/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/weaver/fibonacci.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 09:27:32,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 09:27:32,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 09:27:32,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 09:27:32,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 09:27:32,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 09:27:32,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 09:27:32,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 09:27:32,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 09:27:32,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 09:27:32,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 09:27:32,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 09:27:32,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 09:27:32,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 09:27:32,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 09:27:32,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 09:27:32,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 09:27:32,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 09:27:32,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 09:27:32,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 09:27:32,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 09:27:32,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 09:27:32,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 09:27:32,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 09:27:32,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 09:27:32,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 09:27:32,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 09:27:32,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 09:27:32,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 09:27:32,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 09:27:32,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 09:27:32,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 09:27:32,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 09:27:32,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 09:27:32,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 09:27:32,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 09:27:32,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 09:27:32,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 09:27:32,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 09:27:32,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 09:27:32,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 09:27:32,102 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 09:27:32,119 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 09:27:32,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 09:27:32,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 09:27:32,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 09:27:32,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 09:27:32,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 09:27:32,122 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 09:27:32,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 09:27:32,122 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 09:27:32,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 09:27:32,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 09:27:32,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 09:27:32,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 09:27:32,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 09:27:32,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 09:27:32,123 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 09:27:32,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 09:27:32,123 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 09:27:32,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 09:27:32,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 09:27:32,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 09:27:32,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 09:27:32,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 09:27:32,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:27:32,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 09:27:32,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 09:27:32,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 09:27:32,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 09:27:32,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 09:27:32,124 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 09:27:32,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 09:27:32,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 09:27:32,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 09:27:32,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 09:27:32,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 09:27:32,338 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 09:27:32,339 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 09:27:32,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-01-28 09:27:33,563 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 09:27:33,733 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 09:27:33,733 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-01-28 09:27:33,738 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8adcbf03e/807da019fa6446eabc3cd8a2e0e2d28e/FLAG18f520156 [2023-01-28 09:27:33,751 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8adcbf03e/807da019fa6446eabc3cd8a2e0e2d28e [2023-01-28 09:27:33,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 09:27:33,755 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 09:27:33,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 09:27:33,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 09:27:33,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 09:27:33,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:33,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb9e0be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33, skipping insertion in model container [2023-01-28 09:27:33,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:33,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 09:27:33,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 09:27:33,909 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c[2330,2343] [2023-01-28 09:27:33,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:27:33,924 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 09:27:33,941 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c[2330,2343] [2023-01-28 09:27:33,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:27:33,954 INFO L208 MainTranslator]: Completed translation [2023-01-28 09:27:33,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33 WrapperNode [2023-01-28 09:27:33,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 09:27:33,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 09:27:33,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 09:27:33,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 09:27:33,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:33,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:34,004 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 169 [2023-01-28 09:27:34,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 09:27:34,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 09:27:34,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 09:27:34,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 09:27:34,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:34,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:34,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:34,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:34,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:34,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:34,022 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:34,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:34,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 09:27:34,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 09:27:34,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 09:27:34,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 09:27:34,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (1/1) ... [2023-01-28 09:27:34,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:27:34,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:34,051 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 09:27:34,059 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 09:27:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 09:27:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 09:27:34,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 09:27:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 09:27:34,083 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 09:27:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 09:27:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 09:27:34,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 09:27:34,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 09:27:34,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 09:27:34,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 09:27:34,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 09:27:34,085 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 09:27:34,168 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 09:27:34,169 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 09:27:34,446 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 09:27:34,455 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 09:27:34,455 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 09:27:34,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:27:34 BoogieIcfgContainer [2023-01-28 09:27:34,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 09:27:34,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 09:27:34,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 09:27:34,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 09:27:34,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 09:27:33" (1/3) ... [2023-01-28 09:27:34,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c660d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:27:34, skipping insertion in model container [2023-01-28 09:27:34,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:27:33" (2/3) ... [2023-01-28 09:27:34,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c660d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:27:34, skipping insertion in model container [2023-01-28 09:27:34,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:27:34" (3/3) ... [2023-01-28 09:27:34,463 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-01-28 09:27:34,478 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 09:27:34,478 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 09:27:34,478 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 09:27:34,596 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 09:27:34,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 196 transitions, 408 flow [2023-01-28 09:27:34,718 INFO L130 PetriNetUnfolder]: 14/194 cut-off events. [2023-01-28 09:27:34,718 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 09:27:34,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 194 events. 14/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 288 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-01-28 09:27:34,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 196 transitions, 408 flow [2023-01-28 09:27:34,738 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 186 transitions, 384 flow [2023-01-28 09:27:34,741 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 09:27:34,749 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 186 transitions, 384 flow [2023-01-28 09:27:34,754 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 186 transitions, 384 flow [2023-01-28 09:27:34,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 186 transitions, 384 flow [2023-01-28 09:27:34,819 INFO L130 PetriNetUnfolder]: 14/186 cut-off events. [2023-01-28 09:27:34,820 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 09:27:34,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 186 events. 14/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-01-28 09:27:34,828 INFO L119 LiptonReduction]: Number of co-enabled transitions 7452 [2023-01-28 09:27:40,045 INFO L134 LiptonReduction]: Checked pairs total: 6342 [2023-01-28 09:27:40,045 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-01-28 09:27:40,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 09:27:40,069 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;@412b4a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 09:27:40,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 09:27:40,086 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 09:27:40,086 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 09:27:40,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:40,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:40,087 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 09:27:40,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2015475980, now seen corresponding path program 1 times [2023-01-28 09:27:40,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:40,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673634720] [2023-01-28 09:27:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:40,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:40,731 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 09:27:40,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:40,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673634720] [2023-01-28 09:27:40,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673634720] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:27:40,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:27:40,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 09:27:40,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964780850] [2023-01-28 09:27:40,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:27:40,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:27:40,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:40,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:27:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:27:40,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-01-28 09:27:40,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 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 09:27:40,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:40,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-01-28 09:27:40,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:40,904 INFO L130 PetriNetUnfolder]: 64/119 cut-off events. [2023-01-28 09:27:40,904 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-01-28 09:27:40,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 119 events. 64/119 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 334 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 181. Up to 85 conditions per place. [2023-01-28 09:27:40,907 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2023-01-28 09:27:40,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 35 transitions, 166 flow [2023-01-28 09:27:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:27:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:27:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 839 transitions. [2023-01-28 09:27:40,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40728155339805827 [2023-01-28 09:27:40,969 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 839 transitions. [2023-01-28 09:27:40,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 839 transitions. [2023-01-28 09:27:40,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:40,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 839 transitions. [2023-01-28 09:27:40,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.8) internal successors, (839), 5 states have internal predecessors, (839), 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 09:27:40,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:40,987 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:40,988 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 839 transitions. [2023-01-28 09:27:40,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 35 transitions, 166 flow [2023-01-28 09:27:40,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 09:27:40,992 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2023-01-28 09:27:40,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-01-28 09:27:40,997 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-01-28 09:27:40,997 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2023-01-28 09:27:40,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 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 09:27:40,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:40,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:40,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 09:27:40,998 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 09:27:40,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:40,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1883585228, now seen corresponding path program 2 times [2023-01-28 09:27:40,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:40,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757876539] [2023-01-28 09:27:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:40,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:41,150 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 09:27:41,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:41,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757876539] [2023-01-28 09:27:41,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757876539] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:27:41,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:27:41,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 09:27:41,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891185804] [2023-01-28 09:27:41,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:27:41,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:27:41,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:41,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:27:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:27:41,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-01-28 09:27:41,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 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 09:27:41,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:41,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-01-28 09:27:41,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:41,247 INFO L130 PetriNetUnfolder]: 63/111 cut-off events. [2023-01-28 09:27:41,247 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 09:27:41,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 111 events. 63/111 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 283 event pairs, 1 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 316. Up to 85 conditions per place. [2023-01-28 09:27:41,248 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 21 selfloop transitions, 6 changer transitions 5/34 dead transitions. [2023-01-28 09:27:41,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 176 flow [2023-01-28 09:27:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:27:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:27:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 837 transitions. [2023-01-28 09:27:41,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40631067961165046 [2023-01-28 09:27:41,251 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 837 transitions. [2023-01-28 09:27:41,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 837 transitions. [2023-01-28 09:27:41,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:41,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 837 transitions. [2023-01-28 09:27:41,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.4) internal successors, (837), 5 states have internal predecessors, (837), 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 09:27:41,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:41,258 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:41,258 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 837 transitions. [2023-01-28 09:27:41,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 176 flow [2023-01-28 09:27:41,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 09:27:41,261 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2023-01-28 09:27:41,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-01-28 09:27:41,262 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-01-28 09:27:41,262 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2023-01-28 09:27:41,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 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 09:27:41,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:41,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:41,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 09:27:41,263 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 09:27:41,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:41,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1189875957, now seen corresponding path program 1 times [2023-01-28 09:27:41,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:41,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131973948] [2023-01-28 09:27:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:41,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:41,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:41,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131973948] [2023-01-28 09:27:41,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131973948] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:27:41,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:27:41,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 09:27:41,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523975553] [2023-01-28 09:27:41,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:27:41,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:27:41,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:41,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:27:41,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:27:41,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:41,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 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 09:27:41,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:41,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:41,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:41,426 INFO L130 PetriNetUnfolder]: 84/157 cut-off events. [2023-01-28 09:27:41,426 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-28 09:27:41,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 157 events. 84/157 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 477 event pairs, 28 based on Foata normal form. 4/147 useless extension candidates. Maximal degree in co-relation 476. Up to 84 conditions per place. [2023-01-28 09:27:41,427 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 32 selfloop transitions, 6 changer transitions 6/44 dead transitions. [2023-01-28 09:27:41,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 44 transitions, 267 flow [2023-01-28 09:27:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:27:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:27:41,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 872 transitions. [2023-01-28 09:27:41,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42330097087378643 [2023-01-28 09:27:41,430 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 872 transitions. [2023-01-28 09:27:41,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 872 transitions. [2023-01-28 09:27:41,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:41,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 872 transitions. [2023-01-28 09:27:41,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.4) internal successors, (872), 5 states have internal predecessors, (872), 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 09:27:41,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:41,438 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:41,438 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 5 states and 872 transitions. [2023-01-28 09:27:41,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 44 transitions, 267 flow [2023-01-28 09:27:41,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 253 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:41,441 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 127 flow [2023-01-28 09:27:41,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-01-28 09:27:41,441 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-01-28 09:27:41,442 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 127 flow [2023-01-28 09:27:41,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 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 09:27:41,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:41,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:41,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 09:27:41,443 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 09:27:41,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972385, now seen corresponding path program 2 times [2023-01-28 09:27:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:41,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329202609] [2023-01-28 09:27:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:41,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:41,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:41,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329202609] [2023-01-28 09:27:41,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329202609] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:27:41,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:27:41,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 09:27:41,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188613305] [2023-01-28 09:27:41,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:27:41,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:27:41,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:41,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:27:41,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:27:41,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:41,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 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 09:27:41,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:41,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:41,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:41,583 INFO L130 PetriNetUnfolder]: 102/193 cut-off events. [2023-01-28 09:27:41,583 INFO L131 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2023-01-28 09:27:41,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 193 events. 102/193 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 588 event pairs, 38 based on Foata normal form. 6/179 useless extension candidates. Maximal degree in co-relation 646. Up to 128 conditions per place. [2023-01-28 09:27:41,584 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 33 selfloop transitions, 9 changer transitions 7/49 dead transitions. [2023-01-28 09:27:41,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 354 flow [2023-01-28 09:27:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 09:27:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 09:27:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1043 transitions. [2023-01-28 09:27:41,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42192556634304207 [2023-01-28 09:27:41,588 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1043 transitions. [2023-01-28 09:27:41,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1043 transitions. [2023-01-28 09:27:41,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:41,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1043 transitions. [2023-01-28 09:27:41,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.83333333333334) internal successors, (1043), 6 states have internal predecessors, (1043), 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 09:27:41,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 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 09:27:41,597 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 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 09:27:41,598 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 127 flow. Second operand 6 states and 1043 transitions. [2023-01-28 09:27:41,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 354 flow [2023-01-28 09:27:41,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 334 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:41,606 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 186 flow [2023-01-28 09:27:41,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-01-28 09:27:41,607 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-01-28 09:27:41,607 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 186 flow [2023-01-28 09:27:41,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 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 09:27:41,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:41,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:41,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 09:27:41,608 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 09:27:41,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash 993485807, now seen corresponding path program 1 times [2023-01-28 09:27:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:41,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647613193] [2023-01-28 09:27:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:41,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:41,663 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 09:27:41,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647613193] [2023-01-28 09:27:41,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647613193] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666392937] [2023-01-28 09:27:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:41,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:41,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:41,669 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 09:27:41,680 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 09:27:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:41,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 09:27:41,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:41,844 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 09:27:41,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:41,886 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 09:27:41,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666392937] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:41,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:41,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 09:27:41,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743224642] [2023-01-28 09:27:41,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:41,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 09:27:41,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 09:27:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 09:27:41,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:41,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 169.625) internal successors, (1357), 8 states have internal predecessors, (1357), 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 09:27:41,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:41,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:41,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:42,015 INFO L130 PetriNetUnfolder]: 106/197 cut-off events. [2023-01-28 09:27:42,015 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-01-28 09:27:42,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 197 events. 106/197 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 622 event pairs, 20 based on Foata normal form. 6/189 useless extension candidates. Maximal degree in co-relation 770. Up to 96 conditions per place. [2023-01-28 09:27:42,017 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 43 selfloop transitions, 8 changer transitions 1/52 dead transitions. [2023-01-28 09:27:42,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 400 flow [2023-01-28 09:27:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:27:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:27:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 875 transitions. [2023-01-28 09:27:42,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42475728155339804 [2023-01-28 09:27:42,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 875 transitions. [2023-01-28 09:27:42,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 875 transitions. [2023-01-28 09:27:42,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:42,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 875 transitions. [2023-01-28 09:27:42,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 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 09:27:42,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:42,030 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:42,030 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 186 flow. Second operand 5 states and 875 transitions. [2023-01-28 09:27:42,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 400 flow [2023-01-28 09:27:42,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 377 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:42,035 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 211 flow [2023-01-28 09:27:42,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-01-28 09:27:42,037 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-01-28 09:27:42,037 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 211 flow [2023-01-28 09:27:42,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 169.625) internal successors, (1357), 8 states have internal predecessors, (1357), 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 09:27:42,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:42,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:42,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 09:27:42,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:42,244 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 09:27:42,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1800513565, now seen corresponding path program 2 times [2023-01-28 09:27:42,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:42,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490226413] [2023-01-28 09:27:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:42,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:42,308 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 09:27:42,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:42,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490226413] [2023-01-28 09:27:42,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490226413] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:42,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597479310] [2023-01-28 09:27:42,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:27:42,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:42,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:42,314 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 09:27:42,317 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 09:27:42,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:27:42,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:42,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 09:27:42,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:42,443 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 09:27:42,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:42,470 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 09:27:42,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597479310] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:42,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:42,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 09:27:42,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246222426] [2023-01-28 09:27:42,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:42,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:27:42,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:27:42,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:27:42,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:42,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 211 flow. Second operand has 10 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 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 09:27:42,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:42,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:42,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:42,613 INFO L130 PetriNetUnfolder]: 124/235 cut-off events. [2023-01-28 09:27:42,613 INFO L131 PetriNetUnfolder]: For 564/564 co-relation queries the response was YES. [2023-01-28 09:27:42,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 235 events. 124/235 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 806 event pairs, 16 based on Foata normal form. 6/227 useless extension candidates. Maximal degree in co-relation 773. Up to 104 conditions per place. [2023-01-28 09:27:42,615 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 54 selfloop transitions, 15 changer transitions 2/71 dead transitions. [2023-01-28 09:27:42,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 71 transitions, 537 flow [2023-01-28 09:27:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 09:27:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 09:27:42,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1397 transitions. [2023-01-28 09:27:42,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238470873786408 [2023-01-28 09:27:42,620 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1397 transitions. [2023-01-28 09:27:42,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1397 transitions. [2023-01-28 09:27:42,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:42,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1397 transitions. [2023-01-28 09:27:42,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 174.625) internal successors, (1397), 8 states have internal predecessors, (1397), 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 09:27:42,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:27:42,632 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:27:42,632 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 211 flow. Second operand 8 states and 1397 transitions. [2023-01-28 09:27:42,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 71 transitions, 537 flow [2023-01-28 09:27:42,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 522 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:42,636 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 302 flow [2023-01-28 09:27:42,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=302, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-01-28 09:27:42,639 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-01-28 09:27:42,639 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 302 flow [2023-01-28 09:27:42,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 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 09:27:42,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:42,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:42,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 09:27:42,845 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,SelfDestructingSolverStorable5 [2023-01-28 09:27:42,845 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 09:27:42,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:42,846 INFO L85 PathProgramCache]: Analyzing trace with hash 113238829, now seen corresponding path program 3 times [2023-01-28 09:27:42,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:42,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222802389] [2023-01-28 09:27:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:42,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:42,904 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 09:27:42,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:42,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222802389] [2023-01-28 09:27:42,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222802389] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:42,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194333932] [2023-01-28 09:27:42,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:27:42,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:42,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:42,906 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 09:27:42,909 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 09:27:42,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 09:27:42,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:42,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 09:27:42,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:43,004 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 09:27:43,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:43,027 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 09:27:43,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194333932] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:43,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:43,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 09:27:43,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999950888] [2023-01-28 09:27:43,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:43,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 09:27:43,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 09:27:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 09:27:43,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:43,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 302 flow. Second operand has 8 states, 8 states have (on average 169.625) internal successors, (1357), 8 states have internal predecessors, (1357), 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 09:27:43,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:43,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:43,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:43,136 INFO L130 PetriNetUnfolder]: 130/245 cut-off events. [2023-01-28 09:27:43,137 INFO L131 PetriNetUnfolder]: For 761/761 co-relation queries the response was YES. [2023-01-28 09:27:43,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 245 events. 130/245 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 847 event pairs, 16 based on Foata normal form. 4/233 useless extension candidates. Maximal degree in co-relation 855. Up to 104 conditions per place. [2023-01-28 09:27:43,138 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 40 selfloop transitions, 13 changer transitions 1/54 dead transitions. [2023-01-28 09:27:43,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 505 flow [2023-01-28 09:27:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:27:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:27:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 871 transitions. [2023-01-28 09:27:43,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228155339805825 [2023-01-28 09:27:43,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 871 transitions. [2023-01-28 09:27:43,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 871 transitions. [2023-01-28 09:27:43,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:43,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 871 transitions. [2023-01-28 09:27:43,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 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 09:27:43,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:43,147 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:43,147 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 302 flow. Second operand 5 states and 871 transitions. [2023-01-28 09:27:43,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 505 flow [2023-01-28 09:27:43,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 482 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 09:27:43,151 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 343 flow [2023-01-28 09:27:43,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2023-01-28 09:27:43,152 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-01-28 09:27:43,152 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 343 flow [2023-01-28 09:27:43,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 169.625) internal successors, (1357), 8 states have internal predecessors, (1357), 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 09:27:43,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:43,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:43,161 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 09:27:43,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:43,361 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 09:27:43,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1270574027, now seen corresponding path program 3 times [2023-01-28 09:27:43,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:43,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502634689] [2023-01-28 09:27:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:43,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:43,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:43,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502634689] [2023-01-28 09:27:43,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502634689] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:27:43,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:27:43,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 09:27:43,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873148463] [2023-01-28 09:27:43,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:27:43,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:27:43,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:43,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:27:43,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:27:43,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:43,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 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 09:27:43,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:43,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:43,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:43,519 INFO L130 PetriNetUnfolder]: 122/229 cut-off events. [2023-01-28 09:27:43,520 INFO L131 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2023-01-28 09:27:43,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 229 events. 122/229 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 763 event pairs, 40 based on Foata normal form. 6/219 useless extension candidates. Maximal degree in co-relation 921. Up to 160 conditions per place. [2023-01-28 09:27:43,522 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 11 changer transitions 9/56 dead transitions. [2023-01-28 09:27:43,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 512 flow [2023-01-28 09:27:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 09:27:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 09:27:43,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1044 transitions. [2023-01-28 09:27:43,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223300970873786 [2023-01-28 09:27:43,525 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1044 transitions. [2023-01-28 09:27:43,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1044 transitions. [2023-01-28 09:27:43,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:43,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1044 transitions. [2023-01-28 09:27:43,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.0) internal successors, (1044), 6 states have internal predecessors, (1044), 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 09:27:43,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 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 09:27:43,532 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 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 09:27:43,532 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 343 flow. Second operand 6 states and 1044 transitions. [2023-01-28 09:27:43,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 512 flow [2023-01-28 09:27:43,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 495 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:43,537 INFO L231 Difference]: Finished difference. Result has 56 places, 34 transitions, 296 flow [2023-01-28 09:27:43,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=56, PETRI_TRANSITIONS=34} [2023-01-28 09:27:43,539 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-01-28 09:27:43,539 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 34 transitions, 296 flow [2023-01-28 09:27:43,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 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 09:27:43,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:43,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:43,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 09:27:43,540 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 09:27:43,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:43,541 INFO L85 PathProgramCache]: Analyzing trace with hash -691740739, now seen corresponding path program 4 times [2023-01-28 09:27:43,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:43,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428937177] [2023-01-28 09:27:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:43,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:43,605 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 09:27:43,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:43,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428937177] [2023-01-28 09:27:43,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428937177] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:43,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328278659] [2023-01-28 09:27:43,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:27:43,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:43,607 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 09:27:43,628 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 09:27:43,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:27:43,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:43,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 09:27:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:43,706 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 09:27:43,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:43,724 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 09:27:43,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328278659] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:43,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:43,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 09:27:43,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695469886] [2023-01-28 09:27:43,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:27:43,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:27:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:27:43,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:43,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 34 transitions, 296 flow. Second operand has 10 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 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 09:27:43,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:43,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:43,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:43,839 INFO L130 PetriNetUnfolder]: 122/219 cut-off events. [2023-01-28 09:27:43,839 INFO L131 PetriNetUnfolder]: For 783/783 co-relation queries the response was YES. [2023-01-28 09:27:43,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 219 events. 122/219 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 669 event pairs, 43 based on Foata normal form. 4/205 useless extension candidates. Maximal degree in co-relation 985. Up to 161 conditions per place. [2023-01-28 09:27:43,841 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 37 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-01-28 09:27:43,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 449 flow [2023-01-28 09:27:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:27:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:27:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 870 transitions. [2023-01-28 09:27:43,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223300970873786 [2023-01-28 09:27:43,844 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 870 transitions. [2023-01-28 09:27:43,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 870 transitions. [2023-01-28 09:27:43,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:43,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 870 transitions. [2023-01-28 09:27:43,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 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 09:27:43,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:43,849 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:43,849 INFO L175 Difference]: Start difference. First operand has 56 places, 34 transitions, 296 flow. Second operand 5 states and 870 transitions. [2023-01-28 09:27:43,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 449 flow [2023-01-28 09:27:43,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 400 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-01-28 09:27:43,853 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 285 flow [2023-01-28 09:27:43,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-01-28 09:27:43,853 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-01-28 09:27:43,853 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 285 flow [2023-01-28 09:27:43,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 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 09:27:43,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:43,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:43,862 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 09:27:44,060 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 09:27:44,060 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 09:27:44,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash -935224503, now seen corresponding path program 4 times [2023-01-28 09:27:44,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:44,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469064959] [2023-01-28 09:27:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:44,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:44,120 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 09:27:44,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:44,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469064959] [2023-01-28 09:27:44,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469064959] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:44,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973225461] [2023-01-28 09:27:44,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:27:44,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:44,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:44,121 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 09:27:44,148 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 09:27:44,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:27:44,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:44,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 09:27:44,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:44,253 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 09:27:44,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:44,275 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 09:27:44,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973225461] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:44,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:44,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 09:27:44,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073282099] [2023-01-28 09:27:44,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:44,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:27:44,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:44,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:27:44,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:27:44,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:44,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 285 flow. Second operand has 10 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 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 09:27:44,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:44,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:44,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:44,382 INFO L130 PetriNetUnfolder]: 114/203 cut-off events. [2023-01-28 09:27:44,382 INFO L131 PetriNetUnfolder]: For 575/575 co-relation queries the response was YES. [2023-01-28 09:27:44,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 203 events. 