/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 22:15:00,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 22:15:00,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 22:15:00,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 22:15:00,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 22:15:00,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 22:15:00,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 22:15:00,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 22:15:00,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 22:15:00,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 22:15:00,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 22:15:00,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 22:15:00,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 22:15:00,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 22:15:00,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 22:15:00,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 22:15:00,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 22:15:00,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 22:15:00,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 22:15:00,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 22:15:00,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 22:15:00,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 22:15:00,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 22:15:00,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 22:15:00,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 22:15:00,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 22:15:00,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 22:15:00,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 22:15:00,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 22:15:00,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 22:15:00,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 22:15:00,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 22:15:00,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 22:15:00,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 22:15:00,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 22:15:00,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 22:15:00,106 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 [2023-01-27 22:15:00,120 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 22:15:00,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 22:15:00,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 22:15:00,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 22:15:00,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 22:15:00,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 22:15:00,121 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 22:15:00,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 22:15:00,121 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 22:15:00,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 22:15:00,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 22:15:00,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 22:15:00,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 22:15:00,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 22:15:00,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 22:15:00,122 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 22:15:00,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 22:15:00,122 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 22:15:00,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 22:15:00,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 22:15:00,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 22:15:00,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 22:15:00,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 22:15:00,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:15:00,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 22:15:00,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 22:15:00,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 22:15:00,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 22:15:00,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 22:15:00,123 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 22:15:00,123 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 22:15:00,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 22:15:00,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 22:15:00,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 22:15:00,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 22:15:00,305 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 22:15:00,306 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 22:15:00,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-01-27 22:15:01,329 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 22:15:01,479 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 22:15:01,479 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-01-27 22:15:01,485 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ac985b7/3ba0fc54e4754628aea6579d598ad0da/FLAGdb15de137 [2023-01-27 22:15:01,904 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ac985b7/3ba0fc54e4754628aea6579d598ad0da [2023-01-27 22:15:01,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 22:15:01,907 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 22:15:01,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 22:15:01,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 22:15:01,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 22:15:01,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:15:01" (1/1) ... [2023-01-27 22:15:01,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfcabde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:01, skipping insertion in model container [2023-01-27 22:15:01,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 10:15:01" (1/1) ... [2023-01-27 22:15:01,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 22:15:01,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 22:15:02,019 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/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-01-27 22:15:02,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:15:02,028 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 22:15:02,039 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/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-01-27 22:15:02,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 22:15:02,045 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:15:02,045 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 22:15:02,050 INFO L208 MainTranslator]: Completed translation [2023-01-27 22:15:02,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02 WrapperNode [2023-01-27 22:15:02,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 22:15:02,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 22:15:02,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 22:15:02,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 22:15:02,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,070 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-01-27 22:15:02,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 22:15:02,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 22:15:02,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 22:15:02,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 22:15:02,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,084 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 22:15:02,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 22:15:02,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 22:15:02,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 22:15:02,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (1/1) ... [2023-01-27 22:15:02,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 22:15:02,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:02,107 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) [2023-01-27 22:15:02,121 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 [2023-01-27 22:15:02,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 22:15:02,133 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 22:15:02,133 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 22:15:02,133 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 22:15:02,133 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 22:15:02,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 22:15:02,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 22:15:02,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 22:15:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 22:15:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 22:15:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 22:15:02,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 22:15:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 22:15:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 22:15:02,135 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 22:15:02,207 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 22:15:02,209 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 22:15:02,317 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 22:15:02,345 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 22:15:02,345 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 22:15:02,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:15:02 BoogieIcfgContainer [2023-01-27 22:15:02,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 22:15:02,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 22:15:02,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 22:15:02,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 22:15:02,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 10:15:01" (1/3) ... [2023-01-27 22:15:02,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7c80e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:15:02, skipping insertion in model container [2023-01-27 22:15:02,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 10:15:02" (2/3) ... [2023-01-27 22:15:02,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7c80e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 10:15:02, skipping insertion in model container [2023-01-27 22:15:02,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 10:15:02" (3/3) ... [2023-01-27 22:15:02,367 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-01-27 22:15:02,378 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 22:15:02,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 22:15:02,378 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 22:15:02,449 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 22:15:02,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 174 flow [2023-01-27 22:15:02,531 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2023-01-27 22:15:02,532 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:15:02,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 6/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-01-27 22:15:02,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 79 transitions, 174 flow [2023-01-27 22:15:02,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 69 transitions, 150 flow [2023-01-27 22:15:02,541 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 22:15:02,555 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 69 transitions, 150 flow [2023-01-27 22:15:02,557 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 69 transitions, 150 flow [2023-01-27 22:15:02,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 69 transitions, 150 flow [2023-01-27 22:15:02,584 INFO L130 PetriNetUnfolder]: 6/69 cut-off events. [2023-01-27 22:15:02,584 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:15:02,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 6/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-01-27 22:15:02,586 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-01-27 22:15:04,300 INFO L134 LiptonReduction]: Checked pairs total: 443 [2023-01-27 22:15:04,300 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-01-27 22:15:04,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 22:15:04,314 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;@41986acb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 22:15:04,314 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 22:15:04,320 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-27 22:15:04,320 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 22:15:04,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:04,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:04,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:04,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:04,324 INFO L85 PathProgramCache]: Analyzing trace with hash 715998182, now seen corresponding path program 1 times [2023-01-27 22:15:04,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:04,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110684664] [2023-01-27 22:15:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:04,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:04,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:04,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110684664] [2023-01-27 22:15:04,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110684664] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:15:04,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:15:04,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 22:15:04,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096201926] [2023-01-27 22:15:04,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:15:04,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 22:15:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 22:15:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 22:15:04,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 142 [2023-01-27 22:15:04,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:04,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:04,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 142 [2023-01-27 22:15:04,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:04,691 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-01-27 22:15:04,691 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-01-27 22:15:04,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 240 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-01-27 22:15:04,694 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-01-27 22:15:04,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-01-27 22:15:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:15:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:15:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-01-27 22:15:04,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4665492957746479 [2023-01-27 22:15:04,710 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-01-27 22:15:04,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-01-27 22:15:04,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:04,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-01-27 22:15:04,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:04,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:04,724 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:04,725 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 265 transitions. [2023-01-27 22:15:04,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-01-27 22:15:04,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 22:15:04,728 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-01-27 22:15:04,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, 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=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-01-27 22:15:04,732 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-01-27 22:15:04,732 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-01-27 22:15:04,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:04,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:04,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:04,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 22:15:04,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:04,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:04,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1517791802, now seen corresponding path program 1 times [2023-01-27 22:15:04,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:04,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780067818] [2023-01-27 22:15:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:04,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:04,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:04,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780067818] [2023-01-27 22:15:04,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780067818] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:15:04,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 22:15:04,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 22:15:04,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143501742] [2023-01-27 22:15:04,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:15:04,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 22:15:04,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:04,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 22:15:04,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 22:15:04,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-01-27 22:15:04,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:04,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:04,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-01-27 22:15:04,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:04,942 INFO L130 PetriNetUnfolder]: 60/119 cut-off events. [2023-01-27 22:15:04,942 INFO L131 PetriNetUnfolder]: For 22/30 co-relation queries the response was YES. [2023-01-27 22:15:04,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 119 events. 60/119 cut-off events. For 22/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 345 event pairs, 16 based on Foata normal form. 12/102 useless extension candidates. Maximal degree in co-relation 97. Up to 74 conditions per place. [2023-01-27 22:15:04,944 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 26 selfloop transitions, 3 changer transitions 2/32 dead transitions. [2023-01-27 22:15:04,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 155 flow [2023-01-27 22:15:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:15:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:15:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 266 transitions. [2023-01-27 22:15:04,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46830985915492956 [2023-01-27 22:15:04,946 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 266 transitions. [2023-01-27 22:15:04,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 266 transitions. [2023-01-27 22:15:04,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:04,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 266 transitions. [2023-01-27 22:15:04,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:04,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:04,951 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:04,951 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 266 transitions. [2023-01-27 22:15:04,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 155 flow [2023-01-27 22:15:04,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 32 transitions, 146 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-27 22:15:04,953 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 64 flow [2023-01-27 22:15:04,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2023-01-27 22:15:04,954 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-01-27 22:15:04,954 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 64 flow [2023-01-27 22:15:04,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:04,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:04,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:04,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 22:15:04,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:04,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1749521210, now seen corresponding path program 2 times [2023-01-27 22:15:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:04,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945496911] [2023-01-27 22:15:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:04,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:05,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:05,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945496911] [2023-01-27 22:15:05,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945496911] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:05,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142775669] [2023-01-27 22:15:05,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:15:05,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:05,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:05,144 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) [2023-01-27 22:15:05,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 22:15:05,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 22:15:05,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:15:05,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 22:15:05,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:15:05,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 22:15:05,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142775669] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:15:05,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 22:15:05,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-01-27 22:15:05,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865107467] [2023-01-27 22:15:05,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:15:05,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 22:15:05,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 22:15:05,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-27 22:15:05,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-01-27 22:15:05,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:05,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:05,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-01-27 22:15:05,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:05,335 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-01-27 22:15:05,335 INFO L131 PetriNetUnfolder]: For 72/80 co-relation queries the response was YES. [2023-01-27 22:15:05,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 94 events. 51/94 cut-off events. For 72/80 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 227 event pairs, 24 based on Foata normal form. 16/99 useless extension candidates. Maximal degree in co-relation 148. Up to 73 conditions per place. [2023-01-27 22:15:05,336 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-01-27 22:15:05,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 123 flow [2023-01-27 22:15:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:15:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:15:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 257 transitions. [2023-01-27 22:15:05,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524647887323944 [2023-01-27 22:15:05,337 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 257 transitions. [2023-01-27 22:15:05,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 257 transitions. [2023-01-27 22:15:05,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:05,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 257 transitions. [2023-01-27 22:15:05,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:05,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:05,339 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:05,339 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 64 flow. Second operand 4 states and 257 transitions. [2023-01-27 22:15:05,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 123 flow [2023-01-27 22:15:05,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-01-27 22:15:05,340 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-01-27 22:15:05,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-01-27 22:15:05,341 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-01-27 22:15:05,341 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-01-27 22:15:05,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:05,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:05,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:05,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 22:15:05,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:05,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:05,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1434294769, now seen corresponding path program 1 times [2023-01-27 22:15:05,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:05,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848318590] [2023-01-27 22:15:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:05,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:05,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848318590] [2023-01-27 22:15:05,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848318590] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997937016] [2023-01-27 22:15:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:05,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:05,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:05,836 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) [2023-01-27 22:15:05,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 22:15:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:05,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 22:15:05,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:05,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997937016] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:06,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 22:15:06,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 10 [2023-01-27 22:15:06,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984158611] [2023-01-27 22:15:06,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:15:06,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 22:15:06,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 22:15:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-01-27 22:15:06,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-01-27 22:15:06,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:06,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:06,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-01-27 22:15:06,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:06,191 INFO L130 PetriNetUnfolder]: 95/175 cut-off events. [2023-01-27 22:15:06,191 INFO L131 PetriNetUnfolder]: For 50/61 co-relation queries the response was YES. [2023-01-27 22:15:06,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 175 events. 95/175 cut-off events. For 50/61 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 560 event pairs, 15 based on Foata normal form. 12/143 useless extension candidates. Maximal degree in co-relation 144. Up to 69 conditions per place. [2023-01-27 22:15:06,194 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-01-27 22:15:06,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 202 flow [2023-01-27 22:15:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 22:15:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 22:15:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 272 transitions. [2023-01-27 22:15:06,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4788732394366197 [2023-01-27 22:15:06,195 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 272 transitions. [2023-01-27 22:15:06,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 272 transitions. [2023-01-27 22:15:06,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:06,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 272 transitions. [2023-01-27 22:15:06,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:06,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:06,197 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:06,197 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 272 transitions. [2023-01-27 22:15:06,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 202 flow [2023-01-27 22:15:06,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 22:15:06,199 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-01-27 22:15:06,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-01-27 22:15:06,200 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-27 22:15:06,200 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-01-27 22:15:06,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:06,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:06,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:06,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 22:15:06,405 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,SelfDestructingSolverStorable3 [2023-01-27 22:15:06,405 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:06,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:06,406 INFO L85 PathProgramCache]: Analyzing trace with hash -539686553, now seen corresponding path program 2 times [2023-01-27 22:15:06,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:06,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864857288] [2023-01-27 22:15:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:06,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:15:06,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:06,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864857288] [2023-01-27 22:15:06,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864857288] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:06,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013563964] [2023-01-27 22:15:06,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:15:06,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:06,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:06,480 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) [2023-01-27 22:15:06,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 22:15:06,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:15:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:15:06,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:15:06,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:15:06,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:06,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013563964] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:15:06,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:15:06,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 12 [2023-01-27 22:15:06,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008376455] [2023-01-27 22:15:06,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:15:06,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 22:15:06,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 22:15:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-01-27 22:15:06,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-27 22:15:06,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 57.46153846153846) internal successors, (747), 13 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:06,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:06,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-27 22:15:06,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:07,194 INFO L130 PetriNetUnfolder]: 175/307 cut-off events. [2023-01-27 22:15:07,194 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2023-01-27 22:15:07,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 307 events. 175/307 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1043 event pairs, 10 based on Foata normal form. 22/329 useless extension candidates. Maximal degree in co-relation 316. Up to 131 conditions per place. [2023-01-27 22:15:07,196 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 47 selfloop transitions, 32 changer transitions 4/83 dead transitions. [2023-01-27 22:15:07,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 83 transitions, 526 flow [2023-01-27 22:15:07,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 22:15:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 22:15:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 894 transitions. [2023-01-27 22:15:07,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-01-27 22:15:07,198 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 894 transitions. [2023-01-27 22:15:07,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 894 transitions. [2023-01-27 22:15:07,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:07,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 894 transitions. [2023-01-27 22:15:07,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 59.6) internal successors, (894), 15 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:07,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 142.0) internal successors, (2272), 16 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:07,202 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 142.0) internal successors, (2272), 16 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:07,202 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 15 states and 894 transitions. [2023-01-27 22:15:07,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 83 transitions, 526 flow [2023-01-27 22:15:07,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 22:15:07,204 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 364 flow [2023-01-27 22:15:07,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=364, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-01-27 22:15:07,205 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-01-27 22:15:07,205 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 364 flow [2023-01-27 22:15:07,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 57.46153846153846) internal successors, (747), 13 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:07,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:07,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:07,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 22:15:07,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:07,411 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:07,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:07,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1477368276, now seen corresponding path program 3 times [2023-01-27 22:15:07,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:07,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250506882] [2023-01-27 22:15:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:07,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:07,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250506882] [2023-01-27 22:15:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250506882] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572868381] [2023-01-27 22:15:07,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:15:07,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:07,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:07,594 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) [2023-01-27 22:15:07,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 22:15:07,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 22:15:07,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:15:07,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 22:15:07,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:07,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:07,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572868381] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:15:07,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:15:07,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-27 22:15:07,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161754103] [2023-01-27 22:15:07,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:15:07,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 22:15:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 22:15:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-01-27 22:15:07,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-27 22:15:07,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 364 flow. Second operand has 14 states, 14 states have (on average 57.285714285714285) internal successors, (802), 14 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:07,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:07,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-27 22:15:07,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:08,418 INFO L130 PetriNetUnfolder]: 313/565 cut-off events. [2023-01-27 22:15:08,418 INFO L131 PetriNetUnfolder]: For 2250/2250 co-relation queries the response was YES. [2023-01-27 22:15:08,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 565 events. 313/565 cut-off events. For 2250/2250 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2400 event pairs, 13 based on Foata normal form. 22/587 useless extension candidates. Maximal degree in co-relation 2022. Up to 183 conditions per place. [2023-01-27 22:15:08,421 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 93 selfloop transitions, 47 changer transitions 13/153 dead transitions. [2023-01-27 22:15:08,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 153 transitions, 1332 flow [2023-01-27 22:15:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 22:15:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 22:15:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 980 transitions. [2023-01-27 22:15:08,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43133802816901406 [2023-01-27 22:15:08,424 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 980 transitions. [2023-01-27 22:15:08,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 980 transitions. [2023-01-27 22:15:08,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:08,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 980 transitions. [2023-01-27 22:15:08,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 61.25) internal successors, (980), 16 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:08,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:08,429 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:08,429 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 364 flow. Second operand 16 states and 980 transitions. [2023-01-27 22:15:08,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 153 transitions, 1332 flow [2023-01-27 22:15:08,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 153 transitions, 1273 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-01-27 22:15:08,437 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 741 flow [2023-01-27 22:15:08,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=741, PETRI_PLACES=63, PETRI_TRANSITIONS=77} [2023-01-27 22:15:08,439 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-01-27 22:15:08,439 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 741 flow [2023-01-27 22:15:08,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 57.285714285714285) internal successors, (802), 14 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:08,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:08,439 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:08,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-27 22:15:08,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:08,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:08,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:08,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2047268056, now seen corresponding path program 4 times [2023-01-27 22:15:08,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:08,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193641772] [2023-01-27 22:15:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:08,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:08,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:08,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193641772] [2023-01-27 22:15:08,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193641772] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:08,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27916782] [2023-01-27 22:15:08,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:15:08,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:08,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:08,833 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) [2023-01-27 22:15:08,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 22:15:08,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:15:08,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:15:08,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 22:15:08,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:08,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:09,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27916782] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:15:09,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:15:09,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-27 22:15:09,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253862575] [2023-01-27 22:15:09,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:15:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 22:15:09,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:09,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 22:15:09,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-01-27 22:15:09,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-27 22:15:09,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 741 flow. Second operand has 16 states, 16 states have (on average 57.125) internal successors, (914), 16 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:09,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:09,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-27 22:15:09,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:09,623 INFO L130 PetriNetUnfolder]: 372/680 cut-off events. [2023-01-27 22:15:09,623 INFO L131 PetriNetUnfolder]: For 6308/6308 co-relation queries the response was YES. [2023-01-27 22:15:09,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 680 events. 372/680 cut-off events. For 6308/6308 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3114 event pairs, 24 based on Foata normal form. 38/718 useless extension candidates. Maximal degree in co-relation 3026. Up to 239 conditions per place. [2023-01-27 22:15:09,628 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 118 selfloop transitions, 54 changer transitions 11/183 dead transitions. [2023-01-27 22:15:09,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 183 transitions, 1855 flow [2023-01-27 22:15:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 22:15:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 22:15:09,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1169 transitions. [2023-01-27 22:15:09,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332839140103781 [2023-01-27 22:15:09,631 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1169 transitions. [2023-01-27 22:15:09,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1169 transitions. [2023-01-27 22:15:09,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:09,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1169 transitions. [2023-01-27 22:15:09,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.526315789473685) internal successors, (1169), 19 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:09,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:09,636 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:09,636 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 741 flow. Second operand 19 states and 1169 transitions. [2023-01-27 22:15:09,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 183 transitions, 1855 flow [2023-01-27 22:15:09,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 183 transitions, 1690 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-01-27 22:15:09,652 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 1127 flow [2023-01-27 22:15:09,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1127, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2023-01-27 22:15:09,653 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-01-27 22:15:09,654 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 1127 flow [2023-01-27 22:15:09,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.125) internal successors, (914), 16 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:09,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:09,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:09,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-27 22:15:09,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:09,863 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:09,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:09,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1082077996, now seen corresponding path program 5 times [2023-01-27 22:15:09,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:09,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335251201] [2023-01-27 22:15:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:09,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:10,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:10,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335251201] [2023-01-27 22:15:10,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335251201] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:10,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364650642] [2023-01-27 22:15:10,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:15:10,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:10,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:10,072 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) [2023-01-27 22:15:10,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 22:15:10,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:15:10,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:15:10,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:15:10,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:10,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:10,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364650642] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:15:10,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:15:10,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-27 22:15:10,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820014696] [2023-01-27 22:15:10,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:15:10,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 22:15:10,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:10,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 22:15:10,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-01-27 22:15:10,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-27 22:15:10,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 1127 flow. Second operand has 16 states, 16 states have (on average 60.0625) internal successors, (961), 16 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:10,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:10,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-27 22:15:10,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:11,673 INFO L130 PetriNetUnfolder]: 537/1037 cut-off events. [2023-01-27 22:15:11,674 INFO L131 PetriNetUnfolder]: For 18920/18920 co-relation queries the response was YES. [2023-01-27 22:15:11,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6850 conditions, 1037 events. 537/1037 cut-off events. For 18920/18920 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5562 event pairs, 29 based on Foata normal form. 24/1061 useless extension candidates. Maximal degree in co-relation 5560. Up to 355 conditions per place. [2023-01-27 22:15:11,680 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 143 selfloop transitions, 105 changer transitions 33/281 dead transitions. [2023-01-27 22:15:11,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 281 transitions, 3057 flow [2023-01-27 22:15:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 22:15:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 22:15:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1937 transitions. [2023-01-27 22:15:11,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546948356807512 [2023-01-27 22:15:11,684 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1937 transitions. [2023-01-27 22:15:11,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1937 transitions. [2023-01-27 22:15:11,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:11,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1937 transitions. [2023-01-27 22:15:11,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.56666666666666) internal successors, (1937), 30 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:11,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:11,693 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:11,693 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 1127 flow. Second operand 30 states and 1937 transitions. [2023-01-27 22:15:11,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 281 transitions, 3057 flow [2023-01-27 22:15:11,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 281 transitions, 2806 flow, removed 119 selfloop flow, removed 3 redundant places. [2023-01-27 22:15:11,722 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1769 flow [2023-01-27 22:15:11,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1769, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2023-01-27 22:15:11,723 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 104 predicate places. [2023-01-27 22:15:11,723 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1769 flow [2023-01-27 22:15:11,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.0625) internal successors, (961), 16 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:11,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:11,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:11,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 22:15:11,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:11,929 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:11,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:11,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1580942134, now seen corresponding path program 6 times [2023-01-27 22:15:11,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:11,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380422366] [2023-01-27 22:15:11,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:11,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:12,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:12,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380422366] [2023-01-27 22:15:12,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380422366] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:12,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390343230] [2023-01-27 22:15:12,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:15:12,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:12,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:12,106 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) [2023-01-27 22:15:12,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 22:15:12,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 22:15:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:15:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:15:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:12,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:12,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390343230] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:15:12,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:15:12,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-01-27 22:15:12,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199890137] [2023-01-27 22:15:12,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:15:12,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 22:15:12,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:12,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 22:15:12,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-01-27 22:15:12,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-27 22:15:12,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 1769 flow. Second operand has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:12,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:12,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-27 22:15:12,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:13,244 INFO L130 PetriNetUnfolder]: 626/1220 cut-off events. [2023-01-27 22:15:13,245 INFO L131 PetriNetUnfolder]: For 29888/29888 co-relation queries the response was YES. [2023-01-27 22:15:13,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9038 conditions, 1220 events. 626/1220 cut-off events. For 29888/29888 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6893 event pairs, 103 based on Foata normal form. 40/1260 useless extension candidates. Maximal degree in co-relation 8284. Up to 443 conditions per place. [2023-01-27 22:15:13,254 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 114 selfloop transitions, 119 changer transitions 6/239 dead transitions. [2023-01-27 22:15:13,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 239 transitions, 3353 flow [2023-01-27 22:15:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 22:15:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 22:15:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1085 transitions. [2023-01-27 22:15:13,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494614747307374 [2023-01-27 22:15:13,257 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1085 transitions. [2023-01-27 22:15:13,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1085 transitions. [2023-01-27 22:15:13,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:13,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1085 transitions. [2023-01-27 22:15:13,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.8235294117647) internal successors, (1085), 17 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:13,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:13,262 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:13,262 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1769 flow. Second operand 17 states and 1085 transitions. [2023-01-27 22:15:13,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 239 transitions, 3353 flow [2023-01-27 22:15:13,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 239 transitions, 3099 flow, removed 97 selfloop flow, removed 13 redundant places. [2023-01-27 22:15:13,304 INFO L231 Difference]: Finished difference. Result has 133 places, 186 transitions, 2784 flow [2023-01-27 22:15:13,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2784, PETRI_PLACES=133, PETRI_TRANSITIONS=186} [2023-01-27 22:15:13,304 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-01-27 22:15:13,304 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 186 transitions, 2784 flow [2023-01-27 22:15:13,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:13,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:13,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:13,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 22:15:13,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:13,519 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:13,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:13,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1860953658, now seen corresponding path program 7 times [2023-01-27 22:15:13,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:13,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771163403] [2023-01-27 22:15:13,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:13,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:13,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:13,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771163403] [2023-01-27 22:15:13,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771163403] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:13,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642401513] [2023-01-27 22:15:13,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:15:13,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:13,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:13,656 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) [2023-01-27 22:15:13,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 22:15:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:13,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 22:15:13,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:13,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:13,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642401513] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:15:13,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:15:13,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 22:15:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699016574] [2023-01-27 22:15:13,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:15:13,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 22:15:13,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:13,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 22:15:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-01-27 22:15:13,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-27 22:15:13,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 186 transitions, 2784 flow. Second operand has 15 states, 15 states have (on average 57.06666666666667) internal successors, (856), 15 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:13,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:13,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-27 22:15:13,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:14,707 INFO L130 PetriNetUnfolder]: 810/1574 cut-off events. [2023-01-27 22:15:14,707 INFO L131 PetriNetUnfolder]: For 42907/42907 co-relation queries the response was YES. [2023-01-27 22:15:14,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12757 conditions, 1574 events. 810/1574 cut-off events. For 42907/42907 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9502 event pairs, 98 based on Foata normal form. 52/1626 useless extension candidates. Maximal degree in co-relation 11619. Up to 1051 conditions per place. [2023-01-27 22:15:14,721 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 213 selfloop transitions, 130 changer transitions 6/349 dead transitions. [2023-01-27 22:15:14,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 349 transitions, 5476 flow [2023-01-27 22:15:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 22:15:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 22:15:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1412 transitions. [2023-01-27 22:15:14,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43233312921004285 [2023-01-27 22:15:14,726 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1412 transitions. [2023-01-27 22:15:14,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1412 transitions. [2023-01-27 22:15:14,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:14,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1412 transitions. [2023-01-27 22:15:14,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 61.391304347826086) internal successors, (1412), 23 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:14,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:14,731 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:14,731 INFO L175 Difference]: Start difference. First operand has 133 places, 186 transitions, 2784 flow. Second operand 23 states and 1412 transitions. [2023-01-27 22:15:14,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 349 transitions, 5476 flow [2023-01-27 22:15:14,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 349 transitions, 5026 flow, removed 215 selfloop flow, removed 4 redundant places. [2023-01-27 22:15:14,830 INFO L231 Difference]: Finished difference. Result has 165 places, 256 transitions, 4217 flow [2023-01-27 22:15:14,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4217, PETRI_PLACES=165, PETRI_TRANSITIONS=256} [2023-01-27 22:15:14,830 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2023-01-27 22:15:14,830 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 256 transitions, 4217 flow [2023-01-27 22:15:14,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.06666666666667) internal successors, (856), 15 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:14,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:14,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:14,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-27 22:15:15,036 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,SelfDestructingSolverStorable9 [2023-01-27 22:15:15,036 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:15,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:15,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1468102828, now seen corresponding path program 8 times [2023-01-27 22:15:15,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:15,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922407929] [2023-01-27 22:15:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:15,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:15,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:15,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922407929] [2023-01-27 22:15:15,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922407929] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:15,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542383699] [2023-01-27 22:15:15,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:15:15,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:15,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:15,198 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) [2023-01-27 22:15:15,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 22:15:15,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:15:15,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:15:15,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:15:15,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:15,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542383699] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:15:15,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:15:15,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 22:15:15,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931599560] [2023-01-27 22:15:15,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:15:15,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 22:15:15,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:15,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 22:15:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-01-27 22:15:15,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-27 22:15:15,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 256 transitions, 4217 flow. Second operand has 15 states, 15 states have (on average 59.733333333333334) internal successors, (896), 15 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:15,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:15,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-27 22:15:15,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:17,061 INFO L130 PetriNetUnfolder]: 998/1958 cut-off events. [2023-01-27 22:15:17,061 INFO L131 PetriNetUnfolder]: For 73427/73427 co-relation queries the response was YES. [2023-01-27 22:15:17,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17101 conditions, 1958 events. 998/1958 cut-off events. For 73427/73427 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12509 event pairs, 168 based on Foata normal form. 24/1982 useless extension candidates. Maximal degree in co-relation 14924. Up to 886 conditions per place. [2023-01-27 22:15:17,086 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 209 selfloop transitions, 183 changer transitions 5/397 dead transitions. [2023-01-27 22:15:17,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 397 transitions, 7052 flow [2023-01-27 22:15:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 22:15:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 22:15:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1415 transitions. [2023-01-27 22:15:17,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529449423815621 [2023-01-27 22:15:17,088 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1415 transitions. [2023-01-27 22:15:17,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1415 transitions. [2023-01-27 22:15:17,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:17,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1415 transitions. [2023-01-27 22:15:17,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.31818181818181) internal successors, (1415), 22 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:17,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:17,096 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:17,097 INFO L175 Difference]: Start difference. First operand has 165 places, 256 transitions, 4217 flow. Second operand 22 states and 1415 transitions. [2023-01-27 22:15:17,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 397 transitions, 7052 flow [2023-01-27 22:15:17,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 397 transitions, 6218 flow, removed 399 selfloop flow, removed 5 redundant places. [2023-01-27 22:15:17,258 INFO L231 Difference]: Finished difference. Result has 191 places, 307 transitions, 5255 flow [2023-01-27 22:15:17,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5255, PETRI_PLACES=191, PETRI_TRANSITIONS=307} [2023-01-27 22:15:17,258 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-01-27 22:15:17,259 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 307 transitions, 5255 flow [2023-01-27 22:15:17,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 59.733333333333334) internal successors, (896), 15 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:17,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:17,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:17,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 22:15:17,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:17,463 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:17,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash 265383622, now seen corresponding path program 9 times [2023-01-27 22:15:17,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:17,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091593096] [2023-01-27 22:15:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:17,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:17,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:17,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091593096] [2023-01-27 22:15:17,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091593096] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:17,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195977533] [2023-01-27 22:15:17,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:15:17,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:17,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:17,693 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) [2023-01-27 22:15:17,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 22:15:17,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:15:17,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:15:17,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 22:15:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:17,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:15:18,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195977533] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:15:18,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:15:18,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 14 [2023-01-27 22:15:18,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766055963] [2023-01-27 22:15:18,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:15:18,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 22:15:18,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 22:15:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-01-27 22:15:18,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 142 [2023-01-27 22:15:18,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 307 transitions, 5255 flow. Second operand has 16 states, 16 states have (on average 53.5625) internal successors, (857), 16 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:18,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:18,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 142 [2023-01-27 22:15:18,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:18,728 INFO L130 PetriNetUnfolder]: 1317/2580 cut-off events. [2023-01-27 22:15:18,729 INFO L131 PetriNetUnfolder]: For 103291/103291 co-relation queries the response was YES. [2023-01-27 22:15:18,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23861 conditions, 2580 events. 1317/2580 cut-off events. For 103291/103291 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 17575 event pairs, 144 based on Foata normal form. 13/2593 useless extension candidates. Maximal degree in co-relation 22833. Up to 1044 conditions per place. [2023-01-27 22:15:18,754 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 248 selfloop transitions, 132 changer transitions 88/471 dead transitions. [2023-01-27 22:15:18,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 471 transitions, 9157 flow [2023-01-27 22:15:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 22:15:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 22:15:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 646 transitions. [2023-01-27 22:15:18,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41357234314980795 [2023-01-27 22:15:18,756 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 646 transitions. [2023-01-27 22:15:18,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 646 transitions. [2023-01-27 22:15:18,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:18,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 646 transitions. [2023-01-27 22:15:18,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.72727272727273) internal successors, (646), 11 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:18,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:18,758 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:18,758 INFO L175 Difference]: Start difference. First operand has 191 places, 307 transitions, 5255 flow. Second operand 11 states and 646 transitions. [2023-01-27 22:15:18,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 471 transitions, 9157 flow [2023-01-27 22:15:19,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 471 transitions, 8904 flow, removed 92 selfloop flow, removed 4 redundant places. [2023-01-27 22:15:19,039 INFO L231 Difference]: Finished difference. Result has 203 places, 330 transitions, 6244 flow [2023-01-27 22:15:19,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5060, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6244, PETRI_PLACES=203, PETRI_TRANSITIONS=330} [2023-01-27 22:15:19,040 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 183 predicate places. [2023-01-27 22:15:19,040 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 330 transitions, 6244 flow [2023-01-27 22:15:19,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 53.5625) internal successors, (857), 16 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:19,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:19,040 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:19,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 22:15:19,245 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,SelfDestructingSolverStorable11 [2023-01-27 22:15:19,245 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:19,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -27278176, now seen corresponding path program 10 times [2023-01-27 22:15:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238341776] [2023-01-27 22:15:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:19,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:19,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:19,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238341776] [2023-01-27 22:15:19,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238341776] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:19,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368560805] [2023-01-27 22:15:19,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:15:19,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:19,495 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) [2023-01-27 22:15:19,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 22:15:19,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:15:19,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:15:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 22:15:19,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:15:19,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 22:15:19,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368560805] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:15:19,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:15:19,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-01-27 22:15:19,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021403027] [2023-01-27 22:15:19,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:15:19,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 22:15:19,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:19,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 22:15:19,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-01-27 22:15:19,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:15:19,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 330 transitions, 6244 flow. Second operand has 15 states, 15 states have (on average 55.266666666666666) internal successors, (829), 15 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:19,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:19,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:15:19,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:21,181 INFO L130 PetriNetUnfolder]: 1163/2353 cut-off events. [2023-01-27 22:15:21,181 INFO L131 PetriNetUnfolder]: For 125038/125038 co-relation queries the response was YES. [2023-01-27 22:15:21,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22748 conditions, 2353 events. 1163/2353 cut-off events. For 125038/125038 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16153 event pairs, 98 based on Foata normal form. 62/2415 useless extension candidates. Maximal degree in co-relation 21468. Up to 972 conditions per place. [2023-01-27 22:15:21,208 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 274 selfloop transitions, 154 changer transitions 48/476 dead transitions. [2023-01-27 22:15:21,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 476 transitions, 9738 flow [2023-01-27 22:15:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 22:15:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 22:15:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1906 transitions. [2023-01-27 22:15:21,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067434912505335 [2023-01-27 22:15:21,270 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1906 transitions. [2023-01-27 22:15:21,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1906 transitions. [2023-01-27 22:15:21,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:15:21,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1906 transitions. [2023-01-27 22:15:21,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.75757575757576) internal successors, (1906), 33 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:21,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:21,277 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:21,277 INFO L175 Difference]: Start difference. First operand has 203 places, 330 transitions, 6244 flow. Second operand 33 states and 1906 transitions. [2023-01-27 22:15:21,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 476 transitions, 9738 flow [2023-01-27 22:15:21,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 476 transitions, 9256 flow, removed 217 selfloop flow, removed 3 redundant places. [2023-01-27 22:15:21,523 INFO L231 Difference]: Finished difference. Result has 243 places, 357 transitions, 7078 flow [2023-01-27 22:15:21,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7078, PETRI_PLACES=243, PETRI_TRANSITIONS=357} [2023-01-27 22:15:21,524 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 223 predicate places. [2023-01-27 22:15:21,524 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 357 transitions, 7078 flow [2023-01-27 22:15:21,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.266666666666666) internal successors, (829), 15 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:21,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:15:21,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:15:21,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-27 22:15:21,729 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,SelfDestructingSolverStorable12 [2023-01-27 22:15:21,729 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:15:21,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:15:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1060710988, now seen corresponding path program 11 times [2023-01-27 22:15:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:15:21,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546205993] [2023-01-27 22:15:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:15:21,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:15:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:15:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:21,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:15:21,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546205993] [2023-01-27 22:15:21,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546205993] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:15:21,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308537300] [2023-01-27 22:15:21,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:15:21,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:15:21,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:15:21,887 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) [2023-01-27 22:15:21,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 22:15:21,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:15:21,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:15:21,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-27 22:15:21,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:15:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:22,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:15:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:15:49,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308537300] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:15:49,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:15:49,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-01-27 22:15:49,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058432330] [2023-01-27 22:15:49,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:15:49,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 22:15:49,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:15:49,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 22:15:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-01-27 22:15:49,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:15:49,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 357 transitions, 7078 flow. Second operand has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:15:49,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:15:49,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:15:49,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:15:56,581 WARN L222 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 22:15:58,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:16:00,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:16:03,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:16:05,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:16:12,240 WARN L222 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 85 DAG size of output: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 22:16:14,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:16:20,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:16:23,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 22:16:25,808 INFO L130 PetriNetUnfolder]: 1356/2709 cut-off events. [2023-01-27 22:16:25,808 INFO L131 PetriNetUnfolder]: For 138423/138423 co-relation queries the response was YES. [2023-01-27 22:16:25,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26776 conditions, 2709 events. 1356/2709 cut-off events. For 138423/138423 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 18886 event pairs, 36 based on Foata normal form. 36/2745 useless extension candidates. Maximal degree in co-relation 26188. Up to 698 conditions per place. [2023-01-27 22:16:25,839 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 226 selfloop transitions, 321 changer transitions 4/551 dead transitions. [2023-01-27 22:16:25,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 551 transitions, 11752 flow [2023-01-27 22:16:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 22:16:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 22:16:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1575 transitions. [2023-01-27 22:16:25,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107981220657277 [2023-01-27 22:16:25,842 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1575 transitions. [2023-01-27 22:16:25,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1575 transitions. [2023-01-27 22:16:25,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:16:25,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1575 transitions. [2023-01-27 22:16:25,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.333333333333336) internal successors, (1575), 27 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) [2023-01-27 22:16:25,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:16:25,853 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:16:25,853 INFO L175 Difference]: Start difference. First operand has 243 places, 357 transitions, 7078 flow. Second operand 27 states and 1575 transitions. [2023-01-27 22:16:25,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 551 transitions, 11752 flow [2023-01-27 22:16:26,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 551 transitions, 10970 flow, removed 256 selfloop flow, removed 14 redundant places. [2023-01-27 22:16:26,234 INFO L231 Difference]: Finished difference. Result has 259 places, 469 transitions, 10489 flow [2023-01-27 22:16:26,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=6557, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10489, PETRI_PLACES=259, PETRI_TRANSITIONS=469} [2023-01-27 22:16:26,235 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2023-01-27 22:16:26,235 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 469 transitions, 10489 flow [2023-01-27 22:16:26,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:16:26,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:16:26,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:16:26,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 22:16:26,440 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,SelfDestructingSolverStorable13 [2023-01-27 22:16:26,441 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:16:26,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:16:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash 881546728, now seen corresponding path program 12 times [2023-01-27 22:16:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:16:26,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703408757] [2023-01-27 22:16:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:16:26,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:16:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:16:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:16:26,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:16:26,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703408757] [2023-01-27 22:16:26,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703408757] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:16:26,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632611305] [2023-01-27 22:16:26,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:16:26,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:16:26,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:16:26,580 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) [2023-01-27 22:16:26,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 22:16:26,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:16:26,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:16:26,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 22:16:26,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:16:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:16:26,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:16:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:16:52,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632611305] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:16:52,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:16:52,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-27 22:16:52,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680914598] [2023-01-27 22:16:52,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:16:52,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 22:16:52,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:16:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 22:16:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-01-27 22:16:52,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-27 22:16:52,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 469 transitions, 10489 flow. Second operand has 18 states, 18 states have (on average 56.94444444444444) internal successors, (1025), 18 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:16:52,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:16:52,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-27 22:16:52,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:16:56,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:16:59,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:17:02,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:17:04,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:17:07,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 22:17:10,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:17:13,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:17:13,965 INFO L130 PetriNetUnfolder]: 1793/3512 cut-off events. [2023-01-27 22:17:13,965 INFO L131 PetriNetUnfolder]: For 170852/170852 co-relation queries the response was YES. [2023-01-27 22:17:13,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37726 conditions, 3512 events. 1793/3512 cut-off events. For 170852/170852 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 25145 event pairs, 38 based on Foata normal form. 36/3548 useless extension candidates. Maximal degree in co-relation 36957. Up to 991 conditions per place. [2023-01-27 22:17:14,003 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 246 selfloop transitions, 485 changer transitions 6/737 dead transitions. [2023-01-27 22:17:14,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 737 transitions, 18122 flow [2023-01-27 22:17:14,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 22:17:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 22:17:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1341 transitions. [2023-01-27 22:17:14,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292573623559539 [2023-01-27 22:17:14,015 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1341 transitions. [2023-01-27 22:17:14,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1341 transitions. [2023-01-27 22:17:14,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:17:14,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1341 transitions. [2023-01-27 22:17:14,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 60.95454545454545) internal successors, (1341), 22 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:14,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:14,019 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:14,019 INFO L175 Difference]: Start difference. First operand has 259 places, 469 transitions, 10489 flow. Second operand 22 states and 1341 transitions. [2023-01-27 22:17:14,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 737 transitions, 18122 flow [2023-01-27 22:17:14,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 737 transitions, 15964 flow, removed 1014 selfloop flow, removed 21 redundant places. [2023-01-27 22:17:14,795 INFO L231 Difference]: Finished difference. Result has 270 places, 652 transitions, 15417 flow [2023-01-27 22:17:14,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=9206, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15417, PETRI_PLACES=270, PETRI_TRANSITIONS=652} [2023-01-27 22:17:14,796 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-01-27 22:17:14,796 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 652 transitions, 15417 flow [2023-01-27 22:17:14,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.94444444444444) internal successors, (1025), 18 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:14,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:17:14,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:17:14,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 22:17:15,001 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,SelfDestructingSolverStorable14 [2023-01-27 22:17:15,001 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:17:15,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:17:15,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2093573005, now seen corresponding path program 13 times [2023-01-27 22:17:15,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:17:15,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912203933] [2023-01-27 22:17:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:17:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:17:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:17:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:15,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:17:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912203933] [2023-01-27 22:17:15,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912203933] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:17:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074636075] [2023-01-27 22:17:15,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:17:15,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:17:15,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:17:15,296 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) [2023-01-27 22:17:15,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 22:17:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:17:15,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-27 22:17:15,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:17:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:15,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:17:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:15,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074636075] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:17:15,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:17:15,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-01-27 22:17:15,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994154461] [2023-01-27 22:17:15,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:17:15,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 22:17:15,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:17:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 22:17:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-01-27 22:17:15,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:17:15,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 652 transitions, 15417 flow. Second operand has 24 states, 24 states have (on average 55.083333333333336) internal successors, (1322), 24 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:15,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:17:15,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:17:15,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:17:18,700 INFO L130 PetriNetUnfolder]: 3323/6684 cut-off events. [2023-01-27 22:17:18,700 INFO L131 PetriNetUnfolder]: For 250486/250486 co-relation queries the response was YES. [2023-01-27 22:17:18,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69842 conditions, 6684 events. 3323/6684 cut-off events. For 250486/250486 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 55053 event pairs, 358 based on Foata normal form. 72/6756 useless extension candidates. Maximal degree in co-relation 68139. Up to 2809 conditions per place. [2023-01-27 22:17:18,780 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 981 selfloop transitions, 377 changer transitions 27/1385 dead transitions. [2023-01-27 22:17:18,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1385 transitions, 34826 flow [2023-01-27 22:17:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 22:17:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 22:17:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2017 transitions. [2023-01-27 22:17:18,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41777133388566695 [2023-01-27 22:17:18,943 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2017 transitions. [2023-01-27 22:17:18,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2017 transitions. [2023-01-27 22:17:18,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:17:18,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2017 transitions. [2023-01-27 22:17:18,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 59.3235294117647) internal successors, (2017), 34 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:18,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 142.0) internal successors, (4970), 35 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:18,949 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 142.0) internal successors, (4970), 35 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:18,949 INFO L175 Difference]: Start difference. First operand has 270 places, 652 transitions, 15417 flow. Second operand 34 states and 2017 transitions. [2023-01-27 22:17:18,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1385 transitions, 34826 flow [2023-01-27 22:17:21,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 1385 transitions, 32254 flow, removed 1087 selfloop flow, removed 12 redundant places. [2023-01-27 22:17:21,065 INFO L231 Difference]: Finished difference. Result has 307 places, 899 transitions, 21555 flow [2023-01-27 22:17:21,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=14233, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=21555, PETRI_PLACES=307, PETRI_TRANSITIONS=899} [2023-01-27 22:17:21,066 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 287 predicate places. [2023-01-27 22:17:21,066 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 899 transitions, 21555 flow [2023-01-27 22:17:21,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 55.083333333333336) internal successors, (1322), 24 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:21,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:17:21,067 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:17:21,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-01-27 22:17:21,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:17:21,271 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:17:21,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:17:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1421936881, now seen corresponding path program 14 times [2023-01-27 22:17:21,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:17:21,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488005436] [2023-01-27 22:17:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:17:21,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:17:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:17:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:21,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:17:21,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488005436] [2023-01-27 22:17:21,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488005436] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:17:21,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857360818] [2023-01-27 22:17:21,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:17:21,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:17:21,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:17:21,557 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) [2023-01-27 22:17:21,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 22:17:21,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:17:21,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:17:21,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-27 22:17:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:17:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:21,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:17:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:22,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857360818] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:17:22,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:17:22,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-27 22:17:22,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840748539] [2023-01-27 22:17:22,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:17:22,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:17:22,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:17:22,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:17:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:17:22,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:17:22,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 899 transitions, 21555 flow. Second operand has 22 states, 22 states have (on average 54.81818181818182) internal successors, (1206), 22 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:22,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:17:22,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:17:22,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:17:26,443 INFO L130 PetriNetUnfolder]: 3500/6989 cut-off events. [2023-01-27 22:17:26,443 INFO L131 PetriNetUnfolder]: For 281497/281497 co-relation queries the response was YES. [2023-01-27 22:17:26,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73490 conditions, 6989 events. 3500/6989 cut-off events. For 281497/281497 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 57633 event pairs, 383 based on Foata normal form. 106/7095 useless extension candidates. Maximal degree in co-relation 72381. Up to 2780 conditions per place. [2023-01-27 22:17:26,522 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1020 selfloop transitions, 424 changer transitions 11/1455 dead transitions. [2023-01-27 22:17:26,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1455 transitions, 36102 flow [2023-01-27 22:17:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 22:17:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 22:17:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2346 transitions. [2023-01-27 22:17:26,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4130281690140845 [2023-01-27 22:17:26,525 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2346 transitions. [2023-01-27 22:17:26,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2346 transitions. [2023-01-27 22:17:26,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:17:26,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2346 transitions. [2023-01-27 22:17:26,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 58.65) internal successors, (2346), 40 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:26,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:26,532 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:26,532 INFO L175 Difference]: Start difference. First operand has 307 places, 899 transitions, 21555 flow. Second operand 40 states and 2346 transitions. [2023-01-27 22:17:26,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1455 transitions, 36102 flow [2023-01-27 22:17:28,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1455 transitions, 34891 flow, removed 560 selfloop flow, removed 8 redundant places. [2023-01-27 22:17:28,941 INFO L231 Difference]: Finished difference. Result has 347 places, 980 transitions, 23965 flow [2023-01-27 22:17:28,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=20476, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=23965, PETRI_PLACES=347, PETRI_TRANSITIONS=980} [2023-01-27 22:17:28,942 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 327 predicate places. [2023-01-27 22:17:28,942 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 980 transitions, 23965 flow [2023-01-27 22:17:28,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.81818181818182) internal successors, (1206), 22 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:28,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:17:28,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:17:28,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-27 22:17:29,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 22:17:29,146 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:17:29,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:17:29,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1409095033, now seen corresponding path program 15 times [2023-01-27 22:17:29,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:17:29,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691652553] [2023-01-27 22:17:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:17:29,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:17:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:17:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:29,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:17:29,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691652553] [2023-01-27 22:17:29,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691652553] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:17:29,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446332741] [2023-01-27 22:17:29,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:17:29,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:17:29,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:17:29,343 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) [2023-01-27 22:17:29,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 22:17:29,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 22:17:29,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:17:29,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 22:17:29,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:17:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:29,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:17:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:30,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446332741] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:17:30,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:17:30,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-01-27 22:17:30,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538649981] [2023-01-27 22:17:30,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:17:30,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 22:17:30,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:17:30,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 22:17:30,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-01-27 22:17:30,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:17:30,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 980 transitions, 23965 flow. Second operand has 21 states, 21 states have (on average 54.857142857142854) internal successors, (1152), 21 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:30,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:17:30,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:17:30,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:17:35,237 INFO L130 PetriNetUnfolder]: 4516/9254 cut-off events. [2023-01-27 22:17:35,238 INFO L131 PetriNetUnfolder]: For 443477/443477 co-relation queries the response was YES. [2023-01-27 22:17:35,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100427 conditions, 9254 events. 4516/9254 cut-off events. For 443477/443477 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 82460 event pairs, 127 based on Foata normal form. 60/9314 useless extension candidates. Maximal degree in co-relation 98667. Up to 1783 conditions per place. [2023-01-27 22:17:35,343 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 795 selfloop transitions, 1072 changer transitions 17/1884 dead transitions. [2023-01-27 22:17:35,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1884 transitions, 48164 flow [2023-01-27 22:17:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-27 22:17:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-27 22:17:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2698 transitions. [2023-01-27 22:17:35,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-01-27 22:17:35,347 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2698 transitions. [2023-01-27 22:17:35,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2698 transitions. [2023-01-27 22:17:35,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:17:35,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2698 transitions. [2023-01-27 22:17:35,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 59.955555555555556) internal successors, (2698), 45 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:35,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 142.0) internal successors, (6532), 46 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:35,355 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 142.0) internal successors, (6532), 46 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:35,355 INFO L175 Difference]: Start difference. First operand has 347 places, 980 transitions, 23965 flow. Second operand 45 states and 2698 transitions. [2023-01-27 22:17:35,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1884 transitions, 48164 flow [2023-01-27 22:17:39,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1884 transitions, 47183 flow, removed 370 selfloop flow, removed 16 redundant places. [2023-01-27 22:17:39,718 INFO L231 Difference]: Finished difference. Result has 390 places, 1406 transitions, 38460 flow [2023-01-27 22:17:39,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=23103, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=683, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=38460, PETRI_PLACES=390, PETRI_TRANSITIONS=1406} [2023-01-27 22:17:39,719 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 370 predicate places. [2023-01-27 22:17:39,720 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 1406 transitions, 38460 flow [2023-01-27 22:17:39,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.857142857142854) internal successors, (1152), 21 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:39,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:17:39,720 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:17:39,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 22:17:39,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 22:17:39,925 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:17:39,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:17:39,925 INFO L85 PathProgramCache]: Analyzing trace with hash -237627691, now seen corresponding path program 16 times [2023-01-27 22:17:39,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:17:39,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594280707] [2023-01-27 22:17:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:17:39,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:17:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:17:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:40,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:17:40,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594280707] [2023-01-27 22:17:40,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594280707] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:17:40,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013263716] [2023-01-27 22:17:40,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:17:40,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:17:40,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:17:40,127 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) [2023-01-27 22:17:40,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 22:17:40,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:17:40,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:17:40,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 22:17:40,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:17:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:40,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:17:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:40,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013263716] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:17:40,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:17:40,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-27 22:17:40,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457732264] [2023-01-27 22:17:40,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:17:40,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 22:17:40,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:17:40,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 22:17:40,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-01-27 22:17:40,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:17:40,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 1406 transitions, 38460 flow. Second operand has 18 states, 18 states have (on average 54.611111111111114) internal successors, (983), 18 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:40,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:17:40,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:17:40,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:17:43,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:17:51,922 INFO L130 PetriNetUnfolder]: 4850/9877 cut-off events. [2023-01-27 22:17:51,922 INFO L131 PetriNetUnfolder]: For 606461/606461 co-relation queries the response was YES. [2023-01-27 22:17:52,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117770 conditions, 9877 events. 4850/9877 cut-off events. For 606461/606461 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 87634 event pairs, 399 based on Foata normal form. 116/9993 useless extension candidates. Maximal degree in co-relation 115966. Up to 1985 conditions per place. [2023-01-27 22:17:52,072 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 914 selfloop transitions, 991 changer transitions 27/1932 dead transitions. [2023-01-27 22:17:52,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1932 transitions, 54072 flow [2023-01-27 22:17:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-01-27 22:17:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-01-27 22:17:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4105 transitions. [2023-01-27 22:17:52,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40716127752430076 [2023-01-27 22:17:52,099 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4105 transitions. [2023-01-27 22:17:52,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4105 transitions. [2023-01-27 22:17:52,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:17:52,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4105 transitions. [2023-01-27 22:17:52,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 57.816901408450704) internal successors, (4105), 71 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:52,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 142.0) internal successors, (10224), 72 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:52,114 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 142.0) internal successors, (10224), 72 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:52,114 INFO L175 Difference]: Start difference. First operand has 390 places, 1406 transitions, 38460 flow. Second operand 71 states and 4105 transitions. [2023-01-27 22:17:52,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1932 transitions, 54072 flow [2023-01-27 22:17:58,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1932 transitions, 51865 flow, removed 1007 selfloop flow, removed 18 redundant places. [2023-01-27 22:17:58,703 INFO L231 Difference]: Finished difference. Result has 456 places, 1560 transitions, 44769 flow [2023-01-27 22:17:58,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=35335, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=779, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=44769, PETRI_PLACES=456, PETRI_TRANSITIONS=1560} [2023-01-27 22:17:58,708 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 436 predicate places. [2023-01-27 22:17:58,709 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 1560 transitions, 44769 flow [2023-01-27 22:17:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.611111111111114) internal successors, (983), 18 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:58,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:17:58,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:17:58,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 22:17:58,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:17:58,913 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:17:58,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:17:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash 604358229, now seen corresponding path program 17 times [2023-01-27 22:17:58,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:17:58,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208630564] [2023-01-27 22:17:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:17:58,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:17:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:17:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:59,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:17:59,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208630564] [2023-01-27 22:17:59,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208630564] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:17:59,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643628162] [2023-01-27 22:17:59,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:17:59,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:17:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:17:59,214 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) [2023-01-27 22:17:59,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 22:17:59,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:17:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:17:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 22:17:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:17:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:59,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:17:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:17:59,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643628162] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:17:59,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:17:59,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-27 22:17:59,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558634126] [2023-01-27 22:17:59,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:17:59,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 22:17:59,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:17:59,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 22:17:59,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-01-27 22:17:59,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-27 22:17:59,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1560 transitions, 44769 flow. Second operand has 20 states, 20 states have (on average 56.9) internal successors, (1138), 20 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:17:59,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:17:59,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-27 22:17:59,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:18:09,151 INFO L130 PetriNetUnfolder]: 4941/9992 cut-off events. [2023-01-27 22:18:09,151 INFO L131 PetriNetUnfolder]: For 674092/674092 co-relation queries the response was YES. [2023-01-27 22:18:09,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122299 conditions, 9992 events. 4941/9992 cut-off events. For 674092/674092 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 88328 event pairs, 271 based on Foata normal form. 68/10060 useless extension candidates. Maximal degree in co-relation 120663. Up to 3055 conditions per place. [2023-01-27 22:18:09,292 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 770 selfloop transitions, 997 changer transitions 12/1779 dead transitions. [2023-01-27 22:18:09,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 1779 transitions, 52060 flow [2023-01-27 22:18:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-27 22:18:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-01-27 22:18:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2594 transitions. [2023-01-27 22:18:09,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42482803799541435 [2023-01-27 22:18:09,309 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2594 transitions. [2023-01-27 22:18:09,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2594 transitions. [2023-01-27 22:18:09,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:18:09,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2594 transitions. [2023-01-27 22:18:09,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 60.325581395348834) internal successors, (2594), 43 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:18:09,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 142.0) internal successors, (6248), 44 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:18:09,316 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 142.0) internal successors, (6248), 44 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:18:09,316 INFO L175 Difference]: Start difference. First operand has 456 places, 1560 transitions, 44769 flow. Second operand 43 states and 2594 transitions. [2023-01-27 22:18:09,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 1779 transitions, 52060 flow [2023-01-27 22:18:16,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1779 transitions, 48598 flow, removed 1444 selfloop flow, removed 34 redundant places. [2023-01-27 22:18:16,841 INFO L231 Difference]: Finished difference. Result has 461 places, 1619 transitions, 45692 flow [2023-01-27 22:18:16,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=41357, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=926, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=45692, PETRI_PLACES=461, PETRI_TRANSITIONS=1619} [2023-01-27 22:18:16,842 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 441 predicate places. [2023-01-27 22:18:16,842 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1619 transitions, 45692 flow [2023-01-27 22:18:16,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.9) internal successors, (1138), 20 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:18:16,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:18:16,843 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:18:16,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 22:18:17,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:18:17,047 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:18:17,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:18:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1936626857, now seen corresponding path program 18 times [2023-01-27 22:18:17,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:18:17,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095731414] [2023-01-27 22:18:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:18:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:18:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:18:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:18:17,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:18:17,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095731414] [2023-01-27 22:18:17,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095731414] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:18:17,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490277509] [2023-01-27 22:18:17,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:18:17,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:18:17,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:18:17,290 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) [2023-01-27 22:18:17,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 22:18:17,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 22:18:17,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:18:17,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 22:18:17,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:18:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:18:17,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:18:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:18:18,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490277509] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:18:18,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:18:18,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-27 22:18:18,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140439407] [2023-01-27 22:18:18,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:18:18,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 22:18:18,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:18:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 22:18:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-01-27 22:18:18,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:18:18,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1619 transitions, 45692 flow. Second operand has 23 states, 23 states have (on average 54.78260869565217) internal successors, (1260), 23 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:18:18,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:18:18,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:18:18,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:18:27,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:18:33,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:18:52,951 WARN L222 SmtUtils]: Spent 13.37s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 22:18:54,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:18:57,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:19:11,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 22:19:23,102 INFO L130 PetriNetUnfolder]: 7256/15018 cut-off events. [2023-01-27 22:19:23,102 INFO L131 PetriNetUnfolder]: For 1164839/1164839 co-relation queries the response was YES. [2023-01-27 22:19:23,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186981 conditions, 15018 events. 7256/15018 cut-off events. For 1164839/1164839 co-relation queries the response was YES. Maximal size of possible extension queue 1171. Compared 144484 event pairs, 272 based on Foata normal form. 98/15116 useless extension candidates. Maximal degree in co-relation 183770. Up to 4234 conditions per place. [2023-01-27 22:19:23,354 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1131 selfloop transitions, 1515 changer transitions 14/2660 dead transitions. [2023-01-27 22:19:23,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2660 transitions, 78694 flow [2023-01-27 22:19:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-01-27 22:19:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-01-27 22:19:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3651 transitions. [2023-01-27 22:19:23,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146978646069968 [2023-01-27 22:19:23,375 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3651 transitions. [2023-01-27 22:19:23,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3651 transitions. [2023-01-27 22:19:23,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:23,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3651 transitions. [2023-01-27 22:19:23,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 58.88709677419355) internal successors, (3651), 62 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:23,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 142.0) internal successors, (8946), 63 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:23,401 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 142.0) internal successors, (8946), 63 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:23,401 INFO L175 Difference]: Start difference. First operand has 461 places, 1619 transitions, 45692 flow. Second operand 62 states and 3651 transitions. [2023-01-27 22:19:23,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2660 transitions, 78694 flow [2023-01-27 22:19:37,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 2660 transitions, 77393 flow, removed 479 selfloop flow, removed 21 redundant places. [2023-01-27 22:19:37,726 INFO L231 Difference]: Finished difference. Result has 526 places, 2257 transitions, 70555 flow [2023-01-27 22:19:37,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=44854, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=965, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=70555, PETRI_PLACES=526, PETRI_TRANSITIONS=2257} [2023-01-27 22:19:37,727 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 506 predicate places. [2023-01-27 22:19:37,727 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 2257 transitions, 70555 flow [2023-01-27 22:19:37,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.78260869565217) internal successors, (1260), 23 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:37,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:19:37,728 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:19:37,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-01-27 22:19:37,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:37,932 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:19:37,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:19:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1918400809, now seen corresponding path program 19 times [2023-01-27 22:19:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:19:37,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974307718] [2023-01-27 22:19:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:19:37,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:19:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:38,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:19:38,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974307718] [2023-01-27 22:19:38,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974307718] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:19:38,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897094322] [2023-01-27 22:19:38,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:19:38,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:19:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:19:38,134 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) [2023-01-27 22:19:38,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 22:19:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:19:38,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-27 22:19:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:19:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:38,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:19:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:19:38,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897094322] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:19:38,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:19:38,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-27 22:19:38,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087215548] [2023-01-27 22:19:38,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:19:38,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:19:38,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:19:38,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:19:38,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:19:38,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:19:38,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 2257 transitions, 70555 flow. Second operand has 22 states, 22 states have (on average 54.72727272727273) internal successors, (1204), 22 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:38,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:19:38,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:19:38,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:19:53,097 INFO L130 PetriNetUnfolder]: 7879/16222 cut-off events. [2023-01-27 22:19:53,098 INFO L131 PetriNetUnfolder]: For 1604379/1604379 co-relation queries the response was YES. [2023-01-27 22:19:53,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217976 conditions, 16222 events. 7879/16222 cut-off events. For 1604379/1604379 co-relation queries the response was YES. Maximal size of possible extension queue 1276. Compared 157338 event pairs, 1027 based on Foata normal form. 126/16348 useless extension candidates. Maximal degree in co-relation 215993. Up to 11999 conditions per place. [2023-01-27 22:19:53,383 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 2069 selfloop transitions, 607 changer transitions 7/2683 dead transitions. [2023-01-27 22:19:53,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 2683 transitions, 86341 flow [2023-01-27 22:19:53,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-27 22:19:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-27 22:19:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2885 transitions. [2023-01-27 22:19:53,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146306409887899 [2023-01-27 22:19:53,394 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2885 transitions. [2023-01-27 22:19:53,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2885 transitions. [2023-01-27 22:19:53,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:19:53,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2885 transitions. [2023-01-27 22:19:53,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 58.87755102040816) internal successors, (2885), 49 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:53,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 142.0) internal successors, (7100), 50 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:53,401 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 142.0) internal successors, (7100), 50 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:19:53,401 INFO L175 Difference]: Start difference. First operand has 526 places, 2257 transitions, 70555 flow. Second operand 49 states and 2885 transitions. [2023-01-27 22:19:53,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 2683 transitions, 86341 flow [2023-01-27 22:20:13,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 2683 transitions, 83552 flow, removed 1333 selfloop flow, removed 19 redundant places. [2023-01-27 22:20:13,576 INFO L231 Difference]: Finished difference. Result has 572 places, 2408 transitions, 75378 flow [2023-01-27 22:20:13,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=68099, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=75378, PETRI_PLACES=572, PETRI_TRANSITIONS=2408} [2023-01-27 22:20:13,578 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 552 predicate places. [2023-01-27 22:20:13,579 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 2408 transitions, 75378 flow [2023-01-27 22:20:13,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.72727272727273) internal successors, (1204), 22 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:13,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:13,579 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:13,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 22:20:13,784 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,SelfDestructingSolverStorable21 [2023-01-27 22:20:13,784 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:13,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1553603635, now seen corresponding path program 20 times [2023-01-27 22:20:13,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:13,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563516123] [2023-01-27 22:20:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:13,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:14,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:14,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563516123] [2023-01-27 22:20:14,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563516123] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:14,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787247494] [2023-01-27 22:20:14,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:20:14,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:14,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:14,017 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) [2023-01-27 22:20:14,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 22:20:14,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:20:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:14,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 22:20:14,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:14,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:14,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787247494] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:14,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:14,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-27 22:20:14,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122502088] [2023-01-27 22:20:14,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:14,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 22:20:14,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:14,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 22:20:14,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-01-27 22:20:14,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-27 22:20:14,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 2408 transitions, 75378 flow. Second operand has 22 states, 22 states have (on average 56.72727272727273) internal successors, (1248), 22 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:14,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:14,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-27 22:20:14,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:20:30,931 INFO L130 PetriNetUnfolder]: 8056/16521 cut-off events. [2023-01-27 22:20:30,932 INFO L131 PetriNetUnfolder]: For 1804945/1804945 co-relation queries the response was YES. [2023-01-27 22:20:31,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226120 conditions, 16521 events. 8056/16521 cut-off events. For 1804945/1804945 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 160096 event pairs, 529 based on Foata normal form. 98/16619 useless extension candidates. Maximal degree in co-relation 223250. Up to 6022 conditions per place. [2023-01-27 22:20:31,325 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1269 selfloop transitions, 1363 changer transitions 11/2643 dead transitions. [2023-01-27 22:20:31,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 2643 transitions, 85228 flow [2023-01-27 22:20:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-27 22:20:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-27 22:20:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2473 transitions. [2023-01-27 22:20:31,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247681209206458 [2023-01-27 22:20:31,327 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2473 transitions. [2023-01-27 22:20:31,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2473 transitions. [2023-01-27 22:20:31,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:20:31,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2473 transitions. [2023-01-27 22:20:31,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 60.31707317073171) internal successors, (2473), 41 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:31,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 142.0) internal successors, (5964), 42 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:31,333 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 142.0) internal successors, (5964), 42 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:31,333 INFO L175 Difference]: Start difference. First operand has 572 places, 2408 transitions, 75378 flow. Second operand 41 states and 2473 transitions. [2023-01-27 22:20:31,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 2643 transitions, 85228 flow [2023-01-27 22:20:56,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 2643 transitions, 83826 flow, removed 556 selfloop flow, removed 19 redundant places. [2023-01-27 22:20:56,675 INFO L231 Difference]: Finished difference. Result has 600 places, 2490 transitions, 80413 flow [2023-01-27 22:20:56,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=74005, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=80413, PETRI_PLACES=600, PETRI_TRANSITIONS=2490} [2023-01-27 22:20:56,676 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 580 predicate places. [2023-01-27 22:20:56,677 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 2490 transitions, 80413 flow [2023-01-27 22:20:56,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.72727272727273) internal successors, (1248), 22 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:56,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:20:56,677 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:20:56,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-27 22:20:56,884 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,SelfDestructingSolverStorable22 [2023-01-27 22:20:56,885 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:20:56,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:20:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2080956109, now seen corresponding path program 21 times [2023-01-27 22:20:56,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:20:56,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495863599] [2023-01-27 22:20:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:20:56,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:20:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:20:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:57,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:20:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495863599] [2023-01-27 22:20:57,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495863599] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:20:57,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771607868] [2023-01-27 22:20:57,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 22:20:57,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:20:57,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:20:57,142 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) [2023-01-27 22:20:57,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 22:20:57,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 22:20:57,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:20:57,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 22:20:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:20:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:57,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:20:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:20:57,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771607868] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:20:57,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:20:57,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-27 22:20:57,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609432463] [2023-01-27 22:20:57,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:20:57,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 22:20:57,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:20:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 22:20:57,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-01-27 22:20:57,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:20:57,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 2490 transitions, 80413 flow. Second operand has 25 states, 25 states have (on average 54.88) internal successors, (1372), 25 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:20:57,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:20:57,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:20:57,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:21:20,447 INFO L130 PetriNetUnfolder]: 9749/19840 cut-off events. [2023-01-27 22:21:20,447 INFO L131 PetriNetUnfolder]: For 2418649/2418649 co-relation queries the response was YES. [2023-01-27 22:21:20,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282293 conditions, 19840 events. 9749/19840 cut-off events. For 2418649/2418649 co-relation queries the response was YES. Maximal size of possible extension queue 1515. Compared 196764 event pairs, 218 based on Foata normal form. 288/20128 useless extension candidates. Maximal degree in co-relation 279242. Up to 6404 conditions per place. [2023-01-27 22:21:21,001 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 1071 selfloop transitions, 2118 changer transitions 121/3310 dead transitions. [2023-01-27 22:21:21,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 3310 transitions, 113383 flow [2023-01-27 22:21:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-27 22:21:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-27 22:21:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2452 transitions. [2023-01-27 22:21:21,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41113346747149565 [2023-01-27 22:21:21,004 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2452 transitions. [2023-01-27 22:21:21,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2452 transitions. [2023-01-27 22:21:21,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:21:21,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2452 transitions. [2023-01-27 22:21:21,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 58.38095238095238) internal successors, (2452), 42 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:21,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:21,010 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:21:21,010 INFO L175 Difference]: Start difference. First operand has 600 places, 2490 transitions, 80413 flow. Second operand 42 states and 2452 transitions. [2023-01-27 22:21:21,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 3310 transitions, 113383 flow [2023-01-27 22:22:00,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 3310 transitions, 111806 flow, removed 702 selfloop flow, removed 16 redundant places. [2023-01-27 22:22:00,174 INFO L231 Difference]: Finished difference. Result has 642 places, 2961 transitions, 103819 flow [2023-01-27 22:22:00,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=78997, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1645, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=103819, PETRI_PLACES=642, PETRI_TRANSITIONS=2961} [2023-01-27 22:22:00,177 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 622 predicate places. [2023-01-27 22:22:00,177 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 2961 transitions, 103819 flow [2023-01-27 22:22:00,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.88) internal successors, (1372), 25 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:00,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:22:00,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:22:00,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-01-27 22:22:00,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:00,381 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:22:00,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:22:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash 711617715, now seen corresponding path program 22 times [2023-01-27 22:22:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:22:00,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189664348] [2023-01-27 22:22:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:22:00,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:22:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:22:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:00,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:22:00,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189664348] [2023-01-27 22:22:00,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189664348] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:22:00,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258681537] [2023-01-27 22:22:00,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 22:22:00,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:22:00,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:22:00,573 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) [2023-01-27 22:22:00,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 22:22:00,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 22:22:00,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:22:00,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 22:22:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:22:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:00,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:22:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:22:01,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258681537] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:22:01,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:22:01,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-01-27 22:22:01,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345899216] [2023-01-27 22:22:01,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:22:01,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 22:22:01,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:22:01,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 22:22:01,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-01-27 22:22:01,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:22:01,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 2961 transitions, 103819 flow. Second operand has 21 states, 21 states have (on average 54.523809523809526) internal successors, (1145), 21 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:01,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:22:01,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:22:01,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:22:24,454 INFO L130 PetriNetUnfolder]: 9930/20241 cut-off events. [2023-01-27 22:22:24,454 INFO L131 PetriNetUnfolder]: For 2993229/2993229 co-relation queries the response was YES. [2023-01-27 22:22:24,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317929 conditions, 20241 events. 9930/20241 cut-off events. For 2993229/2993229 co-relation queries the response was YES. Maximal size of possible extension queue 1526. Compared 200367 event pairs, 811 based on Foata normal form. 98/20339 useless extension candidates. Maximal degree in co-relation 314607. Up to 4621 conditions per place. [2023-01-27 22:22:24,901 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1331 selfloop transitions, 2111 changer transitions 28/3470 dead transitions. [2023-01-27 22:22:24,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 3470 transitions, 128567 flow [2023-01-27 22:22:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-27 22:22:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-27 22:22:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2971 transitions. [2023-01-27 22:22:24,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41024578845622756 [2023-01-27 22:22:24,904 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2971 transitions. [2023-01-27 22:22:24,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2971 transitions. [2023-01-27 22:22:24,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:22:24,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2971 transitions. [2023-01-27 22:22:24,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 58.254901960784316) internal successors, (2971), 51 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:24,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 142.0) internal successors, (7384), 52 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:24,910 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 142.0) internal successors, (7384), 52 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:22:24,910 INFO L175 Difference]: Start difference. First operand has 642 places, 2961 transitions, 103819 flow. Second operand 51 states and 2971 transitions. [2023-01-27 22:22:24,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 3470 transitions, 128567 flow [2023-01-27 22:23:22,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 3470 transitions, 124772 flow, removed 1822 selfloop flow, removed 22 redundant places. [2023-01-27 22:23:22,393 INFO L231 Difference]: Finished difference. Result has 689 places, 3187 transitions, 118517 flow [2023-01-27 22:23:22,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=99708, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1878, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=951, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=118517, PETRI_PLACES=689, PETRI_TRANSITIONS=3187} [2023-01-27 22:23:22,395 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 669 predicate places. [2023-01-27 22:23:22,395 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 3187 transitions, 118517 flow [2023-01-27 22:23:22,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.523809523809526) internal successors, (1145), 21 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:22,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:23:22,395 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:23:22,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-27 22:23:22,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:23:22,600 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:23:22,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:23:22,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1611482839, now seen corresponding path program 23 times [2023-01-27 22:23:22,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:23:22,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316449272] [2023-01-27 22:23:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:23:22,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:23:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:23:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:23:22,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:23:22,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316449272] [2023-01-27 22:23:22,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316449272] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:23:22,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780136724] [2023-01-27 22:23:22,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 22:23:22,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:23:22,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:23:22,764 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) [2023-01-27 22:23:22,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 22:23:22,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 22:23:22,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:23:22,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-27 22:23:22,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:23:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:23:23,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:23:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:23:26,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780136724] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:23:26,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:23:26,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-27 22:23:26,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129951047] [2023-01-27 22:23:26,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:23:26,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 22:23:26,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:23:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 22:23:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-01-27 22:23:26,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:23:26,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 3187 transitions, 118517 flow. Second operand has 19 states, 19 states have (on average 54.73684210526316) internal successors, (1040), 19 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:26,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:23:26,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:23:26,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:23:57,793 INFO L130 PetriNetUnfolder]: 10248/20703 cut-off events. [2023-01-27 22:23:57,793 INFO L131 PetriNetUnfolder]: For 3172050/3172050 co-relation queries the response was YES. [2023-01-27 22:23:58,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333158 conditions, 20703 events. 10248/20703 cut-off events. For 3172050/3172050 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 204160 event pairs, 1516 based on Foata normal form. 206/20909 useless extension candidates. Maximal degree in co-relation 330157. Up to 7377 conditions per place. [2023-01-27 22:23:58,300 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 1778 selfloop transitions, 1770 changer transitions 34/3582 dead transitions. [2023-01-27 22:23:58,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 3582 transitions, 137622 flow [2023-01-27 22:23:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-27 22:23:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-01-27 22:23:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2513 transitions. [2023-01-27 22:23:58,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115623976416639 [2023-01-27 22:23:58,303 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2513 transitions. [2023-01-27 22:23:58,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2513 transitions. [2023-01-27 22:23:58,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:23:58,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2513 transitions. [2023-01-27 22:23:58,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 58.44186046511628) internal successors, (2513), 43 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:58,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 142.0) internal successors, (6248), 44 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:58,308 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 142.0) internal successors, (6248), 44 states have internal predecessors, (6248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:23:58,308 INFO L175 Difference]: Start difference. First operand has 689 places, 3187 transitions, 118517 flow. Second operand 43 states and 2513 transitions. [2023-01-27 22:23:58,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 3582 transitions, 137622 flow [2023-01-27 22:25:04,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 710 places, 3582 transitions, 132557 flow, removed 2010 selfloop flow, removed 19 redundant places. [2023-01-27 22:25:04,094 INFO L231 Difference]: Finished difference. Result has 726 places, 3369 transitions, 127571 flow [2023-01-27 22:25:04,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=114055, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1578, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=127571, PETRI_PLACES=726, PETRI_TRANSITIONS=3369} [2023-01-27 22:25:04,097 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 706 predicate places. [2023-01-27 22:25:04,097 INFO L495 AbstractCegarLoop]: Abstraction has has 726 places, 3369 transitions, 127571 flow [2023-01-27 22:25:04,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.73684210526316) internal successors, (1040), 19 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:25:04,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:25:04,097 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:25:04,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 22:25:04,302 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,SelfDestructingSolverStorable25 [2023-01-27 22:25:04,302 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:25:04,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:25:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash 945912141, now seen corresponding path program 24 times [2023-01-27 22:25:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:25:04,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027252817] [2023-01-27 22:25:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:25:04,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:25:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:25:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:25:04,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:25:04,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027252817] [2023-01-27 22:25:04,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027252817] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:25:04,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529066499] [2023-01-27 22:25:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 22:25:04,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:25:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:25:04,478 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) [2023-01-27 22:25:04,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 22:25:04,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 22:25:04,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:25:04,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-27 22:25:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:25:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:25:04,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:25:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:25:04,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529066499] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:25:04,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:25:04,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-27 22:25:04,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503282346] [2023-01-27 22:25:04,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:25:04,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 22:25:04,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:25:04,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 22:25:04,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-27 22:25:04,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:25:04,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 726 places, 3369 transitions, 127571 flow. Second operand has 20 states, 20 states have (on average 54.95) internal successors, (1099), 20 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:25:04,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:25:04,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:25:04,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:25:36,682 INFO L130 PetriNetUnfolder]: 10530/21178 cut-off events. [2023-01-27 22:25:36,682 INFO L131 PetriNetUnfolder]: For 3412649/3412649 co-relation queries the response was YES. [2023-01-27 22:25:37,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345899 conditions, 21178 events. 10530/21178 cut-off events. For 3412649/3412649 co-relation queries the response was YES. Maximal size of possible extension queue 1583. Compared 208350 event pairs, 1400 based on Foata normal form. 164/21342 useless extension candidates. Maximal degree in co-relation 344979. Up to 19569 conditions per place. [2023-01-27 22:25:37,410 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 3306 selfloop transitions, 335 changer transitions 13/3654 dead transitions. [2023-01-27 22:25:37,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 3654 transitions, 142751 flow [2023-01-27 22:25:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-27 22:25:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-27 22:25:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2465 transitions. [2023-01-27 22:25:37,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41331321260898723 [2023-01-27 22:25:37,412 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2465 transitions. [2023-01-27 22:25:37,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2465 transitions. [2023-01-27 22:25:37,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:25:37,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2465 transitions. [2023-01-27 22:25:37,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 58.69047619047619) internal successors, (2465), 42 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:25:37,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:25:37,417 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:25:37,417 INFO L175 Difference]: Start difference. First operand has 726 places, 3369 transitions, 127571 flow. Second operand 42 states and 2465 transitions. [2023-01-27 22:25:37,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 3654 transitions, 142751 flow [2023-01-27 22:26:51,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 3654 transitions, 141152 flow, removed 617 selfloop flow, removed 13 redundant places. [2023-01-27 22:26:51,479 INFO L231 Difference]: Finished difference. Result has 766 places, 3485 transitions, 131658 flow [2023-01-27 22:26:51,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=125917, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=131658, PETRI_PLACES=766, PETRI_TRANSITIONS=3485} [2023-01-27 22:26:51,481 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 746 predicate places. [2023-01-27 22:26:51,481 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 3485 transitions, 131658 flow [2023-01-27 22:26:51,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.95) internal successors, (1099), 20 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:26:51,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:26:51,482 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:26:51,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-01-27 22:26:51,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 22:26:51,687 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:26:51,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:26:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1790286989, now seen corresponding path program 25 times [2023-01-27 22:26:51,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:26:51,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917434399] [2023-01-27 22:26:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:26:51,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:26:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:26:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:26:51,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:26:51,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917434399] [2023-01-27 22:26:51,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917434399] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:26:51,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454192142] [2023-01-27 22:26:51,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 22:26:51,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:26:51,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:26:51,871 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) [2023-01-27 22:26:51,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 22:26:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:26:51,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 22:26:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:26:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:26:52,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 22:26:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:26:52,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454192142] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 22:26:52,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 22:26:52,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-01-27 22:26:52,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515448509] [2023-01-27 22:26:52,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 22:26:52,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 22:26:52,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:26:52,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 22:26:52,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-01-27 22:26:52,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-27 22:26:52,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 3485 transitions, 131658 flow. Second operand has 21 states, 21 states have (on average 54.80952380952381) internal successors, (1151), 21 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:26:52,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:26:52,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-27 22:26:52,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:27:31,249 INFO L130 PetriNetUnfolder]: 11284/22816 cut-off events. [2023-01-27 22:27:31,250 INFO L131 PetriNetUnfolder]: For 4258321/4258321 co-relation queries the response was YES. [2023-01-27 22:27:31,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385219 conditions, 22816 events. 11284/22816 cut-off events. For 4258321/4258321 co-relation queries the response was YES. Maximal size of possible extension queue 1731. Compared 228725 event pairs, 1873 based on Foata normal form. 60/22876 useless extension candidates. Maximal degree in co-relation 383849. Up to 11253 conditions per place. [2023-01-27 22:27:32,084 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 1995 selfloop transitions, 1924 changer transitions 11/3930 dead transitions. [2023-01-27 22:27:32,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 3930 transitions, 155695 flow [2023-01-27 22:27:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 22:27:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 22:27:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1795 transitions. [2023-01-27 22:27:32,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213615023474178 [2023-01-27 22:27:32,087 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1795 transitions. [2023-01-27 22:27:32,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1795 transitions. [2023-01-27 22:27:32,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:27:32,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1795 transitions. [2023-01-27 22:27:32,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 59.833333333333336) internal successors, (1795), 30 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:27:32,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:27:32,091 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:27:32,091 INFO L175 Difference]: Start difference. First operand has 766 places, 3485 transitions, 131658 flow. Second operand 30 states and 1795 transitions. [2023-01-27 22:27:32,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 3930 transitions, 155695 flow [2023-01-27 22:29:00,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 3930 transitions, 152825 flow, removed 1344 selfloop flow, removed 14 redundant places. [2023-01-27 22:29:00,186 INFO L231 Difference]: Finished difference. Result has 796 places, 3715 transitions, 146197 flow [2023-01-27 22:29:00,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=129916, PETRI_DIFFERENCE_MINUEND_PLACES=752, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1705, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=146197, PETRI_PLACES=796, PETRI_TRANSITIONS=3715} [2023-01-27 22:29:00,189 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 776 predicate places. [2023-01-27 22:29:00,189 INFO L495 AbstractCegarLoop]: Abstraction has has 796 places, 3715 transitions, 146197 flow [2023-01-27 22:29:00,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.80952380952381) internal successors, (1151), 21 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:29:00,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:29:00,189 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 22:29:00,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 22:29:00,394 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,SelfDestructingSolverStorable27 [2023-01-27 22:29:00,394 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 22:29:00,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:29:00,394 INFO L85 PathProgramCache]: Analyzing trace with hash 670916739, now seen corresponding path program 26 times [2023-01-27 22:29:00,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:29:00,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369266436] [2023-01-27 22:29:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:29:00,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:29:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:29:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:29:00,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:29:00,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369266436] [2023-01-27 22:29:00,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369266436] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:29:00,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415157185] [2023-01-27 22:29:00,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:29:00,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:29:00,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:29:00,576 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) [2023-01-27 22:29:00,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 22:29:00,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:29:00,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:29:00,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 22:29:00,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:29:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 22:29:00,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-01-27 22:29:10,663 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 [2023-01-27 22:29:10,663 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 22:29:10,919 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 22:29:10,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-01-27 22:29:11,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 22:29:11,120 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. [2023-01-27 22:29:11,121 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 22:29:11,121 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 22:29:11,121 INFO L445 BasicCegarLoop]: Path program histogram: [26, 2, 1] [2023-01-27 22:29:11,123 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 22:29:11,123 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 22:29:11,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 10:29:11 BasicIcfg [2023-01-27 22:29:11,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 22:29:11,125 INFO L158 Benchmark]: Toolchain (without parser) took 849217.84ms. Allocated memory was 329.3MB in the beginning and 5.7GB in the end (delta: 5.4GB). Free memory was 268.6MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2023-01-27 22:29:11,125 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 329.3MB. Free memory is still 276.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 22:29:11,125 INFO L158 Benchmark]: CACSL2BoogieTranslator took 142.44ms. Allocated memory is still 329.3MB. Free memory was 267.9MB in the beginning and 257.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 22:29:11,125 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.90ms. Allocated memory is still 329.3MB. Free memory was 257.4MB in the beginning and 256.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 22:29:11,125 INFO L158 Benchmark]: Boogie Preprocessor took 14.64ms. Allocated memory is still 329.3MB. Free memory was 256.0MB in the beginning and 254.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 22:29:11,126 INFO L158 Benchmark]: RCFGBuilder took 260.47ms. Allocated memory is still 329.3MB. Free memory was 254.6MB in the beginning and 239.9MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-27 22:29:11,126 INFO L158 Benchmark]: TraceAbstraction took 848776.42ms. Allocated memory was 329.3MB in the beginning and 5.7GB in the end (delta: 5.4GB). Free memory was 239.2MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2023-01-27 22:29:11,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 329.3MB. Free memory is still 276.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 142.44ms. Allocated memory is still 329.3MB. Free memory was 267.9MB in the beginning and 257.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 19.90ms. Allocated memory is still 329.3MB. Free memory was 257.4MB in the beginning and 256.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 14.64ms. Allocated memory is still 329.3MB. Free memory was 256.0MB in the beginning and 254.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 260.47ms. Allocated memory is still 329.3MB. Free memory was 254.6MB in the beginning and 239.9MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 848776.42ms. Allocated memory was 329.3MB in the beginning and 5.7GB in the end (delta: 5.4GB). Free memory was 239.2MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 70 PlacesBefore, 20 PlacesAfterwards, 69 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 63 TotalNumberOfCompositions, 443 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 436, independent: 434, independent conditional: 0, independent unconditional: 434, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 219, independent: 217, independent conditional: 0, independent unconditional: 217, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 436, independent: 217, independent conditional: 0, independent unconditional: 217, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 219, unknown conditional: 0, unknown unconditional: 219] , 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: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 91 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: 848.6s, OverallIterations: 29, TraceHistogramMax: 3, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 756.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 4610 SdHoareTripleChecker+Valid, 71.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4610 mSDsluCounter, 488 SdHoareTripleChecker+Invalid, 69.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 356 mSDsCounter, 876 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15348 IncrementalHoareTripleChecker+Invalid, 16234 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 876 mSolverCounterUnsat, 132 mSDtfsCounter, 15348 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2166 GetRequests, 1108 SyntacticMatches, 25 SemanticMatches, 1033 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14228 ImplicationChecksByTransitivity, 93.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146197occurred in iteration=28, InterpolantAutomatonStates: 844, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 72.0s InterpolantComputationTime, 911 NumberOfCodeBlocks, 910 NumberOfCodeBlocksAsserted, 85 NumberOfCheckSat, 1260 ConstructedInterpolants, 0 QuantifiedInterpolants, 11951 SizeOfPredicates, 203 NumberOfNonLiveVariables, 3223 ConjunctsInSsa, 363 ConjunctsInUnsatCore, 79 InterpolantComputations, 4 PerfectInterpolantSequences, 60/510 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