/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 --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-13 05:52:37,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 05:52:37,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 05:52:37,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 05:52:37,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 05:52:37,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 05:52:37,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 05:52:37,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 05:52:37,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 05:52:37,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 05:52:37,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 05:52:37,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 05:52:37,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 05:52:37,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 05:52:37,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 05:52:37,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 05:52:37,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 05:52:37,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 05:52:37,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 05:52:37,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 05:52:37,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 05:52:37,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 05:52:37,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 05:52:37,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 05:52:37,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 05:52:37,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 05:52:37,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 05:52:37,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 05:52:37,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 05:52:37,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 05:52:37,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 05:52:37,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 05:52:37,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 05:52:37,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 05:52:37,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 05:52:37,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 05:52:37,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 05:52:37,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 05:52:37,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 05:52:37,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 05:52:37,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 05:52:37,727 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 05:52:37,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 05:52:37,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 05:52:37,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 05:52:37,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 05:52:37,761 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 05:52:37,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 05:52:37,762 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 05:52:37,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 05:52:37,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 05:52:37,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 05:52:37,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 05:52:37,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 05:52:37,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 05:52:37,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 05:52:37,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 05:52:37,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 05:52:37,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 05:52:37,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 05:52:37,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 05:52:37,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-13 05:52:37,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 05:52:37,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 05:52:37,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 05:52:37,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 05:52:37,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 05:52:37,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 05:52:37,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 05:52:37,765 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-13 05:52:37,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-13 05:52:38,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 05:52:38,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 05:52:38,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 05:52:38,145 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 05:52:38,145 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 05:52:38,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-10.i [2022-12-13 05:52:39,363 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 05:52:39,596 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 05:52:39,596 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-10.i [2022-12-13 05:52:39,609 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b76335b/4d404ebc9155439bbf4e12b52fc0d99f/FLAG20871f161 [2022-12-13 05:52:39,629 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b76335b/4d404ebc9155439bbf4e12b52fc0d99f [2022-12-13 05:52:39,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 05:52:39,632 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-13 05:52:39,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 05:52:39,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 05:52:39,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 05:52:39,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:52:39" (1/1) ... [2022-12-13 05:52:39,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145e29a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:39, skipping insertion in model container [2022-12-13 05:52:39,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:52:39" (1/1) ... [2022-12-13 05:52:39,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 05:52:39,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 05:52:40,003 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-10.i[30241,30254] [2022-12-13 05:52:40,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 05:52:40,012 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 05:52:40,016 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 05:52:40,017 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 05:52:40,022 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 05:52:40,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 05:52:40,023 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 05:52:40,024 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 05:52:40,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 05:52:40,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 05:52:40,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 05:52:40,040 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 05:52:40,073 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-10.i[30241,30254] [2022-12-13 05:52:40,074 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 05:52:40,074 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 05:52:40,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 05:52:40,077 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 05:52:40,080 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 05:52:40,080 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 05:52:40,080 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 05:52:40,081 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 05:52:40,082 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 05:52:40,083 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 05:52:40,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 05:52:40,118 INFO L208 MainTranslator]: Completed translation [2022-12-13 05:52:40,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40 WrapperNode [2022-12-13 05:52:40,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 05:52:40,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 05:52:40,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 05:52:40,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 05:52:40,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,177 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 05:52:40,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 05:52:40,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 05:52:40,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 05:52:40,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 05:52:40,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 05:52:40,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 