/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-12.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-13 02:44:27,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 02:44:27,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 02:44:27,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 02:44:27,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 02:44:27,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 02:44:27,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 02:44:27,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 02:44:27,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 02:44:27,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 02:44:27,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 02:44:27,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 02:44:27,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 02:44:27,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 02:44:27,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 02:44:27,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 02:44:27,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 02:44:27,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 02:44:27,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 02:44:27,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 02:44:27,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 02:44:27,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 02:44:27,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 02:44:27,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 02:44:27,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 02:44:27,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 02:44:27,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 02:44:27,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 02:44:27,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 02:44:27,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 02:44:27,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 02:44:27,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 02:44:27,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 02:44:27,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 02:44:27,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 02:44:27,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 02:44:27,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 02:44:27,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 02:44:27,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 02:44:27,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 02:44:27,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 02:44:27,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-RepeatedSemanticLbe.epf [2022-12-13 02:44:27,438 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 02:44:27,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 02:44:27,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 02:44:27,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 02:44:27,441 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 02:44:27,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 02:44:27,441 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 02:44:27,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 02:44:27,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 02:44:27,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 02:44:27,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 02:44:27,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 02:44:27,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 02:44:27,443 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 02:44:27,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 02:44:27,443 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 02:44:27,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 02:44:27,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 02:44:27,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 02:44:27,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-13 02:44:27,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 02:44:27,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 02:44:27,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 02:44:27,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 02:44:27,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 02:44:27,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 02:44:27,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 02:44:27,444 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-13 02:44:27,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-13 02:44:27,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 02:44:27,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 02:44:27,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 02:44:27,731 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 02:44:27,735 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 02:44:27,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-12.i [2022-12-13 02:44:28,883 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 02:44:29,156 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 02:44:29,157 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-12.i [2022-12-13 02:44:29,169 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c07bb9120/e577aa7f66ff4150acd5406b8cb932cb/FLAG078788f0b [2022-12-13 02:44:29,180 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c07bb9120/e577aa7f66ff4150acd5406b8cb932cb [2022-12-13 02:44:29,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 02:44:29,183 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-13 02:44:29,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 02:44:29,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 02:44:29,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 02:44:29,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ef5a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29, skipping insertion in model container [2022-12-13 02:44:29,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 02:44:29,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 02:44:29,468 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-12.i[30241,30254] [2022-12-13 02:44:29,477 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,478 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,481 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,482 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,486 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,486 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,486 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,487 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,490 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,491 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 02:44:29,500 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 02:44:29,538 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-12.i[30241,30254] [2022-12-13 02:44:29,539 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,539 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,541 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,541 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,545 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,546 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,546 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,546 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,548 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,549 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 02:44:29,582 INFO L208 MainTranslator]: Completed translation [2022-12-13 02:44:29,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29 WrapperNode [2022-12-13 02:44:29,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 02:44:29,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 02:44:29,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 02:44:29,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 02:44:29,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,623 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 02:44:29,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 02:44:29,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 02:44:29,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 02:44:29,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 02:44:29,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,656 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 02:44:29,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 02:44:29,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 02:44:29,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 02:44:29,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (1/1) ... [2022-12-13 02:44:29,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 02:44:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:29,756 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) [2022-12-13 02:44:29,764 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 [2022-12-13 02:44:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 02:44:29,793 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 02:44:29,793 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 02:44:29,794 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 02:44:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 02:44:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 02:44:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 02:44:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 02:44:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 02:44:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 02:44:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 02:44:29,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 02:44:29,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 02:44:29,796 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-13 02:44:29,928 INFO L236 CfgBuilder]: Building ICFG [2022-12-13 02:44:29,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 02:44:30,117 INFO L277 CfgBuilder]: Performing block encoding [2022-12-13 02:44:30,123 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 02:44:30,124 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 02:44:30,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:30 BoogieIcfgContainer [2022-12-13 02:44:30,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 02:44:30,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 02:44:30,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 02:44:30,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 02:44:30,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:44:29" (1/3) ... [2022-12-13 02:44:30,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cf9726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:44:30, skipping insertion in model container [2022-12-13 02:44:30,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29" (2/3) ... [2022-12-13 02:44:30,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cf9726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:44:30, skipping insertion in model container [2022-12-13 02:44:30,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:30" (3/3) ... [2022-12-13 02:44:30,135 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2022-12-13 02:44:30,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 02:44:30,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 02:44:30,152 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 02:44:30,225 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 02:44:30,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-13 02:44:30,311 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-13 02:44:30,311 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 02:44:30,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2022-12-13 02:44:30,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-13 02:44:30,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-13 02:44:30,324 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:30,344 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-13 02:44:30,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 91 transitions, 188 flow [2022-12-13 02:44:30,370 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-13 02:44:30,370 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 02:44:30,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2022-12-13 02:44:30,374 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-13 02:44:30,374 INFO L226 LiptonReduction]: Number of co-enabled transitions 1914 [2022-12-13 02:44:32,921 INFO L241 LiptonReduction]: Total number of compositions: 79 [2022-12-13 02:44:32,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 02:44:32,952 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=false, mAutomataTypeConcurrency=REPEATED_LIPTON_PN, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@78f283c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-13 02:44:32,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 02:44:32,974 INFO L130 PetriNetUnfolder]: 3/26 cut-off events. [2022-12-13 02:44:32,974 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 02:44:32,974 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:32,975 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 02:44:32,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 02:44:32,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1807783243, now seen corresponding path program 1 times [2022-12-13 02:44:32,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:32,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780897018] [2022-12-13 02:44:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:32,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:33,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780897018] [2022-12-13 02:44:33,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780897018] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 02:44:33,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 02:44:33,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 02:44:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718415267] [2022-12-13 02:44:33,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 02:44:33,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 02:44:33,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:33,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 02:44:33,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 02:44:33,319 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-13 02:44:33,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-12-13 02:44:33,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:33,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-13 02:44:33,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 02:44:33,471 INFO L130 PetriNetUnfolder]: 657/1007 cut-off events. [2022-12-13 02:44:33,472 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 02:44:33,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 1007 events. 657/1007 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4231 event pairs, 175 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 2013. Up to 641 conditions per place. [2022-12-13 02:44:33,482 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 38 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2022-12-13 02:44:33,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 178 flow [2022-12-13 02:44:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 02:44:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 02:44:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-12-13 02:44:33,492 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2022-12-13 02:44:33,498 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2022-12-13 02:44:33,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 45 transitions, 178 flow [2022-12-13 02:44:33,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 44 transitions, 174 flow [2022-12-13 02:44:33,507 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 02:44:33,508 INFO L89 Accepts]: Start accepts. Operand has 33 places, 44 transitions, 174 flow [2022-12-13 02:44:33,510 INFO L95 Accepts]: Finished accepts. [2022-12-13 02:44:33,510 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:33,510 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 33 places, 44 transitions, 174 flow [2022-12-13 02:44:33,519 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 33 places, 44 transitions, 174 flow [2022-12-13 02:44:33,519 INFO L226 LiptonReduction]: Number of co-enabled transitions 176 [2022-12-13 02:44:33,521 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 02:44:33,522 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 15 [2022-12-13 02:44:33,522 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 44 transitions, 174 flow [2022-12-13 02:44:33,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-12-13 02:44:33,523 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:33,523 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 02:44:33,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 02:44:33,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 02:44:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash 206704716, now seen corresponding path program 1 times [2022-12-13 02:44:33,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:33,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820335821] [2022-12-13 02:44:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:33,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:33,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:33,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820335821] [2022-12-13 02:44:33,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820335821] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 02:44:33,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220222069] [2022-12-13 02:44:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:33,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:33,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:33,625 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) [2022-12-13 02:44:33,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 02:44:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 02:44:33,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 02:44:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:33,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 02:44:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:33,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220222069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 02:44:33,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 02:44:33,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 02:44:33,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126153669] [2022-12-13 02:44:33,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 02:44:33,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 02:44:33,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:33,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 02:44:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 02:44:33,767 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 02:44:33,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 44 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2022-12-13 02:44:33,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:33,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 02:44:33,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 02:44:33,960 INFO L130 PetriNetUnfolder]: 913/1399 cut-off events. [2022-12-13 02:44:33,960 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 02:44:33,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4178 conditions, 1399 events. 913/1399 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5992 event pairs, 175 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 4165. Up to 1025 conditions per place. [2022-12-13 02:44:33,967 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 86 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-12-13 02:44:33,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 02:44:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 02:44:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2022-12-13 02:44:33,970 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2022-12-13 02:44:33,971 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2022-12-13 02:44:33,971 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,986 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 02:44:33,987 INFO L89 Accepts]: Start accepts. Operand has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,988 INFO L95 Accepts]: Finished accepts. [2022-12-13 02:44:33,988 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:33,988 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,993 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,993 INFO L226 LiptonReduction]: Number of co-enabled transitions 392 [2022-12-13 02:44:33,994 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 02:44:33,996 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 10 [2022-12-13 02:44:33,996 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2022-12-13 02:44:33,996 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:33,997 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 02:44:34,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 02:44:34,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:34,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 02:44:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:34,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1043870325, now seen corresponding path program 2 times [2022-12-13 02:44:34,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:34,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400676916] [2022-12-13 02:44:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:34,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:34,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400676916] [2022-12-13 02:44:34,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400676916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 02:44:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544712101] [2022-12-13 02:44:34,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 02:44:34,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:34,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:34,341 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) [2022-12-13 02:44:34,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 02:44:34,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 02:44:34,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 02:44:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 02:44:34,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 02:44:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:34,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 02:44:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:34,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544712101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 02:44:34,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 02:44:34,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 02:44:34,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800187653] [2022-12-13 02:44:34,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 02:44:34,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 02:44:34,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 02:44:34,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 02:44:34,483 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 02:44:34,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 95 transitions, 560 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 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) [2022-12-13 02:44:34,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:34,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 02:44:34,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 02:44:34,905 INFO L130 PetriNetUnfolder]: 1681/2556 cut-off events. [2022-12-13 02:44:34,905 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 02:44:34,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10170 conditions, 2556 events. 1681/2556 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 11035 event pairs, 175 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 10154. Up to 2177 conditions per place. [2022-12-13 02:44:34,922 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 182 selfloop transitions, 11 changer transitions 0/197 dead transitions. [2022-12-13 02:44:34,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 02:44:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 02:44:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2022-12-13 02:44:34,926 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7623456790123457 [2022-12-13 02:44:34,927 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2022-12-13 02:44:34,927 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,944 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,961 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 02:44:34,961 INFO L89 Accepts]: Start accepts. Operand has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,962 INFO L95 Accepts]: Finished accepts. [2022-12-13 02:44:34,963 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:34,963 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,970 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,971 INFO L226 LiptonReduction]: Number of co-enabled transitions 824 [2022-12-13 02:44:34,973 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 02:44:34,974 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 13 [2022-12-13 02:44:34,974 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 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) [2022-12-13 02:44:34,975 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:34,977 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 02:44:34,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 02:44:35,182 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,SelfDestructingSolverStorable2 [2022-12-13 02:44:35,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 02:44:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2052466155, now seen corresponding path program 3 times [2022-12-13 02:44:35,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:35,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738227437] [2022-12-13 02:44:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:35,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:35,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:35,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738227437] [2022-12-13 02:44:35,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738227437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 02:44:35,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988986] [2022-12-13 02:44:35,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 02:44:35,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:35,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:35,360 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) [2022-12-13 02:44:35,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 02:44:35,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 02:44:35,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 02:44:35,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 02:44:35,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 02:44:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:35,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 02:44:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:35,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 02:44:35,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 02:44:35,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 02:44:35,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183437436] [2022-12-13 02:44:35,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 02:44:35,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 02:44:35,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:35,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 02:44:35,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 02:44:35,650 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 02:44:35,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 197 transitions, 1558 flow. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 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) [2022-12-13 02:44:35,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:35,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 02:44:35,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 02:44:36,364 INFO L130 PetriNetUnfolder]: 3217/4860 cut-off events. [2022-12-13 02:44:36,364 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 02:44:36,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24221 conditions, 4860 events. 3217/4860 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 21030 event pairs, 175 based on Foata normal form. 0/2384 useless extension candidates. Maximal degree in co-relation 24202. Up to 4481 conditions per place. [2022-12-13 02:44:36,392 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 374 selfloop transitions, 23 changer transitions 0/401 dead transitions. [2022-12-13 02:44:36,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:36,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 02:44:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 02:44:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 505 transitions. [2022-12-13 02:44:36,394 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.779320987654321 [2022-12-13 02:44:36,394 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2022-12-13 02:44:36,394 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:36,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:36,459 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 02:44:36,459 INFO L89 Accepts]: Start accepts. Operand has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:36,461 INFO L95 Accepts]: Finished accepts. [2022-12-13 02:44:36,461 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:36,461 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:36,482 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:36,483 INFO L226 LiptonReduction]: Number of co-enabled transitions 1688 [2022-12-13 02:44:36,484 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 02:44:36,485 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 26 [2022-12-13 02:44:36,485 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:36,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 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) [2022-12-13 02:44:36,485 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:36,486 INFO L214 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 02:44:36,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 02:44:36,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:36,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 02:44:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash -637174101, now seen corresponding path program 4 times [2022-12-13 02:44:36,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:36,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607647993] [2022-12-13 02:44:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:36,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:37,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:37,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607647993] [2022-12-13 02:44:37,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607647993] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 02:44:37,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280956883] [2022-12-13 02:44:37,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 02:44:37,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:37,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:37,064 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) [2022-12-13 02:44:37,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 02:44:37,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 02:44:37,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 02:44:37,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 02:44:37,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 02:44:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:37,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 02:44:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:37,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280956883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 02:44:37,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 02:44:37,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 28 [2022-12-13 02:44:37,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439851173] [2022-12-13 02:44:37,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 02:44:37,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 02:44:37,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:37,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 02:44:37,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-12-13 02:44:37,499 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 02:44:37,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 401 transitions, 3984 flow. Second operand has 29 states, 29 states have (on average 5.206896551724138) internal successors, (151), 29 states have internal predecessors, (151), 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) [2022-12-13 02:44:37,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:37,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 02:44:37,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 02:44:38,283 INFO L130 PetriNetUnfolder]: 3729/5628 cut-off events. [2022-12-13 02:44:38,283 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 02:44:38,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33664 conditions, 5628 events. 3729/5628 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 24369 event pairs, 175 based on Foata normal form. 0/2768 useless extension candidates. Maximal degree in co-relation 33642. Up to 5249 conditions per place. [2022-12-13 02:44:38,308 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 438 selfloop transitions, 27 changer transitions 0/469 dead transitions. [2022-12-13 02:44:38,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 469 transitions, 5594 flow [2022-12-13 02:44:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 02:44:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 02:44:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 581 transitions. [2022-12-13 02:44:38,310 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7685185185185185 [2022-12-13 02:44:38,310 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 67 predicate places. [2022-12-13 02:44:38,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 469 transitions, 5594 flow [2022-12-13 02:44:38,332 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 469 transitions, 5594 flow [2022-12-13 02:44:38,378 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 02:44:38,378 INFO L89 Accepts]: Start accepts. Operand has 99 places, 469 transitions, 5594 flow [2022-12-13 02:44:38,380 INFO L95 Accepts]: Finished accepts. [2022-12-13 02:44:38,380 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:38,380 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 469 transitions, 5594 flow [2022-12-13 02:44:38,407 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 469 transitions, 5594 flow [2022-12-13 02:44:38,407 INFO L226 LiptonReduction]: Number of co-enabled transitions 1976 [2022-12-13 02:44:38,409 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 02:44:38,410 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 32 [2022-12-13 02:44:38,410 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 469 transitions, 5594 flow [2022-12-13 02:44:38,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.206896551724138) internal successors, (151), 29 states have internal predecessors, (151), 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) [2022-12-13 02:44:38,410 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:38,410 INFO L214 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2022-12-13 02:44:38,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 02:44:38,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:38,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 02:44:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:38,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1186531051, now seen corresponding path program 5 times [2022-12-13 02:44:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:38,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949267590] [2022-12-13 02:44:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:38,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:39,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:39,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949267590] [2022-12-13 02:44:39,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949267590] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 02:44:39,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478831656] [2022-12-13 02:44:39,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 02:44:39,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:39,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:39,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 02:44:39,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 02:44:39,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 02:44:39,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 02:44:39,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 02:44:39,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 02:44:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:41,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 02:44:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:42,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478831656] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 02:44:42,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 02:44:42,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-13 02:44:42,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060146133] [2022-12-13 02:44:42,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 02:44:42,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 02:44:42,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:42,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 02:44:42,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=5584, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 02:44:42,651 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 02:44:42,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 469 transitions, 5594 flow. Second operand has 83 states, 83 states have (on average 5.156626506024097) internal successors, (428), 83 states have internal predecessors, (428), 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) [2022-12-13 02:44:42,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:42,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 02:44:42,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand