./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/fib_safe-10.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 a48fe857d08ac3a4ba438de35e4bd3e7e5363b4267f7ed4ba2475f684ca08cd5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 09:52:17,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 09:52:17,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 09:52:17,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 09:52:17,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 09:52:17,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 09:52:17,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 09:52:17,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 09:52:17,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 09:52:17,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 09:52:17,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 09:52:17,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 09:52:17,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 09:52:17,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 09:52:17,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 09:52:17,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 09:52:17,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 09:52:17,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 09:52:17,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 09:52:17,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 09:52:17,464 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 09:52:17,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 09:52:17,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 09:52:17,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 09:52:17,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 09:52:17,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 09:52:17,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 09:52:17,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 09:52:17,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 09:52:17,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 09:52:17,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 09:52:17,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 09:52:17,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 09:52:17,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 09:52:17,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 09:52:17,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 09:52:17,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 09:52:17,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 09:52:17,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 09:52:17,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 09:52:17,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 09:52:17,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 09:52:17,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 09:52:17,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 09:52:17,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 09:52:17,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 09:52:17,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 09:52:17,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 09:52:17,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 09:52:17,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 09:52:17,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 09:52:17,506 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 09:52:17,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 09:52:17,507 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 09:52:17,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 09:52:17,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 09:52:17,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 09:52:17,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 09:52:17,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 09:52:17,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 09:52:17,508 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 09:52:17,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 09:52:17,509 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 09:52:17,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 09:52:17,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 09:52:17,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 09:52:17,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 09:52:17,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:52:17,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 09:52:17,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 09:52:17,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 09:52:17,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 09:52:17,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 09:52:17,511 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 09:52:17,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 09:52:17,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 09:52:17,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a48fe857d08ac3a4ba438de35e4bd3e7e5363b4267f7ed4ba2475f684ca08cd5 [2022-07-12 09:52:17,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 09:52:17,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 09:52:17,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 09:52:17,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 09:52:17,729 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 09:52:17,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-10.i [2022-07-12 09:52:17,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d040394a/96a8d8005768402e90940a758dc6932b/FLAG93a07ce92 [2022-07-12 09:52:18,190 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 09:52:18,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-10.i [2022-07-12 09:52:18,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d040394a/96a8d8005768402e90940a758dc6932b/FLAG93a07ce92 [2022-07-12 09:52:18,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d040394a/96a8d8005768402e90940a758dc6932b [2022-07-12 09:52:18,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 09:52:18,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 09:52:18,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 09:52:18,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 09:52:18,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 09:52:18,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5606c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18, skipping insertion in model container [2022-07-12 09:52:18,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 09:52:18,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 09:52:18,569 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/fib_safe-10.i[30815,30828] [2022-07-12 09:52:18,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:52:18,577 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 09:52:18,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-10.i[30815,30828] [2022-07-12 09:52:18,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:52:18,649 INFO L208 MainTranslator]: Completed translation [2022-07-12 09:52:18,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18 WrapperNode [2022-07-12 09:52:18,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 09:52:18,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 09:52:18,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 09:52:18,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 09:52:18,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,697 INFO L137 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-07-12 09:52:18,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 09:52:18,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 09:52:18,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 09:52:18,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 09:52:18,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 09:52:18,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 09:52:18,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 09:52:18,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 09:52:18,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (1/1) ... [2022-07-12 09:52:18,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:52:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:52:18,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 09:52:18,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 09:52:18,773 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-12 09:52:18,774 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-12 09:52:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-12 09:52:18,774 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-12 09:52:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 09:52:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 09:52:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 09:52:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 09:52:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 09:52:18,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 09:52:18,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 09:52:18,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 09:52:18,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 09:52:18,776 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 09:52:18,896 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 09:52:18,897 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 09:52:19,058 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 09:52:19,063 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 09:52:19,063 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 09:52:19,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:52:19 BoogieIcfgContainer [2022-07-12 09:52:19,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 09:52:19,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 09:52:19,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 09:52:19,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 09:52:19,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 09:52:18" (1/3) ... [2022-07-12 09:52:19,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130266d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:52:19, skipping insertion in model container [2022-07-12 09:52:19,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:52:18" (2/3) ... [2022-07-12 09:52:19,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130266d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:52:19, skipping insertion in model container [2022-07-12 09:52:19,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:52:19" (3/3) ... [2022-07-12 09:52:19,070 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2022-07-12 09:52:19,074 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 09:52:19,080 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 09:52:19,080 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 09:52:19,080 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 09:52:19,132 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 09:52:19,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2022-07-12 09:52:19,205 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-07-12 09:52:19,205 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 09:52:19,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2022-07-12 09:52:19,208 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 96 transitions, 202 flow [2022-07-12 09:52:19,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 194 flow [2022-07-12 09:52:19,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 09:52:19,228 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@5333458c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@224af5fb [2022-07-12 09:52:19,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 09:52:19,252 INFO L129 PetriNetUnfolder]: 6/83 cut-off events. [2022-07-12 09:52:19,253 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 09:52:19,254 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:52:19,254 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] [2022-07-12 09:52:19,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:52:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:52:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1927097680, now seen corresponding path program 1 times [2022-07-12 09:52:19,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:52:19,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023018334] [2022-07-12 09:52:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:52:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:52:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:52:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:19,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:52:19,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023018334] [2022-07-12 09:52:19,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023018334] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:52:19,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:52:19,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 09:52:19,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222504646] [2022-07-12 09:52:19,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:52:19,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 09:52:19,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:52:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 09:52:19,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:52:19,498 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 96 [2022-07-12 09:52:19,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:19,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:52:19,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 96 [2022-07-12 09:52:19,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:52:19,535 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2022-07-12 09:52:19,535 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 09:52:19,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 3/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 5/90 useless extension candidates. Maximal degree in co-relation 60. Up to 3 conditions per place. [2022-07-12 09:52:19,538 INFO L132 encePairwiseOnDemand]: 92/96 looper letters, 2 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2022-07-12 09:52:19,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 188 flow [2022-07-12 09:52:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 09:52:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 09:52:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2022-07-12 09:52:19,549 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2022-07-12 09:52:19,549 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2022-07-12 09:52:19,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2022-07-12 09:52:19,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:52:19,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2022-07-12 09:52:19,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:19,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:19,562 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:19,564 INFO L186 Difference]: Start difference. First operand has 94 places, 94 transitions, 194 flow. Second operand 2 states and 184 transitions. [2022-07-12 09:52:19,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 188 flow [2022-07-12 09:52:19,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 09:52:19,570 INFO L242 Difference]: Finished difference. Result has 92 places, 89 transitions, 182 flow [2022-07-12 09:52:19,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2022-07-12 09:52:19,577 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places. [2022-07-12 09:52:19,577 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 182 flow [2022-07-12 09:52:19,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:19,578 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:52:19,578 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] [2022-07-12 09:52:19,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 09:52:19,579 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:52:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:52:19,579 INFO L85 PathProgramCache]: Analyzing trace with hash 560415153, now seen corresponding path program 1 times [2022-07-12 09:52:19,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:52:19,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885740464] [2022-07-12 09:52:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:52:19,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:52:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:52:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:52:19,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885740464] [2022-07-12 09:52:19,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885740464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:52:19,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:52:19,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:52:19,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795121836] [2022-07-12 09:52:19,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:52:19,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:52:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:52:19,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:52:19,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:52:19,682 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 96 [2022-07-12 09:52:19,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:19,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:52:19,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 96 [2022-07-12 09:52:19,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:52:19,713 INFO L129 PetriNetUnfolder]: 3/95 cut-off events. [2022-07-12 09:52:19,714 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 09:52:19,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 95 events. 3/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-07-12 09:52:19,715 INFO L132 encePairwiseOnDemand]: 93/96 looper letters, 9 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-07-12 09:52:19,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 210 flow [2022-07-12 09:52:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:52:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 09:52:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2022-07-12 09:52:19,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.90625 [2022-07-12 09:52:19,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2022-07-12 09:52:19,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2022-07-12 09:52:19,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:52:19,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2022-07-12 09:52:19,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:19,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:19,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:19,725 INFO L186 Difference]: Start difference. First operand has 92 places, 89 transitions, 182 flow. Second operand 3 states and 261 transitions. [2022-07-12 09:52:19,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 210 flow [2022-07-12 09:52:19,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 09:52:19,728 INFO L242 Difference]: Finished difference. Result has 95 places, 90 transitions, 194 flow [2022-07-12 09:52:19,728 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2022-07-12 09:52:19,729 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2022-07-12 09:52:19,729 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 194 flow [2022-07-12 09:52:19,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:19,729 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:52:19,730 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:52:19,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 09:52:19,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:52:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:52:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash -951035470, now seen corresponding path program 1 times [2022-07-12 09:52:19,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:52:19,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059484718] [2022-07-12 09:52:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:52:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:52:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:52:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:19,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:52:19,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059484718] [2022-07-12 09:52:19,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059484718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:52:19,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797079871] [2022-07-12 09:52:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:52:19,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:52:19,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:52:19,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:52:19,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 09:52:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:52:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 09:52:19,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:52:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:19,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:52:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:19,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797079871] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:52:19,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:52:19,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 09:52:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133558778] [2022-07-12 09:52:19,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:52:19,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 09:52:19,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:52:19,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 09:52:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 09:52:20,000 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-07-12 09:52:20,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 194 flow. Second operand has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:20,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:52:20,001 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-07-12 09:52:20,001 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:52:20,068 INFO L129 PetriNetUnfolder]: 3/104 cut-off events. [2022-07-12 09:52:20,069 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 09:52:20,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 104 events. 3/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 133. Up to 6 conditions per place. [2022-07-12 09:52:20,071 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 10 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2022-07-12 09:52:20,071 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 250 flow [2022-07-12 09:52:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 09:52:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 09:52:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 750 transitions. [2022-07-12 09:52:20,073 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8680555555555556 [2022-07-12 09:52:20,073 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 750 transitions. [2022-07-12 09:52:20,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 750 transitions. [2022-07-12 09:52:20,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:52:20,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 750 transitions. [2022-07-12 09:52:20,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.33333333333333) internal successors, (750), 9 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:20,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 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) [2022-07-12 09:52:20,077 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 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) [2022-07-12 09:52:20,077 INFO L186 Difference]: Start difference. First operand has 95 places, 90 transitions, 194 flow. Second operand 9 states and 750 transitions. [2022-07-12 09:52:20,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 250 flow [2022-07-12 09:52:20,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 09:52:20,083 INFO L242 Difference]: Finished difference. Result has 105 places, 96 transitions, 242 flow [2022-07-12 09:52:20,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2022-07-12 09:52:20,085 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2022-07-12 09:52:20,086 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 242 flow [2022-07-12 09:52:20,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:20,086 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:52:20,087 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:52:20,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 09:52:20,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:52:20,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:52:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:52:20,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1666707666, now seen corresponding path program 2 times [2022-07-12 09:52:20,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:52:20,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849803699] [2022-07-12 09:52:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:52:20,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:52:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:52:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:20,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:52:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849803699] [2022-07-12 09:52:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849803699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:52:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912551172] [2022-07-12 09:52:20,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 09:52:20,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:52:20,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:52:20,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:52:20,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 09:52:20,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 09:52:20,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 09:52:20,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 09:52:20,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:52:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:20,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:52:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:20,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912551172] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:52:20,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:52:20,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 09:52:20,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959302139] [2022-07-12 09:52:20,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:52:20,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 09:52:20,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:52:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 09:52:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 09:52:20,578 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-07-12 09:52:20,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 242 flow. Second operand has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:20,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:52:20,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-07-12 09:52:20,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:52:20,755 INFO L129 PetriNetUnfolder]: 3/132 cut-off events. [2022-07-12 09:52:20,755 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 09:52:20,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 132 events. 3/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place. [2022-07-12 09:52:20,756 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 14 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2022-07-12 09:52:20,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 114 transitions, 408 flow [2022-07-12 09:52:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 09:52:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 09:52:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1740 transitions. [2022-07-12 09:52:20,759 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381 [2022-07-12 09:52:20,759 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1740 transitions. [2022-07-12 09:52:20,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1740 transitions. [2022-07-12 09:52:20,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:52:20,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1740 transitions. [2022-07-12 09:52:20,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.85714285714286) internal successors, (1740), 21 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:20,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:20,765 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:20,765 INFO L186 Difference]: Start difference. First operand has 105 places, 96 transitions, 242 flow. Second operand 21 states and 1740 transitions. [2022-07-12 09:52:20,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 114 transitions, 408 flow [2022-07-12 09:52:20,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 394 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 09:52:20,768 INFO L242 Difference]: Finished difference. Result has 129 places, 109 transitions, 366 flow [2022-07-12 09:52:20,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=366, PETRI_PLACES=129, PETRI_TRANSITIONS=109} [2022-07-12 09:52:20,768 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, 35 predicate places. [2022-07-12 09:52:20,769 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 109 transitions, 366 flow [2022-07-12 09:52:20,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:20,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:52:20,769 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:52:20,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 09:52:20,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 09:52:20,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:52:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:52:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1283180782, now seen corresponding path program 3 times [2022-07-12 09:52:20,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:52:20,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978710962] [2022-07-12 09:52:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:52:20,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:52:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:52:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:21,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:52:21,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978710962] [2022-07-12 09:52:21,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978710962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:52:21,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501738855] [2022-07-12 09:52:21,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 09:52:21,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:52:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:52:21,146 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:52:21,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 09:52:21,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-12 09:52:21,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 09:52:21,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 09:52:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:52:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:21,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:52:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:21,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501738855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:52:21,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:52:21,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 09:52:21,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195004785] [2022-07-12 09:52:21,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:52:21,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 09:52:21,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:52:21,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 09:52:21,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 09:52:21,545 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-07-12 09:52:21,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 109 transitions, 366 flow. Second operand has 34 states, 34 states have (on average 83.0) internal successors, (2822), 34 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:21,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 09:52:21,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-07-12 09:52:21,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 09:52:21,941 INFO L129 PetriNetUnfolder]: 3/188 cut-off events. [2022-07-12 09:52:21,941 INFO L130 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2022-07-12 09:52:21,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 188 events. 3/188 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 438. Up to 27 conditions per place. [2022-07-12 09:52:21,943 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 22 selfloop transitions, 45 changer transitions 0/146 dead transitions. [2022-07-12 09:52:21,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 146 transitions, 788 flow [2022-07-12 09:52:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 09:52:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 09:52:21,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3720 transitions. [2022-07-12 09:52:21,949 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2022-07-12 09:52:21,949 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3720 transitions. [2022-07-12 09:52:21,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3720 transitions. [2022-07-12 09:52:21,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 09:52:21,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3720 transitions. [2022-07-12 09:52:21,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 82.66666666666667) internal successors, (3720), 45 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:21,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 96.0) internal successors, (4416), 46 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:21,961 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 96.0) internal successors, (4416), 46 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:21,961 INFO L186 Difference]: Start difference. First operand has 129 places, 109 transitions, 366 flow. Second operand 45 states and 3720 transitions. [2022-07-12 09:52:21,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 146 transitions, 788 flow [2022-07-12 09:52:21,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 146 transitions, 748 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 09:52:21,967 INFO L242 Difference]: Finished difference. Result has 176 places, 134 transitions, 644 flow [2022-07-12 09:52:21,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=644, PETRI_PLACES=176, PETRI_TRANSITIONS=134} [2022-07-12 09:52:21,967 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, 82 predicate places. [2022-07-12 09:52:21,968 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 134 transitions, 644 flow [2022-07-12 09:52:21,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 83.0) internal successors, (2822), 34 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:52:21,969 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 09:52:21,969 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:52:21,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 09:52:22,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:52:22,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 09:52:22,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:52:22,186 INFO L85 PathProgramCache]: Analyzing trace with hash 835265426, now seen corresponding path program 4 times [2022-07-12 09:52:22,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:52:22,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89397872] [2022-07-12 09:52:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:52:22,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:52:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:52:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:52:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89397872] [2022-07-12 09:52:22,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89397872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:52:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511262247] [2022-07-12 09:52:22,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 09:52:22,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:52:22,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:52:22,520 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 09:52:22,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 09:52:22,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 09:52:22,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 09:52:22,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-12 09:52:22,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:52:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 572 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:52:24,512 INFO L328 TraceCheckSpWp]: Computing backward predicates...