05:52:40,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 05:52:40,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 05:52:40,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (1/1) ... [2022-12-13 05:52:40,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 05:52:40,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 05:52:40,257 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 05:52:40,258 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 05:52:40,284 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 05:52:40,285 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 05:52:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 05:52:40,285 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 05:52:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 05:52:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 05:52:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 05:52:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 05:52:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 05:52:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 05:52:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 05:52:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 05:52:40,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 05:52:40,287 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 05:52:40,424 INFO L236 CfgBuilder]: Building ICFG [2022-12-13 05:52:40,426 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 05:52:40,628 INFO L277 CfgBuilder]: Performing block encoding [2022-12-13 05:52:40,634 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 05:52:40,634 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 05:52:40,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:52:40 BoogieIcfgContainer [2022-12-13 05:52:40,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 05:52:40,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 05:52:40,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 05:52:40,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 05:52:40,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:52:39" (1/3) ... [2022-12-13 05:52:40,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ff8073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:52:40, skipping insertion in model container [2022-12-13 05:52:40,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:52:40" (2/3) ... [2022-12-13 05:52:40,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ff8073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:52:40, skipping insertion in model container [2022-12-13 05:52:40,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:52:40" (3/3) ... [2022-12-13 05:52:40,644 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2022-12-13 05:52:40,663 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 05:52:40,663 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 05:52:40,663 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 05:52:40,753 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 05:52:40,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-13 05:52:40,869 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-13 05:52:40,870 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 05:52:40,876 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 05:52:40,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-13 05:52:40,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-13 05:52:40,883 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 05:52:40,905 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-13 05:52:40,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 91 transitions, 188 flow [2022-12-13 05:52:40,950 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-13 05:52:40,950 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 05:52:40,952 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 05:52:40,956 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-13 05:52:40,956 INFO L226 LiptonReduction]: Number of co-enabled transitions 1914 [2022-12-13 05:52:44,309 INFO L241 LiptonReduction]: Total number of compositions: 79 [2022-12-13 05:52:44,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 05:52:44,326 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;@36b69b8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-13 05:52:44,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 05:52:44,330 INFO L130 PetriNetUnfolder]: 3/26 cut-off events. [2022-12-13 05:52:44,330 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 05:52:44,330 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 05:52:44,331 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 05:52:44,331 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 05:52:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 05:52:44,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1807783243, now seen corresponding path program 1 times [2022-12-13 05:52:44,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 05:52:44,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843683879] [2022-12-13 05:52:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 05:52:44,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 05:52:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 05:52:44,586 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 05:52:44,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 05:52:44,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843683879] [2022-12-13 05:52:44,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843683879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 05:52:44,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 05:52:44,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 05:52:44,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912254670] [2022-12-13 05:52:44,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 05:52:44,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 05:52:44,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 05:52:44,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 05:52:44,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 05:52:44,618 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-13 05:52:44,619 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 05:52:44,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 05:52:44,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-13 05:52:44,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 05:52:44,795 INFO L130 PetriNetUnfolder]: 657/1007 cut-off events. [2022-12-13 05:52:44,795 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 05:52:44,798 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 05:52:44,804 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 38 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2022-12-13 05:52:44,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 178 flow [2022-12-13 05:52:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 05:52:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 05:52:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-12-13 05:52:44,816 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2022-12-13 05:52:44,820 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2022-12-13 05:52:44,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 45 transitions, 178 flow [2022-12-13 05:52:44,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 44 transitions, 174 flow [2022-12-13 05:52:44,831 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 05:52:44,832 INFO L89 Accepts]: Start accepts. Operand has 33 places, 44 transitions, 174 flow [2022-12-13 05:52:44,835 INFO L95 Accepts]: Finished accepts. [2022-12-13 05:52:44,835 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 05:52:44,835 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 33 places, 44 transitions, 174 flow [2022-12-13 05:52:44,840 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 33 places, 44 transitions, 174 flow [2022-12-13 05:52:44,841 INFO L226 LiptonReduction]: Number of co-enabled transitions 176 [2022-12-13 05:52:44,842 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 05:52:44,844 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 13 [2022-12-13 05:52:44,845 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 44 transitions, 174 flow [2022-12-13 05:52:44,845 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 05:52:44,845 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 05:52:44,846 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 05:52:44,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 05:52:44,852 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 05:52:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 05:52:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash 206704716, now seen corresponding path program 1 times [2022-12-13 05:52:44,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 05:52:44,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486929843] [2022-12-13 05:52:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 05:52:44,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 05:52:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 05:52:44,938 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 05:52:44,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 05:52:44,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486929843] [2022-12-13 05:52:44,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486929843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 05:52:44,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520036210] [2022-12-13 05:52:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 05:52:44,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 05:52:44,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 05:52:44,943 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 05:52:44,949 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 05:52:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 05:52:45,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 05:52:45,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 05:52:45,105 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 05:52:45,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 05:52:45,120 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 05:52:45,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520036210] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 05:52:45,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 05:52:45,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 05:52:45,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214122019] [2022-12-13 05:52:45,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 05:52:45,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 05:52:45,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 05:52:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 05:52:45,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 05:52:45,123 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 05:52:45,123 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 05:52:45,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 05:52:45,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 05:52:45,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 05:52:45,355 INFO L130 PetriNetUnfolder]: 913/1399 cut-off events. [2022-12-13 05:52:45,355 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 05:52:45,357 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 05:52:45,365 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 86 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-12-13 05:52:45,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 95 transitions, 560 flow [2022-12-13 05:52:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 05:52:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 05:52:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2022-12-13 05:52:45,367 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2022-12-13 05:52:45,368 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2022-12-13 05:52:45,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 95 transitions, 560 flow [2022-12-13 05:52:45,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 95 transitions, 560 flow [2022-12-13 05:52:45,386 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 05:52:45,387 INFO L89 Accepts]: Start accepts. Operand has 38 places, 95 transitions, 560 flow [2022-12-13 05:52:45,387 INFO L95 Accepts]: Finished accepts. [2022-12-13 05:52:45,388 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 05:52:45,388 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 95 transitions, 560 flow [2022-12-13 05:52:45,391 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 95 transitions, 560 flow [2022-12-13 05:52:45,391 INFO L226 LiptonReduction]: Number of co-enabled transitions 392 [2022-12-13 05:52:45,392 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 05:52:45,393 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 7 [2022-12-13 05:52:45,393 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 95 transitions, 560 flow [2022-12-13 05:52:45,393 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 05:52:45,393 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 05:52:45,394 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 05:52:45,403 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 05:52:45,600 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 05:52:45,600 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 05:52:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 05:52:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1043870325, now seen corresponding path program 2 times [2022-12-13 05:52:45,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 05:52:45,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823143722] [2022-12-13 05:52:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 05:52:45,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 05:52:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 05:52:45,718 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 05:52:45,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 05:52:45,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823143722] [2022-12-13 05:52:45,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823143722] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 05:52:45,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458669101] [2022-12-13 05:52:45,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 05:52:45,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 05:52:45,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 05:52:45,724 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 05:52:45,746 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 05:52:45,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 05:52:45,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 05:52:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 05:52:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 05:52:45,821 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 05:52:45,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 05:52:45,877 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 05:52:45,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458669101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 05:52:45,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 05:52:45,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 05:52:45,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517967339] [2022-12-13 05:52:45,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 05:52:45,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 05:52:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 05:52:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 05:52:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 05:52:45,879 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 05:52:45,879 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 05:52:45,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 05:52:45,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 05:52:45,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 05:52:46,309 INFO L130 PetriNetUnfolder]: 1681/2556 cut-off events. [2022-12-13 05:52:46,310 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 05:52:46,313 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 05:52:46,330 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 182 selfloop transitions, 11 changer transitions 0/197 dead transitions. [2022-12-13 05:52:46,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 197 transitions, 1558 flow [2022-12-13 05:52:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 05:52:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 05:52:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2022-12-13 05:52:46,336 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7623456790123457 [2022-12-13 05:52:46,337 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2022-12-13 05:52:46,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 197 transitions, 1558 flow [2022-12-13 05:52:46,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 197 transitions, 1558 flow [2022-12-13 05:52:46,379 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 05:52:46,380 INFO L89 Accepts]: Start accepts. Operand has 49 places, 197 transitions, 1558 flow [2022-12-13 05:52:46,381 INFO L95 Accepts]: Finished accepts. [2022-12-13 05:52:46,381 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 05:52:46,382 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 197 transitions, 1558 flow [2022-12-13 05:52:46,392 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 49 places, 197 transitions, 1558 flow [2022-12-13 05:52:46,392 INFO L226 LiptonReduction]: Number of co-enabled transitions 824 [2022-12-13 05:52:46,394 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 05:52:46,396 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 17 [2022-12-13 05:52:46,396 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 197 transitions, 1558 flow [2022-12-13 05:52:46,396 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 05:52:46,399 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 05:52:46,399 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 05:52:46,410 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 05:52:46,606 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 05:52:46,606 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 05:52:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 05:52:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2052466155, now seen corresponding path program 3 times [2022-12-13 05:52:46,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 05:52:46,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698632852] [2022-12-13 05:52:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 05:52:46,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 05:52:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 05:52:46,804 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 05:52:46,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 05:52:46,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698632852] [2022-12-13 05:52:46,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698632852] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 05:52:46,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581844207] [2022-12-13 05:52:46,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 05:52:46,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 05:52:46,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 05:52:46,809 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 05:52:46,835 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 05:52:46,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 05:52:46,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 05:52:46,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 05:52:46,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 05:52:46,951 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 05:52:46,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 05:52:47,125 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 05:52:47,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581844207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 05:52:47,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 05:52:47,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-13 05:52:47,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766066407] [2022-12-13 05:52:47,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 05:52:47,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 05:52:47,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 05:52:47,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 05:52:47,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 05:52:47,127 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 05:52:47,128 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 05:52:47,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 05:52:47,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 05:52:47,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 05:52:47,975 INFO L130 PetriNetUnfolder]: 3217/4860 cut-off events. [2022-12-13 05:52:47,975 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 05:52:47,980 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 05:52:48,020 INFO L137 encePairwiseOnDemand]: 24/27 looper letters, 374 selfloop transitions, 23 changer transitions 0/401 dead transitions. [2022-12-13 05:52:48,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 401 transitions, 3984 flow [2022-12-13 05:52:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 05:52:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 05:52:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 505 transitions. [2022-12-13 05:52:48,022 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.779320987654321 [2022-12-13 05:52:48,024 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2022-12-13 05:52:48,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 401 transitions, 3984 flow [2022-12-13 05:52:48,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 401 transitions, 3984 flow [2022-12-13 05:52:48,107 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 05:52:48,108 INFO L89 Accepts]: Start accepts. Operand has 72 places, 401 transitions, 3984 flow [2022-12-13 05:52:48,112 INFO L95 Accepts]: Finished accepts. [2022-12-13 05:52:48,113 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 05:52:48,113 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 401 transitions, 3984 flow [2022-12-13 05:52:48,143 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 401 transitions, 3984 flow [2022-12-13 05:52:48,143 INFO L226 LiptonReduction]: Number of co-enabled transitions 1688 [2022-12-13 05:52:48,147 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 05:52:48,148 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 41 [2022-12-13 05:52:48,148 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 401 transitions, 3984 flow [2022-12-13 05:52:48,148 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 05:52:48,148 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 05:52:48,149 INFO L214 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 05:52:48,162 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 05:52:48,355 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 05:52:48,356 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 05:52:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 05:52:48,356 INFO L85 PathProgramCache]: Analyzing trace with hash -637174101, now seen corresponding path program 4 times [2022-12-13 05:52:48,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 05:52:48,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817572515] [2022-12-13 05:52:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 05:52:48,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 05:52:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 05:52:49,802 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 05:52:49,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 05:52:49,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817572515] [2022-12-13 05:52:49,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817572515] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 05:52:49,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844376819] [2022-12-13 05:52:49,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 05:52:49,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 05:52:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 05:52:49,805 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 05:52:49,807 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 05:52:49,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 05:52:49,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 05:52:49,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-13 05:52:49,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 05:52:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 05:52:51,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 05:52:52,404 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 05:52:52,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844376819] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 05:52:52,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 05:52:52,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2022-12-13 05:52:52,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576324823] [2022-12-13 05:52:52,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 05:52:52,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 05:52:52,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 05:52:52,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 05:52:52,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=4066, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 05:52:52,408 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2022-12-13 05:52:52,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 401 transitions, 3984 flow. Second operand has 71 states, 71 states have (on average 5.183098591549296) internal successors, (368), 71 states have internal predecessors, (368), 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 05:52:52,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 05:52:52,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2022-12-13 05:52:52,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand