/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 06:27:29,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 06:27:29,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 06:27:29,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 06:27:29,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 06:27:29,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 06:27:29,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 06:27:29,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 06:27:29,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 06:27:29,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 06:27:29,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 06:27:29,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 06:27:29,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 06:27:29,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 06:27:29,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 06:27:29,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 06:27:29,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 06:27:29,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 06:27:29,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 06:27:29,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 06:27:29,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 06:27:29,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 06:27:29,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 06:27:29,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 06:27:29,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 06:27:29,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 06:27:29,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 06:27:29,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 06:27:29,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 06:27:29,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 06:27:29,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 06:27:29,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 06:27:29,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 06:27:29,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 06:27:29,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 06:27:29,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 06:27:29,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 06:27:29,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 06:27:29,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 06:27:29,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 06:27:29,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 06:27:29,742 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-VariableLbe.epf [2023-01-28 06:27:29,767 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 06:27:29,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 06:27:29,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 06:27:29,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 06:27:29,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 06:27:29,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 06:27:29,769 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 06:27:29,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 06:27:29,770 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 06:27:29,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 06:27:29,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 06:27:29,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 06:27:29,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 06:27:29,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 06:27:29,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 06:27:29,771 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 06:27:29,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 06:27:29,771 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 06:27:29,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 06:27:29,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 06:27:29,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 06:27:29,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 06:27:29,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 06:27:29,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:27:29,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 06:27:29,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 06:27:29,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 06:27:29,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 06:27:29,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 06:27:29,773 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 06:27:29,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 06:27:29,773 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 06:27:29,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 06:27:30,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 06:27:30,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 06:27:30,009 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 06:27:30,010 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 06:27:30,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2023-01-28 06:27:31,166 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 06:27:31,400 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 06:27:31,401 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2023-01-28 06:27:31,422 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b70ec5ee6/5d4ce5944159477da4d0577de59dbe2c/FLAG64a770c9c [2023-01-28 06:27:31,438 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b70ec5ee6/5d4ce5944159477da4d0577de59dbe2c [2023-01-28 06:27:31,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 06:27:31,440 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 06:27:31,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 06:27:31,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 06:27:31,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 06:27:31,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23df9c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31, skipping insertion in model container [2023-01-28 06:27:31,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 06:27:31,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 06:27:31,763 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2023-01-28 06:27:31,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:27:31,773 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 06:27:31,810 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2023-01-28 06:27:31,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:27:31,846 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 06:27:31,846 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 06:27:31,852 INFO L208 MainTranslator]: Completed translation [2023-01-28 06:27:31,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31 WrapperNode [2023-01-28 06:27:31,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 06:27:31,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 06:27:31,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 06:27:31,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 06:27:31,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,901 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-01-28 06:27:31,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 06:27:31,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 06:27:31,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 06:27:31,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 06:27:31,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,932 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 06:27:31,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 06:27:31,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 06:27:31,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 06:27:31,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (1/1) ... [2023-01-28 06:27:31,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:27:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:27:31,965 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) [2023-01-28 06:27:31,986 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 [2023-01-28 06:27:32,000 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-28 06:27:32,000 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-28 06:27:32,000 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-28 06:27:32,000 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-28 06:27:32,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 06:27:32,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 06:27:32,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 06:27:32,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 06:27:32,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 06:27:32,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 06:27:32,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 06:27:32,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 06:27:32,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 06:27:32,002 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 06:27:32,157 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 06:27:32,161 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 06:27:32,257 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 06:27:32,262 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 06:27:32,262 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 06:27:32,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:27:32 BoogieIcfgContainer [2023-01-28 06:27:32,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 06:27:32,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 06:27:32,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 06:27:32,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 06:27:32,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 06:27:31" (1/3) ... [2023-01-28 06:27:32,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c28ad65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:27:32, skipping insertion in model container [2023-01-28 06:27:32,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:27:31" (2/3) ... [2023-01-28 06:27:32,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c28ad65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:27:32, skipping insertion in model container [2023-01-28 06:27:32,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:27:32" (3/3) ... [2023-01-28 06:27:32,270 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2023-01-28 06:27:32,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 06:27:32,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 06:27:32,285 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 06:27:32,332 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:27:32,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2023-01-28 06:27:32,395 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-01-28 06:27:32,395 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:27:32,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-01-28 06:27:32,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2023-01-28 06:27:32,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2023-01-28 06:27:32,405 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:27:32,412 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2023-01-28 06:27:32,414 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2023-01-28 06:27:32,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2023-01-28 06:27:32,430 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-01-28 06:27:32,430 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:27:32,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-01-28 06:27:32,432 INFO L119 LiptonReduction]: Number of co-enabled transitions 1078 [2023-01-28 06:27:34,264 INFO L134 LiptonReduction]: Checked pairs total: 999 [2023-01-28 06:27:34,265 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-01-28 06:27:34,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:27:34,283 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@406766d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:27:34,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 06:27:34,287 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-01-28 06:27:34,287 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:27:34,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:34,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-28 06:27:34,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:34,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash -776471266, now seen corresponding path program 1 times [2023-01-28 06:27:34,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:34,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601457663] [2023-01-28 06:27:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:34,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:34,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601457663] [2023-01-28 06:27:34,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601457663] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:27:34,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:27:34,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:27:34,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240778626] [2023-01-28 06:27:34,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:27:34,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 06:27:34,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 06:27:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 06:27:34,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:34,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 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) [2023-01-28 06:27:34,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:34,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:34,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:34,784 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2023-01-28 06:27:34,784 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:27:34,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-01-28 06:27:34,787 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-01-28 06:27:34,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-01-28 06:27:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 06:27:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 06:27:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 233 transitions. [2023-01-28 06:27:34,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46975806451612906 [2023-01-28 06:27:34,799 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 233 transitions. [2023-01-28 06:27:34,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 233 transitions. [2023-01-28 06:27:34,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:34,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 233 transitions. [2023-01-28 06:27:34,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 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) [2023-01-28 06:27:34,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 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) [2023-01-28 06:27:34,810 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 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) [2023-01-28 06:27:34,811 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 233 transitions. [2023-01-28 06:27:34,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-01-28 06:27:34,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:27:34,815 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-01-28 06:27:34,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-01-28 06:27:34,819 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-01-28 06:27:34,819 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-01-28 06:27:34,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 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) [2023-01-28 06:27:34,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:34,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:34,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 06:27:34,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:34,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1135033148, now seen corresponding path program 1 times [2023-01-28 06:27:34,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:34,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678517734] [2023-01-28 06:27:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:34,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:34,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:34,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678517734] [2023-01-28 06:27:34,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678517734] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:27:34,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:27:34,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:27:34,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332164194] [2023-01-28 06:27:34,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:27:34,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:27:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:34,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:27:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:27:34,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:34,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 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) [2023-01-28 06:27:34,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:34,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:34,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:35,050 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2023-01-28 06:27:35,050 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2023-01-28 06:27:35,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 654 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-01-28 06:27:35,052 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-01-28 06:27:35,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-01-28 06:27:35,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 06:27:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 06:27:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2023-01-28 06:27:35,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46236559139784944 [2023-01-28 06:27:35,056 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2023-01-28 06:27:35,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2023-01-28 06:27:35,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:35,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2023-01-28 06:27:35,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 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) [2023-01-28 06:27:35,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 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) [2023-01-28 06:27:35,061 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 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) [2023-01-28 06:27:35,061 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 344 transitions. [2023-01-28 06:27:35,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-01-28 06:27:35,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:27:35,063 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-01-28 06:27:35,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-01-28 06:27:35,064 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-01-28 06:27:35,064 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-01-28 06:27:35,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 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) [2023-01-28 06:27:35,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:35,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:35,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 06:27:35,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:35,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:35,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1135047098, now seen corresponding path program 2 times [2023-01-28 06:27:35,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:35,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977026890] [2023-01-28 06:27:35,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:35,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977026890] [2023-01-28 06:27:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977026890] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:27:35,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:27:35,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:27:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40741510] [2023-01-28 06:27:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:27:35,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:27:35,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:35,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:27:35,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:27:35,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:35,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 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) [2023-01-28 06:27:35,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:35,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:35,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:35,345 INFO L130 PetriNetUnfolder]: 126/219 cut-off events. [2023-01-28 06:27:35,345 INFO L131 PetriNetUnfolder]: For 298/298 co-relation queries the response was YES. [2023-01-28 06:27:35,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 219 events. 126/219 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 683 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 704. Up to 87 conditions per place. [2023-01-28 06:27:35,350 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2023-01-28 06:27:35,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2023-01-28 06:27:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:27:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:27:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 399 transitions. [2023-01-28 06:27:35,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596774193548387 [2023-01-28 06:27:35,353 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 399 transitions. [2023-01-28 06:27:35,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 399 transitions. [2023-01-28 06:27:35,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:35,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 399 transitions. [2023-01-28 06:27:35,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 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) [2023-01-28 06:27:35,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 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) [2023-01-28 06:27:35,359 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 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) [2023-01-28 06:27:35,360 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 399 transitions. [2023-01-28 06:27:35,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2023-01-28 06:27:35,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-01-28 06:27:35,364 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2023-01-28 06:27:35,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-01-28 06:27:35,366 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2023-01-28 06:27:35,368 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2023-01-28 06:27:35,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 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) [2023-01-28 06:27:35,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:35,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:35,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 06:27:35,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:35,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1601722647, now seen corresponding path program 1 times [2023-01-28 06:27:35,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:35,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406247221] [2023-01-28 06:27:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:35,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:35,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:35,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406247221] [2023-01-28 06:27:35,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406247221] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:27:35,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:27:35,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:27:35,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972603135] [2023-01-28 06:27:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:27:35,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 06:27:35,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 06:27:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 06:27:35,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:35,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 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) [2023-01-28 06:27:35,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:35,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:35,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:35,648 INFO L130 PetriNetUnfolder]: 162/283 cut-off events. [2023-01-28 06:27:35,648 INFO L131 PetriNetUnfolder]: For 777/777 co-relation queries the response was YES. [2023-01-28 06:27:35,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 283 events. 162/283 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 940 event pairs, 20 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1058. Up to 71 conditions per place. [2023-01-28 06:27:35,650 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2023-01-28 06:27:35,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2023-01-28 06:27:35,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 06:27:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 06:27:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 454 transitions. [2023-01-28 06:27:35,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576612903225806 [2023-01-28 06:27:35,652 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 454 transitions. [2023-01-28 06:27:35,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 454 transitions. [2023-01-28 06:27:35,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:35,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 454 transitions. [2023-01-28 06:27:35,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 56.75) internal successors, (454), 8 states have internal predecessors, (454), 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) [2023-01-28 06:27:35,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 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) [2023-01-28 06:27:35,656 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 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) [2023-01-28 06:27:35,656 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 454 transitions. [2023-01-28 06:27:35,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2023-01-28 06:27:35,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-01-28 06:27:35,662 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2023-01-28 06:27:35,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-01-28 06:27:35,663 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-01-28 06:27:35,663 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2023-01-28 06:27:35,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 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) [2023-01-28 06:27:35,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:35,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:35,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 06:27:35,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:35,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:35,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1572215607, now seen corresponding path program 2 times [2023-01-28 06:27:35,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:35,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626688902] [2023-01-28 06:27:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:35,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:35,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:35,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626688902] [2023-01-28 06:27:35,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626688902] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:27:35,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:27:35,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:27:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313266711] [2023-01-28 06:27:35,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:27:35,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 06:27:35,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 06:27:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-28 06:27:35,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:35,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 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) [2023-01-28 06:27:35,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:35,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:35,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:35,857 INFO L130 PetriNetUnfolder]: 154/271 cut-off events. [2023-01-28 06:27:35,858 INFO L131 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2023-01-28 06:27:35,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 154/271 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 926 event pairs, 22 based on Foata normal form. 8/279 useless extension candidates. Maximal degree in co-relation 1179. Up to 67 conditions per place. [2023-01-28 06:27:35,860 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2023-01-28 06:27:35,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2023-01-28 06:27:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:27:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:27:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 397 transitions. [2023-01-28 06:27:35,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573732718894009 [2023-01-28 06:27:35,862 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 397 transitions. [2023-01-28 06:27:35,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 397 transitions. [2023-01-28 06:27:35,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:35,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 397 transitions. [2023-01-28 06:27:35,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.714285714285715) internal successors, (397), 7 states have internal predecessors, (397), 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) [2023-01-28 06:27:35,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 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) [2023-01-28 06:27:35,865 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 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) [2023-01-28 06:27:35,865 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 397 transitions. [2023-01-28 06:27:35,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2023-01-28 06:27:35,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-01-28 06:27:35,871 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2023-01-28 06:27:35,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-01-28 06:27:35,872 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2023-01-28 06:27:35,872 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2023-01-28 06:27:35,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 states have internal predecessors, (316), 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) [2023-01-28 06:27:35,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:35,872 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:35,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 06:27:35,873 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:35,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:35,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1494024432, now seen corresponding path program 3 times [2023-01-28 06:27:35,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:35,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368018730] [2023-01-28 06:27:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:35,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:35,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:35,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368018730] [2023-01-28 06:27:35,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368018730] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:27:35,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249883496] [2023-01-28 06:27:35,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 06:27:35,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:35,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:27:35,985 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) [2023-01-28 06:27:36,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 06:27:36,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 06:27:36,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:27:36,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 06:27:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:27:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:36,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:27:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:36,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249883496] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:27:36,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:27:36,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 06:27:36,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805873902] [2023-01-28 06:27:36,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:27:36,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 06:27:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:36,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 06:27:36,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-01-28 06:27:36,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:36,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 12 states, 12 states have (on average 52.916666666666664) internal successors, (635), 12 states have internal predecessors, (635), 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) [2023-01-28 06:27:36,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:36,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:36,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:36,559 INFO L130 PetriNetUnfolder]: 202/351 cut-off events. [2023-01-28 06:27:36,560 INFO L131 PetriNetUnfolder]: For 2205/2205 co-relation queries the response was YES. [2023-01-28 06:27:36,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1197 event pairs, 18 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2023-01-28 06:27:36,562 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 34 selfloop transitions, 36 changer transitions 22/92 dead transitions. [2023-01-28 06:27:36,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 958 flow [2023-01-28 06:27:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 06:27:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 06:27:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2023-01-28 06:27:36,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539170506912442 [2023-01-28 06:27:36,565 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2023-01-28 06:27:36,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2023-01-28 06:27:36,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:36,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2023-01-28 06:27:36,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 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) [2023-01-28 06:27:36,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 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) [2023-01-28 06:27:36,571 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 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) [2023-01-28 06:27:36,571 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 14 states and 788 transitions. [2023-01-28 06:27:36,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 958 flow [2023-01-28 06:27:36,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 893 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-01-28 06:27:36,578 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 701 flow [2023-01-28 06:27:36,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=701, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-01-28 06:27:36,578 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 47 predicate places. [2023-01-28 06:27:36,579 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 701 flow [2023-01-28 06:27:36,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 52.916666666666664) internal successors, (635), 12 states have internal predecessors, (635), 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) [2023-01-28 06:27:36,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:36,579 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:36,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 06:27:36,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 06:27:36,785 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:36,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash 976616748, now seen corresponding path program 4 times [2023-01-28 06:27:36,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:36,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800266428] [2023-01-28 06:27:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:36,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:36,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800266428] [2023-01-28 06:27:36,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800266428] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:27:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373184017] [2023-01-28 06:27:36,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 06:27:36,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:36,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:27:36,931 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) [2023-01-28 06:27:36,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 06:27:36,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 06:27:36,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:27:36,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 06:27:36,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:27:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:37,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:27:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:37,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373184017] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:27:37,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:27:37,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-28 06:27:37,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356123972] [2023-01-28 06:27:37,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:27:37,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 06:27:37,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 06:27:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-01-28 06:27:37,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:37,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 701 flow. Second operand has 16 states, 16 states have (on average 52.75) internal successors, (844), 16 states have internal predecessors, (844), 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) [2023-01-28 06:27:37,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:37,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:37,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:37,492 INFO L130 PetriNetUnfolder]: 258/463 cut-off events. [2023-01-28 06:27:37,492 INFO L131 PetriNetUnfolder]: For 4313/4313 co-relation queries the response was YES. [2023-01-28 06:27:37,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2445 conditions, 463 events. 258/463 cut-off events. For 4313/4313 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1664 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2411. Up to 237 conditions per place. [2023-01-28 06:27:37,496 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2023-01-28 06:27:37,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 1469 flow [2023-01-28 06:27:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 06:27:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 06:27:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 899 transitions. [2023-01-28 06:27:37,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2023-01-28 06:27:37,500 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 899 transitions. [2023-01-28 06:27:37,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 899 transitions. [2023-01-28 06:27:37,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:37,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 899 transitions. [2023-01-28 06:27:37,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.1875) internal successors, (899), 16 states have internal predecessors, (899), 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) [2023-01-28 06:27:37,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 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) [2023-01-28 06:27:37,507 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 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) [2023-01-28 06:27:37,507 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 701 flow. Second operand 16 states and 899 transitions. [2023-01-28 06:27:37,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 1469 flow [2023-01-28 06:27:37,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1110 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-01-28 06:27:37,519 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 781 flow [2023-01-28 06:27:37,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=781, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2023-01-28 06:27:37,520 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2023-01-28 06:27:37,520 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 781 flow [2023-01-28 06:27:37,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.75) internal successors, (844), 16 states have internal predecessors, (844), 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) [2023-01-28 06:27:37,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:37,521 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:37,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 06:27:37,730 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,SelfDestructingSolverStorable6 [2023-01-28 06:27:37,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:37,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:37,731 INFO L85 PathProgramCache]: Analyzing trace with hash 921314670, now seen corresponding path program 5 times [2023-01-28 06:27:37,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:37,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838773053] [2023-01-28 06:27:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:37,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:37,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:37,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838773053] [2023-01-28 06:27:37,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838773053] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:27:37,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026743575] [2023-01-28 06:27:37,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 06:27:37,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:37,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:27:37,888 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) [2023-01-28 06:27:37,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 06:27:37,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 06:27:37,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:27:37,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 06:27:37,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:27:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:38,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:27:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:38,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026743575] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:27:38,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:27:38,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 06:27:38,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006586268] [2023-01-28 06:27:38,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:27:38,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 06:27:38,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 06:27:38,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-01-28 06:27:38,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:38,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 781 flow. Second operand has 17 states, 17 states have (on average 52.76470588235294) internal successors, (897), 17 states have internal predecessors, (897), 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) [2023-01-28 06:27:38,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:38,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:38,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:38,694 INFO L130 PetriNetUnfolder]: 412/755 cut-off events. [2023-01-28 06:27:38,694 INFO L131 PetriNetUnfolder]: For 12149/12149 co-relation queries the response was YES. [2023-01-28 06:27:38,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 755 events. 412/755 cut-off events. For 12149/12149 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3350 event pairs, 42 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3976. Up to 227 conditions per place. [2023-01-28 06:27:38,699 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2023-01-28 06:27:38,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2101 flow [2023-01-28 06:27:38,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 06:27:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 06:27:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1236 transitions. [2023-01-28 06:27:38,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4530791788856305 [2023-01-28 06:27:38,703 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1236 transitions. [2023-01-28 06:27:38,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1236 transitions. [2023-01-28 06:27:38,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:38,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1236 transitions. [2023-01-28 06:27:38,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 56.18181818181818) internal successors, (1236), 22 states have internal predecessors, (1236), 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) [2023-01-28 06:27:38,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 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) [2023-01-28 06:27:38,712 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 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) [2023-01-28 06:27:38,713 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 781 flow. Second operand 22 states and 1236 transitions. [2023-01-28 06:27:38,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2101 flow [2023-01-28 06:27:38,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1980 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-01-28 06:27:38,743 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1490 flow [2023-01-28 06:27:38,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1490, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-01-28 06:27:38,745 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2023-01-28 06:27:38,747 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1490 flow [2023-01-28 06:27:38,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.76470588235294) internal successors, (897), 17 states have internal predecessors, (897), 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) [2023-01-28 06:27:38,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:38,747 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:38,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 06:27:38,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:38,953 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:38,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1348503086, now seen corresponding path program 6 times [2023-01-28 06:27:38,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:38,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557941665] [2023-01-28 06:27:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:38,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:39,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:39,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557941665] [2023-01-28 06:27:39,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557941665] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:27:39,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238912494] [2023-01-28 06:27:39,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 06:27:39,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:27:39,086 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) [2023-01-28 06:27:39,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 06:27:39,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 06:27:39,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:27:39,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 06:27:39,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:27:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:39,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:27:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:39,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238912494] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:27:39,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:27:39,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-28 06:27:39,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404968516] [2023-01-28 06:27:39,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:27:39,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 06:27:39,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 06:27:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-01-28 06:27:39,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:39,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1490 flow. Second operand has 16 states, 16 states have (on average 52.75) internal successors, (844), 16 states have internal predecessors, (844), 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) [2023-01-28 06:27:39,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:39,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:39,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:39,861 INFO L130 PetriNetUnfolder]: 612/1111 cut-off events. [2023-01-28 06:27:39,861 INFO L131 PetriNetUnfolder]: For 38046/38046 co-relation queries the response was YES. [2023-01-28 06:27:39,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 1111 events. 612/1111 cut-off events. For 38046/38046 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5398 event pairs, 30 based on Foata normal form. 36/1147 useless extension candidates. Maximal degree in co-relation 7772. Up to 355 conditions per place. [2023-01-28 06:27:39,870 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 71 selfloop transitions, 134 changer transitions 41/246 dead transitions. [2023-01-28 06:27:39,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 3764 flow [2023-01-28 06:27:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 06:27:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 06:27:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1517 transitions. [2023-01-28 06:27:39,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531063321385902 [2023-01-28 06:27:39,875 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1517 transitions. [2023-01-28 06:27:39,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1517 transitions. [2023-01-28 06:27:39,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:39,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1517 transitions. [2023-01-28 06:27:39,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 56.18518518518518) internal successors, (1517), 27 states have internal predecessors, (1517), 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) [2023-01-28 06:27:39,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 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) [2023-01-28 06:27:39,885 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 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) [2023-01-28 06:27:39,885 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1490 flow. Second operand 27 states and 1517 transitions. [2023-01-28 06:27:39,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 3764 flow [2023-01-28 06:27:39,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 3448 flow, removed 148 selfloop flow, removed 4 redundant places. [2023-01-28 06:27:39,950 INFO L231 Difference]: Finished difference. Result has 153 places, 158 transitions, 2642 flow [2023-01-28 06:27:39,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2642, PETRI_PLACES=153, PETRI_TRANSITIONS=158} [2023-01-28 06:27:39,951 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2023-01-28 06:27:39,951 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 158 transitions, 2642 flow [2023-01-28 06:27:39,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.75) internal successors, (844), 16 states have internal predecessors, (844), 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) [2023-01-28 06:27:39,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:39,952 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:39,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 06:27:40,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:40,158 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:40,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:40,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1579002867, now seen corresponding path program 7 times [2023-01-28 06:27:40,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:40,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789014905] [2023-01-28 06:27:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:40,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:40,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:40,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789014905] [2023-01-28 06:27:40,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789014905] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:27:40,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094219299] [2023-01-28 06:27:40,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 06:27:40,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:40,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:27:40,284 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) [2023-01-28 06:27:40,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 06:27:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 06:27:40,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:27:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:40,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:27:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:27:40,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094219299] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:27:40,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:27:40,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-01-28 06:27:40,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550975150] [2023-01-28 06:27:40,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:27:40,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 06:27:40,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:40,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 06:27:40,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-01-28 06:27:40,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:40,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 158 transitions, 2642 flow. Second operand has 18 states, 18 states have (on average 52.72222222222222) internal successors, (949), 18 states have internal predecessors, (949), 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) [2023-01-28 06:27:40,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:40,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:40,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:41,332 INFO L130 PetriNetUnfolder]: 756/1375 cut-off events. [2023-01-28 06:27:41,332 INFO L131 PetriNetUnfolder]: For 84547/84547 co-relation queries the response was YES. [2023-01-28 06:27:41,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12537 conditions, 1375 events. 756/1375 cut-off events. For 84547/84547 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6872 event pairs, 12 based on Foata normal form. 40/1415 useless extension candidates. Maximal degree in co-relation 12465. Up to 458 conditions per place. [2023-01-28 06:27:41,348 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 62 selfloop transitions, 176 changer transitions 54/292 dead transitions. [2023-01-28 06:27:41,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 292 transitions, 6017 flow [2023-01-28 06:27:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 06:27:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 06:27:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1684 transitions. [2023-01-28 06:27:41,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45268817204301076 [2023-01-28 06:27:41,354 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1684 transitions. [2023-01-28 06:27:41,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1684 transitions. [2023-01-28 06:27:41,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:41,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1684 transitions. [2023-01-28 06:27:41,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 56.13333333333333) internal successors, (1684), 30 states have internal predecessors, (1684), 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) [2023-01-28 06:27:41,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 124.0) internal successors, (3844), 31 states have internal predecessors, (3844), 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) [2023-01-28 06:27:41,366 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 124.0) internal successors, (3844), 31 states have internal predecessors, (3844), 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) [2023-01-28 06:27:41,366 INFO L175 Difference]: Start difference. First operand has 153 places, 158 transitions, 2642 flow. Second operand 30 states and 1684 transitions. [2023-01-28 06:27:41,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 292 transitions, 6017 flow [2023-01-28 06:27:41,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 292 transitions, 4596 flow, removed 681 selfloop flow, removed 11 redundant places. [2023-01-28 06:27:41,541 INFO L231 Difference]: Finished difference. Result has 186 places, 202 transitions, 3515 flow [2023-01-28 06:27:41,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3515, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2023-01-28 06:27:41,543 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 168 predicate places. [2023-01-28 06:27:41,543 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 3515 flow [2023-01-28 06:27:41,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.72222222222222) internal successors, (949), 18 states have internal predecessors, (949), 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) [2023-01-28 06:27:41,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:41,543 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:41,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 06:27:41,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 06:27:41,750 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:41,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:41,750 INFO L85 PathProgramCache]: Analyzing trace with hash -513553686, now seen corresponding path program 8 times [2023-01-28 06:27:41,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:41,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104413223] [2023-01-28 06:27:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:41,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:42,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:42,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104413223] [2023-01-28 06:27:42,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104413223] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:27:42,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582335091] [2023-01-28 06:27:42,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 06:27:42,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:42,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:27:42,018 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:27:42,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 06:27:42,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 06:27:42,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:27:42,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 06:27:42,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:27:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:42,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:27:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:42,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582335091] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:27:42,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:27:42,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2023-01-28 06:27:42,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550681542] [2023-01-28 06:27:42,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:27:42,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 06:27:42,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:42,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 06:27:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2023-01-28 06:27:42,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:42,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 3515 flow. Second operand has 31 states, 31 states have (on average 52.354838709677416) internal successors, (1623), 31 states have internal predecessors, (1623), 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) [2023-01-28 06:27:42,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:42,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:42,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:43,940 INFO L130 PetriNetUnfolder]: 940/1683 cut-off events. [2023-01-28 06:27:43,940 INFO L131 PetriNetUnfolder]: For 117881/117881 co-relation queries the response was YES. [2023-01-28 06:27:43,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16451 conditions, 1683 events. 940/1683 cut-off events. For 117881/117881 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7975 event pairs, 18 based on Foata normal form. 52/1735 useless extension candidates. Maximal degree in co-relation 16366. Up to 574 conditions per place. [2023-01-28 06:27:43,959 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 90 selfloop transitions, 222 changer transitions 98/410 dead transitions. [2023-01-28 06:27:43,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 410 transitions, 8862 flow [2023-01-28 06:27:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-28 06:27:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-28 06:27:43,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2910 transitions. [2023-01-28 06:27:43,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451302729528536 [2023-01-28 06:27:43,964 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2910 transitions. [2023-01-28 06:27:43,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2910 transitions. [2023-01-28 06:27:43,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:43,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2910 transitions. [2023-01-28 06:27:43,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 55.96153846153846) internal successors, (2910), 52 states have internal predecessors, (2910), 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) [2023-01-28 06:27:43,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 124.0) internal successors, (6572), 53 states have internal predecessors, (6572), 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) [2023-01-28 06:27:43,984 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 124.0) internal successors, (6572), 53 states have internal predecessors, (6572), 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) [2023-01-28 06:27:43,985 INFO L175 Difference]: Start difference. First operand has 186 places, 202 transitions, 3515 flow. Second operand 52 states and 2910 transitions. [2023-01-28 06:27:43,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 410 transitions, 8862 flow [2023-01-28 