dc77e499aa5986edb6ecdb183/FLAG3923ccad3 [2022-07-13 21:54:05,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5439063c9/2c935d3dc77e499aa5986edb6ecdb183 [2022-07-13 21:54:05,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:54:05,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:54:05,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:54:05,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:54:05,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:54:05,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:54:05" (1/1) ... [2022-07-13 21:54:05,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368983bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:05, skipping insertion in model container [2022-07-13 21:54:05,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:54:05" (1/1) ... [2022-07-13 21:54:05,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:54:05,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:54:05,886 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i[30035,30048] [2022-07-13 21:54:05,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:54:05,907 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:54:05,960 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-loop-bound-1.i[30035,30048] [2022-07-13 21:54:05,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:54:06,009 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:54:06,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06 WrapperNode [2022-07-13 21:54:06,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:54:06,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:54:06,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:54:06,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:54:06,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (1/1) ... [2022-07-13 21:54:06,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (1/1) ... [2022-07-13 21:54:06,066 INFO L137 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2022-07-13 21:54:06,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:54:06,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:54:06,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:54:06,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:54:06,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (1/1) ... [2022-07-13 21:54:06,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (1/1) ... [2022-07-13 21:54:06,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (1/1) ... [2022-07-13 21:54:06,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (1/1) ... [2022-07-13 21:54:06,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (1/1) ... [2022-07-13 21:54:06,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (1/1) ... [2022-07-13 21:54:06,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (1/1) ... [2022-07-13 21:54:06,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:54:06,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:54:06,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:54:06,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:54:06,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (1/1) ... [2022-07-13 21:54:06,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:54:06,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:54:06,143 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) [2022-07-13 21:54:06,165 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 [2022-07-13 21:54:06,178 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-13 21:54:06,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-13 21:54:06,182 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-13 21:54:06,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-13 21:54:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:54:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:54:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:54:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:54:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:54:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:54:06,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:54:06,184 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:54:06,269 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:54:06,271 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:54:06,389 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:54:06,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:54:06,395 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 21:54:06,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:54:06 BoogieIcfgContainer [2022-07-13 21:54:06,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:54:06,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:54:06,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:54:06,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:54:06,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:54:05" (1/3) ... [2022-07-13 21:54:06,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9853ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:54:06, skipping insertion in model container [2022-07-13 21:54:06,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:54:06" (2/3) ... [2022-07-13 21:54:06,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9853ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:54:06, skipping insertion in model container [2022-07-13 21:54:06,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:54:06" (3/3) ... [2022-07-13 21:54:06,404 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-loop-bound-1.i [2022-07-13 21:54:06,408 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:54:06,415 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:54:06,416 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:54:06,416 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:54:06,489 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:54:06,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 80 places, 77 transitions, 164 flow [2022-07-13 21:54:06,555 INFO L129 PetriNetUnfolder]: 4/90 cut-off events. [2022-07-13 21:54:06,555 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:54:06,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 90 events. 4/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2022-07-13 21:54:06,559 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 77 transitions, 164 flow [2022-07-13 21:54:06,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 160 flow [2022-07-13 21:54:06,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:54:06,578 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@6afe97f6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@129c1e68 [2022-07-13 21:54:06,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 21:54:06,595 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2022-07-13 21:54:06,598 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:54:06,599 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:06,600 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] [2022-07-13 21:54:06,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:54:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash 25235032, now seen corresponding path program 1 times [2022-07-13 21:54:06,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:06,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802285482] [2022-07-13 21:54:06,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:06,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:07,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:07,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802285482] [2022-07-13 21:54:07,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802285482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:07,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:07,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:54:07,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829030034] [2022-07-13 21:54:07,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:07,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:54:07,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:07,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:54:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:54:07,111 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-13 21:54:07,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 54.625) internal successors, (437), 8 states have internal predecessors, (437), 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) [2022-07-13 21:54:07,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:07,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-13 21:54:07,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:07,377 INFO L129 PetriNetUnfolder]: 71/256 cut-off events. [2022-07-13 21:54:07,377 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:54:07,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 256 events. 71/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1313 event pairs, 2 based on Foata normal form. 4/229 useless extension candidates. Maximal degree in co-relation 378. Up to 38 conditions per place. [2022-07-13 21:54:07,381 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 28 selfloop transitions, 11 changer transitions 6/97 dead transitions. [2022-07-13 21:54:07,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 97 transitions, 298 flow [2022-07-13 21:54:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:54:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:54:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 639 transitions. [2022-07-13 21:54:07,395 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7544273907910272 [2022-07-13 21:54:07,396 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 639 transitions. [2022-07-13 21:54:07,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 639 transitions. [2022-07-13 21:54:07,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:07,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 639 transitions. [2022-07-13 21:54:07,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.09090909090909) internal successors, (639), 11 states have internal predecessors, (639), 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) [2022-07-13 21:54:07,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 77.0) internal successors, (924), 12 states have internal predecessors, (924), 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) [2022-07-13 21:54:07,414 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 77.0) internal successors, (924), 12 states have internal predecessors, (924), 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) [2022-07-13 21:54:07,416 INFO L186 Difference]: Start difference. First operand has 79 places, 76 transitions, 160 flow. Second operand 11 states and 639 transitions. [2022-07-13 21:54:07,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 97 transitions, 298 flow [2022-07-13 21:54:07,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 97 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:54:07,422 INFO L242 Difference]: Finished difference. Result has 91 places, 77 transitions, 203 flow [2022-07-13 21:54:07,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=203, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2022-07-13 21:54:07,427 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2022-07-13 21:54:07,427 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 203 flow [2022-07-13 21:54:07,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 54.625) internal successors, (437), 8 states have internal predecessors, (437), 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) [2022-07-13 21:54:07,427 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:07,428 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:07,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:54:07,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 21:54:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:07,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1080909318, now seen corresponding path program 1 times [2022-07-13 21:54:07,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:07,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473815685] [2022-07-13 21:54:07,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:07,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:54:07,458 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:54:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:54:07,504 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:54:07,504 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:54:07,507 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-13 21:54:07,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-13 21:54:07,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-13 21:54:07,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-13 21:54:07,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:54:07,511 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:54:07,517 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:54:07,517 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:54:07,541 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:54:07,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 102 places, 96 transitions, 216 flow [2022-07-13 21:54:07,569 INFO L129 PetriNetUnfolder]: 5/115 cut-off events. [2022-07-13 21:54:07,570 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:54:07,571 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 115 events. 5/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 124. Up to 6 conditions per place. [2022-07-13 21:54:07,571 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 96 transitions, 216 flow [2022-07-13 21:54:07,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 82 transitions, 179 flow [2022-07-13 21:54:07,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:54:07,588 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@6afe97f6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@129c1e68 [2022-07-13 21:54:07,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:54:07,596 INFO L129 PetriNetUnfolder]: 3/55 cut-off events. [2022-07-13 21:54:07,596 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:54:07,596 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:07,596 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] [2022-07-13 21:54:07,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:54:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:07,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1995614165, now seen corresponding path program 1 times [2022-07-13 21:54:07,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:07,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434694334] [2022-07-13 21:54:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:07,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:07,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434694334] [2022-07-13 21:54:07,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434694334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:07,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:07,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:54:07,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417004903] [2022-07-13 21:54:07,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:07,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:54:07,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:07,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:54:07,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:54:07,819 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 96 [2022-07-13 21:54:07,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 179 flow. Second operand has 8 states, 8 states have (on average 66.625) internal successors, (533), 8 states have internal predecessors, (533), 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) [2022-07-13 21:54:07,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:07,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 96 [2022-07-13 21:54:07,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:08,134 INFO L129 PetriNetUnfolder]: 429/995 cut-off events. [2022-07-13 21:54:08,134 INFO L130 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-07-13 21:54:08,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 995 events. 429/995 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6972 event pairs, 24 based on Foata normal form. 19/894 useless extension candidates. Maximal degree in co-relation 1746. Up to 213 conditions per place. [2022-07-13 21:54:08,145 INFO L132 encePairwiseOnDemand]: 83/96 looper letters, 54 selfloop transitions, 14 changer transitions 6/129 dead transitions. [2022-07-13 21:54:08,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 129 transitions, 457 flow [2022-07-13 21:54:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:54:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:54:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 800 transitions. [2022-07-13 21:54:08,153 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2022-07-13 21:54:08,153 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 800 transitions. [2022-07-13 21:54:08,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 800 transitions. [2022-07-13 21:54:08,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:08,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 800 transitions. [2022-07-13 21:54:08,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 72.72727272727273) internal successors, (800), 11 states have internal predecessors, (800), 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) [2022-07-13 21:54:08,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 96.0) internal successors, (1152), 12 states have internal predecessors, (1152), 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) [2022-07-13 21:54:08,160 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 96.0) internal successors, (1152), 12 states have internal predecessors, (1152), 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) [2022-07-13 21:54:08,160 INFO L186 Difference]: Start difference. First operand has 87 places, 82 transitions, 179 flow. Second operand 11 states and 800 transitions. [2022-07-13 21:54:08,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 129 transitions, 457 flow [2022-07-13 21:54:08,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 454 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-13 21:54:08,166 INFO L242 Difference]: Finished difference. Result has 100 places, 87 transitions, 254 flow [2022-07-13 21:54:08,166 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=254, PETRI_PLACES=100, PETRI_TRANSITIONS=87} [2022-07-13 21:54:08,167 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 13 predicate places. [2022-07-13 21:54:08,167 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 87 transitions, 254 flow [2022-07-13 21:54:08,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.625) internal successors, (533), 8 states have internal predecessors, (533), 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) [2022-07-13 21:54:08,168 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:08,168 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] [2022-07-13 21:54:08,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:54:08,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:54:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:08,170 INFO L85 PathProgramCache]: Analyzing trace with hash -120525765, now seen corresponding path program 1 times [2022-07-13 21:54:08,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:08,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960453048] [2022-07-13 21:54:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:08,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:08,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:08,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960453048] [2022-07-13 21:54:08,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960453048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:08,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:08,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-13 21:54:08,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705508605] [2022-07-13 21:54:08,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:08,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:54:08,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:08,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:54:08,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:54:08,357 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 96 [2022-07-13 21:54:08,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 87 transitions, 254 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 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) [2022-07-13 21:54:08,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:08,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 96 [2022-07-13 21:54:08,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:08,868 INFO L129 PetriNetUnfolder]: 643/1483 cut-off events. [2022-07-13 21:54:08,868 INFO L130 PetriNetUnfolder]: For 804/804 co-relation queries the response was YES. [2022-07-13 21:54:08,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3529 conditions, 1483 events. 643/1483 cut-off events. For 804/804 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 11891 event pairs, 36 based on Foata normal form. 15/1333 useless extension candidates. Maximal degree in co-relation 3471. Up to 166 conditions per place. [2022-07-13 21:54:08,881 INFO L132 encePairwiseOnDemand]: 85/96 looper letters, 87 selfloop transitions, 36 changer transitions 13/190 dead transitions. [2022-07-13 21:54:08,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 190 transitions, 897 flow [2022-07-13 21:54:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 21:54:08,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-13 21:54:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1542 transitions. [2022-07-13 21:54:08,886 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7301136363636364 [2022-07-13 21:54:08,886 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1542 transitions. [2022-07-13 21:54:08,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1542 transitions. [2022-07-13 21:54:08,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:08,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1542 transitions. [2022-07-13 21:54:08,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 70.0909090909091) internal successors, (1542), 22 states have internal predecessors, (1542), 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) [2022-07-13 21:54:08,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 96.0) internal successors, (2208), 23 states have internal predecessors, (2208), 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) [2022-07-13 21:54:08,897 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 96.0) internal successors, (2208), 23 states have internal predecessors, (2208), 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) [2022-07-13 21:54:08,897 INFO L186 Difference]: Start difference. First operand has 100 places, 87 transitions, 254 flow. Second operand 22 states and 1542 transitions. [2022-07-13 21:54:08,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 190 transitions, 897 flow [2022-07-13 21:54:08,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 190 transitions, 891 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 21:54:08,943 INFO L242 Difference]: Finished difference. Result has 127 places, 110 transitions, 516 flow [2022-07-13 21:54:08,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=516, PETRI_PLACES=127, PETRI_TRANSITIONS=110} [2022-07-13 21:54:08,945 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 40 predicate places. [2022-07-13 21:54:08,945 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 110 transitions, 516 flow [2022-07-13 21:54:08,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 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) [2022-07-13 21:54:08,946 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:08,946 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, 1, 1, 1, 1] [2022-07-13 