114/203 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 589 event pairs, 37 based on Foata normal form. 6/191 useless extension candidates. Maximal degree in co-relation 900. Up to 153 conditions per place. [2023-01-28 09:27:44,384 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 33 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2023-01-28 09:27:44,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 408 flow [2023-01-28 09:27:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:27:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:27:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 867 transitions. [2023-01-28 09:27:44,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420873786407767 [2023-01-28 09:27:44,387 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 867 transitions. [2023-01-28 09:27:44,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 867 transitions. [2023-01-28 09:27:44,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:44,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 867 transitions. [2023-01-28 09:27:44,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 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 09:27:44,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:44,392 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 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 09:27:44,392 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 285 flow. Second operand 5 states and 867 transitions. [2023-01-28 09:27:44,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 408 flow [2023-01-28 09:27:44,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 45 transitions, 392 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:44,397 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 282 flow [2023-01-28 09:27:44,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2023-01-28 09:27:44,398 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-01-28 09:27:44,398 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 282 flow [2023-01-28 09:27:44,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 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 09:27:44,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:44,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:44,419 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 09:27:44,616 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 09:27:44,617 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 09:27:44,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:44,617 INFO L85 PathProgramCache]: Analyzing trace with hash 899158593, now seen corresponding path program 5 times [2023-01-28 09:27:44,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:44,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011770680] [2023-01-28 09:27:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:44,672 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 09:27:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:44,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011770680] [2023-01-28 09:27:44,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011770680] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:44,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137954222] [2023-01-28 09:27:44,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:27:44,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:44,674 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 09:27:44,699 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 09:27:44,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:27:44,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:44,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 09:27:44,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:44,787 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 09:27:44,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:44,839 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 09:27:44,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137954222] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:44,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:44,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 09:27:44,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783053840] [2023-01-28 09:27:44,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:44,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:27:44,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:44,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:27:44,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:27:44,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:44,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 282 flow. Second operand has 10 states, 10 states have (on average 169.5) internal successors, (1695), 10 states have internal predecessors, (1695), 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 09:27:44,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:44,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:44,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:44,993 INFO L130 PetriNetUnfolder]: 110/193 cut-off events. [2023-01-28 09:27:44,993 INFO L131 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2023-01-28 09:27:44,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 193 events. 110/193 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 569 event pairs, 9 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 878. Up to 86 conditions per place. [2023-01-28 09:27:44,995 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2023-01-28 09:27:44,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 474 flow [2023-01-28 09:27:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 09:27:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 09:27:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1380 transitions. [2023-01-28 09:27:44,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186893203883495 [2023-01-28 09:27:44,999 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1380 transitions. [2023-01-28 09:27:44,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1380 transitions. [2023-01-28 09:27:45,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:45,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1380 transitions. [2023-01-28 09:27:45,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 172.5) internal successors, (1380), 8 states have internal predecessors, (1380), 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 09:27:45,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:27:45,007 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:27:45,007 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 282 flow. Second operand 8 states and 1380 transitions. [2023-01-28 09:27:45,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 474 flow [2023-01-28 09:27:45,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 426 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-01-28 09:27:45,010 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 277 flow [2023-01-28 09:27:45,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=277, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-01-28 09:27:45,010 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-01-28 09:27:45,011 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 277 flow [2023-01-28 09:27:45,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.5) internal successors, (1695), 10 states have internal predecessors, (1695), 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 09:27:45,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:45,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:45,019 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 09:27:45,217 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 09:27:45,217 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 09:27:45,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:45,218 INFO L85 PathProgramCache]: Analyzing trace with hash -538177452, now seen corresponding path program 1 times [2023-01-28 09:27:45,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:45,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079698250] [2023-01-28 09:27:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:45,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:45,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079698250] [2023-01-28 09:27:45,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079698250] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:45,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244425425] [2023-01-28 09:27:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:45,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:45,599 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 09:27:45,602 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 09:27:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 09:27:45,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:45,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:46,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244425425] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:46,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:46,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 09:27:46,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277607888] [2023-01-28 09:27:46,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:46,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:27:46,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:27:46,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:27:46,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:27:46,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 277 flow. Second operand has 12 states, 12 states have (on average 157.5) internal successors, (1890), 12 states have internal predecessors, (1890), 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 09:27:46,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:46,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:27:46,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:46,220 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2023-01-28 09:27:46,220 INFO L131 PetriNetUnfolder]: For 578/598 co-relation queries the response was YES. [2023-01-28 09:27:46,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 238 events. 132/238 cut-off events. For 578/598 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 814 event pairs, 6 based on Foata normal form. 11/242 useless extension candidates. Maximal degree in co-relation 1030. Up to 167 conditions per place. [2023-01-28 09:27:46,222 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 17 changer transitions 5/64 dead transitions. [2023-01-28 09:27:46,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 519 flow [2023-01-28 09:27:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 09:27:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 09:27:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1125 transitions. [2023-01-28 09:27:46,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39008321775312066 [2023-01-28 09:27:46,226 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1125 transitions. [2023-01-28 09:27:46,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1125 transitions. [2023-01-28 09:27:46,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:46,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1125 transitions. [2023-01-28 09:27:46,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.71428571428572) internal successors, (1125), 7 states have internal predecessors, (1125), 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 09:27:46,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:46,233 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:46,233 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 277 flow. Second operand 7 states and 1125 transitions. [2023-01-28 09:27:46,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 519 flow [2023-01-28 09:27:46,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 470 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-01-28 09:27:46,240 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 370 flow [2023-01-28 09:27:46,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-01-28 09:27:46,241 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2023-01-28 09:27:46,241 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 370 flow [2023-01-28 09:27:46,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 157.5) internal successors, (1890), 12 states have internal predecessors, (1890), 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 09:27:46,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:46,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:46,250 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 09:27:46,450 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 09:27:46,450 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 09:27:46,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:46,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1242983908, now seen corresponding path program 2 times [2023-01-28 09:27:46,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:46,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471478784] [2023-01-28 09:27:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:46,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:46,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:46,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471478784] [2023-01-28 09:27:46,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471478784] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:46,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917215809] [2023-01-28 09:27:46,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:27:46,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:46,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:46,726 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 09:27:46,728 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 09:27:46,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:27:46,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:46,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 09:27:46,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:46,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:47,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917215809] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:47,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:47,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-01-28 09:27:47,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305594309] [2023-01-28 09:27:47,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:47,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 09:27:47,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:47,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 09:27:47,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:27:47,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:27:47,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 370 flow. Second operand has 14 states, 14 states have (on average 157.42857142857142) internal successors, (2204), 14 states have internal predecessors, (2204), 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 09:27:47,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:47,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:27:47,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:47,221 INFO L130 PetriNetUnfolder]: 144/264 cut-off events. [2023-01-28 09:27:47,221 INFO L131 PetriNetUnfolder]: For 828/858 co-relation queries the response was YES. [2023-01-28 09:27:47,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 264 events. 144/264 cut-off events. For 828/858 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 950 event pairs, 8 based on Foata normal form. 11/268 useless extension candidates. Maximal degree in co-relation 1222. Up to 171 conditions per place. [2023-01-28 09:27:47,223 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 40 selfloop transitions, 20 changer transitions 5/71 dead transitions. [2023-01-28 09:27:47,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 604 flow [2023-01-28 09:27:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 09:27:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 09:27:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1130 transitions. [2023-01-28 09:27:47,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39181692094313453 [2023-01-28 09:27:47,226 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1130 transitions. [2023-01-28 09:27:47,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1130 transitions. [2023-01-28 09:27:47,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:47,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1130 transitions. [2023-01-28 09:27:47,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 161.42857142857142) internal successors, (1130), 7 states have internal predecessors, (1130), 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 09:27:47,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:47,232 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:47,232 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 370 flow. Second operand 7 states and 1130 transitions. [2023-01-28 09:27:47,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 604 flow [2023-01-28 09:27:47,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 571 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:47,236 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 439 flow [2023-01-28 09:27:47,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-01-28 09:27:47,237 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-01-28 09:27:47,237 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 439 flow [2023-01-28 09:27:47,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 157.42857142857142) internal successors, (2204), 14 states have internal predecessors, (2204), 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 09:27:47,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:47,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:47,244 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 09:27:47,445 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 09:27:47,445 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 09:27:47,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:47,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278278, now seen corresponding path program 3 times [2023-01-28 09:27:47,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:47,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769614153] [2023-01-28 09:27:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:47,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:47,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:47,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769614153] [2023-01-28 09:27:47,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769614153] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:47,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279259605] [2023-01-28 09:27:47,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:27:47,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:47,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:47,749 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 09:27:47,751 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 09:27:47,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:27:47,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 09:27:47,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:47,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:48,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279259605] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:48,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:48,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 09:27:48,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329102815] [2023-01-28 09:27:48,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:48,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:27:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:27:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:27:48,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:27:48,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 439 flow. Second operand has 12 states, 12 states have (on average 157.66666666666666) internal successors, (1892), 12 states have internal predecessors, (1892), 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 09:27:48,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:48,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:27:48,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:48,269 INFO L130 PetriNetUnfolder]: 141/255 cut-off events. [2023-01-28 09:27:48,269 INFO L131 PetriNetUnfolder]: For 1187/1213 co-relation queries the response was YES. [2023-01-28 09:27:48,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 255 events. 141/255 cut-off events. For 1187/1213 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 900 event pairs, 8 based on Foata normal form. 9/257 useless extension candidates. Maximal degree in co-relation 1269. Up to 171 conditions per place. [2023-01-28 09:27:48,271 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 21 changer transitions 5/68 dead transitions. [2023-01-28 09:27:48,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 636 flow [2023-01-28 09:27:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 09:27:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 09:27:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1126 transitions. [2023-01-28 09:27:48,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39042995839112343 [2023-01-28 09:27:48,274 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1126 transitions. [2023-01-28 09:27:48,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1126 transitions. [2023-01-28 09:27:48,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:48,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1126 transitions. [2023-01-28 09:27:48,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.85714285714286) internal successors, (1126), 7 states have internal predecessors, (1126), 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 09:27:48,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:48,280 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:48,280 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 439 flow. Second operand 7 states and 1126 transitions. [2023-01-28 09:27:48,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 636 flow [2023-01-28 09:27:48,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 68 transitions, 578 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-01-28 09:27:48,284 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 471 flow [2023-01-28 09:27:48,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=471, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-01-28 09:27:48,285 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 45 predicate places. [2023-01-28 09:27:48,285 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 471 flow [2023-01-28 09:27:48,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 157.66666666666666) internal successors, (1892), 12 states have internal predecessors, (1892), 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 09:27:48,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:48,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:48,293 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 09:27:48,491 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 09:27:48,491 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 09:27:48,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:48,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1742862228, now seen corresponding path program 4 times [2023-01-28 09:27:48,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:48,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111946313] [2023-01-28 09:27:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:48,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:48,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:48,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111946313] [2023-01-28 09:27:48,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111946313] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:48,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653659920] [2023-01-28 09:27:48,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:27:48,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:48,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:48,872 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 09:27:48,878 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 09:27:48,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:27:48,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 09:27:48,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:49,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:49,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653659920] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:49,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:49,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 09:27:49,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385537508] [2023-01-28 09:27:49,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:49,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:27:49,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:27:49,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:27:49,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:27:49,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 471 flow. Second operand has 10 states, 10 states have (on average 157.5) internal successors, (1575), 10 states have internal predecessors, (1575), 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 09:27:49,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:49,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:27:49,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:49,416 INFO L130 PetriNetUnfolder]: 166/298 cut-off events. [2023-01-28 09:27:49,416 INFO L131 PetriNetUnfolder]: For 1428/1454 co-relation queries the response was YES. [2023-01-28 09:27:49,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 298 events. 166/298 cut-off events. For 1428/1454 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1112 event pairs, 10 based on Foata normal form. 9/300 useless extension candidates. Maximal degree in co-relation 1533. Up to 244 conditions per place. [2023-01-28 09:27:49,418 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 44 selfloop transitions, 17 changer transitions 5/72 dead transitions. [2023-01-28 09:27:49,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 723 flow [2023-01-28 09:27:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 09:27:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 09:27:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1117 transitions. [2023-01-28 09:27:49,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38730929264909847 [2023-01-28 09:27:49,422 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1117 transitions. [2023-01-28 09:27:49,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1117 transitions. [2023-01-28 09:27:49,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:49,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1117 transitions. [2023-01-28 09:27:49,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.57142857142858) internal successors, (1117), 7 states have internal predecessors, (1117), 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 09:27:49,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:49,427 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:49,427 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 471 flow. Second operand 7 states and 1117 transitions. [2023-01-28 09:27:49,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 723 flow [2023-01-28 09:27:49,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 674 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-01-28 09:27:49,434 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 574 flow [2023-01-28 09:27:49,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=574, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-01-28 09:27:49,435 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 49 predicate places. [2023-01-28 09:27:49,435 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 574 flow [2023-01-28 09:27:49,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 157.5) internal successors, (1575), 10 states have internal predecessors, (1575), 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 09:27:49,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:49,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:49,445 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 09:27:49,642 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 09:27:49,642 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 09:27:49,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:49,643 INFO L85 PathProgramCache]: Analyzing trace with hash -433241830, now seen corresponding path program 5 times [2023-01-28 09:27:49,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:49,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131478887] [2023-01-28 09:27:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:49,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:49,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:49,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131478887] [2023-01-28 09:27:49,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131478887] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:49,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927211044] [2023-01-28 09:27:49,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:27:49,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:49,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:49,907 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 09:27:49,910 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 09:27:49,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:27:49,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:49,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 09:27:49,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:50,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:50,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927211044] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:50,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:50,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-01-28 09:27:50,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66294964] [2023-01-28 09:27:50,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:50,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 09:27:50,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:50,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 09:27:50,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:27:50,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:27:50,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 574 flow. Second operand has 14 states, 14 states have (on average 157.42857142857142) internal successors, (2204), 14 states have internal predecessors, (2204), 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 09:27:50,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:50,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:27:50,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:50,441 INFO L130 PetriNetUnfolder]: 180/326 cut-off events. [2023-01-28 09:27:50,441 INFO L131 PetriNetUnfolder]: For 1850/1876 co-relation queries the response was YES. [2023-01-28 09:27:50,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 326 events. 180/326 cut-off events. For 1850/1876 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1257 event pairs, 14 based on Foata normal form. 9/328 useless extension candidates. Maximal degree in co-relation 1754. Up to 248 conditions per place. [2023-01-28 09:27:50,444 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 50 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2023-01-28 09:27:50,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 81 transitions, 837 flow [2023-01-28 09:27:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 09:27:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 09:27:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1124 transitions. [2023-01-28 09:27:50,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897364771151179 [2023-01-28 09:27:50,447 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1124 transitions. [2023-01-28 09:27:50,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1124 transitions. [2023-01-28 09:27:50,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:50,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1124 transitions. [2023-01-28 09:27:50,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.57142857142858) internal successors, (1124), 7 states have internal predecessors, (1124), 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 09:27:50,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:50,452 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:50,453 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 574 flow. Second operand 7 states and 1124 transitions. [2023-01-28 09:27:50,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 81 transitions, 837 flow [2023-01-28 09:27:50,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 796 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:50,459 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 651 flow [2023-01-28 09:27:50,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=651, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-01-28 09:27:50,460 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-01-28 09:27:50,460 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 651 flow [2023-01-28 09:27:50,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 157.42857142857142) internal successors, (2204), 14 states have internal predecessors, (2204), 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 09:27:50,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:50,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:50,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:50,666 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 09:27:50,666 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 09:27:50,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:50,667 INFO L85 PathProgramCache]: Analyzing trace with hash -405536200, now seen corresponding path program 6 times [2023-01-28 09:27:50,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:50,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689001589] [2023-01-28 09:27:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:50,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:50,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689001589] [2023-01-28 09:27:50,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689001589] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113448403] [2023-01-28 09:27:50,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:27:50,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:50,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:50,916 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:50,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 09:27:50,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 09:27:50,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 09:27:50,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:51,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:51,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113448403] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:51,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:51,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-01-28 09:27:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894159828] [2023-01-28 09:27:51,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:51,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 09:27:51,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:51,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 09:27:51,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:27:51,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:27:51,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 651 flow. Second operand has 14 states, 14 states have (on average 157.42857142857142) internal successors, (2204), 14 states have internal predecessors, (2204), 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 09:27:51,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:51,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:27:51,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:51,463 INFO L130 PetriNetUnfolder]: 177/317 cut-off events. [2023-01-28 09:27:51,463 INFO L131 PetriNetUnfolder]: For 2219/2245 co-relation queries the response was YES. [2023-01-28 09:27:51,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 317 events. 177/317 cut-off events. For 2219/2245 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1211 event pairs, 14 based on Foata normal form. 9/319 useless extension candidates. Maximal degree in co-relation 1777. Up to 248 conditions per place. [2023-01-28 09:27:51,466 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 48 selfloop transitions, 21 changer transitions 5/80 dead transitions. [2023-01-28 09:27:51,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 874 flow [2023-01-28 09:27:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 09:27:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 09:27:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1122 transitions. [2023-01-28 09:27:51,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38904299583911234 [2023-01-28 09:27:51,471 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1122 transitions. [2023-01-28 09:27:51,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1122 transitions. [2023-01-28 09:27:51,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:51,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1122 transitions. [2023-01-28 09:27:51,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.28571428571428) internal successors, (1122), 7 states have internal predecessors, (1122), 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 09:27:51,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:51,478 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:51,478 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 651 flow. Second operand 7 states and 1122 transitions. [2023-01-28 09:27:51,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 874 flow [2023-01-28 09:27:51,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 794 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-01-28 09:27:51,486 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 671 flow [2023-01-28 09:27:51,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=671, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2023-01-28 09:27:51,487 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-01-28 09:27:51,487 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 671 flow [2023-01-28 09:27:51,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 157.42857142857142) internal successors, (2204), 14 states have internal predecessors, (2204), 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 09:27:51,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:51,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:51,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:51,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 09:27:51,694 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:51,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash -292778433, now seen corresponding path program 7 times [2023-01-28 09:27:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:51,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815792890] [2023-01-28 09:27:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:51,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:51,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:51,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815792890] [2023-01-28 09:27:51,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815792890] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:51,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001500118] [2023-01-28 09:27:51,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:27:51,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:51,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:51,781 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:51,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 09:27:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:51,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:27:51,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:51,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001500118] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:51,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:51,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 09:27:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338560468] [2023-01-28 09:27:51,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:51,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 09:27:51,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:51,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 09:27:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-28 09:27:51,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:51,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 671 flow. Second operand has 11 states, 11 states have (on average 169.1818181818182) internal successors, (1861), 11 states have internal predecessors, (1861), 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 09:27:51,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:51,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:51,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:52,135 INFO L130 PetriNetUnfolder]: 228/403 cut-off events. [2023-01-28 09:27:52,135 INFO L131 PetriNetUnfolder]: For 2406/2406 co-relation queries the response was YES. [2023-01-28 09:27:52,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 403 events. 228/403 cut-off events. For 2406/2406 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1569 event pairs, 15 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 2221. Up to 154 conditions per place. [2023-01-28 09:27:52,139 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 75 selfloop transitions, 28 changer transitions 0/103 dead transitions. [2023-01-28 09:27:52,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 1146 flow [2023-01-28 09:27:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 09:27:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 09:27:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1222 transitions. [2023-01-28 09:27:52,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237170596393897 [2023-01-28 09:27:52,141 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1222 transitions. [2023-01-28 09:27:52,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1222 transitions. [2023-01-28 09:27:52,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:52,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1222 transitions. [2023-01-28 09:27:52,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 174.57142857142858) internal successors, (1222), 7 states have internal predecessors, (1222), 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 09:27:52,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:52,146 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:27:52,146 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 671 flow. Second operand 7 states and 1222 transitions. [2023-01-28 09:27:52,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 1146 flow [2023-01-28 09:27:52,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 103 transitions, 1081 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-01-28 09:27:52,159 INFO L231 Difference]: Finished difference. Result has 85 places, 71 transitions, 764 flow [2023-01-28 09:27:52,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=85, PETRI_TRANSITIONS=71} [2023-01-28 09:27:52,159 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-01-28 09:27:52,159 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 71 transitions, 764 flow [2023-01-28 09:27:52,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.1818181818182) internal successors, (1861), 11 states have internal predecessors, (1861), 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 09:27:52,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:52,160 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:52,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 09:27:52,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 09:27:52,366 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:52,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash 588770887, now seen corresponding path program 8 times [2023-01-28 09:27:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:52,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407273703] [2023-01-28 09:27:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:52,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:52,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:52,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407273703] [2023-01-28 09:27:52,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407273703] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:52,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797433930] [2023-01-28 09:27:52,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:27:52,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:52,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:52,431 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:52,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 09:27:52,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:27:52,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:52,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:27:52,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:52,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:52,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797433930] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:52,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:52,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 09:27:52,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010527562] [2023-01-28 09:27:52,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:52,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 09:27:52,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:52,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 09:27:52,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 09:27:52,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:52,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 71 transitions, 764 flow. Second operand has 11 states, 11 states have (on average 169.36363636363637) internal successors, (1863), 11 states have internal predecessors, (1863), 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 09:27:52,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:52,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:52,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:52,799 INFO L130 PetriNetUnfolder]: 230/413 cut-off events. [2023-01-28 09:27:52,800 INFO L131 PetriNetUnfolder]: For 3259/3259 co-relation queries the response was YES. [2023-01-28 09:27:52,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 413 events. 230/413 cut-off events. For 3259/3259 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1669 event pairs, 35 based on Foata normal form. 4/417 useless extension candidates. Maximal degree in co-relation 2400. Up to 153 conditions per place. [2023-01-28 09:27:52,804 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 65 selfloop transitions, 43 changer transitions 10/118 dead transitions. [2023-01-28 09:27:52,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 1335 flow [2023-01-28 09:27:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 09:27:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 09:27:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1899 transitions. [2023-01-28 09:27:52,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41902030008826124 [2023-01-28 09:27:52,807 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1899 transitions. [2023-01-28 09:27:52,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1899 transitions. [2023-01-28 09:27:52,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:52,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1899 transitions. [2023-01-28 09:27:52,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 172.63636363636363) internal successors, (1899), 11 states have internal predecessors, (1899), 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 09:27:52,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:27:52,815 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:27:52,815 INFO L175 Difference]: Start difference. First operand has 85 places, 71 transitions, 764 flow. Second operand 11 states and 1899 transitions. [2023-01-28 09:27:52,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 1335 flow [2023-01-28 09:27:52,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 118 transitions, 1288 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:52,827 INFO L231 Difference]: Finished difference. Result has 98 places, 83 transitions, 1012 flow [2023-01-28 09:27:52,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1012, PETRI_PLACES=98, PETRI_TRANSITIONS=83} [2023-01-28 09:27:52,827 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 78 predicate places. [2023-01-28 09:27:52,828 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 83 transitions, 1012 flow [2023-01-28 09:27:52,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.36363636363637) internal successors, (1863), 11 states have internal predecessors, (1863), 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 09:27:52,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:52,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:52,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:53,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:53,038 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:53,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:53,038 INFO L85 PathProgramCache]: Analyzing trace with hash 84514537, now seen corresponding path program 9 times [2023-01-28 09:27:53,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:53,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707725330] [2023-01-28 09:27:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:53,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:53,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:53,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707725330] [2023-01-28 09:27:53,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707725330] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:53,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014158601] [2023-01-28 09:27:53,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:27:53,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:53,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:53,103 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:53,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 09:27:53,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 09:27:53,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:53,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:27:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:53,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:53,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014158601] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:53,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:53,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-28 09:27:53,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208066074] [2023-01-28 09:27:53,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:53,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:27:53,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:53,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:27:53,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:27:53,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:53,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 83 transitions, 1012 flow. Second operand has 13 states, 13 states have (on average 169.15384615384616) internal successors, (2199), 13 states have internal predecessors, (2199), 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 09:27:53,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:53,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:53,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:53,635 INFO L130 PetriNetUnfolder]: 265/492 cut-off events. [2023-01-28 09:27:53,636 INFO L131 PetriNetUnfolder]: For 4464/4464 co-relation queries the response was YES. [2023-01-28 09:27:53,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 492 events. 265/492 cut-off events. For 4464/4464 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2134 event pairs, 37 based on Foata normal form. 8/500 useless extension candidates. Maximal degree in co-relation 3028. Up to 159 conditions per place. [2023-01-28 09:27:53,641 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 91 selfloop transitions, 64 changer transitions 6/161 dead transitions. [2023-01-28 09:27:53,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1910 flow [2023-01-28 09:27:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 09:27:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 09:27:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3102 transitions. [2023-01-28 09:27:53,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41828478964401294 [2023-01-28 09:27:53,645 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3102 transitions. [2023-01-28 09:27:53,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3102 transitions. [2023-01-28 09:27:53,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:53,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3102 transitions. [2023-01-28 09:27:53,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 172.33333333333334) internal successors, (3102), 18 states have internal predecessors, (3102), 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 09:27:53,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 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 09:27:53,660 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 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 09:27:53,660 INFO L175 Difference]: Start difference. First operand has 98 places, 83 transitions, 1012 flow. Second operand 18 states and 3102 transitions. [2023-01-28 09:27:53,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1910 flow [2023-01-28 09:27:53,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1767 flow, removed 45 selfloop flow, removed 8 redundant places. [2023-01-28 09:27:53,678 INFO L231 Difference]: Finished difference. Result has 111 places, 103 transitions, 1356 flow [2023-01-28 09:27:53,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1356, PETRI_PLACES=111, PETRI_TRANSITIONS=103} [2023-01-28 09:27:53,679 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2023-01-28 09:27:53,679 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 103 transitions, 1356 flow [2023-01-28 09:27:53,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.15384615384616) internal successors, (2199), 13 states have internal predecessors, (2199), 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 09:27:53,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:53,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:53,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:53,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:53,892 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:53,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:53,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1635873767, now seen corresponding path program 10 times [2023-01-28 09:27:53,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:53,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079778186] [2023-01-28 09:27:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:53,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:53,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:53,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079778186] [2023-01-28 09:27:53,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079778186] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:53,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852752808] [2023-01-28 09:27:53,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:27:53,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:53,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:53,961 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:53,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 09:27:54,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:27:54,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:54,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:27:54,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:54,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:54,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852752808] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:54,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:54,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 09:27:54,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611359005] [2023-01-28 09:27:54,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:54,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:27:54,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:54,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:27:54,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:27:54,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:54,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 103 transitions, 1356 flow. Second operand has 12 states, 12 states have (on average 169.33333333333334) internal successors, (2032), 12 states have internal predecessors, (2032), 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 09:27:54,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:54,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:54,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:54,483 INFO L130 PetriNetUnfolder]: 316/591 cut-off events. [2023-01-28 09:27:54,484 INFO L131 PetriNetUnfolder]: For 6497/6497 co-relation queries the response was YES. [2023-01-28 09:27:54,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3908 conditions, 591 events. 316/591 cut-off events. For 6497/6497 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2656 event pairs, 19 based on Foata normal form. 18/609 useless extension candidates. Maximal degree in co-relation 3866. Up to 303 conditions per place. [2023-01-28 09:27:54,491 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 119 selfloop transitions, 50 changer transitions 0/169 dead transitions. [2023-01-28 09:27:54,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 169 transitions, 2245 flow [2023-01-28 09:27:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 09:27:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 09:27:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2431 transitions. [2023-01-28 09:27:54,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214632454923717 [2023-01-28 09:27:54,494 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2431 transitions. [2023-01-28 09:27:54,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2431 transitions. [2023-01-28 09:27:54,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:54,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2431 transitions. [2023-01-28 09:27:54,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.64285714285714) internal successors, (2431), 14 states have internal predecessors, (2431), 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 09:27:54,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 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 09:27:54,502 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 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 09:27:54,502 INFO L175 Difference]: Start difference. First operand has 111 places, 103 transitions, 1356 flow. Second operand 14 states and 2431 transitions. [2023-01-28 09:27:54,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 169 transitions, 2245 flow [2023-01-28 09:27:54,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 2079 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-01-28 09:27:54,526 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 1586 flow [2023-01-28 09:27:54,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1586, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2023-01-28 09:27:54,526 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-01-28 09:27:54,527 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 1586 flow [2023-01-28 09:27:54,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.33333333333334) internal successors, (2032), 12 states have internal predecessors, (2032), 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 09:27:54,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:54,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:54,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:54,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:54,734 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:54,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:54,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1629563245, now seen corresponding path program 11 times [2023-01-28 09:27:54,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:54,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491238626] [2023-01-28 09:27:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:54,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:54,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:54,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491238626] [2023-01-28 09:27:54,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491238626] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:54,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554044390] [2023-01-28 09:27:54,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:27:54,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:54,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:54,806 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:54,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 09:27:54,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:27:54,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:54,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:27:54,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:54,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:54,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554044390] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:54,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:54,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 09:27:54,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584631497] [2023-01-28 09:27:54,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:54,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:27:54,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:54,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:27:54,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:27:54,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:54,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 1586 flow. Second operand has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 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 09:27:54,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:54,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:54,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:55,311 INFO L130 PetriNetUnfolder]: 391/758 cut-off events. [2023-01-28 09:27:55,312 INFO L131 PetriNetUnfolder]: For 10396/10396 co-relation queries the response was YES. [2023-01-28 09:27:55,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5484 conditions, 758 events. 391/758 cut-off events. For 10396/10396 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3764 event pairs, 81 based on Foata normal form. 8/766 useless extension candidates. Maximal degree in co-relation 5438. Up to 329 conditions per place. [2023-01-28 09:27:55,320 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 116 selfloop transitions, 62 changer transitions 0/178 dead transitions. [2023-01-28 09:27:55,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 178 transitions, 2519 flow [2023-01-28 09:27:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 09:27:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 09:27:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2262 transitions. [2023-01-28 09:27:55,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223300970873786 [2023-01-28 09:27:55,325 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2262 transitions. [2023-01-28 09:27:55,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2262 transitions. [2023-01-28 09:27:55,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:55,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2262 transitions. [2023-01-28 09:27:55,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 174.0) internal successors, (2262), 13 states have internal predecessors, (2262), 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 09:27:55,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 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 09:27:55,332 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 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 09:27:55,333 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 1586 flow. Second operand 13 states and 2262 transitions. [2023-01-28 09:27:55,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 178 transitions, 2519 flow [2023-01-28 09:27:55,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 2287 flow, removed 96 selfloop flow, removed 5 redundant places. [2023-01-28 09:27:55,368 INFO L231 Difference]: Finished difference. Result has 133 places, 131 transitions, 1857 flow [2023-01-28 09:27:55,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1857, PETRI_PLACES=133, PETRI_TRANSITIONS=131} [2023-01-28 09:27:55,368 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-01-28 09:27:55,368 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 131 transitions, 1857 flow [2023-01-28 09:27:55,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 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 09:27:55,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:55,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:55,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:55,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:55,575 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:55,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:55,576 INFO L85 PathProgramCache]: Analyzing trace with hash 608008723, now seen corresponding path program 12 times [2023-01-28 09:27:55,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:55,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881191268] [2023-01-28 09:27:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:55,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:55,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:55,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881191268] [2023-01-28 09:27:55,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881191268] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:55,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638399984] [2023-01-28 09:27:55,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:27:55,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:55,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:55,635 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:55,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 09:27:55,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 09:27:55,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:55,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:27:55,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:55,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:55,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638399984] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:55,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:55,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 09:27:55,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491304848] [2023-01-28 09:27:55,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:55,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:27:55,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:55,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:27:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:27:55,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:55,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 131 transitions, 1857 flow. Second operand has 12 states, 12 states have (on average 169.16666666666666) internal successors, (2030), 12 states have internal predecessors, (2030), 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 09:27:55,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:55,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:55,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:56,220 INFO L130 PetriNetUnfolder]: 387/752 cut-off events. [2023-01-28 09:27:56,220 INFO L131 PetriNetUnfolder]: For 10139/10139 co-relation queries the response was YES. [2023-01-28 09:27:56,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5345 conditions, 752 events. 387/752 cut-off events. For 10139/10139 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3731 event pairs, 57 based on Foata normal form. 16/764 useless extension candidates. Maximal degree in co-relation 5292. Up to 243 conditions per place. [2023-01-28 09:27:56,229 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 114 selfloop transitions, 71 changer transitions 2/187 dead transitions. [2023-01-28 09:27:56,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 187 transitions, 2623 flow [2023-01-28 09:27:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 09:27:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 09:27:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3109 transitions. [2023-01-28 09:27:56,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192286947141316 [2023-01-28 09:27:56,233 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3109 transitions. [2023-01-28 09:27:56,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3109 transitions. [2023-01-28 09:27:56,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:56,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3109 transitions. [2023-01-28 09:27:56,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 172.72222222222223) internal successors, (3109), 18 states have internal predecessors, (3109), 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 09:27:56,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 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 09:27:56,245 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 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 09:27:56,245 INFO L175 Difference]: Start difference. First operand has 133 places, 131 transitions, 1857 flow. Second operand 18 states and 3109 transitions. [2023-01-28 09:27:56,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 187 transitions, 2623 flow [2023-01-28 09:27:56,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 187 transitions, 2501 flow, removed 48 selfloop flow, removed 4 redundant places. [2023-01-28 09:27:56,277 INFO L231 Difference]: Finished difference. Result has 148 places, 131 transitions, 1976 flow [2023-01-28 09:27:56,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1976, PETRI_PLACES=148, PETRI_TRANSITIONS=131} [2023-01-28 09:27:56,278 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 128 predicate places. [2023-01-28 09:27:56,278 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 131 transitions, 1976 flow [2023-01-28 09:27:56,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.16666666666666) internal successors, (2030), 12 states have internal predecessors, (2030), 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 09:27:56,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:56,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:56,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:56,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:56,489 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:56,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:56,490 INFO L85 PathProgramCache]: Analyzing trace with hash -844138731, now seen corresponding path program 13 times [2023-01-28 09:27:56,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:56,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862466216] [2023-01-28 09:27:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:56,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:56,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:56,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862466216] [2023-01-28 09:27:56,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862466216] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:56,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451087828] [2023-01-28 09:27:56,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:27:56,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:56,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:56,552 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:56,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 09:27:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:56,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:27:56,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:56,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451087828] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:56,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:56,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 09:27:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068766816] [2023-01-28 09:27:56,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:27:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:27:56,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:27:56,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:56,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 131 transitions, 1976 flow. Second operand has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 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 09:27:56,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:56,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:56,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:57,145 INFO L130 PetriNetUnfolder]: 388/747 cut-off events. [2023-01-28 09:27:57,146 INFO L131 PetriNetUnfolder]: For 10712/10712 co-relation queries the response was YES. [2023-01-28 09:27:57,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5438 conditions, 747 events. 388/747 cut-off events. For 10712/10712 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3679 event pairs, 13 based on Foata normal form. 6/749 useless extension candidates. Maximal degree in co-relation 5382. Up to 203 conditions per place. [2023-01-28 09:27:57,158 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 123 selfloop transitions, 86 changer transitions 2/211 dead transitions. [2023-01-28 09:27:57,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 211 transitions, 3237 flow [2023-01-28 09:27:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 09:27:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 09:27:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3267 transitions. [2023-01-28 09:27:57,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41734798160449665 [2023-01-28 09:27:57,165 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3267 transitions. [2023-01-28 09:27:57,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3267 transitions. [2023-01-28 09:27:57,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:57,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3267 transitions. [2023-01-28 09:27:57,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 171.94736842105263) internal successors, (3267), 19 states have internal predecessors, (3267), 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 09:27:57,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 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 09:27:57,178 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 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 09:27:57,179 INFO L175 Difference]: Start difference. First operand has 148 places, 131 transitions, 1976 flow. Second operand 19 states and 3267 transitions. [2023-01-28 09:27:57,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 211 transitions, 3237 flow [2023-01-28 09:27:57,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 211 transitions, 2965 flow, removed 91 selfloop flow, removed 10 redundant places. [2023-01-28 09:27:57,222 INFO L231 Difference]: Finished difference. Result has 157 places, 157 transitions, 2334 flow [2023-01-28 09:27:57,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2334, PETRI_PLACES=157, PETRI_TRANSITIONS=157} [2023-01-28 09:27:57,223 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 137 predicate places. [2023-01-28 09:27:57,223 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 157 transitions, 2334 flow [2023-01-28 09:27:57,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 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 09:27:57,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:57,223 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:57,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:57,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:57,429 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:57,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:57,430 INFO L85 PathProgramCache]: Analyzing trace with hash -205590883, now seen corresponding path program 14 times [2023-01-28 09:27:57,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:57,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096601785] [2023-01-28 09:27:57,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:57,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:57,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:57,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096601785] [2023-01-28 09:27:57,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096601785] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:57,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752358973] [2023-01-28 09:27:57,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:27:57,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:57,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:57,495 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:57,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 09:27:57,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:27:57,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:27:57,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:57,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:57,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752358973] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:57,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:57,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 09:27:57,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938988213] [2023-01-28 09:27:57,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:57,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:27:57,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:57,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:27:57,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:27:57,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:57,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 157 transitions, 2334 flow. Second operand has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:27:57,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:57,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:57,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:58,032 INFO L130 PetriNetUnfolder]: 564/1111 cut-off events. [2023-01-28 09:27:58,033 INFO L131 PetriNetUnfolder]: For 18104/18104 co-relation queries the response was YES. [2023-01-28 09:27:58,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8133 conditions, 1111 events. 564/1111 cut-off events. For 18104/18104 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6245 event pairs, 45 based on Foata normal form. 18/1121 useless extension candidates. Maximal degree in co-relation 8074. Up to 406 conditions per place. [2023-01-28 09:27:58,054 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 152 selfloop transitions, 117 changer transitions 0/269 dead transitions. [2023-01-28 09:27:58,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 269 transitions, 4223 flow [2023-01-28 09:27:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 09:27:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 09:27:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2607 transitions. [2023-01-28 09:27:58,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42184466019417477 [2023-01-28 09:27:58,057 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2607 transitions. [2023-01-28 09:27:58,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2607 transitions. [2023-01-28 09:27:58,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:58,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2607 transitions. [2023-01-28 09:27:58,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 173.8) internal successors, (2607), 15 states have internal predecessors, (2607), 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 09:27:58,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 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 09:27:58,066 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 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 09:27:58,066 INFO L175 Difference]: Start difference. First operand has 157 places, 157 transitions, 2334 flow. Second operand 15 states and 2607 transitions. [2023-01-28 09:27:58,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 269 transitions, 4223 flow [2023-01-28 09:27:58,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 269 transitions, 3910 flow, removed 129 selfloop flow, removed 8 redundant places. [2023-01-28 09:27:58,135 INFO L231 Difference]: Finished difference. Result has 168 places, 203 transitions, 3262 flow [2023-01-28 09:27:58,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3262, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2023-01-28 09:27:58,136 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-01-28 09:27:58,136 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 3262 flow [2023-01-28 09:27:58,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:27:58,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:58,137 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:58,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:58,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-01-28 09:27:58,343 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:58,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:58,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1054951077, now seen corresponding path program 15 times [2023-01-28 09:27:58,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:58,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741167112] [2023-01-28 09:27:58,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:58,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:58,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:58,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741167112] [2023-01-28 09:27:58,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741167112] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:58,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086414049] [2023-01-28 09:27:58,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:27:58,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:58,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:58,421 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:58,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 09:27:58,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 09:27:58,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:58,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:27:58,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:58,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:27:58,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086414049] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:58,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:58,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 09:27:58,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522501778] [2023-01-28 09:27:58,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:58,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:27:58,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:58,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:27:58,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:27:58,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:58,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 3262 flow. Second operand has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:27:58,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:58,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:58,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:59,176 INFO L130 PetriNetUnfolder]: 566/1133 cut-off events. [2023-01-28 09:27:59,176 INFO L131 PetriNetUnfolder]: For 19342/19342 co-relation queries the response was YES. [2023-01-28 09:27:59,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8557 conditions, 1133 events. 566/1133 cut-off events. For 19342/19342 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6498 event pairs, 23 based on Foata normal form. 6/1139 useless extension candidates. Maximal degree in co-relation 8496. Up to 342 conditions per place. [2023-01-28 09:27:59,189 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 148 selfloop transitions, 127 changer transitions 2/277 dead transitions. [2023-01-28 09:27:59,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 277 transitions, 4574 flow [2023-01-28 09:27:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 09:27:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 09:27:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3615 transitions. [2023-01-28 09:27:59,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41782246879334256 [2023-01-28 09:27:59,194 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3615 transitions. [2023-01-28 09:27:59,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3615 transitions. [2023-01-28 09:27:59,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:59,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3615 transitions. [2023-01-28 09:27:59,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 172.14285714285714) internal successors, (3615), 21 states have internal predecessors, (3615), 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 09:27:59,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 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 09:27:59,206 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 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 09:27:59,206 INFO L175 Difference]: Start difference. First operand has 168 places, 203 transitions, 3262 flow. Second operand 21 states and 3615 transitions. [2023-01-28 09:27:59,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 277 transitions, 4574 flow [2023-01-28 09:27:59,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 277 transitions, 4415 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-01-28 09:27:59,295 INFO L231 Difference]: Finished difference. Result has 188 places, 211 transitions, 3597 flow [2023-01-28 09:27:59,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3597, PETRI_PLACES=188, PETRI_TRANSITIONS=211} [2023-01-28 09:27:59,296 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 168 predicate places. [2023-01-28 09:27:59,296 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 211 transitions, 3597 flow [2023-01-28 09:27:59,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:27:59,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:59,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:59,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:59,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 09:27:59,502 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:59,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:59,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1615313315, now seen corresponding path program 16 times [2023-01-28 09:27:59,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:59,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851974833] [2023-01-28 09:27:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:59,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:59,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:59,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851974833] [2023-01-28 09:27:59,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851974833] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766651763] [2023-01-28 09:27:59,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:27:59,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:59,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:59,570 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:59,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 09:27:59,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:27:59,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:27:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:59,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:59,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766651763] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:59,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:59,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 09:27:59,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118685961] [2023-01-28 09:27:59,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:59,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:27:59,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:59,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:27:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:27:59,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:27:59,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 211 transitions, 3597 flow. Second operand has 15 states, 15 states have (on average 168.73333333333332) internal successors, (2531), 15 states have internal predecessors, (2531), 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 09:27:59,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:59,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:27:59,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:00,326 INFO L130 PetriNetUnfolder]: 629/1260 cut-off events. [2023-01-28 09:28:00,326 INFO L131 PetriNetUnfolder]: For 23382/23382 co-relation queries the response was YES. [2023-01-28 09:28:00,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 1260 events. 629/1260 cut-off events. For 23382/23382 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7379 event pairs, 27 based on Foata normal form. 6/1266 useless extension candidates. Maximal degree in co-relation 9912. Up to 359 conditions per place. [2023-01-28 09:28:00,342 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 147 selfloop transitions, 141 changer transitions 4/292 dead transitions. [2023-01-28 09:28:00,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 292 transitions, 5271 flow [2023-01-28 09:28:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 09:28:00,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 09:28:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3438 transitions. [2023-01-28 09:28:00,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172330097087379 [2023-01-28 09:28:00,352 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3438 transitions. [2023-01-28 09:28:00,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3438 transitions. [2023-01-28 09:28:00,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:00,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3438 transitions. [2023-01-28 09:28:00,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 171.9) internal successors, (3438), 20 states have internal predecessors, (3438), 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 09:28:00,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 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 09:28:00,397 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 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 09:28:00,397 INFO L175 Difference]: Start difference. First operand has 188 places, 211 transitions, 3597 flow. Second operand 20 states and 3438 transitions. [2023-01-28 09:28:00,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 292 transitions, 5271 flow [2023-01-28 09:28:00,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 292 transitions, 4963 flow, removed 126 selfloop flow, removed 7 redundant places. [2023-01-28 09:28:00,496 INFO L231 Difference]: Finished difference. Result has 205 places, 234 transitions, 4307 flow [2023-01-28 09:28:00,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4307, PETRI_PLACES=205, PETRI_TRANSITIONS=234} [2023-01-28 09:28:00,497 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2023-01-28 09:28:00,497 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 234 transitions, 4307 flow [2023-01-28 09:28:00,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.73333333333332) internal successors, (2531), 15 states have internal predecessors, (2531), 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 09:28:00,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:00,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:00,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-01-28 09:28:00,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 09:28:00,703 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:00,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1858772581, now seen corresponding path program 17 times [2023-01-28 09:28:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:00,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028149972] [2023-01-28 09:28:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:00,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:00,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:00,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028149972] [2023-01-28 09:28:00,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028149972] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:00,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624191373] [2023-01-28 09:28:00,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:28:00,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:00,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:00,789 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:00,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 09:28:00,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:28:00,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:00,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:00,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:00,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:00,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624191373] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:00,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:00,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 09:28:00,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935695113] [2023-01-28 09:28:00,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:00,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:28:00,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:28:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:28:00,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:00,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 4307 flow. Second operand has 15 states, 15 states have (on average 169.06666666666666) internal successors, (2536), 15 states have internal predecessors, (2536), 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 09:28:00,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:00,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:00,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:01,609 INFO L130 PetriNetUnfolder]: 658/1339 cut-off events. [2023-01-28 09:28:01,609 INFO L131 PetriNetUnfolder]: For 29848/29848 co-relation queries the response was YES. [2023-01-28 09:28:01,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11064 conditions, 1339 events. 658/1339 cut-off events. For 29848/29848 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8174 event pairs, 27 based on Foata normal form. 24/1363 useless extension candidates. Maximal degree in co-relation 10994. Up to 595 conditions per place. [2023-01-28 09:28:01,630 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 212 selfloop transitions, 105 changer transitions 7/324 dead transitions. [2023-01-28 09:28:01,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 324 transitions, 6036 flow [2023-01-28 09:28:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 09:28:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 09:28:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3963 transitions. [2023-01-28 09:28:01,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41821443647108486 [2023-01-28 09:28:01,634 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3963 transitions. [2023-01-28 09:28:01,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3963 transitions. [2023-01-28 09:28:01,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:01,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3963 transitions. [2023-01-28 09:28:01,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 172.30434782608697) internal successors, (3963), 23 states have internal predecessors, (3963), 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 09:28:01,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 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 09:28:01,643 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 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 09:28:01,644 INFO L175 Difference]: Start difference. First operand has 205 places, 234 transitions, 4307 flow. Second operand 23 states and 3963 transitions. [2023-01-28 09:28:01,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 324 transitions, 6036 flow [2023-01-28 09:28:01,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 324 transitions, 5854 flow, removed 53 selfloop flow, removed 7 redundant places. [2023-01-28 09:28:01,773 INFO L231 Difference]: Finished difference. Result has 226 places, 251 transitions, 4920 flow [2023-01-28 09:28:01,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=4104, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4920, PETRI_PLACES=226, PETRI_TRANSITIONS=251} [2023-01-28 09:28:01,774 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-01-28 09:28:01,774 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 251 transitions, 4920 flow [2023-01-28 09:28:01,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 169.06666666666666) internal successors, (2536), 15 states have internal predecessors, (2536), 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 09:28:01,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:01,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:01,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:01,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:01,980 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:01,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2139611511, now seen corresponding path program 18 times [2023-01-28 09:28:01,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:01,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686266690] [2023-01-28 09:28:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:01,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:02,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686266690] [2023-01-28 09:28:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686266690] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:02,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715588912] [2023-01-28 09:28:02,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:28:02,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:02,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:02,054 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:02,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 09:28:02,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 09:28:02,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:02,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:02,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:02,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:02,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715588912] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:02,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:02,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 09:28:02,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480848559] [2023-01-28 09:28:02,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:02,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:28:02,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:02,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:28:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:28:02,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:02,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 251 transitions, 4920 flow. Second operand has 15 states, 15 states have (on average 168.73333333333332) internal successors, (2531), 15 states have internal predecessors, (2531), 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 09:28:02,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:02,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:02,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:02,966 INFO L130 PetriNetUnfolder]: 776/1587 cut-off events. [2023-01-28 09:28:02,967 INFO L131 PetriNetUnfolder]: For 49092/49092 co-relation queries the response was YES. [2023-01-28 09:28:02,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14335 conditions, 1587 events. 776/1587 cut-off events. For 49092/49092 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10130 event pairs, 116 based on Foata normal form. 16/1603 useless extension candidates. Maximal degree in co-relation 14257. Up to 472 conditions per place. [2023-01-28 09:28:02,990 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 227 selfloop transitions, 143 changer transitions 4/374 dead transitions. [2023-01-28 09:28:02,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 374 transitions, 7969 flow [2023-01-28 09:28:02,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 09:28:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 09:28:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3959 transitions. [2023-01-28 09:28:02,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41779231743351625 [2023-01-28 09:28:02,995 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3959 transitions. [2023-01-28 09:28:02,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3959 transitions. [2023-01-28 09:28:02,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:02,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3959 transitions. [2023-01-28 09:28:03,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 172.1304347826087) internal successors, (3959), 23 states have internal predecessors, (3959), 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 09:28:03,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 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 09:28:03,006 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 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 09:28:03,006 INFO L175 Difference]: Start difference. First operand has 226 places, 251 transitions, 4920 flow. Second operand 23 states and 3959 transitions. [2023-01-28 09:28:03,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 374 transitions, 7969 flow [2023-01-28 09:28:03,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 374 transitions, 6986 flow, removed 398 selfloop flow, removed 11 redundant places. [2023-01-28 09:28:03,194 INFO L231 Difference]: Finished difference. Result has 242 places, 305 transitions, 6227 flow [2023-01-28 09:28:03,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=4389, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6227, PETRI_PLACES=242, PETRI_TRANSITIONS=305} [2023-01-28 09:28:03,195 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-01-28 09:28:03,195 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 305 transitions, 6227 flow [2023-01-28 09:28:03,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.73333333333332) internal successors, (2531), 15 states have internal predecessors, (2531), 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 09:28:03,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:03,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:03,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:03,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 09:28:03,399 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:03,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:03,399 INFO L85 PathProgramCache]: Analyzing trace with hash 988708695, now seen corresponding path program 19 times [2023-01-28 09:28:03,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:03,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106049645] [2023-01-28 09:28:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:03,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:03,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106049645] [2023-01-28 09:28:03,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106049645] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:03,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675042376] [2023-01-28 09:28:03,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:28:03,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:03,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:03,487 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:03,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 09:28:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:03,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:03,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:03,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675042376] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:03,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:03,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 09:28:03,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211241662] [2023-01-28 09:28:03,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:03,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:28:03,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:03,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:28:03,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:28:03,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:03,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 305 transitions, 6227 flow. Second operand has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 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 09:28:03,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:03,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:03,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:04,341 INFO L130 PetriNetUnfolder]: 862/1779 cut-off events. [2023-01-28 09:28:04,343 INFO L131 PetriNetUnfolder]: For 62137/62137 co-relation queries the response was YES. [2023-01-28 09:28:04,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15867 conditions, 1779 events. 862/1779 cut-off events. For 62137/62137 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11790 event pairs, 195 based on Foata normal form. 40/1819 useless extension candidates. Maximal degree in co-relation 15783. Up to 1019 conditions per place. [2023-01-28 09:28:04,370 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 263 selfloop transitions, 121 changer transitions 0/384 dead transitions. [2023-01-28 09:28:04,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 384 transitions, 8294 flow [2023-01-28 09:28:04,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 09:28:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 09:28:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2260 transitions. [2023-01-28 09:28:04,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42195668409260645 [2023-01-28 09:28:04,373 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2260 transitions. [2023-01-28 09:28:04,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2260 transitions. [2023-01-28 09:28:04,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:04,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2260 transitions. [2023-01-28 09:28:04,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 173.84615384615384) internal successors, (2260), 13 states have internal predecessors, (2260), 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 09:28:04,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 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 09:28:04,380 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 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 09:28:04,380 INFO L175 Difference]: Start difference. First operand has 242 places, 305 transitions, 6227 flow. Second operand 13 states and 2260 transitions. [2023-01-28 09:28:04,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 384 transitions, 8294 flow [2023-01-28 09:28:04,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 384 transitions, 7514 flow, removed 368 selfloop flow, removed 8 redundant places. [2023-01-28 09:28:04,682 INFO L231 Difference]: Finished difference. Result has 248 places, 321 transitions, 6310 flow [2023-01-28 09:28:04,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6310, PETRI_PLACES=248, PETRI_TRANSITIONS=321} [2023-01-28 09:28:04,682 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 228 predicate places. [2023-01-28 09:28:04,682 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 321 transitions, 6310 flow [2023-01-28 09:28:04,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 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 09:28:04,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:04,683 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:04,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-01-28 09:28:04,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:04,883 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:04,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1226313027, now seen corresponding path program 20 times [2023-01-28 09:28:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:04,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90330240] [2023-01-28 09:28:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:04,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:04,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:04,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90330240] [2023-01-28 09:28:04,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90330240] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:04,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743323656] [2023-01-28 09:28:04,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:28:04,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:04,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:04,954 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:04,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 09:28:05,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:28:05,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:05,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:05,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:05,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:05,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743323656] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:05,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:05,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 09:28:05,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710798763] [2023-01-28 09:28:05,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:05,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:28:05,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:28:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:28:05,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:05,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 321 transitions, 6310 flow. Second operand has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:28:05,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:05,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:05,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:05,843 INFO L130 PetriNetUnfolder]: 928/1905 cut-off events. [2023-01-28 09:28:05,844 INFO L131 PetriNetUnfolder]: For 55076/55076 co-relation queries the response was YES. [2023-01-28 09:28:05,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16385 conditions, 1905 events. 928/1905 cut-off events. For 55076/55076 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12743 event pairs, 156 based on Foata normal form. 6/1911 useless extension candidates. Maximal degree in co-relation 16297. Up to 640 conditions per place. [2023-01-28 09:28:05,869 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 245 selfloop transitions, 144 changer transitions 2/391 dead transitions. [2023-01-28 09:28:05,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 391 transitions, 7993 flow [2023-01-28 09:28:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 09:28:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 09:28:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2926 transitions. [2023-01-28 09:28:05,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41776127926898915 [2023-01-28 09:28:05,873 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2926 transitions. [2023-01-28 09:28:05,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2926 transitions. [2023-01-28 09:28:05,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:05,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2926 transitions. [2023-01-28 09:28:05,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 172.11764705882354) internal successors, (2926), 17 states have internal predecessors, (2926), 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 09:28:05,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 412.0) internal successors, (7416), 18 states have internal predecessors, (7416), 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 09:28:05,881 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 412.0) internal successors, (7416), 18 states have internal predecessors, (7416), 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 09:28:05,881 INFO L175 Difference]: Start difference. First operand has 248 places, 321 transitions, 6310 flow. Second operand 17 states and 2926 transitions. [2023-01-28 09:28:05,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 391 transitions, 7993 flow [2023-01-28 09:28:06,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 391 transitions, 7571 flow, removed 179 selfloop flow, removed 6 redundant places. [2023-01-28 09:28:06,109 INFO L231 Difference]: Finished difference. Result has 263 places, 341 transitions, 6828 flow [2023-01-28 09:28:06,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=5926, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6828, PETRI_PLACES=263, PETRI_TRANSITIONS=341} [2023-01-28 09:28:06,111 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 243 predicate places. [2023-01-28 09:28:06,112 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 341 transitions, 6828 flow [2023-01-28 09:28:06,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:28:06,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:06,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:06,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:06,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-01-28 09:28:06,318 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:06,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash -915768439, now seen corresponding path program 21 times [2023-01-28 09:28:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:06,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477369031] [2023-01-28 09:28:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:06,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:06,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:06,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477369031] [2023-01-28 09:28:06,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477369031] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:06,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099175030] [2023-01-28 09:28:06,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:28:06,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:06,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:06,385 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:06,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 09:28:06,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 09:28:06,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:06,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:06,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:06,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:06,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099175030] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:06,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:06,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 09:28:06,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879849216] [2023-01-28 09:28:06,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:06,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 09:28:06,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:06,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 09:28:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 09:28:06,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:06,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 341 transitions, 6828 flow. Second operand has 11 states, 11 states have (on average 169.0909090909091) internal successors, (1860), 11 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 09:28:06,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:06,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:06,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:07,155 INFO L130 PetriNetUnfolder]: 927/1906 cut-off events. [2023-01-28 09:28:07,155 INFO L131 PetriNetUnfolder]: For 54564/54564 co-relation queries the response was YES. [2023-01-28 09:28:07,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16583 conditions, 1906 events. 927/1906 cut-off events. For 54564/54564 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12775 event pairs, 173 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 16491. Up to 1010 conditions per place. [2023-01-28 09:28:07,182 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 234 selfloop transitions, 132 changer transitions 5/371 dead transitions. [2023-01-28 09:28:07,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 371 transitions, 7954 flow [2023-01-28 09:28:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 09:28:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 09:28:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1890 transitions. [2023-01-28 09:28:07,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170344218887908 [2023-01-28 09:28:07,185 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1890 transitions. [2023-01-28 09:28:07,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1890 transitions. [2023-01-28 09:28:07,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:07,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1890 transitions. [2023-01-28 09:28:07,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 171.8181818181818) internal successors, (1890), 11 states have internal predecessors, (1890), 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 09:28:07,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:28:07,191 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:28:07,191 INFO L175 Difference]: Start difference. First operand has 263 places, 341 transitions, 6828 flow. Second operand 11 states and 1890 transitions. [2023-01-28 09:28:07,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 371 transitions, 7954 flow [2023-01-28 09:28:07,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 371 transitions, 7896 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-01-28 09:28:07,550 INFO L231 Difference]: Finished difference. Result has 268 places, 341 transitions, 7082 flow [2023-01-28 09:28:07,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=6770, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7082, PETRI_PLACES=268, PETRI_TRANSITIONS=341} [2023-01-28 09:28:07,550 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2023-01-28 09:28:07,550 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 341 transitions, 7082 flow [2023-01-28 09:28:07,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.0909090909091) internal successors, (1860), 11 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 09:28:07,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:07,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:07,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:07,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:07,752 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:07,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash 222682459, now seen corresponding path program 22 times [2023-01-28 09:28:07,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:07,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186503029] [2023-01-28 09:28:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:07,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:07,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:07,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186503029] [2023-01-28 09:28:07,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186503029] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:07,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233174352] [2023-01-28 09:28:07,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:28:07,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:07,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:07,835 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:07,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 09:28:07,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:28:07,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:07,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:07,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233174352] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:07,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:07,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 09:28:07,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147649469] [2023-01-28 09:28:07,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:07,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 09:28:07,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:07,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 09:28:07,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-28 09:28:07,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:07,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 341 transitions, 7082 flow. Second operand has 11 states, 11 states have (on average 169.0909090909091) internal successors, (1860), 11 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 09:28:07,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:07,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:07,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:08,552 INFO L130 PetriNetUnfolder]: 943/1930 cut-off events. [2023-01-28 09:28:08,552 INFO L131 PetriNetUnfolder]: For 57665/57665 co-relation queries the response was YES. [2023-01-28 09:28:08,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17176 conditions, 1930 events. 943/1930 cut-off events. For 57665/57665 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12878 event pairs, 58 based on Foata normal form. 10/1940 useless extension candidates. Maximal degree in co-relation 17081. Up to 1497 conditions per place. [2023-01-28 09:28:08,570 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 285 selfloop transitions, 88 changer transitions 0/373 dead transitions. [2023-01-28 09:28:08,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 373 transitions, 8278 flow [2023-01-28 09:28:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 09:28:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 09:28:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1216 transitions. [2023-01-28 09:28:08,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42163661581137307 [2023-01-28 09:28:08,572 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1216 transitions. [2023-01-28 09:28:08,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1216 transitions. [2023-01-28 09:28:08,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:08,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1216 transitions. [2023-01-28 09:28:08,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.71428571428572) internal successors, (1216), 7 states have internal predecessors, (1216), 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 09:28:08,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:28:08,576 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 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 09:28:08,576 INFO L175 Difference]: Start difference. First operand has 268 places, 341 transitions, 7082 flow. Second operand 7 states and 1216 transitions. [2023-01-28 09:28:08,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 373 transitions, 8278 flow [2023-01-28 09:28:08,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 373 transitions, 8215 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-01-28 09:28:08,878 INFO L231 Difference]: Finished difference. Result has 270 places, 348 transitions, 7341 flow [2023-01-28 09:28:08,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7019, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7341, PETRI_PLACES=270, PETRI_TRANSITIONS=348} [2023-01-28 09:28:08,879 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-01-28 09:28:08,879 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 348 transitions, 7341 flow [2023-01-28 09:28:08,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.0909090909091) internal successors, (1860), 11 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 09:28:08,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:08,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:08,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-28 09:28:09,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:09,081 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:09,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:09,081 INFO L85 PathProgramCache]: Analyzing trace with hash -127101819, now seen corresponding path program 23 times [2023-01-28 09:28:09,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:09,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532605910] [2023-01-28 09:28:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:09,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:09,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532605910] [2023-01-28 09:28:09,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532605910] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:09,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6219993] [2023-01-28 09:28:09,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:28:09,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:09,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:09,145 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:09,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 09:28:09,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:28:09,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:09,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:09,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:09,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6219993] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:09,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:09,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 09:28:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556537978] [2023-01-28 09:28:09,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:09,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:28:09,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:28:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:28:09,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:09,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 348 transitions, 7341 flow. Second operand has 13 states, 13 states have (on average 169.07692307692307) internal successors, (2198), 13 states have internal predecessors, (2198), 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 09:28:09,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:09,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:09,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:10,027 INFO L130 PetriNetUnfolder]: 978/2007 cut-off events. [2023-01-28 09:28:10,027 INFO L131 PetriNetUnfolder]: For 61128/61128 co-relation queries the response was YES. [2023-01-28 09:28:10,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18001 conditions, 2007 events. 978/2007 cut-off events. For 61128/61128 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13589 event pairs, 34 based on Foata normal form. 16/2023 useless extension candidates. Maximal degree in co-relation 17905. Up to 945 conditions per place. [2023-01-28 09:28:10,046 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 289 selfloop transitions, 144 changer transitions 1/434 dead transitions. [2023-01-28 09:28:10,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 434 transitions, 9253 flow [2023-01-28 09:28:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 09:28:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 09:28:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3785 transitions. [2023-01-28 09:28:10,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175860547219771 [2023-01-28 09:28:10,051 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3785 transitions. [2023-01-28 09:28:10,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3785 transitions. [2023-01-28 09:28:10,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:10,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3785 transitions. [2023-01-28 09:28:10,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 172.04545454545453) internal successors, (3785), 22 states have internal predecessors, (3785), 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 09:28:10,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 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 09:28:10,061 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 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 09:28:10,061 INFO L175 Difference]: Start difference. First operand has 270 places, 348 transitions, 7341 flow. Second operand 22 states and 3785 transitions. [2023-01-28 09:28:10,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 434 transitions, 9253 flow [2023-01-28 09:28:10,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 434 transitions, 9061 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-01-28 09:28:10,419 INFO L231 Difference]: Finished difference. Result has 296 places, 372 transitions, 8028 flow [2023-01-28 09:28:10,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8028, PETRI_PLACES=296, PETRI_TRANSITIONS=372} [2023-01-28 09:28:10,419 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-01-28 09:28:10,419 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 372 transitions, 8028 flow [2023-01-28 09:28:10,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.07692307692307) internal successors, (2198), 13 states have internal predecessors, (2198), 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 09:28:10,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:10,420 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:10,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-01-28 09:28:10,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:10,626 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:10,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:10,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1017412653, now seen corresponding path program 24 times [2023-01-28 09:28:10,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:10,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284161327] [2023-01-28 09:28:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:10,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:10,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284161327] [2023-01-28 09:28:10,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284161327] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:10,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620810347] [2023-01-28 09:28:10,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:28:10,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:10,701 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:10,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 09:28:10,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 09:28:10,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:10,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:10,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:10,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:28:10,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620810347] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:10,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:10,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 09:28:10,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64124736] [2023-01-28 09:28:10,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:10,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:28:10,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:28:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:28:10,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:10,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 372 transitions, 8028 flow. Second operand has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:28:10,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:10,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:10,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:11,498 INFO L130 PetriNetUnfolder]: 981/2002 cut-off events. [2023-01-28 09:28:11,498 INFO L131 PetriNetUnfolder]: For 66776/66776 co-relation queries the response was YES. [2023-01-28 09:28:11,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18753 conditions, 2002 events. 981/2002 cut-off events. For 66776/66776 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 13431 event pairs, 80 based on Foata normal form. 22/2024 useless extension candidates. Maximal degree in co-relation 18649. Up to 1634 conditions per place. [2023-01-28 09:28:11,515 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 333 selfloop transitions, 82 changer transitions 0/415 dead transitions. [2023-01-28 09:28:11,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 415 transitions, 9353 flow [2023-01-28 09:28:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 09:28:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 09:28:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2588 transitions. [2023-01-28 09:28:11,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41877022653721685 [2023-01-28 09:28:11,520 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2588 transitions. [2023-01-28 09:28:11,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2588 transitions. [2023-01-28 09:28:11,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:11,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2588 transitions. [2023-01-28 09:28:11,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 172.53333333333333) internal successors, (2588), 15 states have internal predecessors, (2588), 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 09:28:11,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 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 09:28:11,530 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 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 09:28:11,530 INFO L175 Difference]: Start difference. First operand has 296 places, 372 transitions, 8028 flow. Second operand 15 states and 2588 transitions. [2023-01-28 09:28:11,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 415 transitions, 9353 flow [2023-01-28 09:28:11,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 415 transitions, 9204 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-01-28 09:28:11,882 INFO L231 Difference]: Finished difference. Result has 305 places, 378 transitions, 8217 flow [2023-01-28 09:28:11,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7695, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8217, PETRI_PLACES=305, PETRI_TRANSITIONS=378} [2023-01-28 09:28:11,882 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 285 predicate places. [2023-01-28 09:28:11,882 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 378 transitions, 8217 flow [2023-01-28 09:28:11,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:28:11,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:11,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:11,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:12,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-01-28 09:28:12,083 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:12,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:12,084 INFO L85 PathProgramCache]: Analyzing trace with hash -591752163, now seen corresponding path program 25 times [2023-01-28 09:28:12,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:12,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035303512] [2023-01-28 09:28:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:12,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:12,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:12,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035303512] [2023-01-28 09:28:12,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035303512] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:12,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886891194] [2023-01-28 09:28:12,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:28:12,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:12,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:12,146 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:12,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 09:28:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:12,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:12,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:12,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:12,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886891194] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:12,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:12,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 09:28:12,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513726452] [2023-01-28 09:28:12,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:12,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:28:12,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:28:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:28:12,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:12,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 378 transitions, 8217 flow. Second operand has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:28:12,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:12,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:12,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:13,109 INFO L130 PetriNetUnfolder]: 1097/2244 cut-off events. [2023-01-28 09:28:13,110 INFO L131 PetriNetUnfolder]: For 81764/81764 co-relation queries the response was YES. [2023-01-28 09:28:13,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21637 conditions, 2244 events. 1097/2244 cut-off events. For 81764/81764 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 15527 event pairs, 74 based on Foata normal form. 16/2260 useless extension candidates. Maximal degree in co-relation 21529. Up to 1322 conditions per place. [2023-01-28 09:28:13,136 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 331 selfloop transitions, 148 changer transitions 0/479 dead transitions. [2023-01-28 09:28:13,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 479 transitions, 11097 flow [2023-01-28 09:28:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 09:28:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 09:28:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2599 transitions. [2023-01-28 09:28:13,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4205501618122977 [2023-01-28 09:28:13,140 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2599 transitions. [2023-01-28 09:28:13,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2599 transitions. [2023-01-28 09:28:13,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:13,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2599 transitions. [2023-01-28 09:28:13,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 173.26666666666668) internal successors, (2599), 15 states have internal predecessors, (2599), 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 09:28:13,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 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 09:28:13,149 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 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 09:28:13,149 INFO L175 Difference]: Start difference. First operand has 305 places, 378 transitions, 8217 flow. Second operand 15 states and 2599 transitions. [2023-01-28 09:28:13,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 479 transitions, 11097 flow [2023-01-28 09:28:13,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 479 transitions, 10869 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-01-28 09:28:13,721 INFO L231 Difference]: Finished difference. Result has 315 places, 411 transitions, 9359 flow [2023-01-28 09:28:13,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=8011, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9359, PETRI_PLACES=315, PETRI_TRANSITIONS=411} [2023-01-28 09:28:13,722 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 295 predicate places. [2023-01-28 09:28:13,722 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 411 transitions, 9359 flow [2023-01-28 09:28:13,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:28:13,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:13,722 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:13,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:13,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-28 09:28:13,928 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:13,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:13,929 INFO L85 PathProgramCache]: Analyzing trace with hash 179362069, now seen corresponding path program 26 times [2023-01-28 09:28:13,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:13,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893943877] [2023-01-28 09:28:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:13,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:14,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:14,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893943877] [2023-01-28 09:28:14,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893943877] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:14,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453764344] [2023-01-28 09:28:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:28:14,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:14,093 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:14,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 09:28:14,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:28:14,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:14,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:14,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:14,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453764344] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:14,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:14,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-28 09:28:14,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467737807] [2023-01-28 09:28:14,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:14,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:28:14,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:14,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:28:14,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:28:14,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:14,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 411 transitions, 9359 flow. Second operand has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 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 09:28:14,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:14,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:14,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:15,296 INFO L130 PetriNetUnfolder]: 1134/2297 cut-off events. [2023-01-28 09:28:15,296 INFO L131 PetriNetUnfolder]: For 85699/85699 co-relation queries the response was YES. [2023-01-28 09:28:15,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22998 conditions, 2297 events. 1134/2297 cut-off events. For 85699/85699 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15770 event pairs, 96 based on Foata normal form. 12/2309 useless extension candidates. Maximal degree in co-relation 22887. Up to 2035 conditions per place. [2023-01-28 09:28:15,317 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 375 selfloop transitions, 76 changer transitions 0/451 dead transitions. [2023-01-28 09:28:15,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 451 transitions, 11023 flow [2023-01-28 09:28:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 09:28:15,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 09:28:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1895 transitions. [2023-01-28 09:28:15,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181376875551633 [2023-01-28 09:28:15,319 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1895 transitions. [2023-01-28 09:28:15,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1895 transitions. [2023-01-28 09:28:15,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:15,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1895 transitions. [2023-01-28 09:28:15,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 172.27272727272728) internal successors, (1895), 11 states have internal predecessors, (1895), 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 09:28:15,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:28:15,323 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:28:15,323 INFO L175 Difference]: Start difference. First operand has 315 places, 411 transitions, 9359 flow. Second operand 11 states and 1895 transitions. [2023-01-28 09:28:15,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 451 transitions, 11023 flow [2023-01-28 09:28:15,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 451 transitions, 10660 flow, removed 114 selfloop flow, removed 13 redundant places. [2023-01-28 09:28:15,751 INFO L231 Difference]: Finished difference. Result has 312 places, 428 transitions, 9632 flow [2023-01-28 09:28:15,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=8925, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9632, PETRI_PLACES=312, PETRI_TRANSITIONS=428} [2023-01-28 09:28:15,752 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-01-28 09:28:15,752 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 428 transitions, 9632 flow [2023-01-28 09:28:15,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 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 09:28:15,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:15,752 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:15,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-01-28 09:28:15,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:15,953 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:15,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1678716689, now seen corresponding path program 27 times [2023-01-28 09:28:15,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:15,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258250275] [2023-01-28 09:28:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:15,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:16,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:16,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258250275] [2023-01-28 09:28:16,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258250275] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:16,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449005402] [2023-01-28 09:28:16,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:28:16,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:16,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:16,045 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:16,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 09:28:16,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:28:16,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:16,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:16,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:16,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449005402] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:16,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:16,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 09:28:16,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115277635] [2023-01-28 09:28:16,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:16,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:28:16,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:28:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:28:16,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:16,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 428 transitions, 9632 flow. Second operand has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 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 09:28:16,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:16,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:16,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:17,085 INFO L130 PetriNetUnfolder]: 1192/2425 cut-off events. [2023-01-28 09:28:17,086 INFO L131 PetriNetUnfolder]: For 90262/90262 co-relation queries the response was YES. [2023-01-28 09:28:17,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24067 conditions, 2425 events. 1192/2425 cut-off events. For 90262/90262 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 16940 event pairs, 94 based on Foata normal form. 12/2437 useless extension candidates. Maximal degree in co-relation 23957. Up to 1795 conditions per place. [2023-01-28 09:28:17,118 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 358 selfloop transitions, 135 changer transitions 0/493 dead transitions. [2023-01-28 09:28:17,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 493 transitions, 11552 flow [2023-01-28 09:28:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 09:28:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 09:28:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2422 transitions. [2023-01-28 09:28:17,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199029126213592 [2023-01-28 09:28:17,125 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2422 transitions. [2023-01-28 09:28:17,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2422 transitions. [2023-01-28 09:28:17,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:17,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2422 transitions. [2023-01-28 09:28:17,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.0) internal successors, (2422), 14 states have internal predecessors, (2422), 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 09:28:17,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 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 09:28:17,136 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 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 09:28:17,136 INFO L175 Difference]: Start difference. First operand has 312 places, 428 transitions, 9632 flow. Second operand 14 states and 2422 transitions. [2023-01-28 09:28:17,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 493 transitions, 11552 flow [2023-01-28 09:28:17,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 493 transitions, 11350 flow, removed 46 selfloop flow, removed 6 redundant places. [2023-01-28 09:28:17,717 INFO L231 Difference]: Finished difference. Result has 321 places, 444 transitions, 10178 flow [2023-01-28 09:28:17,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=9370, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10178, PETRI_PLACES=321, PETRI_TRANSITIONS=444} [2023-01-28 09:28:17,718 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 301 predicate places. [2023-01-28 09:28:17,718 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 444 transitions, 10178 flow [2023-01-28 09:28:17,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 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 09:28:17,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:17,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:17,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:17,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 09:28:17,920 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:17,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:17,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1591495955, now seen corresponding path program 28 times [2023-01-28 09:28:17,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:17,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222524081] [2023-01-28 09:28:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:17,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:17,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:17,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222524081] [2023-01-28 09:28:17,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222524081] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:17,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566936277] [2023-01-28 09:28:17,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:28:17,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:17,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:17,980 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:17,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 09:28:18,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:28:18,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:18,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:18,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:18,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566936277] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:18,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:18,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 09:28:18,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514536859] [2023-01-28 09:28:18,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:18,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:28:18,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:18,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:28:18,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:28:18,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:18,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 444 transitions, 10178 flow. Second operand has 12 states, 12 states have (on average 169.16666666666666) internal successors, (2030), 12 states have internal predecessors, (2030), 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 09:28:18,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:18,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:18,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:19,121 INFO L130 PetriNetUnfolder]: 1174/2377 cut-off events. [2023-01-28 09:28:19,121 INFO L131 PetriNetUnfolder]: For 90642/90642 co-relation queries the response was YES. [2023-01-28 09:28:19,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24034 conditions, 2377 events. 1174/2377 cut-off events. For 90642/90642 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16482 event pairs, 40 based on Foata normal form. 12/2389 useless extension candidates. Maximal degree in co-relation 23923. Up to 1021 conditions per place. [2023-01-28 09:28:19,143 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 295 selfloop transitions, 196 changer transitions 4/495 dead transitions. [2023-01-28 09:28:19,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 495 transitions, 11925 flow [2023-01-28 09:28:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 09:28:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 09:28:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3259 transitions. [2023-01-28 09:28:19,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41632600919775165 [2023-01-28 09:28:19,146 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3259 transitions. [2023-01-28 09:28:19,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3259 transitions. [2023-01-28 09:28:19,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:19,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3259 transitions. [2023-01-28 09:28:19,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 171.52631578947367) internal successors, (3259), 19 states have internal predecessors, (3259), 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 09:28:19,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 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 09:28:19,153 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 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 09:28:19,153 INFO L175 Difference]: Start difference. First operand has 321 places, 444 transitions, 10178 flow. Second operand 19 states and 3259 transitions. [2023-01-28 09:28:19,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 495 transitions, 11925 flow [2023-01-28 09:28:19,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 495 transitions, 11751 flow, removed 20 selfloop flow, removed 9 redundant places. [2023-01-28 09:28:19,784 INFO L231 Difference]: Finished difference. Result has 330 places, 444 transitions, 10466 flow [2023-01-28 09:28:19,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=9899, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10466, PETRI_PLACES=330, PETRI_TRANSITIONS=444} [2023-01-28 09:28:19,785 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 310 predicate places. [2023-01-28 09:28:19,785 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 444 transitions, 10466 flow [2023-01-28 09:28:19,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.16666666666666) internal successors, (2030), 12 states have internal predecessors, (2030), 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 09:28:19,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:19,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:19,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-01-28 09:28:19,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 09:28:19,989 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:19,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:19,989 INFO L85 PathProgramCache]: Analyzing trace with hash 139348501, now seen corresponding path program 29 times [2023-01-28 09:28:19,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:19,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080598908] [2023-01-28 09:28:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:19,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:20,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:20,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080598908] [2023-01-28 09:28:20,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080598908] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:20,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729790485] [2023-01-28 09:28:20,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:28:20,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:20,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:20,068 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:20,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 09:28:20,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:28:20,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:20,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:20,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:20,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:20,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729790485] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:20,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:20,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 09:28:20,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194988933] [2023-01-28 09:28:20,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:20,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:28:20,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:20,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:28:20,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:28:20,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:20,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 444 transitions, 10466 flow. Second operand has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 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 09:28:20,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:20,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:20,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:21,065 INFO L130 PetriNetUnfolder]: 1165/2364 cut-off events. [2023-01-28 09:28:21,065 INFO L131 PetriNetUnfolder]: For 93176/93176 co-relation queries the response was YES. [2023-01-28 09:28:21,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24601 conditions, 2364 events. 1165/2364 cut-off events. For 93176/93176 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16451 event pairs, 168 based on Foata normal form. 8/2372 useless extension candidates. Maximal degree in co-relation 24489. Up to 704 conditions per place. [2023-01-28 09:28:21,092 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 309 selfloop transitions, 198 changer transitions 2/509 dead transitions. [2023-01-28 09:28:21,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 509 transitions, 12497 flow [2023-01-28 09:28:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 09:28:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 09:28:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3099 transitions. [2023-01-28 09:28:21,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178802588996764 [2023-01-28 09:28:21,095 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3099 transitions. [2023-01-28 09:28:21,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3099 transitions. [2023-01-28 09:28:21,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:21,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3099 transitions. [2023-01-28 09:28:21,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 172.16666666666666) internal successors, (3099), 18 states have internal predecessors, (3099), 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 09:28:21,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 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 09:28:21,103 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 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 09:28:21,103 INFO L175 Difference]: Start difference. First operand has 330 places, 444 transitions, 10466 flow. Second operand 18 states and 3099 transitions. [2023-01-28 09:28:21,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 509 transitions, 12497 flow [2023-01-28 09:28:21,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 509 transitions, 12320 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-01-28 09:28:21,746 INFO L231 Difference]: Finished difference. Result has 334 places, 449 transitions, 10940 flow [2023-01-28 09:28:21,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10168, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10940, PETRI_PLACES=334, PETRI_TRANSITIONS=449} [2023-01-28 09:28:21,747 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 314 predicate places. [2023-01-28 09:28:21,747 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 449 transitions, 10940 flow [2023-01-28 09:28:21,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 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 09:28:21,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:21,748 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:21,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-01-28 09:28:21,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 09:28:21,953 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:21,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:21,954 INFO L85 PathProgramCache]: Analyzing trace with hash -421013737, now seen corresponding path program 30 times [2023-01-28 09:28:21,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:21,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100747101] [2023-01-28 09:28:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:21,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:22,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:22,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100747101] [2023-01-28 09:28:22,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100747101] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:22,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018703695] [2023-01-28 09:28:22,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:28:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:22,051 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:22,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 09:28:22,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 09:28:22,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:22,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:22,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:22,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:22,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018703695] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:22,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:22,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-28 09:28:22,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949734702] [2023-01-28 09:28:22,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:22,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:28:22,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:28:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:28:22,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:28:22,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 449 transitions, 10940 flow. Second operand has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:28:22,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:22,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:28:22,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:23,061 INFO L130 PetriNetUnfolder]: 1160/2349 cut-off events. [2023-01-28 09:28:23,061 INFO L131 PetriNetUnfolder]: For 95384/95384 co-relation queries the response was YES. [2023-01-28 09:28:23,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25048 conditions, 2349 events. 1160/2349 cut-off events. For 95384/95384 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16327 event pairs, 214 based on Foata normal form. 2/2351 useless extension candidates. Maximal degree in co-relation 24935. Up to 900 conditions per place. [2023-01-28 09:28:23,086 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 320 selfloop transitions, 163 changer transitions 4/487 dead transitions. [2023-01-28 09:28:23,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 487 transitions, 12329 flow [2023-01-28 09:28:23,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 09:28:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 09:28:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2745 transitions. [2023-01-28 09:28:23,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164138349514563 [2023-01-28 09:28:23,089 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2745 transitions. [2023-01-28 09:28:23,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2745 transitions. [2023-01-28 09:28:23,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:23,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2745 transitions. [2023-01-28 09:28:23,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 171.5625) internal successors, (2745), 16 states have internal predecessors, (2745), 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 09:28:23,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 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 09:28:23,096 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 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 09:28:23,096 INFO L175 Difference]: Start difference. First operand has 334 places, 449 transitions, 10940 flow. Second operand 16 states and 2745 transitions. [2023-01-28 09:28:23,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 487 transitions, 12329 flow [2023-01-28 09:28:23,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 487 transitions, 11966 flow, removed 77 selfloop flow, removed 10 redundant places. [2023-01-28 09:28:23,729 INFO L231 Difference]: Finished difference. Result has 336 places, 445 transitions, 10801 flow [2023-01-28 09:28:23,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10516, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10801, PETRI_PLACES=336, PETRI_TRANSITIONS=445} [2023-01-28 09:28:23,730 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 316 predicate places. [2023-01-28 09:28:23,730 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 445 transitions, 10801 flow [2023-01-28 09:28:23,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 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 09:28:23,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:23,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:23,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-01-28 09:28:23,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:23,931 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:23,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1081948156, now seen corresponding path program 31 times [2023-01-28 09:28:23,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:23,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348098244] [2023-01-28 09:28:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:23,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:24,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:24,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348098244] [2023-01-28 09:28:24,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348098244] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:24,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69319963] [2023-01-28 09:28:24,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:28:24,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:24,569 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:24,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-28 09:28:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:24,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:24,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:25,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69319963] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:25,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:25,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 09:28:25,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435600584] [2023-01-28 09:28:25,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:25,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:28:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:28:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:28:25,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:28:25,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 445 transitions, 10801 flow. Second operand has 20 states, 20 states have (on average 157.0) internal successors, (3140), 20 states have internal predecessors, (3140), 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 09:28:25,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:25,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:28:25,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:26,173 INFO L130 PetriNetUnfolder]: 1351/2773 cut-off events. [2023-01-28 09:28:26,173 INFO L131 PetriNetUnfolder]: For 111219/111221 co-relation queries the response was YES. [2023-01-28 09:28:26,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29422 conditions, 2773 events. 1351/2773 cut-off events. For 111219/111221 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 20272 event pairs, 91 based on Foata normal form. 5/2773 useless extension candidates. Maximal degree in co-relation 29309. Up to 2167 conditions per place. [2023-01-28 09:28:26,207 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 455 selfloop transitions, 105 changer transitions 15/585 dead transitions. [2023-01-28 09:28:26,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 585 transitions, 14581 flow [2023-01-28 09:28:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 09:28:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 09:28:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1785 transitions. [2023-01-28 09:28:26,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3938658428949691 [2023-01-28 09:28:26,209 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1785 transitions. [2023-01-28 09:28:26,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1785 transitions. [2023-01-28 09:28:26,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:26,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1785 transitions. [2023-01-28 09:28:26,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 162.27272727272728) internal successors, (1785), 11 states have internal predecessors, (1785), 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 09:28:26,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:28:26,214 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:28:26,214 INFO L175 Difference]: Start difference. First operand has 336 places, 445 transitions, 10801 flow. Second operand 11 states and 1785 transitions. [2023-01-28 09:28:26,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 585 transitions, 14581 flow [2023-01-28 09:28:26,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 585 transitions, 14247 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-01-28 09:28:26,864 INFO L231 Difference]: Finished difference. Result has 338 places, 507 transitions, 12541 flow [2023-01-28 09:28:26,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10548, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12541, PETRI_PLACES=338, PETRI_TRANSITIONS=507} [2023-01-28 09:28:26,864 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-01-28 09:28:26,865 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 507 transitions, 12541 flow [2023-01-28 09:28:26,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 157.0) internal successors, (3140), 20 states have internal predecessors, (3140), 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 09:28:26,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:26,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:26,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:27,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:27,071 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:27,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1129985218, now seen corresponding path program 32 times [2023-01-28 09:28:27,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:27,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976585842] [2023-01-28 09:28:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:27,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:27,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:27,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976585842] [2023-01-28 09:28:27,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976585842] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:27,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634020726] [2023-01-28 09:28:27,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:28:27,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:27,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:27,449 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:27,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 09:28:27,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:28:27,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:27,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:27,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:27,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:27,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634020726] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:27,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:27,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-28 09:28:27,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617469365] [2023-01-28 09:28:27,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:27,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:28:27,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:27,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:28:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:28:27,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:28:27,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 507 transitions, 12541 flow. Second operand has 15 states, 15 states have (on average 157.2) internal successors, (2358), 15 states have internal predecessors, (2358), 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 09:28:27,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:27,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:28:27,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:29,024 INFO L130 PetriNetUnfolder]: 1355/2761 cut-off events. [2023-01-28 09:28:29,024 INFO L131 PetriNetUnfolder]: For 115617/115619 co-relation queries the response was YES. [2023-01-28 09:28:29,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30483 conditions, 2761 events. 1355/2761 cut-off events. For 115617/115619 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 19967 event pairs, 103 based on Foata normal form. 7/2763 useless extension candidates. Maximal degree in co-relation 30361. Up to 2380 conditions per place. [2023-01-28 09:28:29,060 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 456 selfloop transitions, 79 changer transitions 17/562 dead transitions. [2023-01-28 09:28:29,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 562 transitions, 14236 flow [2023-01-28 09:28:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 09:28:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 09:28:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1932 transitions. [2023-01-28 09:28:29,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907766990291262 [2023-01-28 09:28:29,066 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1932 transitions. [2023-01-28 09:28:29,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1932 transitions. [2023-01-28 09:28:29,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:29,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1932 transitions. [2023-01-28 09:28:29,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 161.0) internal successors, (1932), 12 states have internal predecessors, (1932), 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 09:28:29,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 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 09:28:29,072 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 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 09:28:29,072 INFO L175 Difference]: Start difference. First operand has 338 places, 507 transitions, 12541 flow. Second operand 12 states and 1932 transitions. [2023-01-28 09:28:29,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 562 transitions, 14236 flow [2023-01-28 09:28:29,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 562 transitions, 13816 flow, removed 205 selfloop flow, removed 4 redundant places. [2023-01-28 09:28:29,994 INFO L231 Difference]: Finished difference. Result has 348 places, 513 transitions, 12589 flow [2023-01-28 09:28:29,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12177, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12589, PETRI_PLACES=348, PETRI_TRANSITIONS=513} [2023-01-28 09:28:29,996 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2023-01-28 09:28:29,996 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 513 transitions, 12589 flow [2023-01-28 09:28:29,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.2) internal successors, (2358), 15 states have internal predecessors, (2358), 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 09:28:29,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:29,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:30,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:30,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-01-28 09:28:30,202 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:30,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1044264796, now seen corresponding path program 33 times [2023-01-28 09:28:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:30,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966741322] [2023-01-28 09:28:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:30,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:30,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:30,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966741322] [2023-01-28 09:28:30,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966741322] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:30,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881663275] [2023-01-28 09:28:30,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:28:30,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:30,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:30,605 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:30,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 09:28:30,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:28:30,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:30,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:31,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881663275] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:31,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:31,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 09:28:31,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037054850] [2023-01-28 09:28:31,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:31,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:28:31,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:31,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:28:31,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:28:31,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:28:31,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 513 transitions, 12589 flow. Second operand has 20 states, 20 states have (on average 156.9) internal successors, (3138), 20 states have internal predecessors, (3138), 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 09:28:31,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:31,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:28:31,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:32,197 INFO L130 PetriNetUnfolder]: 1324/2676 cut-off events. [2023-01-28 09:28:32,198 INFO L131 PetriNetUnfolder]: For 105638/105640 co-relation queries the response was YES. [2023-01-28 09:28:32,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29112 conditions, 2676 events. 1324/2676 cut-off events. For 105638/105640 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 19077 event pairs, 90 based on Foata normal form. 3/2674 useless extension candidates. Maximal degree in co-relation 28988. Up to 2174 conditions per place. [2023-01-28 09:28:32,236 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 446 selfloop transitions, 102 changer transitions 5/563 dead transitions. [2023-01-28 09:28:32,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 563 transitions, 14228 flow [2023-01-28 09:28:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:28:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:28:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1462 transitions. [2023-01-28 09:28:32,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39428263214670983 [2023-01-28 09:28:32,238 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1462 transitions. [2023-01-28 09:28:32,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1462 transitions. [2023-01-28 09:28:32,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:32,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1462 transitions. [2023-01-28 09:28:32,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.44444444444446) internal successors, (1462), 9 states have internal predecessors, (1462), 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 09:28:32,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:28:32,242 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:28:32,242 INFO L175 Difference]: Start difference. First operand has 348 places, 513 transitions, 12589 flow. Second operand 9 states and 1462 transitions. [2023-01-28 09:28:32,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 563 transitions, 14228 flow [2023-01-28 09:28:33,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 563 transitions, 13823 flow, removed 147 selfloop flow, removed 6 redundant places. [2023-01-28 09:28:33,121 INFO L231 Difference]: Finished difference. Result has 349 places, 515 transitions, 12553 flow [2023-01-28 09:28:33,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12204, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12553, PETRI_PLACES=349, PETRI_TRANSITIONS=515} [2023-01-28 09:28:33,122 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 329 predicate places. [2023-01-28 09:28:33,122 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 515 transitions, 12553 flow [2023-01-28 09:28:33,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 156.9) internal successors, (3138), 20 states have internal predecessors, (3138), 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 09:28:33,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:33,123 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:33,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-28 09:28:33,328 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:33,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash -392624, now seen corresponding path program 34 times [2023-01-28 09:28:33,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:33,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889281257] [2023-01-28 09:28:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:33,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:33,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889281257] [2023-01-28 09:28:33,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889281257] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:33,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181070935] [2023-01-28 09:28:33,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:28:33,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:33,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:33,677 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:33,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 09:28:33,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:28:33,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:33,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:33,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:33,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:34,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181070935] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:34,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:34,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 09:28:34,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878527436] [2023-01-28 09:28:34,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:34,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 09:28:34,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:34,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 09:28:34,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-01-28 09:28:34,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:28:34,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 515 transitions, 12553 flow. Second operand has 18 states, 18 states have (on average 157.0) internal successors, (2826), 18 states have internal predecessors, (2826), 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 09:28:34,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:34,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:28:34,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:35,327 INFO L130 PetriNetUnfolder]: 1315/2649 cut-off events. [2023-01-28 09:28:35,327 INFO L131 PetriNetUnfolder]: For 106535/106537 co-relation queries the response was YES. [2023-01-28 09:28:35,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28554 conditions, 2649 events. 1315/2649 cut-off events. For 106535/106537 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18800 event pairs, 89 based on Foata normal form. 3/2647 useless extension candidates. Maximal degree in co-relation 28430. Up to 2246 conditions per place. [2023-01-28 09:28:35,374 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 454 selfloop transitions, 95 changer transitions 5/564 dead transitions. [2023-01-28 09:28:35,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 564 transitions, 14059 flow [2023-01-28 09:28:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 09:28:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 09:28:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1775 transitions. [2023-01-28 09:28:35,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39165931156222417 [2023-01-28 09:28:35,377 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1775 transitions. [2023-01-28 09:28:35,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1775 transitions. [2023-01-28 09:28:35,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:35,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1775 transitions. [2023-01-28 09:28:35,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 161.36363636363637) internal successors, (1775), 11 states have internal predecessors, (1775), 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 09:28:35,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:28:35,382 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:28:35,382 INFO L175 Difference]: Start difference. First operand has 349 places, 515 transitions, 12553 flow. Second operand 11 states and 1775 transitions. [2023-01-28 09:28:35,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 564 transitions, 14059 flow [2023-01-28 09:28:36,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 564 transitions, 13815 flow, removed 41 selfloop flow, removed 6 redundant places. [2023-01-28 09:28:36,257 INFO L231 Difference]: Finished difference. Result has 354 places, 521 transitions, 12684 flow [2023-01-28 09:28:36,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12315, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12684, PETRI_PLACES=354, PETRI_TRANSITIONS=521} [2023-01-28 09:28:36,258 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 334 predicate places. [2023-01-28 09:28:36,258 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 521 transitions, 12684 flow [2023-01-28 09:28:36,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 157.0) internal successors, (2826), 18 states have internal predecessors, (2826), 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 09:28:36,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:36,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:36,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:36,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-01-28 09:28:36,472 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:36,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2125930154, now seen corresponding path program 35 times [2023-01-28 09:28:36,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:36,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693852421] [2023-01-28 09:28:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:36,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:37,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:37,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693852421] [2023-01-28 09:28:37,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693852421] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:37,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265856831] [2023-01-28 09:28:37,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:28:37,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:37,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:37,173 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:37,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 09:28:37,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:28:37,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:37,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:37,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:37,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:37,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265856831] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:37,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:37,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-01-28 09:28:37,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572111271] [2023-01-28 09:28:37,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:37,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:28:37,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:28:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:28:37,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:28:37,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 521 transitions, 12684 flow. Second operand has 17 states, 17 states have (on average 157.1764705882353) internal successors, (2672), 17 states have internal predecessors, (2672), 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 09:28:37,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:37,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:28:37,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:38,691 INFO L130 PetriNetUnfolder]: 1394/2843 cut-off events. [2023-01-28 09:28:38,692 INFO L131 PetriNetUnfolder]: For 115875/115877 co-relation queries the response was YES. [2023-01-28 09:28:38,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30514 conditions, 2843 events. 1394/2843 cut-off events. For 115875/115877 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 20650 event pairs, 110 based on Foata normal form. 4/2842 useless extension candidates. Maximal degree in co-relation 30389. Up to 2509 conditions per place. [2023-01-28 09:28:38,737 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 488 selfloop transitions, 90 changer transitions 6/594 dead transitions. [2023-01-28 09:28:38,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 594 transitions, 15081 flow [2023-01-28 09:28:38,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 09:28:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 09:28:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1296 transitions. [2023-01-28 09:28:38,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932038834951456 [2023-01-28 09:28:38,739 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1296 transitions. [2023-01-28 09:28:38,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1296 transitions. [2023-01-28 09:28:38,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:38,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1296 transitions. [2023-01-28 09:28:38,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 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 09:28:38,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:28:38,742 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:28:38,742 INFO L175 Difference]: Start difference. First operand has 354 places, 521 transitions, 12684 flow. Second operand 8 states and 1296 transitions. [2023-01-28 09:28:38,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 594 transitions, 15081 flow [2023-01-28 09:28:39,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 594 transitions, 14861 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-01-28 09:28:39,600 INFO L231 Difference]: Finished difference. Result has 355 places, 556 transitions, 13700 flow [2023-01-28 09:28:39,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12470, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13700, PETRI_PLACES=355, PETRI_TRANSITIONS=556} [2023-01-28 09:28:39,601 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 335 predicate places. [2023-01-28 09:28:39,601 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 556 transitions, 13700 flow [2023-01-28 09:28:39,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 157.1764705882353) internal successors, (2672), 17 states have internal predecessors, (2672), 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 09:28:39,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:39,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:39,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:39,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-28 09:28:39,802 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:39,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2021571692, now seen corresponding path program 36 times [2023-01-28 09:28:39,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868303288] [2023-01-28 09:28:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:39,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:40,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:40,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868303288] [2023-01-28 09:28:40,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868303288] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:40,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084507579] [2023-01-28 09:28:40,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:28:40,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:40,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:40,138 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:40,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 09:28:40,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 09:28:40,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:40,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:40,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:40,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:40,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084507579] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:40,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:40,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-01-28 09:28:40,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020617804] [2023-01-28 09:28:40,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:40,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:28:40,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:40,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:28:40,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:28:40,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:28:40,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 556 transitions, 13700 flow. Second operand has 17 states, 17 states have (on average 157.23529411764707) internal successors, (2673), 17 states have internal predecessors, (2673), 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 09:28:40,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:40,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:28:40,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:41,459 INFO L130 PetriNetUnfolder]: 1382/2807 cut-off events. [2023-01-28 09:28:41,459 INFO L131 PetriNetUnfolder]: For 118289/118291 co-relation queries the response was YES. [2023-01-28 09:28:41,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30558 conditions, 2807 events. 1382/2807 cut-off events. For 118289/118291 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 20271 event pairs, 110 based on Foata normal form. 4/2806 useless extension candidates. Maximal degree in co-relation 30431. Up to 2509 conditions per place. [2023-01-28 09:28:41,493 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 489 selfloop transitions, 85 changer transitions 9/593 dead transitions. [2023-01-28 09:28:41,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 593 transitions, 15227 flow [2023-01-28 09:28:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 09:28:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 09:28:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1296 transitions. [2023-01-28 09:28:41,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932038834951456 [2023-01-28 09:28:41,495 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1296 transitions. [2023-01-28 09:28:41,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1296 transitions. [2023-01-28 09:28:41,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:41,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1296 transitions. [2023-01-28 09:28:41,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 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 09:28:41,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:28:41,497 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:28:41,497 INFO L175 Difference]: Start difference. First operand has 355 places, 556 transitions, 13700 flow. Second operand 8 states and 1296 transitions. [2023-01-28 09:28:41,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 593 transitions, 15227 flow [2023-01-28 09:28:42,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 593 transitions, 14866 flow, removed 131 selfloop flow, removed 4 redundant places. [2023-01-28 09:28:42,399 INFO L231 Difference]: Finished difference. Result has 360 places, 556 transitions, 13593 flow [2023-01-28 09:28:42,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13375, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13593, PETRI_PLACES=360, PETRI_TRANSITIONS=556} [2023-01-28 09:28:42,400 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 340 predicate places. [2023-01-28 09:28:42,400 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 556 transitions, 13593 flow [2023-01-28 09:28:42,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 157.23529411764707) internal successors, (2673), 17 states have internal predecessors, (2673), 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 09:28:42,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:42,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:42,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-01-28 09:28:42,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:42,601 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:42,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash -940248734, now seen corresponding path program 37 times [2023-01-28 09:28:42,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:42,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590863296] [2023-01-28 09:28:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:42,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:42,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:42,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590863296] [2023-01-28 09:28:42,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590863296] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:42,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500519031] [2023-01-28 09:28:42,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:28:42,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:42,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:42,949 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:42,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 09:28:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:43,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:43,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:43,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:43,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500519031] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:43,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:43,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-01-28 09:28:43,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117245451] [2023-01-28 09:28:43,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:43,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:28:43,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:43,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:28:43,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:28:43,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:28:43,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 556 transitions, 13593 flow. Second operand has 17 states, 17 states have (on average 157.23529411764707) internal successors, (2673), 17 states have internal predecessors, (2673), 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 09:28:43,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:43,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:28:43,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:44,641 INFO L130 PetriNetUnfolder]: 1376/2773 cut-off events. [2023-01-28 09:28:44,641 INFO L131 PetriNetUnfolder]: For 114040/114042 co-relation queries the response was YES. [2023-01-28 09:28:44,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30062 conditions, 2773 events. 1376/2773 cut-off events. For 114040/114042 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19832 event pairs, 116 based on Foata normal form. 4/2772 useless extension candidates. Maximal degree in co-relation 29933. Up to 2558 conditions per place. [2023-01-28 09:28:44,700 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 504 selfloop transitions, 67 changer transitions 7/588 dead transitions. [2023-01-28 09:28:44,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 588 transitions, 15009 flow [2023-01-28 09:28:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 09:28:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 09:28:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1291 transitions. [2023-01-28 09:28:44,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3916868932038835 [2023-01-28 09:28:44,702 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1291 transitions. [2023-01-28 09:28:44,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1291 transitions. [2023-01-28 09:28:44,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:44,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1291 transitions. [2023-01-28 09:28:44,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 161.375) internal successors, (1291), 8 states have internal predecessors, (1291), 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 09:28:44,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:28:44,705 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:28:44,705 INFO L175 Difference]: Start difference. First operand has 360 places, 556 transitions, 13593 flow. Second operand 8 states and 1291 transitions. [2023-01-28 09:28:44,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 588 transitions, 15009 flow [2023-01-28 09:28:45,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 588 transitions, 14876 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-01-28 09:28:45,980 INFO L231 Difference]: Finished difference. Result has 365 places, 559 transitions, 13732 flow [2023-01-28 09:28:45,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13464, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13732, PETRI_PLACES=365, PETRI_TRANSITIONS=559} [2023-01-28 09:28:45,981 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 345 predicate places. [2023-01-28 09:28:45,982 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 559 transitions, 13732 flow [2023-01-28 09:28:45,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 157.23529411764707) internal successors, (2673), 17 states have internal predecessors, (2673), 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 09:28:45,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:45,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:45,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-01-28 09:28:46,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-28 09:28:46,190 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:46,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1160083242, now seen corresponding path program 38 times [2023-01-28 09:28:46,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:46,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299615125] [2023-01-28 09:28:46,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:46,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:46,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:46,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299615125] [2023-01-28 09:28:46,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299615125] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:46,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331247665] [2023-01-28 09:28:46,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:28:46,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:46,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:46,618 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:46,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 09:28:46,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:28:46,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:46,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:46,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:47,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331247665] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:47,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:47,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-01-28 09:28:47,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171552191] [2023-01-28 09:28:47,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:47,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:28:47,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:28:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:28:47,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 412 [2023-01-28 09:28:47,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 559 transitions, 13732 flow. Second operand has 17 states, 17 states have (on average 152.11764705882354) internal successors, (2586), 17 states have internal predecessors, (2586), 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 09:28:47,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:47,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 412 [2023-01-28 09:28:47,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:48,337 INFO L130 PetriNetUnfolder]: 1481/3017 cut-off events. [2023-01-28 09:28:48,338 INFO L131 PetriNetUnfolder]: For 126145/126147 co-relation queries the response was YES. [2023-01-28 09:28:48,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32741 conditions, 3017 events. 1481/3017 cut-off events. For 126145/126147 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 22201 event pairs, 114 based on Foata normal form. 9/3021 useless extension candidates. Maximal degree in co-relation 32610. Up to 2625 conditions per place. [2023-01-28 09:28:48,377 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 542 selfloop transitions, 98 changer transitions 25/675 dead transitions. [2023-01-28 09:28:48,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 675 transitions, 17044 flow [2023-01-28 09:28:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 09:28:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 09:28:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2028 transitions. [2023-01-28 09:28:48,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3786407766990291 [2023-01-28 09:28:48,379 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2028 transitions. [2023-01-28 09:28:48,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2028 transitions. [2023-01-28 09:28:48,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:48,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2028 transitions. [2023-01-28 09:28:48,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 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 09:28:48,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 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 09:28:48,384 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 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 09:28:48,384 INFO L175 Difference]: Start difference. First operand has 365 places, 559 transitions, 13732 flow. Second operand 13 states and 2028 transitions. [2023-01-28 09:28:48,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 675 transitions, 17044 flow [2023-01-28 09:28:49,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 675 transitions, 16773 flow, removed 62 selfloop flow, removed 6 redundant places. [2023-01-28 09:28:49,578 INFO L231 Difference]: Finished difference. Result has 380 places, 613 transitions, 15208 flow [2023-01-28 09:28:49,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13469, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15208, PETRI_PLACES=380, PETRI_TRANSITIONS=613} [2023-01-28 09:28:49,579 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 360 predicate places. [2023-01-28 09:28:49,579 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 613 transitions, 15208 flow [2023-01-28 09:28:49,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 152.11764705882354) internal successors, (2586), 17 states have internal predecessors, (2586), 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 09:28:49,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:49,580 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:49,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-01-28 09:28:49,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-28 09:28:49,780 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:49,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:49,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1875827202, now seen corresponding path program 39 times [2023-01-28 09:28:49,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:49,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671185408] [2023-01-28 09:28:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:49,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:50,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:50,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671185408] [2023-01-28 09:28:50,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671185408] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:50,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568663108] [2023-01-28 09:28:50,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:28:50,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:50,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:50,177 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:50,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 09:28:50,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:28:50,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:50,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:50,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:50,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:50,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568663108] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:50,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:50,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 09:28:50,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520955587] [2023-01-28 09:28:50,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:50,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:28:50,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:50,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:28:50,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:28:50,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:28:50,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 613 transitions, 15208 flow. Second operand has 20 states, 20 states have (on average 156.9) internal successors, (3138), 20 states have internal predecessors, (3138), 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 09:28:50,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:50,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:28:50,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:51,787 INFO L130 PetriNetUnfolder]: 1572/3187 cut-off events. [2023-01-28 09:28:51,787 INFO L131 PetriNetUnfolder]: For 149767/149769 co-relation queries the response was YES. [2023-01-28 09:28:51,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35630 conditions, 3187 events. 1572/3187 cut-off events. For 149767/149769 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 23588 event pairs, 125 based on Foata normal form. 6/3188 useless extension candidates. Maximal degree in co-relation 35490. Up to 2651 conditions per place. [2023-01-28 09:28:51,829 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 560 selfloop transitions, 118 changer transitions 15/703 dead transitions. [2023-01-28 09:28:51,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 703 transitions, 18266 flow [2023-01-28 09:28:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 09:28:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 09:28:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1777 transitions. [2023-01-28 09:28:51,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39210061782877315 [2023-01-28 09:28:51,831 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1777 transitions. [2023-01-28 09:28:51,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1777 transitions. [2023-01-28 09:28:51,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:51,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1777 transitions. [2023-01-28 09:28:51,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 161.54545454545453) internal successors, (1777), 11 states have internal predecessors, (1777), 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 09:28:51,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:28:51,834 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:28:51,834 INFO L175 Difference]: Start difference. First operand has 380 places, 613 transitions, 15208 flow. Second operand 11 states and 1777 transitions. [2023-01-28 09:28:51,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 703 transitions, 18266 flow [2023-01-28 09:28:53,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 703 transitions, 17761 flow, removed 249 selfloop flow, removed 3 redundant places. [2023-01-28 09:28:53,026 INFO L231 Difference]: Finished difference. Result has 391 places, 645 transitions, 16081 flow [2023-01-28 09:28:53,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=14721, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16081, PETRI_PLACES=391, PETRI_TRANSITIONS=645} [2023-01-28 09:28:53,027 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 371 predicate places. [2023-01-28 09:28:53,027 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 645 transitions, 16081 flow [2023-01-28 09:28:53,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 156.9) internal successors, (3138), 20 states have internal predecessors, (3138), 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 09:28:53,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:53,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:53,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-01-28 09:28:53,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-28 09:28:53,229 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:53,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:53,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1336639400, now seen corresponding path program 40 times [2023-01-28 09:28:53,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:53,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348955651] [2023-01-28 09:28:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:53,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:53,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:53,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348955651] [2023-01-28 09:28:53,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348955651] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:53,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301236634] [2023-01-28 09:28:53,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:28:53,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:53,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:53,572 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:53,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 09:28:53,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:28:53,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:53,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:54,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301236634] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:54,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:54,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-01-28 09:28:54,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839053229] [2023-01-28 09:28:54,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:54,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:28:54,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:28:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:28:54,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:28:54,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 645 transitions, 16081 flow. Second operand has 17 states, 17 states have (on average 157.11764705882354) internal successors, (2671), 17 states have internal predecessors, (2671), 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 09:28:54,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:54,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:28:54,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:55,304 INFO L130 PetriNetUnfolder]: 1610/3255 cut-off events. [2023-01-28 09:28:55,304 INFO L131 PetriNetUnfolder]: For 156258/156260 co-relation queries the response was YES. [2023-01-28 09:28:55,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36511 conditions, 3255 events. 1610/3255 cut-off events. For 156258/156260 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 24094 event pairs, 125 based on Foata normal form. 4/3254 useless extension candidates. Maximal degree in co-relation 36366. Up to 2986 conditions per place. [2023-01-28 09:28:55,348 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 604 selfloop transitions, 76 changer transitions 6/696 dead transitions. [2023-01-28 09:28:55,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 696 transitions, 18224 flow [2023-01-28 09:28:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:28:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:28:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1449 transitions. [2023-01-28 09:28:55,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907766990291262 [2023-01-28 09:28:55,350 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1449 transitions. [2023-01-28 09:28:55,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1449 transitions. [2023-01-28 09:28:55,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:55,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1449 transitions. [2023-01-28 09:28:55,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.0) internal successors, (1449), 9 states have internal predecessors, (1449), 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 09:28:55,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:28:55,353 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:28:55,353 INFO L175 Difference]: Start difference. First operand has 391 places, 645 transitions, 16081 flow. Second operand 9 states and 1449 transitions. [2023-01-28 09:28:55,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 696 transitions, 18224 flow [2023-01-28 09:28:56,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 696 transitions, 17740 flow, removed 197 selfloop flow, removed 6 redundant places. [2023-01-28 09:28:56,491 INFO L231 Difference]: Finished difference. Result has 395 places, 666 transitions, 16436 flow [2023-01-28 09:28:56,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=15609, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16436, PETRI_PLACES=395, PETRI_TRANSITIONS=666} [2023-01-28 09:28:56,492 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2023-01-28 09:28:56,492 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 666 transitions, 16436 flow [2023-01-28 09:28:56,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 157.11764705882354) internal successors, (2671), 17 states have internal predecessors, (2671), 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 09:28:56,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:56,493 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:56,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-01-28 09:28:56,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:56,697 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:56,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:56,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263854, now seen corresponding path program 41 times [2023-01-28 09:28:56,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:56,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342153240] [2023-01-28 09:28:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:56,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:57,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:57,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342153240] [2023-01-28 09:28:57,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342153240] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:57,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830785429] [2023-01-28 09:28:57,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:28:57,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:57,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:57,054 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:57,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 09:28:57,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:28:57,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:57,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:28:57,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:57,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:57,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830785429] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:57,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:57,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-01-28 09:28:57,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56809636] [2023-01-28 09:28:57,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:57,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 09:28:57,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:57,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 09:28:57,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-01-28 09:28:57,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:28:57,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 666 transitions, 16436 flow. Second operand has 19 states, 19 states have (on average 157.10526315789474) internal successors, (2985), 19 states have internal predecessors, (2985), 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 09:28:57,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:57,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:28:57,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:58,922 INFO L130 PetriNetUnfolder]: 1669/3389 cut-off events. [2023-01-28 09:28:58,923 INFO L131 PetriNetUnfolder]: For 146357/146359 co-relation queries the response was YES. [2023-01-28 09:28:58,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37004 conditions, 3389 events. 1669/3389 cut-off events. For 146357/146359 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 25388 event pairs, 128 based on Foata normal form. 5/3389 useless extension candidates. Maximal degree in co-relation 36858. Up to 3011 conditions per place. [2023-01-28 09:28:58,972 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 612 selfloop transitions, 101 changer transitions 7/730 dead transitions. [2023-01-28 09:28:58,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 730 transitions, 18849 flow [2023-01-28 09:28:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 09:28:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 09:28:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1299 transitions. [2023-01-28 09:28:58,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941140776699029 [2023-01-28 09:28:58,974 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1299 transitions. [2023-01-28 09:28:58,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1299 transitions. [2023-01-28 09:28:58,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:58,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1299 transitions. [2023-01-28 09:28:58,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 162.375) internal successors, (1299), 8 states have internal predecessors, (1299), 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 09:28:58,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:28:58,977 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 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 09:28:58,977 INFO L175 Difference]: Start difference. First operand has 395 places, 666 transitions, 16436 flow. Second operand 8 states and 1299 transitions. [2023-01-28 09:28:58,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 730 transitions, 18849 flow [2023-01-28 09:29:00,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 730 transitions, 18501 flow, removed 125 selfloop flow, removed 5 redundant places. [2023-01-28 09:29:00,262 INFO L231 Difference]: Finished difference. Result has 399 places, 692 transitions, 17072 flow [2023-01-28 09:29:00,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16094, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17072, PETRI_PLACES=399, PETRI_TRANSITIONS=692} [2023-01-28 09:29:00,263 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-01-28 09:29:00,263 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 692 transitions, 17072 flow [2023-01-28 09:29:00,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 157.10526315789474) internal successors, (2985), 19 states have internal predecessors, (2985), 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 09:29:00,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:00,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:00,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-01-28 09:29:00,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:00,464 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:00,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1615598274, now seen corresponding path program 42 times [2023-01-28 09:29:00,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:00,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864973287] [2023-01-28 09:29:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:00,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:00,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:00,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864973287] [2023-01-28 09:29:00,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864973287] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:00,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711982629] [2023-01-28 09:29:00,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:29:00,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:00,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:00,773 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:00,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 09:29:00,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 09:29:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:00,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:29:00,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:00,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:01,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711982629] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:01,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:01,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-01-28 09:29:01,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714468553] [2023-01-28 09:29:01,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:01,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 09:29:01,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:01,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 09:29:01,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-01-28 09:29:01,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:29:01,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 692 transitions, 17072 flow. Second operand has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 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 09:29:01,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:01,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:29:01,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:02,476 INFO L130 PetriNetUnfolder]: 1664/3354 cut-off events. [2023-01-28 09:29:02,476 INFO L131 PetriNetUnfolder]: For 147446/147448 co-relation queries the response was YES. [2023-01-28 09:29:02,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36721 conditions, 3354 events. 1664/3354 cut-off events. For 147446/147448 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 24919 event pairs, 125 based on Foata normal form. 5/3354 useless extension candidates. Maximal degree in co-relation 36573. Up to 3011 conditions per place. [2023-01-28 09:29:02,530 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 610 selfloop transitions, 98 changer transitions 8/726 dead transitions. [2023-01-28 09:29:02,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 726 transitions, 18740 flow [2023-01-28 09:29:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:29:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:29:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1454 transitions. [2023-01-28 09:29:02,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39212513484358147 [2023-01-28 09:29:02,531 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1454 transitions. [2023-01-28 09:29:02,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1454 transitions. [2023-01-28 09:29:02,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:02,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1454 transitions. [2023-01-28 09:29:02,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.55555555555554) internal successors, (1454), 9 states have internal predecessors, (1454), 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 09:29:02,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:29:02,535 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:29:02,535 INFO L175 Difference]: Start difference. First operand has 399 places, 692 transitions, 17072 flow. Second operand 9 states and 1454 transitions. [2023-01-28 09:29:02,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 726 transitions, 18740 flow [2023-01-28 09:29:03,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 726 transitions, 18462 flow, removed 67 selfloop flow, removed 5 redundant places. [2023-01-28 09:29:03,952 INFO L231 Difference]: Finished difference. Result has 403 places, 692 transitions, 17068 flow [2023-01-28 09:29:03,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16798, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17068, PETRI_PLACES=403, PETRI_TRANSITIONS=692} [2023-01-28 09:29:03,953 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-01-28 09:29:03,953 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 692 transitions, 17068 flow [2023-01-28 09:29:03,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 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 09:29:03,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:03,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:03,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:04,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:04,154 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:04,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -210237672, now seen corresponding path program 43 times [2023-01-28 09:29:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:04,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959282855] [2023-01-28 09:29:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:04,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:04,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959282855] [2023-01-28 09:29:04,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959282855] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:04,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128623267] [2023-01-28 09:29:04,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:29:04,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:04,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:04,448 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:04,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 09:29:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:04,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:29:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:04,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:04,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128623267] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:04,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:04,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 09:29:04,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559918133] [2023-01-28 09:29:04,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:04,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 09:29:04,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 09:29:04,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-01-28 09:29:04,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:29:04,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 692 transitions, 17068 flow. Second operand has 18 states, 18 states have (on average 157.11111111111111) internal successors, (2828), 18 states have internal predecessors, (2828), 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 09:29:04,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:04,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:29:04,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:06,269 INFO L130 PetriNetUnfolder]: 1648/3305 cut-off events. [2023-01-28 09:29:06,269 INFO L131 PetriNetUnfolder]: For 144278/144280 co-relation queries the response was YES. [2023-01-28 09:29:06,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36316 conditions, 3305 events. 1648/3305 cut-off events. For 144278/144280 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 24310 event pairs, 127 based on Foata normal form. 4/3304 useless extension candidates. Maximal degree in co-relation 36167. Up to 2910 conditions per place. [2023-01-28 09:29:06,325 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 612 selfloop transitions, 116 changer transitions 5/743 dead transitions. [2023-01-28 09:29:06,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 743 transitions, 19087 flow [2023-01-28 09:29:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 09:29:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 09:29:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1774 transitions. [2023-01-28 09:29:06,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914386584289497 [2023-01-28 09:29:06,328 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1774 transitions. [2023-01-28 09:29:06,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1774 transitions. [2023-01-28 09:29:06,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:06,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1774 transitions. [2023-01-28 09:29:06,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 161.27272727272728) internal successors, (1774), 11 states have internal predecessors, (1774), 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 09:29:06,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:29:06,332 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 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 09:29:06,332 INFO L175 Difference]: Start difference. First operand has 403 places, 692 transitions, 17068 flow. Second operand 11 states and 1774 transitions. [2023-01-28 09:29:06,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 743 transitions, 19087 flow [2023-01-28 09:29:07,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 743 transitions, 18935 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-01-28 09:29:07,794 INFO L231 Difference]: Finished difference. Result has 410 places, 702 transitions, 17441 flow [2023-01-28 09:29:07,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16924, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17441, PETRI_PLACES=410, PETRI_TRANSITIONS=702} [2023-01-28 09:29:07,795 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 390 predicate places. [2023-01-28 09:29:07,795 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 702 transitions, 17441 flow [2023-01-28 09:29:07,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 157.11111111111111) internal successors, (2828), 18 states have internal predecessors, (2828), 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 09:29:07,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:07,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:07,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-01-28 09:29:07,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-01-28 09:29:07,996 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:07,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:07,996 INFO L85 PathProgramCache]: Analyzing trace with hash 639122522, now seen corresponding path program 44 times [2023-01-28 09:29:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:07,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076851792] [2023-01-28 09:29:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:08,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:08,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076851792] [2023-01-28 09:29:08,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076851792] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664073444] [2023-01-28 09:29:08,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:29:08,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:08,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:08,302 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:08,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-28 09:29:08,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:29:08,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:08,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:29:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:08,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:08,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664073444] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:08,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:08,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 09:29:08,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038660001] [2023-01-28 09:29:08,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:08,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:29:08,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:08,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:29:08,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:29:08,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 412 [2023-01-28 09:29:08,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 702 transitions, 17441 flow. Second operand has 20 states, 20 states have (on average 157.0) internal successors, (3140), 20 states have internal predecessors, (3140), 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 09:29:08,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:08,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 412 [2023-01-28 09:29:08,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:10,177 INFO L130 PetriNetUnfolder]: 1644/3278 cut-off events. [2023-01-28 09:29:10,177 INFO L131 PetriNetUnfolder]: For 145082/145084 co-relation queries the response was YES. [2023-01-28 09:29:10,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36336 conditions, 3278 events. 1644/3278 cut-off events. For 145082/145084 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23893 event pairs, 134 based on Foata normal form. 3/3276 useless extension candidates. Maximal degree in co-relation 36185. Up to 2831 conditions per place. [2023-01-28 09:29:10,225 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 604 selfloop transitions, 119 changer transitions 5/738 dead transitions. [2023-01-28 09:29:10,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 738 transitions, 19267 flow [2023-01-28 09:29:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:29:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:29:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1457 transitions. [2023-01-28 09:29:10,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39293419633225457 [2023-01-28 09:29:10,227 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1457 transitions. [2023-01-28 09:29:10,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1457 transitions. [2023-01-28 09:29:10,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:10,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1457 transitions. [2023-01-28 09:29:10,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.88888888888889) internal successors, (1457), 9 states have internal predecessors, (1457), 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 09:29:10,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:29:10,229 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:29:10,229 INFO L175 Difference]: Start difference. First operand has 410 places, 702 transitions, 17441 flow. Second operand 9 states and 1457 transitions. [2023-01-28 09:29:10,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 738 transitions, 19267 flow [2023-01-28 09:29:11,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 738 transitions, 18983 flow, removed 42 selfloop flow, removed 8 redundant places. [2023-01-28 09:29:11,753 INFO L231 Difference]: Finished difference. Result has 412 places, 704 transitions, 17544 flow [2023-01-28 09:29:11,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=17163, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17544, PETRI_PLACES=412, PETRI_TRANSITIONS=704} [2023-01-28 09:29:11,754 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-01-28 09:29:11,754 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 704 transitions, 17544 flow [2023-01-28 09:29:11,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 157.0) internal successors, (3140), 20 states have internal predecessors, (3140), 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 09:29:11,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:11,754 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:11,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:11,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-28 09:29:11,956 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:11,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash 708283217, now seen corresponding path program 45 times [2023-01-28 09:29:11,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:11,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489045161] [2023-01-28 09:29:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:11,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:12,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:12,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489045161] [2023-01-28 09:29:12,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489045161] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:12,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372738572] [2023-01-28 09:29:12,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:29:12,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:12,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:12,078 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:12,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-28 09:29:12,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:29:12,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:12,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:29:12,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:12,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:12,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372738572] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:12,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:12,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-01-28 09:29:12,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713642023] [2023-01-28 09:29:12,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:12,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 09:29:12,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:12,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 09:29:12,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:29:12,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:29:12,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 704 transitions, 17544 flow. Second operand has 14 states, 14 states have (on average 169.21428571428572) internal successors, (2369), 14 states have internal predecessors, (2369), 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 09:29:12,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:12,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:29:12,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:14,129 INFO L130 PetriNetUnfolder]: 2101/4250 cut-off events. [2023-01-28 09:29:14,129 INFO L131 PetriNetUnfolder]: For 196854/196854 co-relation queries the response was YES. [2023-01-28 09:29:14,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46884 conditions, 4250 events. 2101/4250 cut-off events. For 196854/196854 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 32675 event pairs, 313 based on Foata normal form. 4/4254 useless extension candidates. Maximal degree in co-relation 46731. Up to 1463 conditions per place. [2023-01-28 09:29:14,182 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 549 selfloop transitions, 384 changer transitions 15/948 dead transitions. [2023-01-28 09:29:14,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 948 transitions, 25213 flow [2023-01-28 09:29:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 09:29:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 09:29:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2413 transitions. [2023-01-28 09:29:14,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183425797503467 [2023-01-28 09:29:14,184 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2413 transitions. [2023-01-28 09:29:14,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2413 transitions. [2023-01-28 09:29:14,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:14,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2413 transitions. [2023-01-28 09:29:14,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 172.35714285714286) internal successors, (2413), 14 states have internal predecessors, (2413), 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 09:29:14,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 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 09:29:14,188 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 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 09:29:14,188 INFO L175 Difference]: Start difference. First operand has 412 places, 704 transitions, 17544 flow. Second operand 14 states and 2413 transitions. [2023-01-28 09:29:14,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 948 transitions, 25213 flow [2023-01-28 09:29:15,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 948 transitions, 24802 flow, removed 72 selfloop flow, removed 6 redundant places. [2023-01-28 09:29:15,687 INFO L231 Difference]: Finished difference. Result has 424 places, 845 transitions, 22362 flow [2023-01-28 09:29:15,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=17262, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=22362, PETRI_PLACES=424, PETRI_TRANSITIONS=845} [2023-01-28 09:29:15,688 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 404 predicate places. [2023-01-28 09:29:15,688 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 845 transitions, 22362 flow [2023-01-28 09:29:15,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 169.21428571428572) internal successors, (2369), 14 states have internal predecessors, (2369), 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 09:29:15,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:15,688 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:15,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:15,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-28 09:29:15,889 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:15,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1132772869, now seen corresponding path program 46 times [2023-01-28 09:29:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:15,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615113976] [2023-01-28 09:29:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:15,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:15,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:15,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615113976] [2023-01-28 09:29:15,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615113976] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:15,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558424281] [2023-01-28 09:29:15,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:29:15,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:15,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:15,963 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:15,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-28 09:29:16,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:29:16,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:29:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:16,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:16,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558424281] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:16,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:16,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-01-28 09:29:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11841749] [2023-01-28 09:29:16,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:16,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 09:29:16,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:16,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 09:29:16,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:29:16,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:29:16,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 845 transitions, 22362 flow. Second operand has 14 states, 14 states have (on average 169.07142857142858) internal successors, (2367), 14 states have internal predecessors, (2367), 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 09:29:16,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:16,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:29:16,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:17,785 INFO L130 PetriNetUnfolder]: 2208/4437 cut-off events. [2023-01-28 09:29:17,785 INFO L131 PetriNetUnfolder]: For 223350/223350 co-relation queries the response was YES. [2023-01-28 09:29:17,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50770 conditions, 4437 events. 2208/4437 cut-off events. For 223350/223350 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34327 event pairs, 212 based on Foata normal form. 36/4473 useless extension candidates. Maximal degree in co-relation 50612. Up to 2556 conditions per place. [2023-01-28 09:29:17,844 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 707 selfloop transitions, 265 changer transitions 0/972 dead transitions. [2023-01-28 09:29:17,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 972 transitions, 27055 flow [2023-01-28 09:29:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:29:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:29:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1569 transitions. [2023-01-28 09:29:17,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231391585760518 [2023-01-28 09:29:17,846 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1569 transitions. [2023-01-28 09:29:17,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1569 transitions. [2023-01-28 09:29:17,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:17,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1569 transitions. [2023-01-28 09:29:17,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.33333333333334) internal successors, (1569), 9 states have internal predecessors, (1569), 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 09:29:17,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:29:17,850 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:29:17,850 INFO L175 Difference]: Start difference. First operand has 424 places, 845 transitions, 22362 flow. Second operand 9 states and 1569 transitions. [2023-01-28 09:29:17,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 972 transitions, 27055 flow [2023-01-28 09:29:19,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 972 transitions, 26120 flow, removed 283 selfloop flow, removed 9 redundant places. [2023-01-28 09:29:19,813 INFO L231 Difference]: Finished difference. Result has 424 places, 877 transitions, 23083 flow [2023-01-28 09:29:19,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=21430, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23083, PETRI_PLACES=424, PETRI_TRANSITIONS=877} [2023-01-28 09:29:19,814 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 404 predicate places. [2023-01-28 09:29:19,814 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 877 transitions, 23083 flow [2023-01-28 09:29:19,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 169.07142857142858) internal successors, (2367), 14 states have internal predecessors, (2367), 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 09:29:19,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:19,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:19,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:20,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-01-28 09:29:20,020 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:20,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 991055867, now seen corresponding path program 47 times [2023-01-28 09:29:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:20,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461356332] [2023-01-28 09:29:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:20,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:20,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:20,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461356332] [2023-01-28 09:29:20,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461356332] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:20,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749638683] [2023-01-28 09:29:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:29:20,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:20,083 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:20,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-28 09:29:20,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 09:29:20,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:20,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:29:20,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:20,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:20,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749638683] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:20,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:20,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-28 09:29:20,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535329989] [2023-01-28 09:29:20,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:20,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:29:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:29:20,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:29:20,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:29:20,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 877 transitions, 23083 flow. Second operand has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 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 09:29:20,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:20,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:29:20,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:22,308 INFO L130 PetriNetUnfolder]: 2459/4964 cut-off events. [2023-01-28 09:29:22,308 INFO L131 PetriNetUnfolder]: For 250906/250906 co-relation queries the response was YES. [2023-01-28 09:29:22,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57350 conditions, 4964 events. 2459/4964 cut-off events. For 250906/250906 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39471 event pairs, 182 based on Foata normal form. 62/5026 useless extension candidates. Maximal degree in co-relation 57192. Up to 3348 conditions per place. [2023-01-28 09:29:22,383 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 746 selfloop transitions, 307 changer transitions 0/1053 dead transitions. [2023-01-28 09:29:22,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1053 transitions, 29281 flow [2023-01-28 09:29:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 09:29:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 09:29:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3819 transitions. [2023-01-28 09:29:22,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42133715798764343 [2023-01-28 09:29:22,385 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3819 transitions. [2023-01-28 09:29:22,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3819 transitions. [2023-01-28 09:29:22,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:22,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3819 transitions. [2023-01-28 09:29:22,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 173.5909090909091) internal successors, (3819), 22 states have internal predecessors, (3819), 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 09:29:22,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 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 09:29:22,391 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 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 09:29:22,391 INFO L175 Difference]: Start difference. First operand has 424 places, 877 transitions, 23083 flow. Second operand 22 states and 3819 transitions. [2023-01-28 09:29:22,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1053 transitions, 29281 flow [2023-01-28 09:29:24,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1053 transitions, 28712 flow, removed 118 selfloop flow, removed 4 redundant places. [2023-01-28 09:29:24,705 INFO L231 Difference]: Finished difference. Result has 450 places, 951 transitions, 25904 flow [2023-01-28 09:29:24,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=22617, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25904, PETRI_PLACES=450, PETRI_TRANSITIONS=951} [2023-01-28 09:29:24,705 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 430 predicate places. [2023-01-28 09:29:24,705 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 951 transitions, 25904 flow [2023-01-28 09:29:24,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 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 09:29:24,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:24,706 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:24,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-01-28 09:29:24,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-01-28 09:29:24,906 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:24,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2067368727, now seen corresponding path program 48 times [2023-01-28 09:29:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:24,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422965464] [2023-01-28 09:29:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:24,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:24,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:24,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422965464] [2023-01-28 09:29:24,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422965464] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:24,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613026922] [2023-01-28 09:29:24,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:29:24,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:24,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:24,972 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:24,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-28 09:29:25,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 09:29:25,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:25,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:29:25,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:25,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:25,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613026922] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:25,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:25,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-28 09:29:25,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345108142] [2023-01-28 09:29:25,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:25,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 09:29:25,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:25,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 09:29:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-01-28 09:29:25,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:29:25,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 951 transitions, 25904 flow. Second operand has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 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 09:29:25,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:25,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:29:25,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:27,585 INFO L130 PetriNetUnfolder]: 2467/5022 cut-off events. [2023-01-28 09:29:27,585 INFO L131 PetriNetUnfolder]: For 269687/269687 co-relation queries the response was YES. [2023-01-28 09:29:27,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59757 conditions, 5022 events. 2467/5022 cut-off events. For 269687/269687 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 40318 event pairs, 391 based on Foata normal form. 24/5046 useless extension candidates. Maximal degree in co-relation 59590. Up to 2025 conditions per place. [2023-01-28 09:29:27,654 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 635 selfloop transitions, 451 changer transitions 12/1098 dead transitions. [2023-01-28 09:29:27,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1098 transitions, 30772 flow [2023-01-28 09:29:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 09:29:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 09:29:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4473 transitions. [2023-01-28 09:29:27,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41756908140403287 [2023-01-28 09:29:27,657 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4473 transitions. [2023-01-28 09:29:27,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4473 transitions. [2023-01-28 09:29:27,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:27,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4473 transitions. [2023-01-28 09:29:27,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 172.03846153846155) internal successors, (4473), 26 states have internal predecessors, (4473), 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 09:29:27,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 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 09:29:27,664 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 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 09:29:27,664 INFO L175 Difference]: Start difference. First operand has 450 places, 951 transitions, 25904 flow. Second operand 26 states and 4473 transitions. [2023-01-28 09:29:27,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1098 transitions, 30772 flow [2023-01-28 09:29:30,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1098 transitions, 29728 flow, removed 403 selfloop flow, removed 10 redundant places. [2023-01-28 09:29:30,171 INFO L231 Difference]: Finished difference. Result has 470 places, 964 transitions, 26544 flow [2023-01-28 09:29:30,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=24911, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26544, PETRI_PLACES=470, PETRI_TRANSITIONS=964} [2023-01-28 09:29:30,172 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 450 predicate places. [2023-01-28 09:29:30,172 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 964 transitions, 26544 flow [2023-01-28 09:29:30,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 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 09:29:30,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:30,172 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:30,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:30,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-01-28 09:29:30,373 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:30,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1532439073, now seen corresponding path program 49 times [2023-01-28 09:29:30,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:30,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500606213] [2023-01-28 09:29:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:30,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:30,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:30,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500606213] [2023-01-28 09:29:30,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500606213] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:30,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750091096] [2023-01-28 09:29:30,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:29:30,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:30,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:30,444 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:30,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-28 09:29:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:30,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:29:30,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:30,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:30,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750091096] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:30,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:30,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-28 09:29:30,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693817811] [2023-01-28 09:29:30,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:30,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:29:30,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:30,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:29:30,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:29:30,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:29:30,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 964 transitions, 26544 flow. Second operand has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 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 09:29:30,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:30,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:29:30,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:33,017 INFO L130 PetriNetUnfolder]: 2712/5497 cut-off events. [2023-01-28 09:29:33,018 INFO L131 PetriNetUnfolder]: For 320330/320330 co-relation queries the response was YES. [2023-01-28 09:29:33,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66845 conditions, 5497 events. 2712/5497 cut-off events. For 320330/320330 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 44732 event pairs, 338 based on Foata normal form. 44/5541 useless extension candidates. Maximal degree in co-relation 66674. Up to 1774 conditions per place. [2023-01-28 09:29:33,102 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 653 selfloop transitions, 534 changer transitions 11/1198 dead transitions. [2023-01-28 09:29:33,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1198 transitions, 34181 flow [2023-01-28 09:29:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 09:29:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 09:29:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4653 transitions. [2023-01-28 09:29:33,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41828478964401294 [2023-01-28 09:29:33,104 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4653 transitions. [2023-01-28 09:29:33,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4653 transitions. [2023-01-28 09:29:33,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:33,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4653 transitions. [2023-01-28 09:29:33,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 172.33333333333334) internal successors, (4653), 27 states have internal predecessors, (4653), 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 09:29:33,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 412.0) internal successors, (11536), 28 states have internal predecessors, (11536), 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 09:29:33,112 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 412.0) internal successors, (11536), 28 states have internal predecessors, (11536), 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 09:29:33,112 INFO L175 Difference]: Start difference. First operand has 470 places, 964 transitions, 26544 flow. Second operand 27 states and 4653 transitions. [2023-01-28 09:29:33,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1198 transitions, 34181 flow [2023-01-28 09:29:36,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 1198 transitions, 33264 flow, removed 132 selfloop flow, removed 14 redundant places. [2023-01-28 09:29:36,273 INFO L231 Difference]: Finished difference. Result has 485 places, 1027 transitions, 29279 flow [2023-01-28 09:29:36,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=25364, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29279, PETRI_PLACES=485, PETRI_TRANSITIONS=1027} [2023-01-28 09:29:36,274 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 465 predicate places. [2023-01-28 09:29:36,274 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 1027 transitions, 29279 flow [2023-01-28 09:29:36,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 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 09:29:36,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:36,274 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:36,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:36,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:36,480 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:36,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:36,480 INFO L85 PathProgramCache]: Analyzing trace with hash 141695673, now seen corresponding path program 50 times [2023-01-28 09:29:36,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:36,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455624017] [2023-01-28 09:29:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:36,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:36,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:36,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455624017] [2023-01-28 09:29:36,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455624017] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:36,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460239318] [2023-01-28 09:29:36,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:29:36,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:36,546 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:36,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-28 09:29:36,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:29:36,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:29:36,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:36,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:36,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460239318] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:36,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:36,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-28 09:29:36,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657915124] [2023-01-28 09:29:36,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:36,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:29:36,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:36,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:29:36,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:29:36,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:29:36,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1027 transitions, 29279 flow. Second operand has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 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 09:29:36,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:36,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:29:36,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:39,267 INFO L130 PetriNetUnfolder]: 2655/5348 cut-off events. [2023-01-28 09:29:39,267 INFO L131 PetriNetUnfolder]: For 315845/315845 co-relation queries the response was YES. [2023-01-28 09:29:39,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65883 conditions, 5348 events. 2655/5348 cut-off events. For 315845/315845 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 43038 event pairs, 66 based on Foata normal form. 20/5368 useless extension candidates. Maximal degree in co-relation 65710. Up to 1475 conditions per place. [2023-01-28 09:29:39,349 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 632 selfloop transitions, 495 changer transitions 5/1132 dead transitions. [2023-01-28 09:29:39,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1132 transitions, 33907 flow [2023-01-28 09:29:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 09:29:39,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 09:29:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4813 transitions. [2023-01-28 09:29:39,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41721567267683773 [2023-01-28 09:29:39,352 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4813 transitions. [2023-01-28 09:29:39,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4813 transitions. [2023-01-28 09:29:39,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:39,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4813 transitions. [2023-01-28 09:29:39,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 171.89285714285714) internal successors, (4813), 28 states have internal predecessors, (4813), 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 09:29:39,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 412.0) internal successors, (11948), 29 states have internal predecessors, (11948), 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 09:29:39,359 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 412.0) internal successors, (11948), 29 states have internal predecessors, (11948), 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 09:29:39,359 INFO L175 Difference]: Start difference. First operand has 485 places, 1027 transitions, 29279 flow. Second operand 28 states and 4813 transitions. [2023-01-28 09:29:39,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1132 transitions, 33907 flow [2023-01-28 09:29:42,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 1132 transitions, 32686 flow, removed 397 selfloop flow, removed 15 redundant places. [2023-01-28 09:29:42,583 INFO L231 Difference]: Finished difference. Result has 499 places, 1044 transitions, 30195 flow [2023-01-28 09:29:42,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=27851, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30195, PETRI_PLACES=499, PETRI_TRANSITIONS=1044} [2023-01-28 09:29:42,585 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 479 predicate places. [2023-01-28 09:29:42,585 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1044 transitions, 30195 flow [2023-01-28 09:29:42,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 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 09:29:42,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:42,586 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:42,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:42,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:42,792 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:42,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1528904067, now seen corresponding path program 51 times [2023-01-28 09:29:42,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:42,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540891143] [2023-01-28 09:29:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:42,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:42,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:42,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540891143] [2023-01-28 09:29:42,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540891143] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:42,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265559164] [2023-01-28 09:29:42,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:29:42,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:42,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:42,864 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:42,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-28 09:29:42,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 09:29:42,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:43,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:29:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:43,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:43,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265559164] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:43,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:43,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-28 09:29:43,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824644283] [2023-01-28 09:29:43,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:43,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:29:43,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:43,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:29:43,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:29:43,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:29:43,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1044 transitions, 30195 flow. Second operand has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 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 09:29:43,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:43,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:29:43,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:46,464 INFO L130 PetriNetUnfolder]: 2961/5996 cut-off events. [2023-01-28 09:29:46,464 INFO L131 PetriNetUnfolder]: For 380651/380651 co-relation queries the response was YES. [2023-01-28 09:29:46,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75386 conditions, 5996 events. 2961/5996 cut-off events. For 380651/380651 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 49302 event pairs, 550 based on Foata normal form. 36/6032 useless extension candidates. Maximal degree in co-relation 75210. Up to 2610 conditions per place. [2023-01-28 09:29:46,550 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 793 selfloop transitions, 491 changer transitions 1/1285 dead transitions. [2023-01-28 09:29:46,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1285 transitions, 39499 flow [2023-01-28 09:29:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 09:29:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 09:29:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3805 transitions. [2023-01-28 09:29:46,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.419792586054722 [2023-01-28 09:29:46,552 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3805 transitions. [2023-01-28 09:29:46,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3805 transitions. [2023-01-28 09:29:46,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:46,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3805 transitions. [2023-01-28 09:29:46,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 172.95454545454547) internal successors, (3805), 22 states have internal predecessors, (3805), 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 09:29:46,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 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 09:29:46,558 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 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 09:29:46,558 INFO L175 Difference]: Start difference. First operand has 499 places, 1044 transitions, 30195 flow. Second operand 22 states and 3805 transitions. [2023-01-28 09:29:46,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1285 transitions, 39499 flow [2023-01-28 09:29:49,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1285 transitions, 37168 flow, removed 750 selfloop flow, removed 13 redundant places. [2023-01-28 09:29:49,892 INFO L231 Difference]: Finished difference. Result has 513 places, 1128 transitions, 32628 flow [2023-01-28 09:29:49,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=28071, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=32628, PETRI_PLACES=513, PETRI_TRANSITIONS=1128} [2023-01-28 09:29:49,893 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 493 predicate places. [2023-01-28 09:29:49,893 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1128 transitions, 32628 flow [2023-01-28 09:29:49,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 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 09:29:49,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:49,894 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:49,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:50,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:50,100 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:50,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:50,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1593843127, now seen corresponding path program 52 times [2023-01-28 09:29:50,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:50,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447074854] [2023-01-28 09:29:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:50,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:50,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:50,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447074854] [2023-01-28 09:29:50,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447074854] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:50,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840516798] [2023-01-28 09:29:50,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:29:50,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:50,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:50,164 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:50,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-28 09:29:50,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:29:50,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:29:50,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:50,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:50,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840516798] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:50,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:50,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-28 09:29:50,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048989571] [2023-01-28 09:29:50,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:50,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:29:50,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:50,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:29:50,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:29:50,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:29:50,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1128 transitions, 32628 flow. Second operand has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 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 09:29:50,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:50,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:29:50,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:53,586 INFO L130 PetriNetUnfolder]: 2885/5874 cut-off events. [2023-01-28 09:29:53,586 INFO L131 PetriNetUnfolder]: For 355261/355261 co-relation queries the response was YES. [2023-01-28 09:29:53,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73058 conditions, 5874 events. 2885/5874 cut-off events. For 355261/355261 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 48233 event pairs, 326 based on Foata normal form. 64/5938 useless extension candidates. Maximal degree in co-relation 72878. Up to 1686 conditions per place. [2023-01-28 09:29:53,672 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 680 selfloop transitions, 604 changer transitions 12/1296 dead transitions. [2023-01-28 09:29:53,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1296 transitions, 38795 flow [2023-01-28 09:29:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 09:29:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 09:29:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5334 transitions. [2023-01-28 09:29:53,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176323207015346 [2023-01-28 09:29:53,675 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5334 transitions. [2023-01-28 09:29:53,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5334 transitions. [2023-01-28 09:29:53,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:53,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5334 transitions. [2023-01-28 09:29:53,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 172.06451612903226) internal successors, (5334), 31 states have internal predecessors, (5334), 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 09:29:53,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 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 09:29:53,683 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 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 09:29:53,683 INFO L175 Difference]: Start difference. First operand has 513 places, 1128 transitions, 32628 flow. Second operand 31 states and 5334 transitions. [2023-01-28 09:29:53,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1296 transitions, 38795 flow [2023-01-28 09:29:57,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1296 transitions, 38048 flow, removed 293 selfloop flow, removed 10 redundant places. [2023-01-28 09:29:57,300 INFO L231 Difference]: Finished difference. Result has 533 places, 1126 transitions, 33730 flow [2023-01-28 09:29:57,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=31261, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=33730, PETRI_PLACES=533, PETRI_TRANSITIONS=1126} [2023-01-28 09:29:57,301 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 513 predicate places. [2023-01-28 09:29:57,301 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1126 transitions, 33730 flow [2023-01-28 09:29:57,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 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 09:29:57,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:57,301 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:57,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:57,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-01-28 09:29:57,507 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:57,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash 578571649, now seen corresponding path program 53 times [2023-01-28 09:29:57,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:57,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697545310] [2023-01-28 09:29:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:57,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:57,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:57,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697545310] [2023-01-28 09:29:57,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697545310] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:57,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144925698] [2023-01-28 09:29:57,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:29:57,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:57,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:57,574 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:57,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-28 09:29:57,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:29:57,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:57,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:29:57,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:57,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:57,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144925698] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:57,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:57,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 09:29:57,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027668511] [2023-01-28 09:29:57,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:57,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 09:29:57,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 09:29:57,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-01-28 09:29:57,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:29:57,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1126 transitions, 33730 flow. Second operand has 18 states, 18 states have (on average 169.05555555555554) internal successors, (3043), 18 states have internal predecessors, (3043), 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 09:29:57,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:57,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:29:57,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:30:01,391 INFO L130 PetriNetUnfolder]: 3350/6697 cut-off events. [2023-01-28 09:30:01,391 INFO L131 PetriNetUnfolder]: For 413277/413277 co-relation queries the response was YES. [2023-01-28 09:30:01,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85488 conditions, 6697 events. 3350/6697 cut-off events. For 413277/413277 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 55449 event pairs, 288 based on Foata normal form. 78/6775 useless extension candidates. Maximal degree in co-relation 85306. Up to 5716 conditions per place. [2023-01-28 09:30:01,490 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1144 selfloop transitions, 226 changer transitions 0/1370 dead transitions. [2023-01-28 09:30:01,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1370 transitions, 42462 flow [2023-01-28 09:30:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 09:30:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 09:30:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3472 transitions. [2023-01-28 09:30:01,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42135922330097086 [2023-01-28 09:30:01,492 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3472 transitions. [2023-01-28 09:30:01,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3472 transitions. [2023-01-28 09:30:01,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:30:01,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3472 transitions. [2023-01-28 09:30:01,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 173.6) internal successors, (3472), 20 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 09:30:01,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 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 09:30:01,497 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 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 09:30:01,497 INFO L175 Difference]: Start difference. First operand has 533 places, 1126 transitions, 33730 flow. Second operand 20 states and 3472 transitions. [2023-01-28 09:30:01,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1370 transitions, 42462 flow [2023-01-28 09:30:06,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1370 transitions, 41117 flow, removed 337 selfloop flow, removed 20 redundant places. [2023-01-28 09:30:06,108 INFO L231 Difference]: Finished difference. Result has 540 places, 1281 transitions, 37880 flow [2023-01-28 09:30:06,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=32406, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=37880, PETRI_PLACES=540, PETRI_TRANSITIONS=1281} [2023-01-28 09:30:06,109 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2023-01-28 09:30:06,109 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 1281 transitions, 37880 flow [2023-01-28 09:30:06,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 169.05555555555554) internal successors, (3043), 18 states have internal predecessors, (3043), 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 09:30:06,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:30:06,110 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:30:06,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-28 09:30:06,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-01-28 09:30:06,311 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:30:06,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:30:06,311 INFO L85 PathProgramCache]: Analyzing trace with hash 240245433, now seen corresponding path program 54 times [2023-01-28 09:30:06,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:30:06,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912798280] [2023-01-28 09:30:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:30:06,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:30:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:30:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:06,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:30:06,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912798280] [2023-01-28 09:30:06,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912798280] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:30:06,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139610287] [2023-01-28 09:30:06,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:30:06,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:06,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:30:06,377 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:30:06,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-28 09:30:06,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 09:30:06,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:30:06,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:30:06,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:30:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:06,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:30:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:06,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139610287] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:30:06,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:30:06,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-01-28 09:30:06,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675233985] [2023-01-28 09:30:06,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:30:06,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:30:06,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:30:06,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:30:06,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:30:06,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:30:06,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1281 transitions, 37880 flow. Second operand has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 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 09:30:06,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:30:06,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:30:06,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:30:10,940 INFO L130 PetriNetUnfolder]: 3832/7695 cut-off events. [2023-01-28 09:30:10,940 INFO L131 PetriNetUnfolder]: For 499496/499496 co-relation queries the response was YES. [2023-01-28 09:30:11,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99848 conditions, 7695 events. 