06:27:44,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 410 transitions, 7981 flow, removed 412 selfloop flow, removed 8 redundant places. [2023-01-28 06:27:44,169 INFO L231 Difference]: Finished difference. Result has 255 places, 248 transitions, 5156 flow [2023-01-28 06:27:44,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5156, PETRI_PLACES=255, PETRI_TRANSITIONS=248} [2023-01-28 06:27:44,170 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 237 predicate places. [2023-01-28 06:27:44,170 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 248 transitions, 5156 flow [2023-01-28 06:27:44,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 52.354838709677416) internal successors, (1623), 31 states have internal predecessors, (1623), 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) [2023-01-28 06:27:44,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:44,171 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:44,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 06:27:44,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:44,377 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:44,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash -672099493, now seen corresponding path program 9 times [2023-01-28 06:27:44,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:44,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744943561] [2023-01-28 06:27:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:44,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744943561] [2023-01-28 06:27:44,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744943561] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:27:44,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489915082] [2023-01-28 06:27:44,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 06:27:44,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:44,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:27:44,878 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:27:44,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 06:27:44,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-01-28 06:27:44,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:27:44,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 06:27:44,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:27:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:45,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:27:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:45,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489915082] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:27:45,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:27:45,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-01-28 06:27:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365453711] [2023-01-28 06:27:45,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:27:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-01-28 06:27:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-01-28 06:27:45,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2023-01-28 06:27:45,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:45,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 248 transitions, 5156 flow. Second operand has 50 states, 50 states have (on average 52.2) internal successors, (2610), 50 states have internal predecessors, (2610), 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) [2023-01-28 06:27:45,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:45,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:45,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:47,440 INFO L130 PetriNetUnfolder]: 1300/2403 cut-off events. [2023-01-28 06:27:47,440 INFO L131 PetriNetUnfolder]: For 323719/323719 co-relation queries the response was YES. [2023-01-28 06:27:47,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31690 conditions, 2403 events. 1300/2403 cut-off events. For 323719/323719 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12185 event pairs, 236 based on Foata normal form. 72/2475 useless extension candidates. Maximal degree in co-relation 31579. Up to 993 conditions per place. [2023-01-28 06:27:47,472 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 219 selfloop transitions, 179 changer transitions 103/501 dead transitions. [2023-01-28 06:27:47,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 501 transitions, 14353 flow [2023-01-28 06:27:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-01-28 06:27:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-01-28 06:27:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3001 transitions. [2023-01-28 06:27:47,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44817801672640384 [2023-01-28 06:27:47,477 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3001 transitions. [2023-01-28 06:27:47,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3001 transitions. [2023-01-28 06:27:47,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:47,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3001 transitions. [2023-01-28 06:27:47,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 55.574074074074076) internal successors, (3001), 54 states have internal predecessors, (3001), 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) [2023-01-28 06:27:47,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 124.0) internal successors, (6820), 55 states have internal predecessors, (6820), 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) [2023-01-28 06:27:47,491 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 124.0) internal successors, (6820), 55 states have internal predecessors, (6820), 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) [2023-01-28 06:27:47,491 INFO L175 Difference]: Start difference. First operand has 255 places, 248 transitions, 5156 flow. Second operand 54 states and 3001 transitions. [2023-01-28 06:27:47,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 501 transitions, 14353 flow [2023-01-28 06:27:48,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 501 transitions, 11122 flow, removed 1538 selfloop flow, removed 16 redundant places. [2023-01-28 06:27:48,200 INFO L231 Difference]: Finished difference. Result has 316 places, 340 transitions, 6942 flow [2023-01-28 06:27:48,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=6942, PETRI_PLACES=316, PETRI_TRANSITIONS=340} [2023-01-28 06:27:48,201 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 298 predicate places. [2023-01-28 06:27:48,202 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 340 transitions, 6942 flow [2023-01-28 06:27:48,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 52.2) internal successors, (2610), 50 states have internal predecessors, (2610), 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) [2023-01-28 06:27:48,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:48,203 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:48,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 06:27:48,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:48,408 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:48,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash 499642727, now seen corresponding path program 10 times [2023-01-28 06:27:48,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:48,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323077450] [2023-01-28 06:27:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:48,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:48,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:48,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323077450] [2023-01-28 06:27:48,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323077450] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:27:48,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582492560] [2023-01-28 06:27:48,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 06:27:48,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:48,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:27:48,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:27:48,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 06:27:48,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 06:27:48,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:27:48,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 06:27:48,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:27:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:49,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:27:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:49,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582492560] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:27:49,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:27:49,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2023-01-28 06:27:49,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563696242] [2023-01-28 06:27:49,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:27:49,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-28 06:27:49,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:49,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-28 06:27:49,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=2093, Unknown=0, NotChecked=0, Total=2550 [2023-01-28 06:27:49,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:49,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 340 transitions, 6942 flow. Second operand has 51 states, 51 states have (on average 52.23529411764706) internal successors, (2664), 51 states have internal predecessors, (2664), 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) [2023-01-28 06:27:49,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:49,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:49,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:52,037 INFO L130 PetriNetUnfolder]: 1632/3063 cut-off events. [2023-01-28 06:27:52,038 INFO L131 PetriNetUnfolder]: For 708353/708353 co-relation queries the response was YES. [2023-01-28 06:27:52,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45122 conditions, 3063 events. 1632/3063 cut-off events. For 708353/708353 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 16234 event pairs, 72 based on Foata normal form. 72/3135 useless extension candidates. Maximal degree in co-relation 44986. Up to 1246 conditions per place. [2023-01-28 06:27:52,078 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 131 selfloop transitions, 361 changer transitions 123/615 dead transitions. [2023-01-28 06:27:52,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 615 transitions, 16914 flow [2023-01-28 06:27:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-01-28 06:27:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-01-28 06:27:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3564 transitions. [2023-01-28 06:27:52,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490927419354839 [2023-01-28 06:27:52,083 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3564 transitions. [2023-01-28 06:27:52,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3564 transitions. [2023-01-28 06:27:52,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:52,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3564 transitions. [2023-01-28 06:27:52,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 55.6875) internal successors, (3564), 64 states have internal predecessors, (3564), 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) [2023-01-28 06:27:52,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 124.0) internal successors, (8060), 65 states have internal predecessors, (8060), 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) [2023-01-28 06:27:52,098 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 124.0) internal successors, (8060), 65 states have internal predecessors, (8060), 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) [2023-01-28 06:27:52,098 INFO L175 Difference]: Start difference. First operand has 316 places, 340 transitions, 6942 flow. Second operand 64 states and 3564 transitions. [2023-01-28 06:27:52,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 615 transitions, 16914 flow [2023-01-28 06:27:53,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 615 transitions, 15212 flow, removed 784 selfloop flow, removed 21 redundant places. [2023-01-28 06:27:53,340 INFO L231 Difference]: Finished difference. Result has 379 places, 425 transitions, 9430 flow [2023-01-28 06:27:53,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=9430, PETRI_PLACES=379, PETRI_TRANSITIONS=425} [2023-01-28 06:27:53,341 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 361 predicate places. [2023-01-28 06:27:53,341 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 425 transitions, 9430 flow [2023-01-28 06:27:53,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 52.23529411764706) internal successors, (2664), 51 states have internal predecessors, (2664), 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) [2023-01-28 06:27:53,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:27:53,342 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:27:53,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 06:27:53,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 06:27:53,548 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:27:53,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:27:53,548 INFO L85 PathProgramCache]: Analyzing trace with hash -954991693, now seen corresponding path program 11 times [2023-01-28 06:27:53,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:27:53,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150141505] [2023-01-28 06:27:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:27:53,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:27:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:27:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:53,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:27:53,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150141505] [2023-01-28 06:27:53,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150141505] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:27:53,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790458158] [2023-01-28 06:27:53,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 06:27:53,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:27:53,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:27:53,954 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:27:53,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 06:27:54,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-01-28 06:27:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:27:54,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 06:27:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:27:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:54,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:27:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:27:54,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790458158] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:27:54,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:27:54,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2023-01-28 06:27:54,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115405929] [2023-01-28 06:27:54,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:27:54,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-28 06:27:54,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:27:54,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-28 06:27:54,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=2093, Unknown=0, NotChecked=0, Total=2550 [2023-01-28 06:27:54,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:27:54,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 425 transitions, 9430 flow. Second operand has 51 states, 51 states have (on average 52.23529411764706) internal successors, (2664), 51 states have internal predecessors, (2664), 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) [2023-01-28 06:27:54,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:27:54,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:27:54,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:27:57,943 INFO L130 PetriNetUnfolder]: 1988/3695 cut-off events. [2023-01-28 06:27:57,944 INFO L131 PetriNetUnfolder]: For 1289952/1289952 co-relation queries the response was YES. [2023-01-28 06:27:57,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64940 conditions, 3695 events. 1988/3695 cut-off events. For 1289952/1289952 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 19523 event pairs, 10 based on Foata normal form. 84/3779 useless extension candidates. Maximal degree in co-relation 64793. Up to 1514 conditions per place. [2023-01-28 06:27:57,990 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 119 selfloop transitions, 486 changer transitions 161/766 dead transitions. [2023-01-28 06:27:57,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 766 transitions, 25506 flow [2023-01-28 06:27:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-01-28 06:27:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-01-28 06:27:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4687 transitions. [2023-01-28 06:27:57,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44998079877112135 [2023-01-28 06:27:57,996 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4687 transitions. [2023-01-28 06:27:57,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4687 transitions. [2023-01-28 06:27:57,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:27:57,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4687 transitions. [2023-01-28 06:27:58,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 55.79761904761905) internal successors, (4687), 84 states have internal predecessors, (4687), 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) [2023-01-28 06:27:58,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 124.0) internal successors, (10540), 85 states have internal predecessors, (10540), 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) [2023-01-28 06:27:58,014 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 124.0) internal successors, (10540), 85 states have internal predecessors, (10540), 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) [2023-01-28 06:27:58,014 INFO L175 Difference]: Start difference. First operand has 379 places, 425 transitions, 9430 flow. Second operand 84 states and 4687 transitions. [2023-01-28 06:27:58,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 766 transitions, 25506 flow [2023-01-28 06:28:00,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 766 transitions, 22525 flow, removed 1302 selfloop flow, removed 25 redundant places. [2023-01-28 06:28:00,204 INFO L231 Difference]: Finished difference. Result has 471 places, 516 transitions, 13279 flow [2023-01-28 06:28:00,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=7177, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=13279, PETRI_PLACES=471, PETRI_TRANSITIONS=516} [2023-01-28 06:28:00,204 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 453 predicate places. [2023-01-28 06:28:00,204 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 516 transitions, 13279 flow [2023-01-28 06:28:00,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 52.23529411764706) internal successors, (2664), 51 states have internal predecessors, (2664), 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) [2023-01-28 06:28:00,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:28:00,205 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:28:00,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 06:28:00,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 06:28:00,406 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:28:00,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:28:00,406 INFO L85 PathProgramCache]: Analyzing trace with hash -193875302, now seen corresponding path program 12 times [2023-01-28 06:28:00,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:28:00,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087527573] [2023-01-28 06:28:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:28:00,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:28:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:28:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:28:01,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:28:01,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087527573] [2023-01-28 06:28:01,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087527573] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:28:01,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178792116] [2023-01-28 06:28:01,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 06:28:01,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:28:01,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:28:01,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:28:01,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 06:28:01,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-01-28 06:28:01,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 06:28:01,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 06:28:01,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:28:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:28:01,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:28:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:28:01,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178792116] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:28:01,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:28:01,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2023-01-28 06:28:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972120210] [2023-01-28 06:28:01,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:28:01,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-01-28 06:28:01,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:28:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-01-28 06:28:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=3901, Unknown=0, NotChecked=0, Total=5112 [2023-01-28 06:28:01,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:28:01,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 516 transitions, 13279 flow. Second operand has 72 states, 72 states have (on average 52.138888888888886) internal successors, (3754), 72 states have internal predecessors, (3754), 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) [2023-01-28 06:28:01,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:28:01,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:28:01,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:28:05,921 INFO L130 PetriNetUnfolder]: 2388/4423 cut-off events. [2023-01-28 06:28:05,921 INFO L131 PetriNetUnfolder]: For 2531362/2531362 co-relation queries the response was YES. [2023-01-28 06:28:05,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97549 conditions, 4423 events. 2388/4423 cut-off events. For 2531362/2531362 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 23548 event pairs, 22 based on Foata normal form. 48/4471 useless extension candidates. Maximal degree in co-relation 97367. Up to 1818 conditions per place. [2023-01-28 06:28:05,980 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 146 selfloop transitions, 582 changer transitions 167/895 dead transitions. [2023-01-28 06:28:05,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 895 transitions, 35696 flow [2023-01-28 06:28:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-01-28 06:28:05,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2023-01-28 06:28:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 5017 transitions. [2023-01-28 06:28:05,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44955197132616487 [2023-01-28 06:28:05,986 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 5017 transitions. [2023-01-28 06:28:05,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 5017 transitions. [2023-01-28 06:28:05,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:28:05,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 5017 transitions. [2023-01-28 06:28:05,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 55.74444444444445) internal successors, (5017), 90 states have internal predecessors, (5017), 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) [2023-01-28 06:28:06,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 124.0) internal successors, (11284), 91 states have internal predecessors, (11284), 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) [2023-01-28 06:28:06,003 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 124.0) internal successors, (11284), 91 states have internal predecessors, (11284), 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) [2023-01-28 06:28:06,003 INFO L175 Difference]: Start difference. First operand has 471 places, 516 transitions, 13279 flow. Second operand 90 states and 5017 transitions. [2023-01-28 06:28:06,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 895 transitions, 35696 flow [2023-01-28 06:28:11,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 895 transitions, 28082 flow, removed 3567 selfloop flow, removed 30 redundant places. [2023-01-28 06:28:11,163 INFO L231 Difference]: Finished difference. Result has 552 places, 614 transitions, 14996 flow [2023-01-28 06:28:11,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=8881, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=14996, PETRI_PLACES=552, PETRI_TRANSITIONS=614} [2023-01-28 06:28:11,164 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 534 predicate places. [2023-01-28 06:28:11,164 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 614 transitions, 14996 flow [2023-01-28 06:28:11,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 52.138888888888886) internal successors, (3754), 72 states have internal predecessors, (3754), 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) [2023-01-28 06:28:11,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:28:11,165 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:28:11,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 06:28:11,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 06:28:11,366 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:28:11,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:28:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash 432945037, now seen corresponding path program 13 times [2023-01-28 06:28:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:28:11,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432581063] [2023-01-28 06:28:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:28:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:28:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:28:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:28:12,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:28:12,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432581063] [2023-01-28 06:28:12,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432581063] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 06:28:12,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825873086] [2023-01-28 06:28:12,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 06:28:12,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 06:28:12,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:28:12,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 06:28:12,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 06:28:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:28:12,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 06:28:12,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 06:28:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:28:12,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 06:28:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:28:13,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825873086] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 06:28:13,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 06:28:13,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 81 [2023-01-28 06:28:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561316476] [2023-01-28 06:28:13,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 06:28:13,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-01-28 06:28:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:28:13,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-01-28 06:28:13,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1575, Invalid=5231, Unknown=0, NotChecked=0, Total=6806 [2023-01-28 06:28:13,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-28 06:28:13,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 614 transitions, 14996 flow. Second operand has 83 states, 83 states have (on average 52.13253012048193) internal successors, (4327), 83 states have internal predecessors, (4327), 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) [2023-01-28 06:28:13,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:28:13,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-28 06:28:13,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:28:17,249 INFO L130 PetriNetUnfolder]: 2468/4559 cut-off events. [2023-01-28 06:28:17,249 INFO L131 PetriNetUnfolder]: For 3165113/3165113 co-relation queries the response was YES. [2023-01-28 06:28:17,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106216 conditions, 4559 events. 2468/4559 cut-off events. For 3165113/3165113 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 24127 event pairs, 32 based on Foata normal form. 8/4567 useless extension candidates. Maximal degree in co-relation 106013. Up to 1858 conditions per place. [2023-01-28 06:28:17,307 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 135 selfloop transitions, 589 changer transitions 158/882 dead transitions. [2023-01-28 06:28:17,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 882 transitions, 32597 flow [2023-01-28 06:28:17,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-01-28 06:28:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-01-28 06:28:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 4564 transitions. [2023-01-28 06:28:17,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44885916601101494 [2023-01-28 06:28:17,312 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 4564 transitions. [2023-01-28 06:28:17,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 4564 transitions. [2023-01-28 06:28:17,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:28:17,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 4564 transitions. [2023-01-28 06:28:17,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 55.65853658536585) internal successors, (4564), 82 states have internal predecessors, (4564), 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) [2023-01-28 06:28:17,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 124.0) internal successors, (10292), 83 states have internal predecessors, (10292), 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) [2023-01-28 06:28:17,326 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 124.0) internal successors, (10292), 83 states have internal predecessors, (10292), 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) [2023-01-28 06:28:17,326 INFO L175 Difference]: Start difference. First operand has 552 places, 614 transitions, 14996 flow. Second operand 82 states and 4564 transitions. [2023-01-28 06:28:17,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 882 transitions, 32597 flow [2023-01-28 06:28:22,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 882 transitions, 26739 flow, removed 2563 selfloop flow, removed 49 redundant places. [2023-01-28 06:28:22,814 INFO L231 Difference]: Finished difference. Result has 592 places, 634 transitions, 13045 flow [2023-01-28 06:28:22,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=11058, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=13045, PETRI_PLACES=592, PETRI_TRANSITIONS=634} [2023-01-28 06:28:22,815 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 574 predicate places. [2023-01-28 06:28:22,816 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 634 transitions, 13045 flow [2023-01-28 06:28:22,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 52.13253012048193) internal successors, (4327), 83 states have internal predecessors, (4327), 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) [2023-01-28 06:28:22,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:28:22,817 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:28:22,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-28 06:28:23,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 06:28:23,017 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:28:23,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:28:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1412676792, now seen corresponding path program 14 times [2023-01-28 06:28:23,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:28:23,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915398341] [2023-01-28 06:28:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:28:23,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:28:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:28:23,058 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:28:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:28:23,130 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:28:23,130 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:28:23,132 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 06:28:23,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 06:28:23,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 06:28:23,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-28 06:28:23,135 INFO L445 BasicCegarLoop]: Path program histogram: [14, 2, 1] [2023-01-28 06:28:23,140 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 06:28:23,140 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 06:28:23,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 06:28:23 BasicIcfg [2023-01-28 06:28:23,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 06:28:23,241 INFO L158 Benchmark]: Toolchain (without parser) took 51800.81ms. Allocated memory was 354.4MB in the beginning and 2.9GB in the end (delta: 2.6GB). Free memory was 312.2MB in the beginning and 2.2GB in the end (delta: -1.8GB). Peak memory consumption was 719.4MB. Max. memory is 16.0GB. [2023-01-28 06:28:23,241 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 06:28:23,242 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.03ms. Allocated memory is still 354.4MB. Free memory was 312.2MB in the beginning and 292.9MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-28 06:28:23,242 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.88ms. Allocated memory is still 354.4MB. Free memory was 292.9MB in the beginning and 290.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 06:28:23,242 INFO L158 Benchmark]: Boogie Preprocessor took 32.69ms. Allocated memory is still 354.4MB. Free memory was 290.9MB in the beginning and 289.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 06:28:23,242 INFO L158 Benchmark]: RCFGBuilder took 328.26ms. Allocated memory is still 354.4MB. Free memory was 289.6MB in the beginning and 276.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 06:28:23,243 INFO L158 Benchmark]: TraceAbstraction took 50975.12ms. Allocated memory was 354.4MB in the beginning and 2.9GB in the end (delta: 2.6GB). Free memory was 276.3MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 683.7MB. Max. memory is 16.0GB. [2023-01-28 06:28:23,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 411.03ms. Allocated memory is still 354.4MB. Free memory was 312.2MB in the beginning and 292.9MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.88ms. Allocated memory is still 354.4MB. Free memory was 292.9MB in the beginning and 290.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.69ms. Allocated memory is still 354.4MB. Free memory was 290.9MB in the beginning and 289.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 328.26ms. Allocated memory is still 354.4MB. Free memory was 289.6MB in the beginning and 276.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 50975.12ms. Allocated memory was 354.4MB in the beginning and 2.9GB in the end (delta: 2.6GB). Free memory was 276.3MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 683.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 66 PlacesBefore, 18 PlacesAfterwards, 64 TransitionsBefore, 14 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 58 TotalNumberOfCompositions, 999 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 856, independent: 829, independent conditional: 0, independent unconditional: 829, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 590, independent: 578, independent conditional: 0, independent unconditional: 578, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 856, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 590, unknown conditional: 0, unknown unconditional: 590] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*20 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=11] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=12] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=14] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=15] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=16] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=18] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=19] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=20] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L719] 0 int condJ = j >= (2*20 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, condJ=1, i=45, id1={5:0}, id2={3:0}, j=46, k=20, k=20] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 50.8s, OverallIterations: 17, TraceHistogramMax: 20, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 36.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7184 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7184 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 688 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4140 IncrementalHoareTripleChecker+Invalid, 4828 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 688 mSolverCounterUnsat, 0 mSDtfsCounter, 4140 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1217 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 909 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30376 ImplicationChecksByTransitivity, 14.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14996occurred in iteration=15, InterpolantAutomatonStates: 567, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 620 NumberOfCodeBlocks, 620 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 799 ConstructedInterpolants, 0 QuantifiedInterpolants, 3351 SizeOfPredicates, 173 NumberOfNonLiveVariables, 2095 ConjunctsInSsa, 239 ConjunctsInUnsatCore, 38 InterpolantComputations, 5 PerfectInterpolantSequences, 12/2967 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-01-28 06:28:23,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...