/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-11.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-13 02:44:27,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 02:44:27,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 02:44:27,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 02:44:27,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 02:44:27,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 02:44:27,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 02:44:27,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 02:44:27,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 02:44:27,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 02:44:27,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 02:44:27,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 02:44:27,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 02:44:27,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 02:44:27,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 02:44:27,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 02:44:27,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 02:44:27,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 02:44:27,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 02:44:27,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 02:44:27,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 02:44:27,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 02:44:27,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 02:44:27,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 02:44:27,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 02:44:27,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 02:44:27,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 02:44:27,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 02:44:27,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 02:44:27,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 02:44:27,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 02:44:27,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 02:44:27,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 02:44:27,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 02:44:27,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 02:44:27,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 02:44:27,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 02:44:27,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 02:44:27,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 02:44:27,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 02:44:27,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 02:44:27,165 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 02:44:27,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 02:44:27,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 02:44:27,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 02:44:27,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 02:44:27,187 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 02:44:27,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 02:44:27,187 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 02:44:27,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 02:44:27,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 02:44:27,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 02:44:27,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 02:44:27,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 02:44:27,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 02:44:27,188 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 02:44:27,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 02:44:27,189 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 02:44:27,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 02:44:27,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 02:44:27,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 02:44:27,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-13 02:44:27,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 02:44:27,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 02:44:27,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 02:44:27,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 02:44:27,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 02:44:27,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 02:44:27,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 02:44:27,190 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-13 02:44:27,190 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-13 02:44:27,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 02:44:27,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 02:44:27,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 02:44:27,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 02:44:27,467 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 02:44:27,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-11.i [2022-12-13 02:44:28,424 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 02:44:28,706 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 02:44:28,707 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-11.i [2022-12-13 02:44:28,720 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68f910c79/499d9ac0f25645218dc7525b25618c3c/FLAGbadf77ca6 [2022-12-13 02:44:28,730 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68f910c79/499d9ac0f25645218dc7525b25618c3c [2022-12-13 02:44:28,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 02:44:28,733 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-13 02:44:28,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 02:44:28,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 02:44:28,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 02:44:28,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:44:28" (1/1) ... [2022-12-13 02:44:28,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e706877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:28, skipping insertion in model container [2022-12-13 02:44:28,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:44:28" (1/1) ... [2022-12-13 02:44:28,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 02:44:28,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 02:44:29,003 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-11.i[30241,30254] [2022-12-13 02:44:29,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,014 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,015 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,018 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,019 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 02:44:29,034 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 02:44:29,071 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-11.i[30241,30254] [2022-12-13 02:44:29,072 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,073 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,073 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,073 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,076 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,077 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 02:44:29,077 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 02:44:29,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 02:44:29,107 INFO L208 MainTranslator]: Completed translation [2022-12-13 02:44:29,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:44:29 WrapperNode [2022-12-13 02:44:29,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 02:44:29,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 02:44:29,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 02:44:29,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 02:44:29,115 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 02:44:29,139 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 02:44:29,160 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 02:44:29,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 02:44:29,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 02:44:29,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 02:44:29,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 02:44:29,168 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 02:44:29,168 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 02:44:29,173 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 02:44:29,173 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 02:44:29,187 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 02:44:29,189 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 02:44:29,190 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 02:44:29,191 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 02:44:29,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 02:44:29,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 02:44:29,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 02:44:29,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 02:44:29,194 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 02:44:29,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 02:44:29,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:29,222 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 02:44:29,230 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 02:44:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 02:44:29,259 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 02:44:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 02:44:29,259 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 02:44:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 02:44:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 02:44:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 02:44:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 02:44:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 02:44:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 02:44:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 02:44:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 02:44:29,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 02:44:29,261 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 02:44:29,384 INFO L236 CfgBuilder]: Building ICFG [2022-12-13 02:44:29,386 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 02:44:29,508 INFO L277 CfgBuilder]: Performing block encoding [2022-12-13 02:44:29,513 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 02:44:29,513 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 02:44:29,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:29 BoogieIcfgContainer [2022-12-13 02:44:29,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 02:44:29,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 02:44:29,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 02:44:29,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 02:44:29,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:44:28" (1/3) ... [2022-12-13 02:44:29,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ad61a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:44:29, skipping insertion in model container [2022-12-13 02:44:29,520 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 02:44:29,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ad61a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:44:29, skipping insertion in model container [2022-12-13 02:44:29,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:44:29" (3/3) ... [2022-12-13 02:44:29,521 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2022-12-13 02:44:29,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 02:44:29,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 02:44:29,540 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 02:44:29,611 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 02:44:29,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-13 02:44:29,703 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-13 02:44:29,703 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 02:44:29,708 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 02:44:29,708 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-13 02:44:29,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-13 02:44:29,714 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:29,738 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-13 02:44:29,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 91 transitions, 188 flow [2022-12-13 02:44:29,773 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-13 02:44:29,774 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 02:44:29,775 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 02:44:29,779 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-13 02:44:29,779 INFO L226 LiptonReduction]: Number of co-enabled transitions 1914 [2022-12-13 02:44:32,684 INFO L241 LiptonReduction]: Total number of compositions: 79 [2022-12-13 02:44:32,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 02:44:32,699 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;@1a5503f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-13 02:44:32,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 02:44:32,702 INFO L130 PetriNetUnfolder]: 3/26 cut-off events. [2022-12-13 02:44:32,702 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 02:44:32,702 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:32,703 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 02:44:32,703 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 02:44:32,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:32,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1807783243, now seen corresponding path program 1 times [2022-12-13 02:44:32,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:32,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893589747] [2022-12-13 02:44:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:32,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:32,905 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 02:44:32,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:32,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893589747] [2022-12-13 02:44:32,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893589747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 02:44:32,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 02:44:32,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 02:44:32,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713460570] [2022-12-13 02:44:32,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 02:44:32,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 02:44:32,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 02:44:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 02:44:32,936 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-13 02:44:32,938 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 02:44:32,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:32,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-13 02:44:32,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 02:44:33,047 INFO L130 PetriNetUnfolder]: 657/1007 cut-off events. [2022-12-13 02:44:33,047 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 02:44:33,049 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 02:44:33,053 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 38 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2022-12-13 02:44:33,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 178 flow [2022-12-13 02:44:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 02:44:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 02:44:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-12-13 02:44:33,064 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2022-12-13 02:44:33,069 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2022-12-13 02:44:33,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 45 transitions, 178 flow [2022-12-13 02:44:33,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 44 transitions, 174 flow [2022-12-13 02:44:33,081 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 02:44:33,082 INFO L89 Accepts]: Start accepts. Operand has 33 places, 44 transitions, 174 flow [2022-12-13 02:44:33,084 INFO L95 Accepts]: Finished accepts. [2022-12-13 02:44:33,085 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:33,085 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 33 places, 44 transitions, 174 flow [2022-12-13 02:44:33,094 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 33 places, 44 transitions, 174 flow [2022-12-13 02:44:33,095 INFO L226 LiptonReduction]: Number of co-enabled transitions 176 [2022-12-13 02:44:33,096 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 02:44:33,098 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 17 [2022-12-13 02:44:33,098 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 44 transitions, 174 flow [2022-12-13 02:44:33,098 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 02:44:33,099 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:33,099 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 02:44:33,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 02:44:33,103 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 02:44:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash 206704716, now seen corresponding path program 1 times [2022-12-13 02:44:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:33,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023835296] [2022-12-13 02:44:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:33,166 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 02:44:33,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:33,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023835296] [2022-12-13 02:44:33,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023835296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 02:44:33,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389039595] [2022-12-13 02:44:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:33,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:33,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:33,169 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 02:44:33,180 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 02:44:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:33,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 02:44:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 02:44:33,266 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 02:44:33,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 02:44:33,278 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 02:44:33,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389039595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 02:44:33,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 02:44:33,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 02:44:33,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668477423] [2022-12-13 02:44:33,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 02:44:33,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 02:44:33,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 02:44:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 02:44:33,280 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 02:44:33,280 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 02:44:33,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:33,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 02:44:33,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 02:44:33,467 INFO L130 PetriNetUnfolder]: 913/1399 cut-off events. [2022-12-13 02:44:33,468 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 02:44:33,470 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 02:44:33,476 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 86 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-12-13 02:44:33,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 02:44:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 02:44:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2022-12-13 02:44:33,479 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2022-12-13 02:44:33,480 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2022-12-13 02:44:33,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,495 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 02:44:33,495 INFO L89 Accepts]: Start accepts. Operand has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,496 INFO L95 Accepts]: Finished accepts. [2022-12-13 02:44:33,497 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:33,497 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,501 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,502 INFO L226 LiptonReduction]: Number of co-enabled transitions 392 [2022-12-13 02:44:33,502 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 02:44:33,504 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 9 [2022-12-13 02:44:33,504 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 95 transitions, 560 flow [2022-12-13 02:44:33,504 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 02:44:33,504 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:33,505 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 02:44:33,514 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 02:44:33,710 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 02:44:33,710 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 02:44:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:33,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1043870325, now seen corresponding path program 2 times [2022-12-13 02:44:33,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:33,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247156487] [2022-12-13 02:44:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:33,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:33,789 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 02:44:33,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247156487] [2022-12-13 02:44:33,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247156487] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 02:44:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318169958] [2022-12-13 02:44:33,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 02:44:33,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:33,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:33,792 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 02:44:33,833 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 02:44:33,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 02:44:33,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 02:44:33,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 02:44:33,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 02:44:33,902 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 02:44:33,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 02:44:33,935 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 02:44:33,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318169958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 02:44:33,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 02:44:33,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 02:44:33,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459589345] [2022-12-13 02:44:33,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 02:44:33,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 02:44:33,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:33,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 02:44:33,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 02:44:33,937 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 02:44:33,937 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 02:44:33,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:33,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 02:44:33,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 02:44:34,322 INFO L130 PetriNetUnfolder]: 1681/2556 cut-off events. [2022-12-13 02:44:34,323 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 02:44:34,324 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 02:44:34,336 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 182 selfloop transitions, 11 changer transitions 0/197 dead transitions. [2022-12-13 02:44:34,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 02:44:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 02:44:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2022-12-13 02:44:34,338 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7623456790123457 [2022-12-13 02:44:34,338 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2022-12-13 02:44:34,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,363 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 02:44:34,363 INFO L89 Accepts]: Start accepts. Operand has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,364 INFO L95 Accepts]: Finished accepts. [2022-12-13 02:44:34,364 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:34,364 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,370 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,370 INFO L226 LiptonReduction]: Number of co-enabled transitions 824 [2022-12-13 02:44:34,372 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 02:44:34,372 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 9 [2022-12-13 02:44:34,372 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 197 transitions, 1558 flow [2022-12-13 02:44:34,373 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 02:44:34,373 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:34,373 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 02:44:34,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 02:44:34,578 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 02:44:34,578 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 02:44:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2052466155, now seen corresponding path program 3 times [2022-12-13 02:44:34,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:34,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376255874] [2022-12-13 02:44:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:34,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:34,727 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 02:44:34,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:34,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376255874] [2022-12-13 02:44:34,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376255874] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 02:44:34,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626118375] [2022-12-13 02:44:34,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 02:44:34,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:34,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:34,731 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 02:44:34,734 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 02:44:34,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 02:44:34,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 02:44:34,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 02:44:34,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 02:44:34,856 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 02:44:34,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 02:44:34,990 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 02:44:34,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626118375] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 02:44:34,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 02:44:34,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 02:44:34,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201630639] [2022-12-13 02:44:34,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 02:44:34,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 02:44:34,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:34,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 02:44:34,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 02:44:34,994 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 02:44:34,994 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 02:44:34,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:34,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 02:44:34,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 02:44:35,648 INFO L130 PetriNetUnfolder]: 3217/4860 cut-off events. [2022-12-13 02:44:35,648 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 02:44:35,653 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 02:44:35,683 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 374 selfloop transitions, 23 changer transitions 0/401 dead transitions. [2022-12-13 02:44:35,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 02:44:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 02:44:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 505 transitions. [2022-12-13 02:44:35,687 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.779320987654321 [2022-12-13 02:44:35,688 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2022-12-13 02:44:35,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:35,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:35,776 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 02:44:35,776 INFO L89 Accepts]: Start accepts. Operand has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:35,779 INFO L95 Accepts]: Finished accepts. [2022-12-13 02:44:35,779 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:35,779 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:35,799 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:35,799 INFO L226 LiptonReduction]: Number of co-enabled transitions 1688 [2022-12-13 02:44:35,803 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 02:44:35,804 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 29 [2022-12-13 02:44:35,804 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 401 transitions, 3984 flow [2022-12-13 02:44:35,804 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 02:44:35,804 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:35,804 INFO L214 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 02:44:35,810 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 02:44:36,011 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 02:44:36,011 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 02:44:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash -637174101, now seen corresponding path program 4 times [2022-12-13 02:44:36,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:36,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343708993] [2022-12-13 02:44:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:36,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:36,426 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 02:44:36,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343708993] [2022-12-13 02:44:36,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343708993] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 02:44:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312288688] [2022-12-13 02:44:36,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 02:44:36,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:36,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:36,428 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 02:44:36,430 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 02:44:36,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 02:44:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 02:44:36,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 02:44:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 02:44:36,566 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 02:44:36,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 02:44:36,824 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 02:44:36,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312288688] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 02:44:36,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 02:44:36,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-12-13 02:44:36,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366462909] [2022-12-13 02:44:36,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 02:44:36,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 02:44:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:36,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 02:44:36,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-13 02:44:36,828 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 02:44:36,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 401 transitions, 3984 flow. Second operand has 27 states, 27 states have (on average 5.222222222222222) internal successors, (141), 27 states have internal predecessors, (141), 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 02:44:36,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:36,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 02:44:36,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 02:44:37,722 INFO L130 PetriNetUnfolder]: 3473/5244 cut-off events. [2022-12-13 02:44:37,723 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 02:44:37,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31360 conditions, 5244 events. 3473/5244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 22705 event pairs, 175 based on Foata normal form. 0/2576 useless extension candidates. Maximal degree in co-relation 31338. Up to 4865 conditions per place. [2022-12-13 02:44:37,750 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 406 selfloop transitions, 25 changer transitions 0/435 dead transitions. [2022-12-13 02:44:37,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 435 transitions, 5186 flow [2022-12-13 02:44:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 02:44:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 02:44:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 537 transitions. [2022-12-13 02:44:37,752 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7649572649572649 [2022-12-13 02:44:37,754 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2022-12-13 02:44:37,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 435 transitions, 5186 flow [2022-12-13 02:44:37,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 435 transitions, 5186 flow [2022-12-13 02:44:37,826 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 02:44:37,826 INFO L89 Accepts]: Start accepts. Operand has 97 places, 435 transitions, 5186 flow [2022-12-13 02:44:37,829 INFO L95 Accepts]: Finished accepts. [2022-12-13 02:44:37,829 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 02:44:37,829 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 435 transitions, 5186 flow [2022-12-13 02:44:37,853 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 435 transitions, 5186 flow [2022-12-13 02:44:37,853 INFO L226 LiptonReduction]: Number of co-enabled transitions 1832 [2022-12-13 02:44:37,856 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 02:44:37,857 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 31 [2022-12-13 02:44:37,857 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 435 transitions, 5186 flow [2022-12-13 02:44:37,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.222222222222222) internal successors, (141), 27 states have internal predecessors, (141), 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 02:44:37,858 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 02:44:37,858 INFO L214 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-12-13 02:44:37,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 02:44:38,063 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 02:44:38,063 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 02:44:38,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 02:44:38,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1855981259, now seen corresponding path program 5 times [2022-12-13 02:44:38,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 02:44:38,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168129847] [2022-12-13 02:44:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 02:44:38,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 02:44:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 02:44:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:39,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 02:44:39,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168129847] [2022-12-13 02:44:39,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168129847] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 02:44:39,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104109469] [2022-12-13 02:44:39,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 02:44:39,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 02:44:39,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 02:44:39,230 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 02:44:39,243 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 02:44:39,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-12-13 02:44:39,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 02:44:39,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 02:44:39,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 02:44:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:40,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 02:44:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 02:44:41,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104109469] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 02:44:41,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 02:44:41,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-12-13 02:44:41,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349167497] [2022-12-13 02:44:41,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 02:44:41,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-13 02:44:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 02:44:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-13 02:44:41,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4795, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 02:44:41,507 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 02:44:41,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 435 transitions, 5186 flow. Second operand has 77 states, 77 states have (on average 5.1688311688311686) internal successors, (398), 77 states have internal predecessors, (398), 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 02:44:41,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 02:44:41,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 02:44:41,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand