./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-11.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 deae7fd0ef95d67bb618281e50bfba6f50a83de212ef14f46660866b256c6152 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:08:21,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:08:21,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:08:21,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:08:21,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:08:21,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:08:21,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:08:21,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:08:21,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:08:21,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:08:21,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:08:21,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:08:21,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:08:21,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:08:21,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:08:21,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:08:21,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:08:21,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:08:21,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:08:21,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:08:21,381 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:08:21,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:08:21,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:08:21,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:08:21,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:08:21,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:08:21,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:08:21,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:08:21,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:08:21,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:08:21,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:08:21,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:08:21,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:08:21,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:08:21,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:08:21,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:08:21,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:08:21,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:08:21,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:08:21,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:08:21,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:08:21,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:08:21,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:08:21,431 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:08:21,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:08:21,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:08:21,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:08:21,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:08:21,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:08:21,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:08:21,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:08:21,433 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:08:21,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:08:21,435 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:08:21,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:08:21,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:08:21,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:08:21,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:08:21,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:08:21,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:08:21,436 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:08:21,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:08:21,436 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:08:21,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:08:21,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:08:21,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:08:21,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:08:21,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:08:21,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:08:21,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:08:21,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:08:21,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:08:21,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:08:21,438 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:08:21,438 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:08:21,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:08:21,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> deae7fd0ef95d67bb618281e50bfba6f50a83de212ef14f46660866b256c6152 [2022-07-22 21:08:21,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:08:21,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:08:21,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:08:21,696 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:08:21,697 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:08:21,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-11.i [2022-07-22 21:08:21,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1cba952/218c872743524e18a4b9c86a095d0dc2/FLAG7b3d176a2 [2022-07-22 21:08:22,307 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:08:22,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-11.i [2022-07-22 21:08:22,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1cba952/218c872743524e18a4b9c86a095d0dc2/FLAG7b3d176a2 [2022-07-22 21:08:22,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1cba952/218c872743524e18a4b9c86a095d0dc2 [2022-07-22 21:08:22,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:08:22,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:08:22,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:08:22,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:08:22,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:08:22,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:08:22" (1/1) ... [2022-07-22 21:08:22,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a3be17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:22, skipping insertion in model container [2022-07-22 21:08:22,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:08:22" (1/1) ... [2022-07-22 21:08:22,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:08:22,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:08:23,002 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-11.i[30815,30828] [2022-07-22 21:08:23,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:08:23,013 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:08:23,044 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-11.i[30815,30828] [2022-07-22 21:08:23,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:08:23,073 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:08:23,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23 WrapperNode [2022-07-22 21:08:23,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:08:23,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:08:23,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:08:23,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:08:23,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (1/1) ... [2022-07-22 21:08:23,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (1/1) ... [2022-07-22 21:08:23,134 INFO L137 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-07-22 21:08:23,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:08:23,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:08:23,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:08:23,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:08:23,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (1/1) ... [2022-07-22 21:08:23,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (1/1) ... [2022-07-22 21:08:23,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (1/1) ... [2022-07-22 21:08:23,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (1/1) ... [2022-07-22 21:08:23,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (1/1) ... [2022-07-22 21:08:23,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (1/1) ... [2022-07-22 21:08:23,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (1/1) ... [2022-07-22 21:08:23,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:08:23,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:08:23,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:08:23,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:08:23,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (1/1) ... [2022-07-22 21:08:23,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:08:23,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:08:23,217 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) [2022-07-22 21:08:23,243 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 [2022-07-22 21:08:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-22 21:08:23,266 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-22 21:08:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-22 21:08:23,266 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-22 21:08:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:08:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:08:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:08:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:08:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:08:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:08:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:08:23,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:08:23,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:08:23,269 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:08:23,392 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:08:23,393 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:08:23,538 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:08:23,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:08:23,545 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:08:23,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:08:23 BoogieIcfgContainer [2022-07-22 21:08:23,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:08:23,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:08:23,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:08:23,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:08:23,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:08:22" (1/3) ... [2022-07-22 21:08:23,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661f65b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:08:23, skipping insertion in model container [2022-07-22 21:08:23,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:08:23" (2/3) ... [2022-07-22 21:08:23,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661f65b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:08:23, skipping insertion in model container [2022-07-22 21:08:23,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:08:23" (3/3) ... [2022-07-22 21:08:23,555 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2022-07-22 21:08:23,560 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:08:23,567 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:08:23,568 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:08:23,568 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:08:23,604 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:08:23,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2022-07-22 21:08:23,681 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-07-22 21:08:23,682 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:08:23,686 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. [2022-07-22 21:08:23,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 96 transitions, 202 flow [2022-07-22 21:08:23,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 194 flow [2022-07-22 21:08:23,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:08:23,720 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@783bf8c6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@35d67139 [2022-07-22 21:08:23,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:08:23,760 INFO L129 PetriNetUnfolder]: 6/83 cut-off events. [2022-07-22 21:08:23,760 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:08:23,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:08:23,761 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] [2022-07-22 21:08:23,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:08:23,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:23,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1927097680, now seen corresponding path program 1 times [2022-07-22 21:08:23,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:08:23,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301175666] [2022-07-22 21:08:23,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:23,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:08:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:23,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:08:23,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301175666] [2022-07-22 21:08:23,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301175666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:08:23,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:08:23,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:08:23,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253118425] [2022-07-22 21:08:23,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:08:23,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:08:23,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:08:24,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:08:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:08:24,026 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 96 [2022-07-22 21:08:24,028 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) [2022-07-22 21:08:24,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:08:24,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 96 [2022-07-22 21:08:24,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:08:24,074 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2022-07-22 21:08:24,074 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:08:24,075 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. [2022-07-22 21:08:24,082 INFO L132 encePairwiseOnDemand]: 92/96 looper letters, 2 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2022-07-22 21:08:24,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 188 flow [2022-07-22 21:08:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:08:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:08:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2022-07-22 21:08:24,093 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2022-07-22 21:08:24,094 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2022-07-22 21:08:24,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2022-07-22 21:08:24,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:08:24,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2022-07-22 21:08:24,103 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) [2022-07-22 21:08:24,107 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) [2022-07-22 21:08:24,108 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) [2022-07-22 21:08:24,109 INFO L186 Difference]: Start difference. First operand has 94 places, 94 transitions, 194 flow. Second operand 2 states and 184 transitions. [2022-07-22 21:08:24,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 188 flow [2022-07-22 21:08:24,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:08:24,117 INFO L242 Difference]: Finished difference. Result has 92 places, 89 transitions, 182 flow [2022-07-22 21:08:24,119 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} [2022-07-22 21:08:24,122 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places. [2022-07-22 21:08:24,128 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 182 flow [2022-07-22 21:08:24,128 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) [2022-07-22 21:08:24,129 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:08:24,129 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] [2022-07-22 21:08:24,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:08:24,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:08:24,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:24,130 INFO L85 PathProgramCache]: Analyzing trace with hash 560415153, now seen corresponding path program 1 times [2022-07-22 21:08:24,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:08:24,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569139340] [2022-07-22 21:08:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:24,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:08:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:24,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:08:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569139340] [2022-07-22 21:08:24,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569139340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:08:24,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:08:24,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:08:24,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886153411] [2022-07-22 21:08:24,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:08:24,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:08:24,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:08:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:08:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:08:24,269 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 96 [2022-07-22 21:08:24,270 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) [2022-07-22 21:08:24,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:08:24,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 96 [2022-07-22 21:08:24,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:08:24,304 INFO L129 PetriNetUnfolder]: 3/95 cut-off events. [2022-07-22 21:08:24,305 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:08:24,306 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. [2022-07-22 21:08:24,306 INFO L132 encePairwiseOnDemand]: 93/96 looper letters, 9 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-07-22 21:08:24,307 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 210 flow [2022-07-22 21:08:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:08:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:08:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2022-07-22 21:08:24,309 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.90625 [2022-07-22 21:08:24,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2022-07-22 21:08:24,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2022-07-22 21:08:24,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:08:24,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2022-07-22 21:08:24,312 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) [2022-07-22 21:08:24,314 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) [2022-07-22 21:08:24,314 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) [2022-07-22 21:08:24,314 INFO L186 Difference]: Start difference. First operand has 92 places, 89 transitions, 182 flow. Second operand 3 states and 261 transitions. [2022-07-22 21:08:24,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 210 flow [2022-07-22 21:08:24,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:08:24,321 INFO L242 Difference]: Finished difference. Result has 95 places, 90 transitions, 194 flow [2022-07-22 21:08:24,321 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} [2022-07-22 21:08:24,322 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2022-07-22 21:08:24,322 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 194 flow [2022-07-22 21:08:24,323 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) [2022-07-22 21:08:24,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:08:24,323 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:08:24,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:08:24,324 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:08:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash -951035470, now seen corresponding path program 1 times [2022-07-22 21:08:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:08:24,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833781341] [2022-07-22 21:08:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:24,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:08:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:24,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:08:24,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833781341] [2022-07-22 21:08:24,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833781341] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:08:24,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461775910] [2022-07-22 21:08:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:24,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:08:24,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:08:24,442 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) [2022-07-22 21:08:24,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:08:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:24,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:08:24,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:24,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:08:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:24,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461775910] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:08:24,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:08:24,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:08:24,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237827037] [2022-07-22 21:08:24,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:08:24,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:08:24,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:08:24,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:08:24,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:08:24,769 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-07-22 21:08:24,777 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) [2022-07-22 21:08:24,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:08:24,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-07-22 21:08:24,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:08:24,899 INFO L129 PetriNetUnfolder]: 3/104 cut-off events. [2022-07-22 21:08:24,899 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:08:24,900 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. [2022-07-22 21:08:24,900 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 10 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2022-07-22 21:08:24,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 250 flow [2022-07-22 21:08:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 21:08:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-22 21:08:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 750 transitions. [2022-07-22 21:08:24,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8680555555555556 [2022-07-22 21:08:24,913 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 750 transitions. [2022-07-22 21:08:24,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 750 transitions. [2022-07-22 21:08:24,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:08:24,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 750 transitions. [2022-07-22 21:08:24,918 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) [2022-07-22 21:08:24,922 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) [2022-07-22 21:08:24,926 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) [2022-07-22 21:08:24,926 INFO L186 Difference]: Start difference. First operand has 95 places, 90 transitions, 194 flow. Second operand 9 states and 750 transitions. [2022-07-22 21:08:24,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 250 flow [2022-07-22 21:08:24,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:08:24,934 INFO L242 Difference]: Finished difference. Result has 105 places, 96 transitions, 242 flow [2022-07-22 21:08:24,938 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} [2022-07-22 21:08:24,939 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2022-07-22 21:08:24,940 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 242 flow [2022-07-22 21:08:24,940 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) [2022-07-22 21:08:24,941 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:08:24,941 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] [2022-07-22 21:08:24,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:25,155 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 [2022-07-22 21:08:25,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:08:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1666707666, now seen corresponding path program 2 times [2022-07-22 21:08:25,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:08:25,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711516456] [2022-07-22 21:08:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:25,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:08:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:25,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:08:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711516456] [2022-07-22 21:08:25,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711516456] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:08:25,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887438350] [2022-07-22 21:08:25,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:08:25,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:08:25,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:08:25,300 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) [2022-07-22 21:08:25,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:08:25,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:08:25,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:08:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:08:25,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:25,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:08:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:25,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887438350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:08:25,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:08:25,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:08:25,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674324317] [2022-07-22 21:08:25,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:08:25,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:08:25,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:08:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:08:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:08:25,553 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-07-22 21:08:25,555 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) [2022-07-22 21:08:25,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:08:25,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-07-22 21:08:25,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:08:25,733 INFO L129 PetriNetUnfolder]: 3/132 cut-off events. [2022-07-22 21:08:25,734 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-22 21:08:25,735 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. [2022-07-22 21:08:25,736 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 14 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2022-07-22 21:08:25,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 114 transitions, 408 flow [2022-07-22 21:08:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 21:08:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-22 21:08:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1740 transitions. [2022-07-22 21:08:25,741 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381 [2022-07-22 21:08:25,741 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1740 transitions. [2022-07-22 21:08:25,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1740 transitions. [2022-07-22 21:08:25,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:08:25,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1740 transitions. [2022-07-22 21:08:25,747 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) [2022-07-22 21:08:25,751 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) [2022-07-22 21:08:25,752 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) [2022-07-22 21:08:25,752 INFO L186 Difference]: Start difference. First operand has 105 places, 96 transitions, 242 flow. Second operand 21 states and 1740 transitions. [2022-07-22 21:08:25,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 114 transitions, 408 flow [2022-07-22 21:08:25,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 394 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:08:25,757 INFO L242 Difference]: Finished difference. Result has 129 places, 109 transitions, 366 flow [2022-07-22 21:08:25,758 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} [2022-07-22 21:08:25,759 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, 35 predicate places. [2022-07-22 21:08:25,759 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 109 transitions, 366 flow [2022-07-22 21:08:25,760 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) [2022-07-22 21:08:25,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:08:25,761 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] [2022-07-22 21:08:25,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:25,971 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 [2022-07-22 21:08:25,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:08:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1283180782, now seen corresponding path program 3 times [2022-07-22 21:08:25,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:08:25,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214730191] [2022-07-22 21:08:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:25,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:08:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:26,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:08:26,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214730191] [2022-07-22 21:08:26,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214730191] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:08:26,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793542597] [2022-07-22 21:08:26,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:08:26,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:08:26,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:08:26,269 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) [2022-07-22 21:08:26,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:08:26,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 21:08:26,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:08:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:08:26,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:26,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:08:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:26,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793542597] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:08:26,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:08:26,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-22 21:08:26,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899951946] [2022-07-22 21:08:26,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:08:26,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:08:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:08:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:08:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:08:26,779 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2022-07-22 21:08:26,783 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) [2022-07-22 21:08:26,784 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:08:26,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2022-07-22 21:08:26,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:08:27,351 INFO L129 PetriNetUnfolder]: 3/188 cut-off events. [2022-07-22 21:08:27,351 INFO L130 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2022-07-22 21:08:27,353 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. [2022-07-22 21:08:27,354 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 22 selfloop transitions, 45 changer transitions 0/146 dead transitions. [2022-07-22 21:08:27,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 146 transitions, 788 flow [2022-07-22 21:08:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 21:08:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-22 21:08:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3720 transitions. [2022-07-22 21:08:27,368 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2022-07-22 21:08:27,368 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3720 transitions. [2022-07-22 21:08:27,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3720 transitions. [2022-07-22 21:08:27,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:08:27,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3720 transitions. [2022-07-22 21:08:27,381 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) [2022-07-22 21:08:27,390 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) [2022-07-22 21:08:27,391 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) [2022-07-22 21:08:27,392 INFO L186 Difference]: Start difference. First operand has 129 places, 109 transitions, 366 flow. Second operand 45 states and 3720 transitions. [2022-07-22 21:08:27,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 146 transitions, 788 flow [2022-07-22 21:08:27,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 146 transitions, 748 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-22 21:08:27,401 INFO L242 Difference]: Finished difference. Result has 176 places, 134 transitions, 644 flow [2022-07-22 21:08:27,401 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} [2022-07-22 21:08:27,404 INFO L279 CegarLoopForPetriNet]: 94 programPoint places, 82 predicate places. [2022-07-22 21:08:27,405 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 134 transitions, 644 flow [2022-07-22 21:08:27,406 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) [2022-07-22 21:08:27,406 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:08:27,406 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] [2022-07-22 21:08:27,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:08:27,623 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 [2022-07-22 21:08:27,624 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:08:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:08:27,625 INFO L85 PathProgramCache]: Analyzing trace with hash 835265426, now seen corresponding path program 4 times [2022-07-22 21:08:27,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:08:27,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487426738] [2022-07-22 21:08:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:08:27,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:08:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:08:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:28,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:08:28,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487426738] [2022-07-22 21:08:28,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487426738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:08:28,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937305369] [2022-07-22 21:08:28,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:08:28,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:08:28,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:08:28,135 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) [2022-07-22 21:08:28,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:08:28,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:08:28,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:08:28,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-22 21:08:28,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:08:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 572 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:08:30,664 INFO L328 TraceCheckSpWp]: Computing backward predicates...