3832/7695 cut-off events. For 499496/499496 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 65821 event pairs, 166 based on Foata normal form. 166/7861 useless extension candidates. Maximal degree in co-relation 99656. Up to 3135 conditions per place. [2023-01-28 09:30:11,070 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 879 selfloop transitions, 676 changer transitions 1/1556 dead transitions. [2023-01-28 09:30:11,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1556 transitions, 49153 flow [2023-01-28 09:30:11,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 09:30:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 09:30:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3986 transitions. [2023-01-28 09:30:11,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206416209371043 [2023-01-28 09:30:11,073 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3986 transitions. [2023-01-28 09:30:11,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3986 transitions. [2023-01-28 09:30:11,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:30:11,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3986 transitions. [2023-01-28 09:30:11,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 173.30434782608697) internal successors, (3986), 23 states have internal predecessors, (3986), 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 09:30:11,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 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 09:30:11,080 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 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 09:30:11,080 INFO L175 Difference]: Start difference. First operand has 540 places, 1281 transitions, 37880 flow. Second operand 23 states and 3986 transitions. [2023-01-28 09:30:11,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1556 transitions, 49153 flow [2023-01-28 09:30:16,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1556 transitions, 48246 flow, removed 318 selfloop flow, removed 7 redundant places. [2023-01-28 09:30:16,828 INFO L231 Difference]: Finished difference. Result has 560 places, 1416 transitions, 44202 flow [2023-01-28 09:30:16,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=36719, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=44202, PETRI_PLACES=560, PETRI_TRANSITIONS=1416} [2023-01-28 09:30:16,829 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 540 predicate places. [2023-01-28 09:30:16,829 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 1416 transitions, 44202 flow [2023-01-28 09:30:16,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 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 09:30:16,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:30:16,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:30:16,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-01-28 09:30:17,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:17,030 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:30:17,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:30:17,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1169476999, now seen corresponding path program 55 times [2023-01-28 09:30:17,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:30:17,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491275091] [2023-01-28 09:30:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:30:17,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:30:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:30:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:17,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:30:17,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491275091] [2023-01-28 09:30:17,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491275091] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:30:17,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000017440] [2023-01-28 09:30:17,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:30:17,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:17,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:30:17,097 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:30:17,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-28 09:30:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:30:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:30:17,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:30:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:17,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:30:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:17,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000017440] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:30:17,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:30:17,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-28 09:30:17,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886453816] [2023-01-28 09:30:17,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:30:17,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 09:30:17,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:30:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 09:30:17,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-01-28 09:30:17,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:30:17,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 1416 transitions, 44202 flow. Second operand has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 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 09:30:17,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:30:17,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:30:17,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:30:21,890 INFO L130 PetriNetUnfolder]: 3871/7710 cut-off events. [2023-01-28 09:30:21,890 INFO L131 PetriNetUnfolder]: For 531496/531496 co-relation queries the response was YES. [2023-01-28 09:30:21,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103760 conditions, 7710 events. 3871/7710 cut-off events. For 531496/531496 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 65452 event pairs, 158 based on Foata normal form. 50/7760 useless extension candidates. Maximal degree in co-relation 103564. Up to 2496 conditions per place. [2023-01-28 09:30:22,009 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 739 selfloop transitions, 795 changer transitions 15/1549 dead transitions. [2023-01-28 09:30:22,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1549 transitions, 50834 flow [2023-01-28 09:30:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 09:30:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 09:30:22,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5318 transitions. [2023-01-28 09:30:22,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4163795803319762 [2023-01-28 09:30:22,012 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5318 transitions. [2023-01-28 09:30:22,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5318 transitions. [2023-01-28 09:30:22,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:30:22,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5318 transitions. [2023-01-28 09:30:22,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 171.5483870967742) internal successors, (5318), 31 states have internal predecessors, (5318), 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 09:30:22,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 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 09:30:22,020 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 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 09:30:22,020 INFO L175 Difference]: Start difference. First operand has 560 places, 1416 transitions, 44202 flow. Second operand 31 states and 5318 transitions. [2023-01-28 09:30:22,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1549 transitions, 50834 flow [2023-01-28 09:30:28,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1549 transitions, 49512 flow, removed 413 selfloop flow, removed 16 redundant places. [2023-01-28 09:30:28,858 INFO L231 Difference]: Finished difference. Result has 580 places, 1443 transitions, 46817 flow [2023-01-28 09:30:28,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=42222, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=46817, PETRI_PLACES=580, PETRI_TRANSITIONS=1443} [2023-01-28 09:30:28,859 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2023-01-28 09:30:28,859 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1443 transitions, 46817 flow [2023-01-28 09:30:28,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 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 09:30:28,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:30:28,860 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:30:28,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-01-28 09:30:29,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:29,065 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:30:29,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:30:29,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1133843129, now seen corresponding path program 56 times [2023-01-28 09:30:29,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:30:29,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520596254] [2023-01-28 09:30:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:30:29,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:30:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:30:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:29,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:30:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520596254] [2023-01-28 09:30:29,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520596254] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:30:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449546764] [2023-01-28 09:30:29,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:30:29,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:29,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:30:29,142 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:30:29,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-28 09:30:29,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:30:29,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:30:29,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:30:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:30:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:29,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:30:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:29,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449546764] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:30:29,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:30:29,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 09:30:29,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174969950] [2023-01-28 09:30:29,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:30:29,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 09:30:29,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:30:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 09:30:29,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-01-28 09:30:29,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:30:29,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1443 transitions, 46817 flow. Second operand has 20 states, 20 states have (on average 168.55) internal successors, (3371), 20 states have internal predecessors, (3371), 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 09:30:29,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:30:29,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:30:29,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:30:34,525 INFO L130 PetriNetUnfolder]: 4126/8265 cut-off events. [2023-01-28 09:30:34,526 INFO L131 PetriNetUnfolder]: For 609088/609088 co-relation queries the response was YES. [2023-01-28 09:30:34,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114945 conditions, 8265 events. 4126/8265 cut-off events. For 609088/609088 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 71258 event pairs, 180 based on Foata normal form. 40/8305 useless extension candidates. Maximal degree in co-relation 114748. Up to 2325 conditions per place. [2023-01-28 09:30:34,662 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 712 selfloop transitions, 916 changer transitions 20/1648 dead transitions. [2023-01-28 09:30:34,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1648 transitions, 56577 flow [2023-01-28 09:30:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 09:30:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 09:30:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5834 transitions. [2023-01-28 09:30:34,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41647629925756713 [2023-01-28 09:30:34,665 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5834 transitions. [2023-01-28 09:30:34,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5834 transitions. [2023-01-28 09:30:34,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:30:34,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5834 transitions. [2023-01-28 09:30:34,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 171.58823529411765) internal successors, (5834), 34 states have internal predecessors, (5834), 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 09:30:34,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 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 09:30:34,674 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 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 09:30:34,674 INFO L175 Difference]: Start difference. First operand has 580 places, 1443 transitions, 46817 flow. Second operand 34 states and 5834 transitions. [2023-01-28 09:30:34,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1648 transitions, 56577 flow [2023-01-28 09:30:43,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1648 transitions, 55166 flow, removed 592 selfloop flow, removed 14 redundant places. [2023-01-28 09:30:43,274 INFO L231 Difference]: Finished difference. Result has 604 places, 1531 transitions, 52715 flow [2023-01-28 09:30:43,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=45212, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=52715, PETRI_PLACES=604, PETRI_TRANSITIONS=1531} [2023-01-28 09:30:43,275 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 584 predicate places. [2023-01-28 09:30:43,275 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1531 transitions, 52715 flow [2023-01-28 09:30:43,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 168.55) internal successors, (3371), 20 states have internal predecessors, (3371), 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 09:30:43,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:30:43,275 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:30:43,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-01-28 09:30:43,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-01-28 09:30:43,476 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:30:43,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:30:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1710707121, now seen corresponding path program 57 times [2023-01-28 09:30:43,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:30:43,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020873340] [2023-01-28 09:30:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:30:43,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:30:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:30:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:43,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:30:43,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020873340] [2023-01-28 09:30:43,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020873340] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:30:43,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751367152] [2023-01-28 09:30:43,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:30:43,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:43,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:30:43,538 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:30:43,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-28 09:30:43,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 09:30:43,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:30:43,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:30:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:30:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:43,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:30:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:43,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751367152] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:30:43,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:30:43,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-01-28 09:30:43,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367444871] [2023-01-28 09:30:43,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:30:43,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:30:43,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:30:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:30:43,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:30:43,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:30:43,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1531 transitions, 52715 flow. Second operand has 17 states, 17 states have (on average 168.94117647058823) internal successors, (2872), 17 states have internal predecessors, (2872), 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 09:30:43,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:30:43,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:30:43,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:30:50,232 INFO L130 PetriNetUnfolder]: 4921/9910 cut-off events. [2023-01-28 09:30:50,233 INFO L131 PetriNetUnfolder]: For 806267/806267 co-relation queries the response was YES. [2023-01-28 09:30:50,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143672 conditions, 9910 events. 4921/9910 cut-off events. For 806267/806267 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 88796 event pairs, 210 based on Foata normal form. 42/9952 useless extension candidates. Maximal degree in co-relation 143470. Up to 3017 conditions per place. [2023-01-28 09:30:50,397 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 946 selfloop transitions, 984 changer transitions 0/1930 dead transitions. [2023-01-28 09:30:50,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1930 transitions, 70216 flow [2023-01-28 09:30:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 09:30:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 09:30:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4160 transitions. [2023-01-28 09:30:50,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42071197411003236 [2023-01-28 09:30:50,400 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4160 transitions. [2023-01-28 09:30:50,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4160 transitions. [2023-01-28 09:30:50,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:30:50,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4160 transitions. [2023-01-28 09:30:50,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 173.33333333333334) internal successors, (4160), 24 states have internal predecessors, (4160), 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 09:30:50,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 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 09:30:50,406 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 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 09:30:50,406 INFO L175 Difference]: Start difference. First operand has 604 places, 1531 transitions, 52715 flow. Second operand 24 states and 4160 transitions. [2023-01-28 09:30:50,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1930 transitions, 70216 flow [2023-01-28 09:31:03,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1930 transitions, 68114 flow, removed 886 selfloop flow, removed 14 redundant places. [2023-01-28 09:31:03,124 INFO L231 Difference]: Finished difference. Result has 614 places, 1764 transitions, 63542 flow [2023-01-28 09:31:03,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=50405, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=63542, PETRI_PLACES=614, PETRI_TRANSITIONS=1764} [2023-01-28 09:31:03,126 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 594 predicate places. [2023-01-28 09:31:03,126 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 1764 transitions, 63542 flow [2023-01-28 09:31:03,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.94117647058823) internal successors, (2872), 17 states have internal predecessors, (2872), 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 09:31:03,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:31:03,126 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:31:03,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-01-28 09:31:03,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-01-28 09:31:03,327 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:31:03,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:31:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash 695910137, now seen corresponding path program 58 times [2023-01-28 09:31:03,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:31:03,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521475925] [2023-01-28 09:31:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:31:03,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:31:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:31:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:03,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:31:03,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521475925] [2023-01-28 09:31:03,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521475925] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:31:03,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57370255] [2023-01-28 09:31:03,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:31:03,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:31:03,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:31:03,401 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:31:03,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-01-28 09:31:03,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:31:03,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:31:03,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:31:03,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:31:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:03,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:31:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:03,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57370255] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:31:03,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:31:03,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-01-28 09:31:03,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294798099] [2023-01-28 09:31:03,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:31:03,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 09:31:03,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:31:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 09:31:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:31:03,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:31:03,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1764 transitions, 63542 flow. Second operand has 14 states, 14 states have (on average 168.85714285714286) internal successors, (2364), 14 states have internal predecessors, (2364), 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 09:31:03,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:31:03,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:31:03,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:31:10,773 INFO L130 PetriNetUnfolder]: 5132/10371 cut-off events. [2023-01-28 09:31:10,774 INFO L131 PetriNetUnfolder]: For 847197/847197 co-relation queries the response was YES. [2023-01-28 09:31:10,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151560 conditions, 10371 events. 5132/10371 cut-off events. For 847197/847197 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 93994 event pairs, 866 based on Foata normal form. 2/10373 useless extension candidates. Maximal degree in co-relation 151352. Up to 5072 conditions per place. [2023-01-28 09:31:10,953 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1206 selfloop transitions, 681 changer transitions 7/1894 dead transitions. [2023-01-28 09:31:10,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 1894 transitions, 70985 flow [2023-01-28 09:31:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 09:31:10,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 09:31:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2403 transitions. [2023-01-28 09:31:10,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41660887656033285 [2023-01-28 09:31:10,955 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2403 transitions. [2023-01-28 09:31:10,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2403 transitions. [2023-01-28 09:31:10,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:31:10,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2403 transitions. [2023-01-28 09:31:10,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 171.64285714285714) internal successors, (2403), 14 states have internal predecessors, (2403), 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 09:31:10,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 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 09:31:10,959 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 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 09:31:10,959 INFO L175 Difference]: Start difference. First operand has 614 places, 1764 transitions, 63542 flow. Second operand 14 states and 2403 transitions. [2023-01-28 09:31:10,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 1894 transitions, 70985 flow [2023-01-28 09:31:24,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1894 transitions, 69549 flow, removed 603 selfloop flow, removed 12 redundant places. [2023-01-28 09:31:24,908 INFO L231 Difference]: Finished difference. Result has 621 places, 1839 transitions, 66647 flow [2023-01-28 09:31:24,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=62147, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=66647, PETRI_PLACES=621, PETRI_TRANSITIONS=1839} [2023-01-28 09:31:24,909 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 601 predicate places. [2023-01-28 09:31:24,909 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1839 transitions, 66647 flow [2023-01-28 09:31:24,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 168.85714285714286) internal successors, (2364), 14 states have internal predecessors, (2364), 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 09:31:24,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:31:24,909 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:31:24,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-01-28 09:31:25,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:31:25,110 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:31:25,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:31:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash 644662819, now seen corresponding path program 59 times [2023-01-28 09:31:25,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:31:25,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899641631] [2023-01-28 09:31:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:31:25,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:31:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:31:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:25,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:31:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899641631] [2023-01-28 09:31:25,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899641631] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:31:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429557192] [2023-01-28 09:31:25,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:31:25,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:31:25,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:31:25,178 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:31:25,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-01-28 09:31:25,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:31:25,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:31:25,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:31:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:31:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:25,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:31:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:25,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429557192] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:31:25,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:31:25,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-01-28 09:31:25,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803627395] [2023-01-28 09:31:25,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:31:25,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 09:31:25,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:31:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 09:31:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:31:25,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:31:25,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1839 transitions, 66647 flow. Second operand has 14 states, 14 states have (on average 168.85714285714286) internal successors, (2364), 14 states have internal predecessors, (2364), 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 09:31:25,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:31:25,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:31:25,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:31:33,169 INFO L130 PetriNetUnfolder]: 5258/10573 cut-off events. [2023-01-28 09:31:33,169 INFO L131 PetriNetUnfolder]: For 821197/821197 co-relation queries the response was YES. [2023-01-28 09:31:33,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154480 conditions, 10573 events. 5258/10573 cut-off events. For 821197/821197 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 95639 event pairs, 221 based on Foata normal form. 30/10603 useless extension candidates. Maximal degree in co-relation 154268. Up to 7874 conditions per place. [2023-01-28 09:31:33,457 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 1433 selfloop transitions, 517 changer transitions 0/1950 dead transitions. [2023-01-28 09:31:33,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1950 transitions, 73556 flow [2023-01-28 09:31:33,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:31:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:31:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1561 transitions. [2023-01-28 09:31:33,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209816612729234 [2023-01-28 09:31:33,459 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1561 transitions. [2023-01-28 09:31:33,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1561 transitions. [2023-01-28 09:31:33,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:31:33,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1561 transitions. [2023-01-28 09:31:33,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.44444444444446) internal successors, (1561), 9 states have internal predecessors, (1561), 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 09:31:33,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:31:33,461 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 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 09:31:33,461 INFO L175 Difference]: Start difference. First operand has 621 places, 1839 transitions, 66647 flow. Second operand 9 states and 1561 transitions. [2023-01-28 09:31:33,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1950 transitions, 73556 flow [2023-01-28 09:31:48,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1950 transitions, 72812 flow, removed 121 selfloop flow, removed 9 redundant places. [2023-01-28 09:31:48,486 INFO L231 Difference]: Finished difference. Result has 621 places, 1888 transitions, 68972 flow [2023-01-28 09:31:48,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=65904, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=68972, PETRI_PLACES=621, PETRI_TRANSITIONS=1888} [2023-01-28 09:31:48,487 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 601 predicate places. [2023-01-28 09:31:48,487 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1888 transitions, 68972 flow [2023-01-28 09:31:48,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 168.85714285714286) internal successors, (2364), 14 states have internal predecessors, (2364), 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 09:31:48,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:31:48,488 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:31:48,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-01-28 09:31:48,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-01-28 09:31:48,688 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:31:48,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:31:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2004137547, now seen corresponding path program 60 times [2023-01-28 09:31:48,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:31:48,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131155371] [2023-01-28 09:31:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:31:48,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:31:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:31:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:48,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:31:48,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131155371] [2023-01-28 09:31:48,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131155371] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:31:48,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421556076] [2023-01-28 09:31:48,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:31:48,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:31:48,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:31:48,748 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:31:48,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-01-28 09:31:48,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 09:31:48,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:31:48,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:31:48,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:31:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:48,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:31:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:31:48,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421556076] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:31:48,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:31:48,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2023-01-28 09:31:48,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058009519] [2023-01-28 09:31:48,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:31:48,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 09:31:48,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:31:48,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 09:31:48,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-01-28 09:31:48,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:31:48,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1888 transitions, 68972 flow. Second operand has 16 states, 16 states have (on average 168.8125) internal successors, (2701), 16 states have internal predecessors, (2701), 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 09:31:48,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:31:48,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:31:48,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:31:57,528 INFO L130 PetriNetUnfolder]: 5548/11175 cut-off events. [2023-01-28 09:31:57,528 INFO L131 PetriNetUnfolder]: For 880610/880610 co-relation queries the response was YES. [2023-01-28 09:31:57,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164192 conditions, 11175 events. 5548/11175 cut-off events. For 880610/880610 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 102302 event pairs, 795 based on Foata normal form. 16/11191 useless extension candidates. Maximal degree in co-relation 163980. Up to 3253 conditions per place. [2023-01-28 09:31:57,732 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1261 selfloop transitions, 825 changer transitions 10/2096 dead transitions. [2023-01-28 09:31:57,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 2096 transitions, 78971 flow [2023-01-28 09:31:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 09:31:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 09:31:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4129 transitions. [2023-01-28 09:31:57,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175768608414239 [2023-01-28 09:31:57,735 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4129 transitions. [2023-01-28 09:31:57,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4129 transitions. [2023-01-28 09:31:57,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:31:57,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4129 transitions. [2023-01-28 09:31:57,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 172.04166666666666) internal successors, (4129), 24 states have internal predecessors, (4129), 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 09:31:57,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 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 09:31:57,741 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 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 09:31:57,741 INFO L175 Difference]: Start difference. First operand has 621 places, 1888 transitions, 68972 flow. Second operand 24 states and 4129 transitions. [2023-01-28 09:31:57,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 2096 transitions, 78971 flow [2023-01-28 09:32:13,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 2096 transitions, 78314 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-01-28 09:32:13,899 INFO L231 Difference]: Finished difference. Result has 648 places, 1982 transitions, 74899 flow [2023-01-28 09:32:13,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=68185, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=74899, PETRI_PLACES=648, PETRI_TRANSITIONS=1982} [2023-01-28 09:32:13,900 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 628 predicate places. [2023-01-28 09:32:13,900 INFO L495 AbstractCegarLoop]: Abstraction has has 648 places, 1982 transitions, 74899 flow [2023-01-28 09:32:13,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.8125) internal successors, (2701), 16 states have internal predecessors, (2701), 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 09:32:13,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:32:13,901 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:32:13,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-01-28 09:32:14,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:32:14,102 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:32:14,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:32:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2099469555, now seen corresponding path program 61 times [2023-01-28 09:32:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:32:14,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911397217] [2023-01-28 09:32:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:32:14,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:32:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:32:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:32:14,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:32:14,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911397217] [2023-01-28 09:32:14,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911397217] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:32:14,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484929716] [2023-01-28 09:32:14,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:32:14,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:32:14,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:32:14,164 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:32:14,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-01-28 09:32:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:32:14,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:32:14,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:32:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:32:14,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:32:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:32:14,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484929716] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:32:14,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:32:14,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 09:32:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764213898] [2023-01-28 09:32:14,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:32:14,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 09:32:14,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:32:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 09:32:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-01-28 09:32:14,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:32:14,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 1982 transitions, 74899 flow. Second operand has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 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 09:32:14,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:32:14,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:32:14,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:32:24,112 INFO L130 PetriNetUnfolder]: 5625/11332 cut-off events. [2023-01-28 09:32:24,112 INFO L131 PetriNetUnfolder]: For 987381/987381 co-relation queries the response was YES. [2023-01-28 09:32:24,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172202 conditions, 11332 events. 5625/11332 cut-off events. For 987381/987381 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 103934 event pairs, 833 based on Foata normal form. 8/11340 useless extension candidates. Maximal degree in co-relation 171982. Up to 3527 conditions per place. [2023-01-28 09:32:24,417 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1284 selfloop transitions, 835 changer transitions 8/2127 dead transitions. [2023-01-28 09:32:24,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 2127 transitions, 83076 flow [2023-01-28 09:32:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 09:32:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 09:32:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5490 transitions. [2023-01-28 09:32:24,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164138349514563 [2023-01-28 09:32:24,421 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5490 transitions. [2023-01-28 09:32:24,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5490 transitions. [2023-01-28 09:32:24,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:32:24,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5490 transitions. [2023-01-28 09:32:24,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 171.5625) internal successors, (5490), 32 states have internal predecessors, (5490), 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 09:32:24,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 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 09:32:24,430 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 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 09:32:24,431 INFO L175 Difference]: Start difference. First operand has 648 places, 1982 transitions, 74899 flow. Second operand 32 states and 5490 transitions. [2023-01-28 09:32:24,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 2127 transitions, 83076 flow [2023-01-28 09:32:44,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 2127 transitions, 81458 flow, removed 723 selfloop flow, removed 10 redundant places. [2023-01-28 09:32:44,387 INFO L231 Difference]: Finished difference. Result has 676 places, 2029 transitions, 78721 flow [2023-01-28 09:32:44,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=73772, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=782, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=78721, PETRI_PLACES=676, PETRI_TRANSITIONS=2029} [2023-01-28 09:32:44,388 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 656 predicate places. [2023-01-28 09:32:44,388 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 2029 transitions, 78721 flow [2023-01-28 09:32:44,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 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 09:32:44,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:32:44,389 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:32:44,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-01-28 09:32:44,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:32:44,589 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:32:44,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:32:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash -265543753, now seen corresponding path program 62 times [2023-01-28 09:32:44,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:32:44,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350927021] [2023-01-28 09:32:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:32:44,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:32:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:32:44,659 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 09:32:44,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:32:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350927021] [2023-01-28 09:32:44,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350927021] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:32:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907798667] [2023-01-28 09:32:44,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:32:44,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:32:44,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:32:44,661 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:32:44,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-01-28 09:32:44,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:32:44,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:32:44,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:32:44,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:32:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:32:44,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:32:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 09:32:44,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907798667] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:32:44,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:32:44,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 15 [2023-01-28 09:32:44,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504880108] [2023-01-28 09:32:44,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:32:44,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:32:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:32:44,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:32:44,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:32:44,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:32:44,876 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 2029 transitions, 78721 flow. Second operand has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 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 09:32:44,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:32:44,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:32:44,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:32:54,382 INFO L130 PetriNetUnfolder]: 5655/11394 cut-off events. [2023-01-28 09:32:54,383 INFO L131 PetriNetUnfolder]: For 1054436/1054436 co-relation queries the response was YES. [2023-01-28 09:32:54,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176386 conditions, 11394 events. 5655/11394 cut-off events. For 1054436/1054436 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 104754 event pairs, 2166 based on Foata normal form. 62/11456 useless extension candidates. Maximal degree in co-relation 176160. Up to 10806 conditions per place. [2023-01-28 09:32:54,595 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1979 selfloop transitions, 118 changer transitions 2/2099 dead transitions. [2023-01-28 09:32:54,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 2099 transitions, 84431 flow [2023-01-28 09:32:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 09:32:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 09:32:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2771 transitions. [2023-01-28 09:32:54,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4203580097087379 [2023-01-28 09:32:54,597 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2771 transitions. [2023-01-28 09:32:54,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2771 transitions. [2023-01-28 09:32:54,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:32:54,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2771 transitions. [2023-01-28 09:32:54,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 173.1875) internal successors, (2771), 16 states have internal predecessors, (2771), 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 09:32:54,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 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 09:32:54,602 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 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 09:32:54,602 INFO L175 Difference]: Start difference. First operand has 676 places, 2029 transitions, 78721 flow. Second operand 16 states and 2771 transitions. [2023-01-28 09:32:54,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 2099 transitions, 84431 flow [2023-01-28 09:33:16,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 2099 transitions, 82952 flow, removed 499 selfloop flow, removed 16 redundant places. [2023-01-28 09:33:16,343 INFO L231 Difference]: Finished difference. Result has 678 places, 2036 transitions, 77993 flow [2023-01-28 09:33:16,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=77045, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=77993, PETRI_PLACES=678, PETRI_TRANSITIONS=2036} [2023-01-28 09:33:16,344 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 658 predicate places. [2023-01-28 09:33:16,344 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 2036 transitions, 77993 flow [2023-01-28 09:33:16,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 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 09:33:16,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:33:16,344 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:33:16,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-01-28 09:33:16,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-01-28 09:33:16,545 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:33:16,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:33:16,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1180036555, now seen corresponding path program 63 times [2023-01-28 09:33:16,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:33:16,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664450590] [2023-01-28 09:33:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:33:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:33:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:33:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:33:16,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:33:16,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664450590] [2023-01-28 09:33:16,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664450590] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:33:16,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084398968] [2023-01-28 09:33:16,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:33:16,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:33:16,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:33:16,606 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:33:16,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-01-28 09:33:16,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:33:16,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:33:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:33:16,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:33:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:33:16,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:33:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:33:16,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084398968] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:33:16,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:33:16,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-01-28 09:33:16,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134090856] [2023-01-28 09:33:16,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:33:16,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:33:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:33:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:33:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:33:16,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:33:16,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 2036 transitions, 77993 flow. Second operand has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 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 09:33:16,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:33:16,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:33:16,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:33:26,613 INFO L130 PetriNetUnfolder]: 5740/11503 cut-off events. [2023-01-28 09:33:26,613 INFO L131 PetriNetUnfolder]: For 1078291/1078291 co-relation queries the response was YES. [2023-01-28 09:33:26,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178113 conditions, 11503 events. 5740/11503 cut-off events. For 1078291/1078291 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 105191 event pairs, 511 based on Foata normal form. 86/11589 useless extension candidates. Maximal degree in co-relation 177882. Up to 9927 conditions per place. [2023-01-28 09:33:26,827 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1806 selfloop transitions, 360 changer transitions 2/2168 dead transitions. [2023-01-28 09:33:26,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 2168 transitions, 86315 flow [2023-01-28 09:33:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 09:33:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 09:33:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3617 transitions. [2023-01-28 09:33:26,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180536292186778 [2023-01-28 09:33:26,829 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3617 transitions. [2023-01-28 09:33:26,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3617 transitions. [2023-01-28 09:33:26,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:33:26,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3617 transitions. [2023-01-28 09:33:26,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 172.23809523809524) internal successors, (3617), 21 states have internal predecessors, (3617), 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 09:33:26,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 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 09:33:26,834 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 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 09:33:26,835 INFO L175 Difference]: Start difference. First operand has 678 places, 2036 transitions, 77993 flow. Second operand 21 states and 3617 transitions. [2023-01-28 09:33:26,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 2168 transitions, 86315 flow [2023-01-28 09:33:49,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 2168 transitions, 86022 flow, removed 93 selfloop flow, removed 5 redundant places. [2023-01-28 09:33:49,440 INFO L231 Difference]: Finished difference. Result has 699 places, 2087 transitions, 80552 flow [2023-01-28 09:33:49,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=77216, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=80552, PETRI_PLACES=699, PETRI_TRANSITIONS=2087} [2023-01-28 09:33:49,441 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 679 predicate places. [2023-01-28 09:33:49,441 INFO L495 AbstractCegarLoop]: Abstraction has has 699 places, 2087 transitions, 80552 flow [2023-01-28 09:33:49,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 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 09:33:49,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:33:49,442 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:33:49,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-01-28 09:33:49,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:33:49,642 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:33:49,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:33:49,643 INFO L85 PathProgramCache]: Analyzing trace with hash -458574299, now seen corresponding path program 64 times [2023-01-28 09:33:49,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:33:49,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107386515] [2023-01-28 09:33:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:33:49,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:33:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:33:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:33:49,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:33:49,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107386515] [2023-01-28 09:33:49,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107386515] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:33:49,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491762069] [2023-01-28 09:33:49,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:33:49,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:33:49,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:33:49,705 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:33:49,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-01-28 09:33:49,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:33:49,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:33:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:33:49,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:33:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:33:49,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:33:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:33:49,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491762069] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:33:49,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:33:49,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-28 09:33:49,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130552692] [2023-01-28 09:33:49,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:33:49,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 09:33:49,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:33:49,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 09:33:49,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-01-28 09:33:49,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:33:49,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 2087 transitions, 80552 flow. Second operand has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 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 09:33:49,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:33:49,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:33:49,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:33:59,995 INFO L130 PetriNetUnfolder]: 5736/11503 cut-off events. [2023-01-28 09:33:59,995 INFO L131 PetriNetUnfolder]: For 1065756/1065756 co-relation queries the response was YES. [2023-01-28 09:34:00,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179587 conditions, 11503 events. 5736/11503 cut-off events. For 1065756/1065756 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 105621 event pairs, 828 based on Foata normal form. 4/11507 useless extension candidates. Maximal degree in co-relation 179350. Up to 3646 conditions per place. [2023-01-28 09:34:00,224 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1267 selfloop transitions, 893 changer transitions 4/2164 dead transitions. [2023-01-28 09:34:00,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 2164 transitions, 86025 flow [2023-01-28 09:34:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 09:34:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 09:34:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4462 transitions. [2023-01-28 09:34:00,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165421956684093 [2023-01-28 09:34:00,228 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4462 transitions. [2023-01-28 09:34:00,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4462 transitions. [2023-01-28 09:34:00,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:34:00,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4462 transitions. [2023-01-28 09:34:00,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 171.6153846153846) internal successors, (4462), 26 states have internal predecessors, (4462), 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 09:34:00,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 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 09:34:00,235 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 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 09:34:00,235 INFO L175 Difference]: Start difference. First operand has 699 places, 2087 transitions, 80552 flow. Second operand 26 states and 4462 transitions. [2023-01-28 09:34:00,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 2164 transitions, 86025 flow [2023-01-28 09:34:23,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 2164 transitions, 85344 flow, removed 287 selfloop flow, removed 10 redundant places. [2023-01-28 09:34:23,878 INFO L231 Difference]: Finished difference. Result has 717 places, 2087 transitions, 81886 flow [2023-01-28 09:34:23,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=79851, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=81886, PETRI_PLACES=717, PETRI_TRANSITIONS=2087} [2023-01-28 09:34:23,879 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 697 predicate places. [2023-01-28 09:34:23,880 INFO L495 AbstractCegarLoop]: Abstraction has has 717 places, 2087 transitions, 81886 flow [2023-01-28 09:34:23,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 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 09:34:23,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:34:23,880 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:34:23,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-01-28 09:34:24,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:34:24,085 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:34:24,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:34:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash 546172837, now seen corresponding path program 65 times [2023-01-28 09:34:24,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:34:24,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165015327] [2023-01-28 09:34:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:34:24,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:34:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:34:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:34:24,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:34:24,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165015327] [2023-01-28 09:34:24,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165015327] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:34:24,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747039033] [2023-01-28 09:34:24,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:34:24,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:34:24,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:34:24,181 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:34:24,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-01-28 09:34:24,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:34:24,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:34:24,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:34:24,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:34:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:34:24,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:34:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:34:24,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747039033] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:34:24,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:34:24,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-01-28 09:34:24,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979806907] [2023-01-28 09:34:24,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:34:24,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:34:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:34:24,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:34:24,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:34:24,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:34:24,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 2087 transitions, 81886 flow. Second operand has 17 states, 17 states have (on average 168.76470588235293) internal successors, (2869), 17 states have internal predecessors, (2869), 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 09:34:24,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:34:24,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:34:24,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:34:35,197 INFO L130 PetriNetUnfolder]: 6210/12485 cut-off events. [2023-01-28 09:34:35,198 INFO L131 PetriNetUnfolder]: For 1273021/1273021 co-relation queries the response was YES. [2023-01-28 09:34:35,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199106 conditions, 12485 events. 6210/12485 cut-off events. For 1273021/1273021 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 116022 event pairs, 971 based on Foata normal form. 28/12513 useless extension candidates. Maximal degree in co-relation 198866. Up to 3941 conditions per place. [2023-01-28 09:34:35,451 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1474 selfloop transitions, 894 changer transitions 6/2374 dead transitions. [2023-01-28 09:34:35,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 2374 transitions, 95973 flow [2023-01-28 09:34:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 09:34:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 09:34:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4469 transitions. [2023-01-28 09:34:35,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41719566840926064 [2023-01-28 09:34:35,454 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4469 transitions. [2023-01-28 09:34:35,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4469 transitions. [2023-01-28 09:34:35,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:34:35,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4469 transitions. [2023-01-28 09:34:35,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 171.8846153846154) internal successors, (4469), 26 states have internal predecessors, (4469), 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 09:34:35,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 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 09:34:35,461 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 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 09:34:35,461 INFO L175 Difference]: Start difference. First operand has 717 places, 2087 transitions, 81886 flow. Second operand 26 states and 4469 transitions. [2023-01-28 09:34:35,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 2374 transitions, 95973 flow [2023-01-28 09:35:02,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 2374 transitions, 94145 flow, removed 146 selfloop flow, removed 14 redundant places. [2023-01-28 09:35:02,174 INFO L231 Difference]: Finished difference. Result has 737 places, 2251 transitions, 90446 flow [2023-01-28 09:35:02,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=79884, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=90446, PETRI_PLACES=737, PETRI_TRANSITIONS=2251} [2023-01-28 09:35:02,176 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 717 predicate places. [2023-01-28 09:35:02,176 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 2251 transitions, 90446 flow [2023-01-28 09:35:02,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.76470588235293) internal successors, (2869), 17 states have internal predecessors, (2869), 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 09:35:02,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:35:02,176 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:35:02,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-01-28 09:35:02,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:35:02,382 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:35:02,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:35:02,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1998320291, now seen corresponding path program 66 times [2023-01-28 09:35:02,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:35:02,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704470008] [2023-01-28 09:35:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:35:02,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:35:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:35:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:35:02,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:35:02,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704470008] [2023-01-28 09:35:02,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704470008] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:35:02,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903657659] [2023-01-28 09:35:02,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:35:02,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:35:02,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:35:02,457 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:35:02,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-01-28 09:35:02,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 09:35:02,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:35:02,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:35:02,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:35:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:35:02,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:35:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:35:02,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903657659] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:35:02,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:35:02,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-01-28 09:35:02,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258350205] [2023-01-28 09:35:02,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:35:02,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:35:02,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:35:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:35:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:35:02,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:35:02,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 2251 transitions, 90446 flow. Second operand has 17 states, 17 states have (on average 168.88235294117646) internal successors, (2871), 17 states have internal predecessors, (2871), 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 09:35:02,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:35:02,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:35:02,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:35:15,339 INFO L130 PetriNetUnfolder]: 6506/13103 cut-off events. [2023-01-28 09:35:15,340 INFO L131 PetriNetUnfolder]: For 1484422/1484422 co-relation queries the response was YES. [2023-01-28 09:35:15,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215101 conditions, 13103 events. 6506/13103 cut-off events. For 1484422/1484422 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 122184 event pairs, 285 based on Foata normal form. 68/13171 useless extension candidates. Maximal degree in co-relation 214852. Up to 7101 conditions per place. [2023-01-28 09:35:15,618 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1738 selfloop transitions, 753 changer transitions 6/2497 dead transitions. [2023-01-28 09:35:15,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 2497 transitions, 105089 flow [2023-01-28 09:35:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 09:35:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 09:35:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5485 transitions. [2023-01-28 09:35:15,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160345873786408 [2023-01-28 09:35:15,621 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5485 transitions. [2023-01-28 09:35:15,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5485 transitions. [2023-01-28 09:35:15,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:35:15,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5485 transitions. [2023-01-28 09:35:15,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 171.40625) internal successors, (5485), 32 states have internal predecessors, (5485), 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 09:35:15,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 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 09:35:15,630 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 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 09:35:15,630 INFO L175 Difference]: Start difference. First operand has 737 places, 2251 transitions, 90446 flow. Second operand 32 states and 5485 transitions. [2023-01-28 09:35:15,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 2497 transitions, 105089 flow [2023-01-28 09:35:48,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 2497 transitions, 102502 flow, removed 958 selfloop flow, removed 15 redundant places. [2023-01-28 09:35:48,585 INFO L231 Difference]: Finished difference. Result has 764 places, 2391 transitions, 96982 flow [2023-01-28 09:35:48,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=88453, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=614, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=96982, PETRI_PLACES=764, PETRI_TRANSITIONS=2391} [2023-01-28 09:35:48,587 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 744 predicate places. [2023-01-28 09:35:48,587 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 2391 transitions, 96982 flow [2023-01-28 09:35:48,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.88235294117646) internal successors, (2871), 17 states have internal predecessors, (2871), 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 09:35:48,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:35:48,588 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:35:48,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-01-28 09:35:48,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-01-28 09:35:48,794 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:35:48,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:35:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash 414514617, now seen corresponding path program 67 times [2023-01-28 09:35:48,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:35:48,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956753000] [2023-01-28 09:35:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:35:48,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:35:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:35:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:35:48,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:35:48,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956753000] [2023-01-28 09:35:48,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956753000] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:35:48,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871280469] [2023-01-28 09:35:48,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:35:48,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:35:48,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:35:48,871 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:35:48,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-01-28 09:35:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:35:49,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:35:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:35:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:35:49,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:35:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:35:49,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871280469] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:35:49,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:35:49,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-01-28 09:35:49,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865085277] [2023-01-28 09:35:49,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:35:49,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:35:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:35:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:35:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:35:49,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:35:49,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 2391 transitions, 96982 flow. Second operand has 17 states, 17 states have (on average 168.7058823529412) internal successors, (2868), 17 states have internal predecessors, (2868), 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 09:35:49,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:35:49,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:35:49,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:36:04,423 INFO L130 PetriNetUnfolder]: 7052/14173 cut-off events. [2023-01-28 09:36:04,423 INFO L131 PetriNetUnfolder]: For 1702508/1702508 co-relation queries the response was YES. [2023-01-28 09:36:04,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239137 conditions, 14173 events. 7052/14173 cut-off events. For 1702508/1702508 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 134216 event pairs, 517 based on Foata normal form. 110/14283 useless extension candidates. Maximal degree in co-relation 238878. Up to 9352 conditions per place. [2023-01-28 09:36:04,725 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1879 selfloop transitions, 866 changer transitions 0/2745 dead transitions. [2023-01-28 09:36:04,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 2745 transitions, 116600 flow [2023-01-28 09:36:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 09:36:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 09:36:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3795 transitions. [2023-01-28 09:36:04,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186893203883495 [2023-01-28 09:36:04,727 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3795 transitions. [2023-01-28 09:36:04,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3795 transitions. [2023-01-28 09:36:04,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:36:04,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3795 transitions. [2023-01-28 09:36:04,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 172.5) internal successors, (3795), 22 states have internal predecessors, (3795), 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 09:36:04,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 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 09:36:04,733 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 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 09:36:04,733 INFO L175 Difference]: Start difference. First operand has 764 places, 2391 transitions, 96982 flow. Second operand 22 states and 3795 transitions. [2023-01-28 09:36:04,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 2745 transitions, 116600 flow [2023-01-28 09:36:42,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 2745 transitions, 113324 flow, removed 1144 selfloop flow, removed 16 redundant places. [2023-01-28 09:36:42,512 INFO L231 Difference]: Finished difference. Result has 777 places, 2579 transitions, 105209 flow [2023-01-28 09:36:42,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=93622, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=105209, PETRI_PLACES=777, PETRI_TRANSITIONS=2579} [2023-01-28 09:36:42,514 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 757 predicate places. [2023-01-28 09:36:42,514 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 2579 transitions, 105209 flow [2023-01-28 09:36:42,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.7058823529412) internal successors, (2868), 17 states have internal predecessors, (2868), 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 09:36:42,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:36:42,515 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:36:42,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-01-28 09:36:42,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:36:42,720 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:36:42,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:36:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1977314083, now seen corresponding path program 68 times [2023-01-28 09:36:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:36:42,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893897395] [2023-01-28 09:36:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:36:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:36:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:36:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:36:42,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:36:42,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893897395] [2023-01-28 09:36:42,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893897395] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:36:42,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862146131] [2023-01-28 09:36:42,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:36:42,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:36:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:36:42,777 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:36:42,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-01-28 09:36:42,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:36:42,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:36:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:36:42,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:36:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:36:42,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:36:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:36:42,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862146131] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:36:42,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:36:42,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2023-01-28 09:36:42,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562814518] [2023-01-28 09:36:42,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:36:42,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 09:36:42,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:36:42,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 09:36:42,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-01-28 09:36:42,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:36:42,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 2579 transitions, 105209 flow. Second operand has 16 states, 16 states have (on average 168.9375) internal successors, (2703), 16 states have internal predecessors, (2703), 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 09:36:42,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:36:42,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:36:42,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:36:57,562 INFO L130 PetriNetUnfolder]: 6955/14036 cut-off events. [2023-01-28 09:36:57,562 INFO L131 PetriNetUnfolder]: For 1617603/1617603 co-relation queries the response was YES. [2023-01-28 09:36:57,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235552 conditions, 14036 events. 6955/14036 cut-off events. For 1617603/1617603 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 132966 event pairs, 269 based on Foata normal form. 92/14128 useless extension candidates. Maximal degree in co-relation 235286. Up to 6204 conditions per place. [2023-01-28 09:36:57,917 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1660 selfloop transitions, 1072 changer transitions 8/2740 dead transitions. [2023-01-28 09:36:57,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 2740 transitions, 116339 flow [2023-01-28 09:36:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 09:36:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 09:36:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5314 transitions. [2023-01-28 09:36:57,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160663952395866 [2023-01-28 09:36:57,920 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5314 transitions. [2023-01-28 09:36:57,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5314 transitions. [2023-01-28 09:36:57,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:36:57,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5314 transitions. [2023-01-28 09:36:57,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 171.41935483870967) internal successors, (5314), 31 states have internal predecessors, (5314), 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 09:36:57,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 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 09:36:57,928 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 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 09:36:57,928 INFO L175 Difference]: Start difference. First operand has 777 places, 2579 transitions, 105209 flow. Second operand 31 states and 5314 transitions. [2023-01-28 09:36:57,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 2740 transitions, 116339 flow [2023-01-28 09:37:37,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 2740 transitions, 113467 flow, removed 996 selfloop flow, removed 10 redundant places. [2023-01-28 09:37:37,091 INFO L231 Difference]: Finished difference. Result has 801 places, 2615 transitions, 107085 flow [2023-01-28 09:37:37,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=101248, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=107085, PETRI_PLACES=801, PETRI_TRANSITIONS=2615} [2023-01-28 09:37:37,093 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 781 predicate places. [2023-01-28 09:37:37,093 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 2615 transitions, 107085 flow [2023-01-28 09:37:37,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.9375) internal successors, (2703), 16 states have internal predecessors, (2703), 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 09:37:37,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:37:37,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:37:37,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-01-28 09:37:37,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:37:37,294 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:37:37,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:37:37,294 INFO L85 PathProgramCache]: Analyzing trace with hash -21418435, now seen corresponding path program 69 times [2023-01-28 09:37:37,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:37:37,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125498590] [2023-01-28 09:37:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:37:37,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:37:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:37:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:37:37,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:37:37,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125498590] [2023-01-28 09:37:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125498590] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:37:37,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885763915] [2023-01-28 09:37:37,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:37:37,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:37:37,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:37:37,356 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:37:37,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-01-28 09:37:37,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:37:37,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:37:37,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:37:37,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:37:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:37:37,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:37:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:37:37,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885763915] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:37:37,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:37:37,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-01-28 09:37:37,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174812535] [2023-01-28 09:37:37,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:37:37,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:37:37,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:37:37,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:37:37,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:37:37,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:37:37,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 2615 transitions, 107085 flow. Second operand has 17 states, 17 states have (on average 168.8235294117647) internal successors, (2870), 17 states have internal predecessors, (2870), 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 09:37:37,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:37:37,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:37:37,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:37:53,098 INFO L130 PetriNetUnfolder]: 6961/14034 cut-off events. [2023-01-28 09:37:53,099 INFO L131 PetriNetUnfolder]: For 1555819/1555819 co-relation queries the response was YES. [2023-01-28 09:37:53,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237742 conditions, 14034 events. 6961/14034 cut-off events. For 1555819/1555819 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 132831 event pairs, 281 based on Foata normal form. 28/14062 useless extension candidates. Maximal degree in co-relation 237476. Up to 6341 conditions per place. [2023-01-28 09:37:53,404 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1678 selfloop transitions, 1097 changer transitions 6/2781 dead transitions. [2023-01-28 09:37:53,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 833 places, 2781 transitions, 118427 flow [2023-01-28 09:37:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 09:37:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 09:37:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5828 transitions. [2023-01-28 09:37:53,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160479725870931 [2023-01-28 09:37:53,408 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5828 transitions. [2023-01-28 09:37:53,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5828 transitions. [2023-01-28 09:37:53,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:37:53,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5828 transitions. [2023-01-28 09:37:53,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 171.41176470588235) internal successors, (5828), 34 states have internal predecessors, (5828), 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 09:37:53,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 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 09:37:53,416 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 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 09:37:53,416 INFO L175 Difference]: Start difference. First operand has 801 places, 2615 transitions, 107085 flow. Second operand 34 states and 5828 transitions. [2023-01-28 09:37:53,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 833 places, 2781 transitions, 118427 flow [2023-01-28 09:38:31,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 816 places, 2781 transitions, 116318 flow, removed 922 selfloop flow, removed 17 redundant places. [2023-01-28 09:38:31,306 INFO L231 Difference]: Finished difference. Result has 826 places, 2655 transitions, 111299 flow [2023-01-28 09:38:31,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=105284, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=111299, PETRI_PLACES=826, PETRI_TRANSITIONS=2655} [2023-01-28 09:38:31,309 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 806 predicate places. [2023-01-28 09:38:31,309 INFO L495 AbstractCegarLoop]: Abstraction has has 826 places, 2655 transitions, 111299 flow [2023-01-28 09:38:31,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.8235294117647) internal successors, (2870), 17 states have internal predecessors, (2870), 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 09:38:31,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:38:31,309 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:38:31,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-01-28 09:38:31,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-01-28 09:38:31,515 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:38:31,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:38:31,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1244867451, now seen corresponding path program 70 times [2023-01-28 09:38:31,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:38:31,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526086941] [2023-01-28 09:38:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:38:31,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:38:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:38:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:38:31,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:38:31,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526086941] [2023-01-28 09:38:31,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526086941] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:38:31,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098923820] [2023-01-28 09:38:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:38:31,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:38:31,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:38:31,598 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:38:31,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-01-28 09:38:31,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:38:31,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:38:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:38:31,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:38:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:38:31,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:38:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:38:31,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098923820] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:38:31,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:38:31,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-01-28 09:38:31,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434579107] [2023-01-28 09:38:31,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:38:31,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:38:31,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:38:31,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:38:31,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:38:31,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:38:31,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 2655 transitions, 111299 flow. Second operand has 17 states, 17 states have (on average 168.94117647058823) internal successors, (2872), 17 states have internal predecessors, (2872), 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 09:38:31,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:38:31,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:38:31,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:38:47,917 INFO L130 PetriNetUnfolder]: 7009/14176 cut-off events. [2023-01-28 09:38:47,917 INFO L131 PetriNetUnfolder]: For 1569885/1569885 co-relation queries the response was YES. [2023-01-28 09:38:48,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240940 conditions, 14176 events. 7009/14176 cut-off events. For 1569885/1569885 co-relation queries the response was YES. Maximal size of possible extension queue 1304. Compared 135145 event pairs, 2289 based on Foata normal form. 64/14240 useless extension candidates. Maximal degree in co-relation 240666. Up to 11093 conditions per place. [2023-01-28 09:38:48,246 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 2339 selfloop transitions, 459 changer transitions 0/2798 dead transitions. [2023-01-28 09:38:48,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 2798 transitions, 121645 flow [2023-01-28 09:38:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 09:38:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 09:38:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3456 transitions. [2023-01-28 09:38:48,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41941747572815535 [2023-01-28 09:38:48,248 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3456 transitions. [2023-01-28 09:38:48,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3456 transitions. [2023-01-28 09:38:48,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:38:48,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3456 transitions. [2023-01-28 09:38:48,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 172.8) internal successors, (3456), 20 states have internal predecessors, (3456), 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 09:38:48,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 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 09:38:48,253 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 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 09:38:48,253 INFO L175 Difference]: Start difference. First operand has 826 places, 2655 transitions, 111299 flow. Second operand 20 states and 3456 transitions. [2023-01-28 09:38:48,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 2798 transitions, 121645 flow [2023-01-28 09:39:26,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 2798 transitions, 120350 flow, removed 436 selfloop flow, removed 19 redundant places. [2023-01-28 09:39:26,978 INFO L231 Difference]: Finished difference. Result has 829 places, 2676 transitions, 112655 flow [2023-01-28 09:39:26,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=109616, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=112655, PETRI_PLACES=829, PETRI_TRANSITIONS=2676} [2023-01-28 09:39:26,980 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 809 predicate places. [2023-01-28 09:39:26,980 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2676 transitions, 112655 flow [2023-01-28 09:39:26,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.94117647058823) internal successors, (2872), 17 states have internal predecessors, (2872), 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 09:39:26,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:39:26,980 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:39:26,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-01-28 09:39:27,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:39:27,181 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:39:27,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:39:27,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1560994467, now seen corresponding path program 71 times [2023-01-28 09:39:27,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:39:27,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99335208] [2023-01-28 09:39:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:39:27,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:39:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:39:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:39:27,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:39:27,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99335208] [2023-01-28 09:39:27,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99335208] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:39:27,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600257744] [2023-01-28 09:39:27,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:39:27,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:39:27,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:39:27,246 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:39:27,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-01-28 09:39:27,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:39:27,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:39:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:39:27,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:39:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:39:27,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:39:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:39:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600257744] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:39:27,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:39:27,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-01-28 09:39:27,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285035365] [2023-01-28 09:39:27,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:39:27,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:39:27,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:39:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:39:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:39:27,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:39:27,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2676 transitions, 112655 flow. Second operand has 17 states, 17 states have (on average 168.88235294117646) internal successors, (2871), 17 states have internal predecessors, (2871), 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 09:39:27,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:39:27,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:39:27,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:39:46,105 INFO L130 PetriNetUnfolder]: 7967/16156 cut-off events. [2023-01-28 09:39:46,105 INFO L131 PetriNetUnfolder]: For 1898636/1898636 co-relation queries the response was YES. [2023-01-28 09:39:46,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278656 conditions, 16156 events. 7967/16156 cut-off events. For 1898636/1898636 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 157258 event pairs, 239 based on Foata normal form. 48/16204 useless extension candidates. Maximal degree in co-relation 278382. Up to 5941 conditions per place. [2023-01-28 09:39:46,598 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1793 selfloop transitions, 1383 changer transitions 3/3179 dead transitions. [2023-01-28 09:39:46,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 3179 transitions, 139852 flow [2023-01-28 09:39:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 09:39:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 09:39:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6193 transitions. [2023-01-28 09:39:46,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41754314994606256 [2023-01-28 09:39:46,603 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6193 transitions. [2023-01-28 09:39:46,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6193 transitions. [2023-01-28 09:39:46,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:39:46,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6193 transitions. [2023-01-28 09:39:46,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 172.02777777777777) internal successors, (6193), 36 states have internal predecessors, (6193), 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 09:39:46,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 412.0) internal successors, (15244), 37 states have internal predecessors, (15244), 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 09:39:46,617 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 412.0) internal successors, (15244), 37 states have internal predecessors, (15244), 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 09:39:46,617 INFO L175 Difference]: Start difference. First operand has 829 places, 2676 transitions, 112655 flow. Second operand 36 states and 6193 transitions. [2023-01-28 09:39:46,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 3179 transitions, 139852 flow [2023-01-28 09:40:34,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 3179 transitions, 138546 flow, removed 359 selfloop flow, removed 9 redundant places. [2023-01-28 09:40:34,156 INFO L231 Difference]: Finished difference. Result has 864 places, 2968 transitions, 130690 flow [2023-01-28 09:40:34,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=111497, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=130690, PETRI_PLACES=864, PETRI_TRANSITIONS=2968} [2023-01-28 09:40:34,158 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 844 predicate places. [2023-01-28 09:40:34,158 INFO L495 AbstractCegarLoop]: Abstraction has has 864 places, 2968 transitions, 130690 flow [2023-01-28 09:40:34,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.88235294117646) internal successors, (2871), 17 states have internal predecessors, (2871), 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 09:40:34,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:40:34,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:40:34,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-01-28 09:40:34,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:40:34,359 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:40:34,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:40:34,359 INFO L85 PathProgramCache]: Analyzing trace with hash -42424643, now seen corresponding path program 72 times [2023-01-28 09:40:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:40:34,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481686141] [2023-01-28 09:40:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:40:34,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:40:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:40:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:40:34,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:40:34,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481686141] [2023-01-28 09:40:34,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481686141] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:40:34,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777431708] [2023-01-28 09:40:34,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:40:34,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:40:34,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:40:34,421 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:40:34,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-01-28 09:40:34,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 09:40:34,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:40:34,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 09:40:34,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:40:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:40:34,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:40:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:40:34,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777431708] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:40:34,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:40:34,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-01-28 09:40:34,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082199978] [2023-01-28 09:40:34,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:40:34,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 09:40:34,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:40:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 09:40:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-01-28 09:40:34,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-01-28 09:40:34,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 2968 transitions, 130690 flow. Second operand has 18 states, 18 states have (on average 168.77777777777777) internal successors, (3038), 18 states have internal predecessors, (3038), 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 09:40:34,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:40:34,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-01-28 09:40:34,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:40:56,963 INFO L130 PetriNetUnfolder]: 8219/16682 cut-off events. [2023-01-28 09:40:56,964 INFO L131 PetriNetUnfolder]: For 2105296/2105296 co-relation queries the response was YES. [2023-01-28 09:40:57,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297067 conditions, 16682 events. 8219/16682 cut-off events. For 2105296/2105296 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 163395 event pairs, 245 based on Foata normal form. 36/16718 useless extension candidates. Maximal degree in co-relation 296784. Up to 6338 conditions per place. [2023-01-28 09:40:57,360 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1753 selfloop transitions, 1497 changer transitions 5/3255 dead transitions. [2023-01-28 09:40:57,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 897 places, 3255 transitions, 148349 flow [2023-01-28 09:40:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 09:40:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 09:40:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6028 transitions. [2023-01-28 09:40:57,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41803051317614426 [2023-01-28 09:40:57,364 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6028 transitions. [2023-01-28 09:40:57,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6028 transitions. [2023-01-28 09:40:57,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:40:57,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6028 transitions. [2023-01-28 09:40:57,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 172.22857142857143) internal successors, (6028), 35 states have internal predecessors, (6028), 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 09:40:57,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 412.0) internal successors, (14832), 36 states have internal predecessors, (14832), 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 09:40:57,373 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 412.0) internal successors, (14832), 36 states have internal predecessors, (14832), 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 09:40:57,373 INFO L175 Difference]: Start difference. First operand has 864 places, 2968 transitions, 130690 flow. Second operand 35 states and 6028 transitions. [2023-01-28 09:40:57,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 897 places, 3255 transitions, 148349 flow Received shutdown request... [2023-01-28 09:41:09,737 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 09:41:09,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-01-28 09:41:09,776 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:41:09,776 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:41:09,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:41:09,938 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-28 09:41:09,939 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 09:41:09,939 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 09:41:09,939 INFO L445 BasicCegarLoop]: Path program histogram: [72, 5, 4, 2] [2023-01-28 09:41:09,941 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 09:41:09,941 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 09:41:09,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 09:41:09 BasicIcfg [2023-01-28 09:41:09,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 09:41:09,944 INFO L158 Benchmark]: Toolchain (without parser) took 816188.33ms. Allocated memory was 346.0MB in the beginning and 7.7GB in the end (delta: 7.4GB). Free memory was 292.1MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. [2023-01-28 09:41:09,944 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 09:41:09,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.43ms. Allocated memory is still 346.0MB. Free memory was 291.9MB in the beginning and 325.0MB in the end (delta: -33.1MB). Peak memory consumption was 17.8MB. Max. memory is 16.0GB. [2023-01-28 09:41:09,944 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.79ms. Allocated memory is still 346.0MB. Free memory was 325.0MB in the beginning and 323.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 09:41:09,944 INFO L158 Benchmark]: Boogie Preprocessor took 21.16ms. Allocated memory is still 346.0MB. Free memory was 323.2MB in the beginning and 321.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 09:41:09,944 INFO L158 Benchmark]: RCFGBuilder took 430.88ms. Allocated memory is still 346.0MB. Free memory was 321.1MB in the beginning and 303.7MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-01-28 09:41:09,945 INFO L158 Benchmark]: TraceAbstraction took 815484.53ms. Allocated memory was 346.0MB in the beginning and 7.7GB in the end (delta: 7.4GB). Free memory was 303.2MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. [2023-01-28 09:41:09,945 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 214.43ms. Allocated memory is still 346.0MB. Free memory was 291.9MB in the beginning and 325.0MB in the end (delta: -33.1MB). Peak memory consumption was 17.8MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.79ms. Allocated memory is still 346.0MB. Free memory was 325.0MB in the beginning and 323.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.16ms. Allocated memory is still 346.0MB. Free memory was 323.2MB in the beginning and 321.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 430.88ms. Allocated memory is still 346.0MB. Free memory was 321.1MB in the beginning and 303.7MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 815484.53ms. Allocated memory was 346.0MB in the beginning and 7.7GB in the end (delta: 7.4GB). Free memory was 303.2MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.3s, 179 PlacesBefore, 20 PlacesAfterwards, 186 TransitionsBefore, 15 TransitionsAfterwards, 7452 CoEnabledTransitionPairs, 8 FixpointIterations, 65 TrivialSequentialCompositions, 99 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 35 ConcurrentYvCompositions, 12 ChoiceCompositions, 216 TotalNumberOfCompositions, 6342 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6342, independent: 6342, independent conditional: 0, independent unconditional: 6342, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4246, independent: 4246, independent conditional: 0, independent unconditional: 4246, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6342, independent: 2096, independent conditional: 0, independent unconditional: 2096, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 4246, unknown conditional: 0, unknown unconditional: 4246] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 283 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: 815.3s, OverallIterations: 83, TraceHistogramMax: 3, PathProgramHistogramMax: 72, EmptinessCheckTime: 0.0s, AutomataDifference: 762.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6252 SdHoareTripleChecker+Valid, 12.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6252 mSDsluCounter, 705 SdHoareTripleChecker+Invalid, 10.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 460 mSDsCounter, 729 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26586 IncrementalHoareTripleChecker+Invalid, 27315 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 729 mSolverCounterUnsat, 245 mSDtfsCounter, 26586 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4354 GetRequests, 2366 SyntacticMatches, 274 SemanticMatches, 1714 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11842 ImplicationChecksByTransitivity, 13.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130690occurred in iteration=82, InterpolantAutomatonStates: 1276, 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: 1.0s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 22.2s InterpolantComputationTime, 2668 NumberOfCodeBlocks, 2668 NumberOfCodeBlocksAsserted, 256 NumberOfCheckSat, 3729 ConstructedInterpolants, 0 QuantifiedInterpolants, 21643 SizeOfPredicates, 703 NumberOfNonLiveVariables, 19448 ConjunctsInSsa, 1824 ConjunctsInUnsatCore, 239 InterpolantComputations, 5 PerfectInterpolantSequences, 489/1353 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 could not prove your program: Timeout Completed graceful shutdown