21:54:08,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:54:08,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:54:08,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:08,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1541547493, now seen corresponding path program 1 times [2022-07-13 21:54:08,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:08,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777039491] [2022-07-13 21:54:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:08,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:54:08,991 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:54:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:54:09,031 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:54:09,031 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:54:09,032 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-13 21:54:09,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-13 21:54:09,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-13 21:54:09,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-13 21:54:09,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-13 21:54:09,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:54:09,033 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 21:54:09,033 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:54:09,033 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:54:09,050 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:54:09,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 124 places, 115 transitions, 272 flow [2022-07-13 21:54:09,062 INFO L129 PetriNetUnfolder]: 6/140 cut-off events. [2022-07-13 21:54:09,063 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:54:09,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 140 events. 6/140 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2022-07-13 21:54:09,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 115 transitions, 272 flow [2022-07-13 21:54:09,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 88 transitions, 200 flow [2022-07-13 21:54:09,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:54:09,066 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@6afe97f6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@129c1e68 [2022-07-13 21:54:09,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-13 21:54:09,070 INFO L129 PetriNetUnfolder]: 3/57 cut-off events. [2022-07-13 21:54:09,070 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:54:09,070 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:09,070 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] [2022-07-13 21:54:09,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:54:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1038200074, now seen corresponding path program 1 times [2022-07-13 21:54:09,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:09,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537027041] [2022-07-13 21:54:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:09,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:09,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:09,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537027041] [2022-07-13 21:54:09,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537027041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:09,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:09,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:54:09,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223219941] [2022-07-13 21:54:09,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:09,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:54:09,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:09,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:54:09,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:54:09,166 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 115 [2022-07-13 21:54:09,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 78.625) internal successors, (629), 8 states have internal predecessors, (629), 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) [2022-07-13 21:54:09,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:09,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 115 [2022-07-13 21:54:09,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:09,682 INFO L129 PetriNetUnfolder]: 2081/3929 cut-off events. [2022-07-13 21:54:09,682 INFO L130 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2022-07-13 21:54:09,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7355 conditions, 3929 events. 2081/3929 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31212 event pairs, 169 based on Foata normal form. 76/3586 useless extension candidates. Maximal degree in co-relation 7303. Up to 1142 conditions per place. [2022-07-13 21:54:09,734 INFO L132 encePairwiseOnDemand]: 101/115 looper letters, 72 selfloop transitions, 17 changer transitions 6/153 dead transitions. [2022-07-13 21:54:09,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 153 transitions, 598 flow [2022-07-13 21:54:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:54:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:54:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 953 transitions. [2022-07-13 21:54:09,737 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7533596837944664 [2022-07-13 21:54:09,737 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 953 transitions. [2022-07-13 21:54:09,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 953 transitions. [2022-07-13 21:54:09,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:09,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 953 transitions. [2022-07-13 21:54:09,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 86.63636363636364) internal successors, (953), 11 states have internal predecessors, (953), 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) [2022-07-13 21:54:09,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 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) [2022-07-13 21:54:09,743 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 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) [2022-07-13 21:54:09,744 INFO L186 Difference]: Start difference. First operand has 95 places, 88 transitions, 200 flow. Second operand 11 states and 953 transitions. [2022-07-13 21:54:09,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 153 transitions, 598 flow [2022-07-13 21:54:09,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 579 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-13 21:54:09,748 INFO L242 Difference]: Finished difference. Result has 108 places, 96 transitions, 294 flow [2022-07-13 21:54:09,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=294, PETRI_PLACES=108, PETRI_TRANSITIONS=96} [2022-07-13 21:54:09,749 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 13 predicate places. [2022-07-13 21:54:09,749 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 96 transitions, 294 flow [2022-07-13 21:54:09,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 78.625) internal successors, (629), 8 states have internal predecessors, (629), 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) [2022-07-13 21:54:09,750 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:09,750 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] [2022-07-13 21:54:09,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:54:09,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:54:09,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash -777511255, now seen corresponding path program 1 times [2022-07-13 21:54:09,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:09,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533534448] [2022-07-13 21:54:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:09,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:09,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:09,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533534448] [2022-07-13 21:54:09,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533534448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:09,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:09,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-13 21:54:09,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111714759] [2022-07-13 21:54:09,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:09,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:54:09,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:09,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:54:09,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-13 21:54:09,964 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 115 [2022-07-13 21:54:09,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 96 transitions, 294 flow. Second operand has 13 states, 13 states have (on average 72.61538461538461) internal successors, (944), 13 states have internal predecessors, (944), 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) [2022-07-13 21:54:09,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:09,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 115 [2022-07-13 21:54:09,965 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:12,652 INFO L129 PetriNetUnfolder]: 9650/19953 cut-off events. [2022-07-13 21:54:12,653 INFO L130 PetriNetUnfolder]: For 13089/13089 co-relation queries the response was YES. [2022-07-13 21:54:12,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47112 conditions, 19953 events. 9650/19953 cut-off events. For 13089/13089 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 191604 event pairs, 1386 based on Foata normal form. 95/19103 useless extension candidates. Maximal degree in co-relation 47051. Up to 3081 conditions per place. [2022-07-13 21:54:12,845 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 234 selfloop transitions, 100 changer transitions 17/403 dead transitions. [2022-07-13 21:54:12,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 403 transitions, 2175 flow [2022-07-13 21:54:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 21:54:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-13 21:54:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2887 transitions. [2022-07-13 21:54:12,902 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6973429951690822 [2022-07-13 21:54:12,902 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2887 transitions. [2022-07-13 21:54:12,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2887 transitions. [2022-07-13 21:54:12,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:12,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2887 transitions. [2022-07-13 21:54:12,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 80.19444444444444) internal successors, (2887), 36 states have internal predecessors, (2887), 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) [2022-07-13 21:54:12,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 115.0) internal successors, (4255), 37 states have internal predecessors, (4255), 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) [2022-07-13 21:54:12,919 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 115.0) internal successors, (4255), 37 states have internal predecessors, (4255), 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) [2022-07-13 21:54:12,919 INFO L186 Difference]: Start difference. First operand has 108 places, 96 transitions, 294 flow. Second operand 36 states and 2887 transitions. [2022-07-13 21:54:12,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 403 transitions, 2175 flow [2022-07-13 21:54:13,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 403 transitions, 2169 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 21:54:13,073 INFO L242 Difference]: Finished difference. Result has 160 places, 191 transitions, 1164 flow [2022-07-13 21:54:13,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1164, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2022-07-13 21:54:13,075 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 65 predicate places. [2022-07-13 21:54:13,075 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 1164 flow [2022-07-13 21:54:13,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.61538461538461) internal successors, (944), 13 states have internal predecessors, (944), 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) [2022-07-13 21:54:13,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:13,076 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:13,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:54:13,076 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:54:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:13,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1930678775, now seen corresponding path program 1 times [2022-07-13 21:54:13,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:13,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118321244] [2022-07-13 21:54:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:13,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:13,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:13,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118321244] [2022-07-13 21:54:13,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118321244] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:54:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404214096] [2022-07-13 21:54:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:13,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:54:13,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:54:13,215 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) [2022-07-13 21:54:13,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:54:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:13,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 21:54:13,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:54:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:13,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:54:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:13,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404214096] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:54:13,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:54:13,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-07-13 21:54:13,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42465987] [2022-07-13 21:54:13,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:54:13,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 21:54:13,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:13,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 21:54:13,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:54:13,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 115 [2022-07-13 21:54:13,693 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 1164 flow. Second operand has 25 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 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) [2022-07-13 21:54:13,693 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:13,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 115 [2022-07-13 21:54:13,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:20,219 INFO L129 PetriNetUnfolder]: 19384/40113 cut-off events. [2022-07-13 21:54:20,219 INFO L130 PetriNetUnfolder]: For 192916/192918 co-relation queries the response was YES. [2022-07-13 21:54:20,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145112 conditions, 40113 events. 19384/40113 cut-off events. For 192916/192918 co-relation queries the response was YES. Maximal size of possible extension queue 2457. Compared 430209 event pairs, 3872 based on Foata normal form. 298/40346 useless extension candidates. Maximal degree in co-relation 145029. Up to 6733 conditions per place. [2022-07-13 21:54:20,697 INFO L132 encePairwiseOnDemand]: 100/115 looper letters, 475 selfloop transitions, 433 changer transitions 34/996 dead transitions. [2022-07-13 21:54:20,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 996 transitions, 9113 flow [2022-07-13 21:54:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-13 21:54:20,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-13 21:54:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6051 transitions. [2022-07-13 21:54:20,711 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7207861822513401 [2022-07-13 21:54:20,711 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6051 transitions. [2022-07-13 21:54:20,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6051 transitions. [2022-07-13 21:54:20,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:20,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6051 transitions. [2022-07-13 21:54:20,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 82.89041095890411) internal successors, (6051), 73 states have internal predecessors, (6051), 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) [2022-07-13 21:54:20,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 115.0) internal successors, (8510), 74 states have internal predecessors, (8510), 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) [2022-07-13 21:54:20,751 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 115.0) internal successors, (8510), 74 states have internal predecessors, (8510), 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) [2022-07-13 21:54:20,751 INFO L186 Difference]: Start difference. First operand has 160 places, 191 transitions, 1164 flow. Second operand 73 states and 6051 transitions. [2022-07-13 21:54:20,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 996 transitions, 9113 flow [2022-07-13 21:54:22,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 996 transitions, 8841 flow, removed 132 selfloop flow, removed 3 redundant places. [2022-07-13 21:54:22,439 INFO L242 Difference]: Finished difference. Result has 257 places, 607 transitions, 6378 flow [2022-07-13 21:54:22,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=6378, PETRI_PLACES=257, PETRI_TRANSITIONS=607} [2022-07-13 21:54:22,442 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 162 predicate places. [2022-07-13 21:54:22,442 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 607 transitions, 6378 flow [2022-07-13 21:54:22,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 76.16) internal successors, (1904), 25 states have internal predecessors, (1904), 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) [2022-07-13 21:54:22,443 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:22,444 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:22,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:54:22,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:54:22,662 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:54:22,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:22,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1845481669, now seen corresponding path program 1 times [2022-07-13 21:54:22,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:22,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477999233] [2022-07-13 21:54:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:22,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:22,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:22,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477999233] [2022-07-13 21:54:22,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477999233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:54:22,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314841337] [2022-07-13 21:54:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:22,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:54:22,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:54:22,844 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) [2022-07-13 21:54:22,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:54:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 21:54:22,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:54:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:23,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:54:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:23,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314841337] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:54:23,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:54:23,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-07-13 21:54:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203651970] [2022-07-13 21:54:23,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:54:23,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 21:54:23,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 21:54:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-07-13 21:54:23,523 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2022-07-13 21:54:23,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 607 transitions, 6378 flow. Second operand has 30 states, 30 states have (on average 77.06666666666666) internal successors, (2312), 30 states have internal predecessors, (2312), 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) [2022-07-13 21:54:23,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:23,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2022-07-13 21:54:23,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:33,042 INFO L129 PetriNetUnfolder]: 19587/40364 cut-off events. [2022-07-13 21:54:33,042 INFO L130 PetriNetUnfolder]: For 498979/501380 co-relation queries the response was YES. [2022-07-13 21:54:33,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202110 conditions, 40364 events. 19587/40364 cut-off events. For 498979/501380 co-relation queries the response was YES. Maximal size of possible extension queue 2560. Compared 441461 event pairs, 2082 based on Foata normal form. 452/39592 useless extension candidates. Maximal degree in co-relation 202000. Up to 6579 conditions per place. [2022-07-13 21:54:33,743 INFO L132 encePairwiseOnDemand]: 102/115 looper letters, 421 selfloop transitions, 666 changer transitions 56/1282 dead transitions. [2022-07-13 21:54:33,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 1282 transitions, 17106 flow [2022-07-13 21:54:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-13 21:54:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-13 21:54:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4969 transitions. [2022-07-13 21:54:33,752 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7201449275362319 [2022-07-13 21:54:33,752 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4969 transitions. [2022-07-13 21:54:33,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4969 transitions. [2022-07-13 21:54:33,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:33,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4969 transitions. [2022-07-13 21:54:33,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 82.81666666666666) internal successors, (4969), 60 states have internal predecessors, (4969), 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) [2022-07-13 21:54:33,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 115.0) internal successors, (7015), 61 states have internal predecessors, (7015), 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) [2022-07-13 21:54:33,784 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 115.0) internal successors, (7015), 61 states have internal predecessors, (7015), 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) [2022-07-13 21:54:33,785 INFO L186 Difference]: Start difference. First operand has 257 places, 607 transitions, 6378 flow. Second operand 60 states and 4969 transitions. [2022-07-13 21:54:33,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 1282 transitions, 17106 flow [2022-07-13 21:54:48,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1282 transitions, 13945 flow, removed 1574 selfloop flow, removed 4 redundant places. [2022-07-13 21:54:48,042 INFO L242 Difference]: Finished difference. Result has 334 places, 912 transitions, 9795 flow [2022-07-13 21:54:48,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9795, PETRI_PLACES=334, PETRI_TRANSITIONS=912} [2022-07-13 21:54:48,044 INFO L279 CegarLoopForPetriNet]: 95 programPoint places, 239 predicate places. [2022-07-13 21:54:48,044 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 912 transitions, 9795 flow [2022-07-13 21:54:48,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 77.06666666666666) internal successors, (2312), 30 states have internal predecessors, (2312), 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) [2022-07-13 21:54:48,045 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:48,045 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 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] [2022-07-13 21:54:48,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 21:54:48,259 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,SelfDestructingSolverStorable8 [2022-07-13 21:54:48,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:54:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1796516230, now seen corresponding path program 1 times [2022-07-13 21:54:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:48,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660772083] [2022-07-13 21:54:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:48,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:54:48,278 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:54:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:54:48,322 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:54:48,325 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:54:48,325 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-13 21:54:48,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-13 21:54:48,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-13 21:54:48,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-13 21:54:48,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-13 21:54:48,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-13 21:54:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:54:48,327 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:54:48,327 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:54:48,327 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:54:48,356 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:54:48,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 146 places, 134 transitions, 332 flow [2022-07-13 21:54:48,369 INFO L129 PetriNetUnfolder]: 7/165 cut-off events. [2022-07-13 21:54:48,370 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:54:48,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 165 events. 7/165 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 218 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 185. Up to 10 conditions per place. [2022-07-13 21:54:48,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 134 transitions, 332 flow [2022-07-13 21:54:48,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 94 transitions, 223 flow [2022-07-13 21:54:48,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:54:48,375 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6afe97f6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@129c1e68 [2022-07-13 21:54:48,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-13 21:54:48,377 INFO L129 PetriNetUnfolder]: 3/55 cut-off events. [2022-07-13 21:54:48,377 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:54:48,377 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:48,378 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] [2022-07-13 21:54:48,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:54:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:48,379 INFO L85 PathProgramCache]: Analyzing trace with hash 536743157, now seen corresponding path program 1 times [2022-07-13 21:54:48,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:48,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210193247] [2022-07-13 21:54:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:48,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:48,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:48,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210193247] [2022-07-13 21:54:48,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210193247] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:48,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:48,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:54:48,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507873205] [2022-07-13 21:54:48,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:48,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:54:48,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:48,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:54:48,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:54:48,484 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 134 [2022-07-13 21:54:48,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 94 transitions, 223 flow. Second operand has 8 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 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) [2022-07-13 21:54:48,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:48,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 134 [2022-07-13 21:54:48,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:49,429 INFO L129 PetriNetUnfolder]: 8853/14855 cut-off events. [2022-07-13 21:54:49,429 INFO L130 PetriNetUnfolder]: For 2792/2792 co-relation queries the response was YES. [2022-07-13 21:54:49,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28395 conditions, 14855 events. 8853/14855 cut-off events. For 2792/2792 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 126078 event pairs, 921 based on Foata normal form. 271/13780 useless extension candidates. Maximal degree in co-relation 28342. Up to 5043 conditions per place. [2022-07-13 21:54:49,518 INFO L132 encePairwiseOnDemand]: 119/134 looper letters, 90 selfloop transitions, 20 changer transitions 6/177 dead transitions. [2022-07-13 21:54:49,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 177 transitions, 753 flow [2022-07-13 21:54:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:54:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:54:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1106 transitions. [2022-07-13 21:54:49,520 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7503392130257802 [2022-07-13 21:54:49,520 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1106 transitions. [2022-07-13 21:54:49,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1106 transitions. [2022-07-13 21:54:49,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:49,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1106 transitions. [2022-07-13 21:54:49,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 100.54545454545455) internal successors, (1106), 11 states have internal predecessors, (1106), 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) [2022-07-13 21:54:49,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 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) [2022-07-13 21:54:49,524 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 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) [2022-07-13 21:54:49,524 INFO L186 Difference]: Start difference. First operand has 103 places, 94 transitions, 223 flow. Second operand 11 states and 1106 transitions. [2022-07-13 21:54:49,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 177 transitions, 753 flow [2022-07-13 21:54:49,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 177 transitions, 704 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-07-13 21:54:49,528 INFO L242 Difference]: Finished difference. Result has 116 places, 105 transitions, 334 flow [2022-07-13 21:54:49,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=334, PETRI_PLACES=116, PETRI_TRANSITIONS=105} [2022-07-13 21:54:49,528 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 13 predicate places. [2022-07-13 21:54:49,529 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 105 transitions, 334 flow [2022-07-13 21:54:49,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 90.625) internal successors, (725), 8 states have internal predecessors, (725), 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) [2022-07-13 21:54:49,529 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:49,529 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] [2022-07-13 21:54:49,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:54:49,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:54:49,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:49,530 INFO L85 PathProgramCache]: Analyzing trace with hash 592297315, now seen corresponding path program 1 times [2022-07-13 21:54:49,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:49,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328296477] [2022-07-13 21:54:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:49,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:49,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:49,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328296477] [2022-07-13 21:54:49,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328296477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:49,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:49,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-13 21:54:49,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514128246] [2022-07-13 21:54:49,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:49,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:54:49,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:49,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:54:49,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-13 21:54:49,671 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 134 [2022-07-13 21:54:49,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 105 transitions, 334 flow. Second operand has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 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) [2022-07-13 21:54:49,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:49,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 134 [2022-07-13 21:54:49,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:55,948 INFO L129 PetriNetUnfolder]: 44231/77184 cut-off events. [2022-07-13 21:54:55,948 INFO L130 PetriNetUnfolder]: For 59453/59453 co-relation queries the response was YES. [2022-07-13 21:54:56,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199386 conditions, 77184 events. 44231/77184 cut-off events. For 59453/59453 co-relation queries the response was YES. Maximal size of possible extension queue 3823. Compared 750244 event pairs, 6756 based on Foata normal form. 325/74157 useless extension candidates. Maximal degree in co-relation 199324. Up to 15811 conditions per place. [2022-07-13 21:54:56,724 INFO L132 encePairwiseOnDemand]: 116/134 looper letters, 282 selfloop transitions, 116 changer transitions 17/470 dead transitions. [2022-07-13 21:54:56,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 470 transitions, 2653 flow [2022-07-13 21:54:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 21:54:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-13 21:54:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3379 transitions. [2022-07-13 21:54:56,729 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7004560530679934 [2022-07-13 21:54:56,729 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3379 transitions. [2022-07-13 21:54:56,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3379 transitions. [2022-07-13 21:54:56,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:56,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3379 transitions. [2022-07-13 21:54:56,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 93.86111111111111) internal successors, (3379), 36 states have internal predecessors, (3379), 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) [2022-07-13 21:54:56,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 134.0) internal successors, (4958), 37 states have internal predecessors, (4958), 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) [2022-07-13 21:54:56,743 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 134.0) internal successors, (4958), 37 states have internal predecessors, (4958), 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) [2022-07-13 21:54:56,743 INFO L186 Difference]: Start difference. First operand has 116 places, 105 transitions, 334 flow. Second operand 36 states and 3379 transitions. [2022-07-13 21:54:56,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 470 transitions, 2653 flow [2022-07-13 21:54:57,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 470 transitions, 2647 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 21:54:57,292 INFO L242 Difference]: Finished difference. Result has 168 places, 213 transitions, 1344 flow [2022-07-13 21:54:57,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1344, PETRI_PLACES=168, PETRI_TRANSITIONS=213} [2022-07-13 21:54:57,293 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 65 predicate places. [2022-07-13 21:54:57,293 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 213 transitions, 1344 flow [2022-07-13 21:54:57,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.61538461538461) internal successors, (1100), 13 states have internal predecessors, (1100), 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) [2022-07-13 21:54:57,293 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:57,293 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:57,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:54:57,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 21:54:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:57,294 INFO L85 PathProgramCache]: Analyzing trace with hash 800739264, now seen corresponding path program 1 times [2022-07-13 21:54:57,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:57,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892019838] [2022-07-13 21:54:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:57,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:57,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892019838] [2022-07-13 21:54:57,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892019838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:54:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092590026] [2022-07-13 21:54:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:57,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:54:57,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:54:57,382 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) [2022-07-13 21:54:57,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:54:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 21:54:57,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:54:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:57,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:54:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:57,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092590026] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:54:57,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:54:57,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-07-13 21:54:57,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509814953] [2022-07-13 21:54:57,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:54:57,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 21:54:57,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:57,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 21:54:57,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:54:57,805 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 134 [2022-07-13 21:54:57,806 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 213 transitions, 1344 flow. Second operand has 25 states, 25 states have (on average 88.16) internal successors, (2204), 25 states have internal predecessors, (2204), 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) [2022-07-13 21:54:57,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:57,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 134 [2022-07-13 21:54:57,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand