./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-lit/fkp2013_variant-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-lit/fkp2013_variant-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 6f1a33edf94ce8e584ad249b95ad5bb2102c6ab4d820eebd8874b39ecbf22785 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:45:11,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:45:11,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:45:11,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:45:11,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:45:11,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:45:11,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:45:11,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:45:11,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:45:11,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:45:11,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:45:11,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:45:11,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:45:11,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:45:11,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:45:11,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:45:11,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:45:11,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:45:11,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:45:11,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:45:11,467 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:45:11,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:45:11,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:45:11,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:45:11,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:45:11,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:45:11,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:45:11,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:45:11,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:45:11,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:45:11,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:45:11,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:45:11,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:45:11,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:45:11,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:45:11,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:45:11,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:45:11,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:45:11,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:45:11,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:45:11,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:45:11,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:45:11,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:45:11,524 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:45:11,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:45:11,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:45:11,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:45:11,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:45:11,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:45:11,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:45:11,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:45:11,527 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:45:11,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:45:11,528 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:45:11,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:45:11,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:45:11,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:45:11,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:45:11,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:45:11,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:45:11,537 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:45:11,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:45:11,537 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:45:11,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:45:11,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:45:11,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:45:11,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:45:11,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:45:11,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:45:11,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:45:11,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:45:11,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:45:11,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:45:11,540 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:45:11,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:45:11,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:45:11,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f1a33edf94ce8e584ad249b95ad5bb2102c6ab4d820eebd8874b39ecbf22785 [2022-07-21 08:45:11,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:45:11,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:45:11,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:45:11,914 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:45:11,914 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:45:11,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-lit/fkp2013_variant-1.i [2022-07-21 08:45:11,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/416914e39/0f8904de722e4169823d506ddcfe192d/FLAG783a46234 [2022-07-21 08:45:12,491 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:45:12,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/fkp2013_variant-1.i [2022-07-21 08:45:12,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/416914e39/0f8904de722e4169823d506ddcfe192d/FLAG783a46234 [2022-07-21 08:45:12,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/416914e39/0f8904de722e4169823d506ddcfe192d [2022-07-21 08:45:12,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:45:12,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:45:12,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:45:12,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:45:12,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:45:12,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:45:12" (1/1) ... [2022-07-21 08:45:12,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1197048e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:12, skipping insertion in model container [2022-07-21 08:45:12,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:45:12" (1/1) ... [2022-07-21 08:45:12,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:45:13,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:45:13,266 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/fkp2013_variant-1.i[30003,30016] [2022-07-21 08:45:13,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:45:13,287 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:45:13,329 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/fkp2013_variant-1.i[30003,30016] [2022-07-21 08:45:13,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:45:13,374 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:45:13,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13 WrapperNode [2022-07-21 08:45:13,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:45:13,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:45:13,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:45:13,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:45:13,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,426 INFO L137 Inliner]: procedures = 172, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2022-07-21 08:45:13,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:45:13,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:45:13,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:45:13,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:45:13,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:45:13,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:45:13,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:45:13,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:45:13,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (1/1) ... [2022-07-21 08:45:13,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:45:13,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:45:13,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:45:13,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:45:13,539 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-21 08:45:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-21 08:45:13,540 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-21 08:45:13,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-21 08:45:13,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:45:13,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:45:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:45:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:45:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:45:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:45:13,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:45:13,544 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:45:13,701 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:45:13,713 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:45:13,891 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:45:13,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:45:13,902 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 08:45:13,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:45:13 BoogieIcfgContainer [2022-07-21 08:45:13,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:45:13,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:45:13,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:45:13,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:45:13,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:45:12" (1/3) ... [2022-07-21 08:45:13,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a5a0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:45:13, skipping insertion in model container [2022-07-21 08:45:13,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:45:13" (2/3) ... [2022-07-21 08:45:13,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a5a0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:45:13, skipping insertion in model container [2022-07-21 08:45:13,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:45:13" (3/3) ... [2022-07-21 08:45:13,912 INFO L111 eAbstractionObserver]: Analyzing ICFG fkp2013_variant-1.i [2022-07-21 08:45:13,918 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:45:13,926 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:45:13,926 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:45:13,926 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:45:13,984 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:14,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 80 transitions, 170 flow [2022-07-21 08:45:14,084 INFO L129 PetriNetUnfolder]: 4/93 cut-off events. [2022-07-21 08:45:14,085 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:45:14,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 93 events. 4/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 102 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-07-21 08:45:14,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 80 transitions, 170 flow [2022-07-21 08:45:14,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 79 transitions, 166 flow [2022-07-21 08:45:14,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:14,108 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@4ff8182c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1a3f49c [2022-07-21 08:45:14,109 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:45:14,119 INFO L129 PetriNetUnfolder]: 3/57 cut-off events. [2022-07-21 08:45:14,120 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:45:14,120 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:14,121 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] [2022-07-21 08:45:14,121 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)] === [2022-07-21 08:45:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:14,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1926868283, now seen corresponding path program 1 times [2022-07-21 08:45:14,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:14,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891639326] [2022-07-21 08:45:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:14,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891639326] [2022-07-21 08:45:14,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891639326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:14,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:14,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:45:14,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943128933] [2022-07-21 08:45:14,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:14,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:45:14,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:14,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:45:14,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:45:14,586 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2022-07-21 08:45:14,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 166 flow. Second operand has 9 states, 9 states have (on average 57.44444444444444) internal successors, (517), 9 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:14,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:14,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2022-07-21 08:45:14,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:14,828 INFO L129 PetriNetUnfolder]: 71/344 cut-off events. [2022-07-21 08:45:14,829 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:45:14,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 518 conditions, 344 events. 71/344 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1900 event pairs, 14 based on Foata normal form. 4/311 useless extension candidates. Maximal degree in co-relation 467. Up to 38 conditions per place. [2022-07-21 08:45:14,833 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 28 selfloop transitions, 11 changer transitions 6/100 dead transitions. [2022-07-21 08:45:14,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 100 transitions, 304 flow [2022-07-21 08:45:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:45:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 08:45:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 672 transitions. [2022-07-21 08:45:14,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7636363636363637 [2022-07-21 08:45:14,851 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 672 transitions. [2022-07-21 08:45:14,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 672 transitions. [2022-07-21 08:45:14,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:14,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 672 transitions. [2022-07-21 08:45:14,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 61.09090909090909) internal successors, (672), 11 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:14,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 80.0) internal successors, (960), 12 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:14,873 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 80.0) internal successors, (960), 12 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:14,875 INFO L186 Difference]: Start difference. First operand has 82 places, 79 transitions, 166 flow. Second operand 11 states and 672 transitions. [2022-07-21 08:45:14,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 100 transitions, 304 flow [2022-07-21 08:45:14,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 100 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:45:14,884 INFO L242 Difference]: Finished difference. Result has 94 places, 80 transitions, 209 flow [2022-07-21 08:45:14,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=209, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2022-07-21 08:45:14,890 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 12 predicate places. [2022-07-21 08:45:14,890 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 209 flow [2022-07-21 08:45:14,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.44444444444444) internal successors, (517), 9 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:14,891 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:14,891 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] [2022-07-21 08:45:14,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:45:14,892 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)] === [2022-07-21 08:45:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2080092778, now seen corresponding path program 1 times [2022-07-21 08:45:14,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:14,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001009543] [2022-07-21 08:45:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:14,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:14,950 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:45:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:15,005 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:45:15,006 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:45:15,007 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 08:45:15,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 08:45:15,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-21 08:45:15,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 08:45:15,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:45:15,010 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:45:15,013 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:45:15,013 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:45:15,038 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:15,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 107 places, 101 transitions, 226 flow [2022-07-21 08:45:15,061 INFO L129 PetriNetUnfolder]: 5/119 cut-off events. [2022-07-21 08:45:15,061 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:45:15,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 119 events. 5/119 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 147 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2022-07-21 08:45:15,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 101 transitions, 226 flow [2022-07-21 08:45:15,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 86 transitions, 187 flow [2022-07-21 08:45:15,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:15,066 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@4ff8182c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1a3f49c [2022-07-21 08:45:15,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:45:15,086 INFO L129 PetriNetUnfolder]: 3/58 cut-off events. [2022-07-21 08:45:15,092 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:45:15,092 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:15,092 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] [2022-07-21 08:45:15,093 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)] === [2022-07-21 08:45:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:15,094 INFO L85 PathProgramCache]: Analyzing trace with hash 51703260, now seen corresponding path program 1 times [2022-07-21 08:45:15,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:15,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776262561] [2022-07-21 08:45:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:15,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:15,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:15,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776262561] [2022-07-21 08:45:15,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776262561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:15,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:15,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:45:15,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849083567] [2022-07-21 08:45:15,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:15,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:45:15,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:15,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:45:15,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:45:15,250 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 101 [2022-07-21 08:45:15,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 187 flow. Second operand has 9 states, 9 states have (on average 71.44444444444444) internal successors, (643), 9 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:15,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 101 [2022-07-21 08:45:15,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:15,528 INFO L129 PetriNetUnfolder]: 429/1137 cut-off events. [2022-07-21 08:45:15,529 INFO L130 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-07-21 08:45:15,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 1137 events. 429/1137 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8537 event pairs, 24 based on Foata normal form. 19/1036 useless extension candidates. Maximal degree in co-relation 1887. Up to 213 conditions per place. [2022-07-21 08:45:15,542 INFO L132 encePairwiseOnDemand]: 88/101 looper letters, 54 selfloop transitions, 14 changer transitions 6/133 dead transitions. [2022-07-21 08:45:15,542 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 133 transitions, 465 flow [2022-07-21 08:45:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:45:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 08:45:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 855 transitions. [2022-07-21 08:45:15,549 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7695769576957696 [2022-07-21 08:45:15,549 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 855 transitions. [2022-07-21 08:45:15,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 855 transitions. [2022-07-21 08:45:15,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:15,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 855 transitions. [2022-07-21 08:45:15,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.72727272727273) internal successors, (855), 11 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 101.0) internal successors, (1212), 12 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,557 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 101.0) internal successors, (1212), 12 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,558 INFO L186 Difference]: Start difference. First operand has 91 places, 86 transitions, 187 flow. Second operand 11 states and 855 transitions. [2022-07-21 08:45:15,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 133 transitions, 465 flow [2022-07-21 08:45:15,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 133 transitions, 462 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-21 08:45:15,585 INFO L242 Difference]: Finished difference. Result has 104 places, 91 transitions, 262 flow [2022-07-21 08:45:15,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=262, PETRI_PLACES=104, PETRI_TRANSITIONS=91} [2022-07-21 08:45:15,587 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 13 predicate places. [2022-07-21 08:45:15,587 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 91 transitions, 262 flow [2022-07-21 08:45:15,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 71.44444444444444) internal successors, (643), 9 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:15,588 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:15,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:45:15,589 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)] === [2022-07-21 08:45:15,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash -492590774, now seen corresponding path program 1 times [2022-07-21 08:45:15,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:15,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672757580] [2022-07-21 08:45:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:15,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:15,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672757580] [2022-07-21 08:45:15,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672757580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:15,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:15,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:45:15,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893903820] [2022-07-21 08:45:15,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:15,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:45:15,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:45:15,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:45:15,736 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 101 [2022-07-21 08:45:15,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 91 transitions, 262 flow. Second operand has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:15,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:15,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 101 [2022-07-21 08:45:15,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:16,803 INFO L129 PetriNetUnfolder]: 1799/5396 cut-off events. [2022-07-21 08:45:16,804 INFO L130 PetriNetUnfolder]: For 2292/2292 co-relation queries the response was YES. [2022-07-21 08:45:16,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10623 conditions, 5396 events. 1799/5396 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 52732 event pairs, 196 based on Foata normal form. 25/5190 useless extension candidates. Maximal degree in co-relation 10565. Up to 421 conditions per place. [2022-07-21 08:45:16,843 INFO L132 encePairwiseOnDemand]: 88/101 looper letters, 170 selfloop transitions, 81 changer transitions 17/324 dead transitions. [2022-07-21 08:45:16,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 324 transitions, 1587 flow [2022-07-21 08:45:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 08:45:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 08:45:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2564 transitions. [2022-07-21 08:45:16,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7466511357018055 [2022-07-21 08:45:16,851 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2564 transitions. [2022-07-21 08:45:16,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2564 transitions. [2022-07-21 08:45:16,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:16,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2564 transitions. [2022-07-21 08:45:16,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 75.41176470588235) internal successors, (2564), 34 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:16,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 101.0) internal successors, (3535), 35 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:16,867 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 101.0) internal successors, (3535), 35 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:16,867 INFO L186 Difference]: Start difference. First operand has 104 places, 91 transitions, 262 flow. Second operand 34 states and 2564 transitions. [2022-07-21 08:45:16,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 324 transitions, 1587 flow [2022-07-21 08:45:16,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 324 transitions, 1581 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:45:16,888 INFO L242 Difference]: Finished difference. Result has 153 places, 172 transitions, 964 flow [2022-07-21 08:45:16,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=964, PETRI_PLACES=153, PETRI_TRANSITIONS=172} [2022-07-21 08:45:16,890 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 62 predicate places. [2022-07-21 08:45:16,890 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 172 transitions, 964 flow [2022-07-21 08:45:16,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:16,891 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:16,891 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, 1] [2022-07-21 08:45:16,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:45:16,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:45:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1223427672, now seen corresponding path program 1 times [2022-07-21 08:45:16,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:16,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701001106] [2022-07-21 08:45:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:16,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:16,916 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:45:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:45:16,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:45:16,938 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:45:16,939 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:45:16,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:45:16,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-21 08:45:16,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:45:16,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:45:16,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:45:16,940 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:45:16,941 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:45:16,941 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:45:16,960 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:45:16,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 131 places, 122 transitions, 286 flow [2022-07-21 08:45:16,990 INFO L129 PetriNetUnfolder]: 6/145 cut-off events. [2022-07-21 08:45:16,990 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:45:16,991 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 145 events. 6/145 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2022-07-21 08:45:16,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 122 transitions, 286 flow [2022-07-21 08:45:16,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 93 transitions, 210 flow [2022-07-21 08:45:16,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:45:16,994 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@4ff8182c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1a3f49c [2022-07-21 08:45:16,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:45:16,997 INFO L129 PetriNetUnfolder]: 3/56 cut-off events. [2022-07-21 08:45:16,998 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:45:16,998 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:16,998 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] [2022-07-21 08:45:16,998 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)] === [2022-07-21 08:45:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1852120139, now seen corresponding path program 1 times [2022-07-21 08:45:16,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:16,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887688626] [2022-07-21 08:45:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:17,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:17,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:17,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887688626] [2022-07-21 08:45:17,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887688626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:17,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:17,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:45:17,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953276266] [2022-07-21 08:45:17,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:17,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:45:17,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:45:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:45:17,161 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-21 08:45:17,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 93 transitions, 210 flow. Second operand has 9 states, 9 states have (on average 85.44444444444444) internal successors, (769), 9 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:17,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-21 08:45:17,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:17,754 INFO L129 PetriNetUnfolder]: 2081/4514 cut-off events. [2022-07-21 08:45:17,755 INFO L130 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2022-07-21 08:45:17,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7940 conditions, 4514 events. 2081/4514 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39797 event pairs, 167 based on Foata normal form. 76/4177 useless extension candidates. Maximal degree in co-relation 7887. Up to 1142 conditions per place. [2022-07-21 08:45:17,790 INFO L132 encePairwiseOnDemand]: 108/122 looper letters, 72 selfloop transitions, 17 changer transitions 6/158 dead transitions. [2022-07-21 08:45:17,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 158 transitions, 608 flow [2022-07-21 08:45:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 08:45:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 08:45:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1030 transitions. [2022-07-21 08:45:17,794 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.767511177347243 [2022-07-21 08:45:17,794 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1030 transitions. [2022-07-21 08:45:17,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1030 transitions. [2022-07-21 08:45:17,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:17,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1030 transitions. [2022-07-21 08:45:17,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 93.63636363636364) internal successors, (1030), 11 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 122.0) internal successors, (1464), 12 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,801 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 122.0) internal successors, (1464), 12 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,801 INFO L186 Difference]: Start difference. First operand has 100 places, 93 transitions, 210 flow. Second operand 11 states and 1030 transitions. [2022-07-21 08:45:17,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 158 transitions, 608 flow [2022-07-21 08:45:17,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 158 transitions, 589 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-07-21 08:45:17,805 INFO L242 Difference]: Finished difference. Result has 113 places, 101 transitions, 304 flow [2022-07-21 08:45:17,806 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=304, PETRI_PLACES=113, PETRI_TRANSITIONS=101} [2022-07-21 08:45:17,806 INFO L279 CegarLoopForPetriNet]: 100 programPoint places, 13 predicate places. [2022-07-21 08:45:17,807 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 101 transitions, 304 flow [2022-07-21 08:45:17,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.44444444444444) internal successors, (769), 9 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,807 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:17,808 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:17,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:45:17,808 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)] === [2022-07-21 08:45:17,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:17,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1166444432, now seen corresponding path program 1 times [2022-07-21 08:45:17,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:17,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835100475] [2022-07-21 08:45:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:17,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:17,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835100475] [2022-07-21 08:45:17,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835100475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:45:17,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:45:17,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 08:45:17,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229324477] [2022-07-21 08:45:17,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:45:17,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 08:45:17,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:17,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 08:45:17,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 08:45:17,912 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 122 [2022-07-21 08:45:17,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 101 transitions, 304 flow. Second operand has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:17,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:17,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 122 [2022-07-21 08:45:17,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:20,582 INFO L129 PetriNetUnfolder]: 9650/22033 cut-off events. [2022-07-21 08:45:20,583 INFO L130 PetriNetUnfolder]: For 13109/13109 co-relation queries the response was YES. [2022-07-21 08:45:20,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49191 conditions, 22033 events. 9650/22033 cut-off events. For 13109/13109 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 232282 event pairs, 1378 based on Foata normal form. 95/21172 useless extension candidates. Maximal degree in co-relation 49132. Up to 3081 conditions per place. [2022-07-21 08:45:20,756 INFO L132 encePairwiseOnDemand]: 108/122 looper letters, 234 selfloop transitions, 97 changer transitions 17/408 dead transitions. [2022-07-21 08:45:20,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 408 transitions, 2179 flow [2022-07-21 08:45:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 08:45:20,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-21 08:45:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3116 transitions. [2022-07-21 08:45:20,765 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7512054001928641 [2022-07-21 08:45:20,765 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3116 transitions. [2022-07-21 08:45:20,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3116 transitions. [2022-07-21 08:45:20,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:20,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3116 transitions. [2022-07-21 08:45:20,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 91.6470588235294) internal successors, (3116), 34 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:20,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 122.0) internal successors, (4270), 35 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:20,785 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 122.0) internal successors, (4270), 35 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:20,785 INFO L186 Difference]: Start difference. First operand has 113 places, 101 transitions, 304 flow. Second operand 34 states and 3116 transitions. [2022-07-21 08:45:20,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 408 transitions, 2179 flow [2022-07-21 08:45:20,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 408 transitions, 2173 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:45:20,906 INFO L242 Difference]: Finished difference. Result has 163 places, 196 transitions, 1168 flow [2022-07-21 08:45:20,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1168, PETRI_PLACES=163, PETRI_TRANSITIONS=196} [2022-07-21 08:45:20,908 INFO L279 CegarLoopForPetriNet]: 100 programPoint places, 63 predicate places. [2022-07-21 08:45:20,908 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 196 transitions, 1168 flow [2022-07-21 08:45:20,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:20,911 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:20,911 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] [2022-07-21 08:45:20,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:45:20,915 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)] === [2022-07-21 08:45:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash -517292059, now seen corresponding path program 1 times [2022-07-21 08:45:20,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:20,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036044568] [2022-07-21 08:45:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:20,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:21,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:21,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036044568] [2022-07-21 08:45:21,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036044568] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:45:21,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146039640] [2022-07-21 08:45:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:21,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:45:21,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:45:21,077 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) [2022-07-21 08:45:21,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:45:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:21,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 08:45:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:45:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:21,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:45:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:21,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146039640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:45:21,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:45:21,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-07-21 08:45:21,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59297337] [2022-07-21 08:45:21,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:45:21,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 08:45:21,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:21,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 08:45:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-07-21 08:45:21,635 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 122 [2022-07-21 08:45:21,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 196 transitions, 1168 flow. Second operand has 25 states, 25 states have (on average 83.32) internal successors, (2083), 25 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:21,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:21,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 122 [2022-07-21 08:45:21,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:28,063 INFO L129 PetriNetUnfolder]: 15631/36403 cut-off events. [2022-07-21 08:45:28,063 INFO L130 PetriNetUnfolder]: For 141146/141148 co-relation queries the response was YES. [2022-07-21 08:45:28,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120231 conditions, 36403 events. 15631/36403 cut-off events. For 141146/141148 co-relation queries the response was YES. Maximal size of possible extension queue 2349. Compared 424718 event pairs, 3756 based on Foata normal form. 184/36528 useless extension candidates. Maximal degree in co-relation 120150. Up to 5613 conditions per place. [2022-07-21 08:45:28,525 INFO L132 encePairwiseOnDemand]: 105/122 looper letters, 388 selfloop transitions, 330 changer transitions 28/805 dead transitions. [2022-07-21 08:45:28,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 805 transitions, 7121 flow [2022-07-21 08:45:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-21 08:45:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-21 08:45:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 5211 transitions. [2022-07-21 08:45:28,535 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7364330130016958 [2022-07-21 08:45:28,535 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 5211 transitions. [2022-07-21 08:45:28,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 5211 transitions. [2022-07-21 08:45:28,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:28,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 5211 transitions. [2022-07-21 08:45:28,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 89.84482758620689) internal successors, (5211), 58 states have internal predecessors, (5211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:28,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 122.0) internal successors, (7198), 59 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:28,564 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 122.0) internal successors, (7198), 59 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:28,565 INFO L186 Difference]: Start difference. First operand has 163 places, 196 transitions, 1168 flow. Second operand 58 states and 5211 transitions. [2022-07-21 08:45:28,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 805 transitions, 7121 flow [2022-07-21 08:45:29,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 805 transitions, 6863 flow, removed 128 selfloop flow, removed 1 redundant places. [2022-07-21 08:45:29,970 INFO L242 Difference]: Finished difference. Result has 237 places, 500 transitions, 4724 flow [2022-07-21 08:45:29,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=4724, PETRI_PLACES=237, PETRI_TRANSITIONS=500} [2022-07-21 08:45:29,972 INFO L279 CegarLoopForPetriNet]: 100 programPoint places, 137 predicate places. [2022-07-21 08:45:29,972 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 500 transitions, 4724 flow [2022-07-21 08:45:29,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 83.32) internal successors, (2083), 25 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:29,973 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:45:29,973 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:45:30,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:45:30,187 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 [2022-07-21 08:45:30,188 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)] === [2022-07-21 08:45:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:45:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1062080251, now seen corresponding path program 1 times [2022-07-21 08:45:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:45:30,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290316012] [2022-07-21 08:45:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:30,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:45:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:30,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:45:30,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290316012] [2022-07-21 08:45:30,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290316012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:45:30,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588071721] [2022-07-21 08:45:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:45:30,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:45:30,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:45:30,356 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) [2022-07-21 08:45:30,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:45:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:45:30,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 08:45:30,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:45:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:30,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:45:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:45:30,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588071721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:45:30,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:45:30,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-21 08:45:30,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523609408] [2022-07-21 08:45:30,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:45:30,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 08:45:30,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:45:30,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 08:45:30,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-07-21 08:45:30,940 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 122 [2022-07-21 08:45:30,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 500 transitions, 4724 flow. Second operand has 29 states, 29 states have (on average 82.10344827586206) internal successors, (2381), 29 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:30,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:45:30,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 122 [2022-07-21 08:45:30,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:45:52,287 INFO L129 PetriNetUnfolder]: 36015/87430 cut-off events. [2022-07-21 08:45:52,287 INFO L130 PetriNetUnfolder]: For 500250/500406 co-relation queries the response was YES. [2022-07-21 08:45:53,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 330411 conditions, 87430 events. 36015/87430 cut-off events. For 500250/500406 co-relation queries the response was YES. Maximal size of possible extension queue 5234. Compared 1167776 event pairs, 4616 based on Foata normal form. 174/87549 useless extension candidates. Maximal degree in co-relation 330309. Up to 9032 conditions per place. [2022-07-21 08:45:53,953 INFO L132 encePairwiseOnDemand]: 104/122 looper letters, 1037 selfloop transitions, 1193 changer transitions 601/2889 dead transitions. [2022-07-21 08:45:53,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 2889 transitions, 31657 flow [2022-07-21 08:45:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2022-07-21 08:45:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2022-07-21 08:45:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 21521 transitions. [2022-07-21 08:45:53,983 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7170798347327736 [2022-07-21 08:45:53,983 INFO L72 ComplementDD]: Start complementDD. Operand 246 states and 21521 transitions. [2022-07-21 08:45:53,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 246 states and 21521 transitions. [2022-07-21 08:45:53,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:45:53,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 246 states and 21521 transitions. [2022-07-21 08:45:54,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 247 states, 246 states have (on average 87.48373983739837) internal successors, (21521), 246 states have internal predecessors, (21521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:54,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 247 states, 247 states have (on average 122.0) internal successors, (30134), 247 states have internal predecessors, (30134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:54,091 INFO L81 ComplementDD]: Finished complementDD. Result has 247 states, 247 states have (on average 122.0) internal successors, (30134), 247 states have internal predecessors, (30134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:45:54,092 INFO L186 Difference]: Start difference. First operand has 237 places, 500 transitions, 4724 flow. Second operand 246 states and 21521 transitions. [2022-07-21 08:45:54,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 2889 transitions, 31657 flow [2022-07-21 08:46:18,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 2889 transitions, 29744 flow, removed 949 selfloop flow, removed 5 redundant places. [2022-07-21 08:46:18,728 INFO L242 Difference]: Finished difference. Result has 623 places, 1481 transitions, 17685 flow [2022-07-21 08:46:18,729 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=246, PETRI_FLOW=17685, PETRI_PLACES=623, PETRI_TRANSITIONS=1481} [2022-07-21 08:46:18,730 INFO L279 CegarLoopForPetriNet]: 100 programPoint places, 523 predicate places. [2022-07-21 08:46:18,730 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 1481 transitions, 17685 flow [2022-07-21 08:46:18,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 82.10344827586206) internal successors, (2381), 29 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:46:18,732 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:46:18,732 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:46:18,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:46:18,956 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 [2022-07-21 08:46:18,956 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 08:46:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:46:18,957 INFO L85 PathProgramCache]: Analyzing trace with hash 461722973, now seen corresponding path program 2 times [2022-07-21 08:46:18,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:46:18,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228257266] [2022-07-21 08:46:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:46:18,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:46:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:46:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:46:19,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:46:19,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228257266] [2022-07-21 08:46:19,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228257266] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:46:19,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524571478] [2022-07-21 08:46:19,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:46:19,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:46:19,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:46:19,097 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) [2022-07-21 08:46:19,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:46:19,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:46:19,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:46:19,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 08:46:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:46:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:46:19,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:46:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:46:19,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524571478] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:46:19,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:46:19,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-21 08:46:19,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120225994] [2022-07-21 08:46:19,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:46:19,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 08:46:19,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:46:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 08:46:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-07-21 08:46:19,595 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 122 [2022-07-21 08:46:19,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 1481 transitions, 17685 flow. Second operand has 29 states, 29 states have (on average 82.10344827586206) internal successors, (2381), 29 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:46:19,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:46:19,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 122 [2022-07-21 08:46:19,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand