/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-difference-det.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:35:39,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:35:39,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:35:39,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:35:39,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:35:39,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:35:39,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:35:39,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:35:39,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:35:39,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:35:39,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:35:39,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:35:39,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:35:39,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:35:39,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:35:39,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:35:39,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:35:39,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:35:39,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:35:39,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:35:39,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:35:39,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:35:39,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:35:39,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:35:39,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:35:39,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 21:35:39,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 21:35:39,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 21:35:39,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 21:35:39,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 21:35:39,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 21:35:39,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 21:35:39,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 21:35:39,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:35:39,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:35:39,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:35:39,415 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 21:35:39,443 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:35:39,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:35:39,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:35:39,444 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:35:39,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:35:39,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:35:39,445 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:35:39,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:35:39,445 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:35:39,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:35:39,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:35:39,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:35:39,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:35:39,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:35:39,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:35:39,446 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:35:39,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:35:39,446 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:35:39,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:35:39,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:35:39,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:35:39,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:35:39,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:35:39,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:35:39,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:35:39,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:35:39,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:35:39,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:35:39,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:35:39,447 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:35:39,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:35:39,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:35:39,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:35:39,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:35:39,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:35:39,673 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:35:39,674 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:35:39,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-01-27 21:35:40,779 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:35:40,914 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:35:40,915 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-01-27 21:35:40,920 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9058222f7/bf1d68a726a849abbbaf1d7def1e65e1/FLAG3125916e1 [2023-01-27 21:35:40,930 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9058222f7/bf1d68a726a849abbbaf1d7def1e65e1 [2023-01-27 21:35:40,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:35:40,933 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:35:40,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:35:40,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:35:40,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:35:40,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:35:40" (1/1) ... [2023-01-27 21:35:40,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16369089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:40, skipping insertion in model container [2023-01-27 21:35:40,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:35:40" (1/1) ... [2023-01-27 21:35:40,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:35:40,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:35:41,099 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-difference-det.wvr.c[2507,2520] [2023-01-27 21:35:41,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:35:41,114 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:35:41,129 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-difference-det.wvr.c[2507,2520] [2023-01-27 21:35:41,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:35:41,134 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:35:41,135 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:35:41,140 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:35:41,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41 WrapperNode [2023-01-27 21:35:41,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:35:41,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:35:41,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:35:41,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:35:41,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,170 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2023-01-27 21:35:41,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:35:41,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:35:41,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:35:41,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:35:41,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,190 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:35:41,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:35:41,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:35:41,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:35:41,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (1/1) ... [2023-01-27 21:35:41,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:35:41,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:35:41,218 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 21:35:41,228 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 21:35:41,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:35:41,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:35:41,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:35:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:35:41,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:35:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 21:35:41,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 21:35:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-27 21:35:41,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-27 21:35:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:35:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:35:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:35:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:35:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:35:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:35:41,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:35:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:35:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:35:41,247 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 21:35:41,339 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:35:41,341 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:35:41,569 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:35:41,621 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:35:41,621 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-27 21:35:41,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:35:41 BoogieIcfgContainer [2023-01-27 21:35:41,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:35:41,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:35:41,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:35:41,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:35:41,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:35:40" (1/3) ... [2023-01-27 21:35:41,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42913c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:35:41, skipping insertion in model container [2023-01-27 21:35:41,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:35:41" (2/3) ... [2023-01-27 21:35:41,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42913c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:35:41, skipping insertion in model container [2023-01-27 21:35:41,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:35:41" (3/3) ... [2023-01-27 21:35:41,629 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-01-27 21:35:41,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:35:41,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:35:41,642 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:35:41,725 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 21:35:41,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 125 transitions, 282 flow [2023-01-27 21:35:41,817 INFO L130 PetriNetUnfolder]: 9/121 cut-off events. [2023-01-27 21:35:41,817 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:35:41,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 121 events. 9/121 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-01-27 21:35:41,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 125 transitions, 282 flow [2023-01-27 21:35:41,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 109 transitions, 242 flow [2023-01-27 21:35:41,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:35:41,839 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 109 transitions, 242 flow [2023-01-27 21:35:41,841 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 109 transitions, 242 flow [2023-01-27 21:35:41,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 109 transitions, 242 flow [2023-01-27 21:35:41,872 INFO L130 PetriNetUnfolder]: 9/109 cut-off events. [2023-01-27 21:35:41,872 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:35:41,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 109 events. 9/109 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-01-27 21:35:41,876 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-01-27 21:35:44,914 INFO L134 LiptonReduction]: Checked pairs total: 2650 [2023-01-27 21:35:44,914 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-01-27 21:35:44,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:35:44,931 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;@4a3f0897, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:35:44,931 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 21:35:44,937 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2023-01-27 21:35:44,937 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:35:44,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:44,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:44,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:44,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2017117140, now seen corresponding path program 1 times [2023-01-27 21:35:44,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:44,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157207630] [2023-01-27 21:35:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:44,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:45,352 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 21:35:45,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157207630] [2023-01-27 21:35:45,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157207630] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:35:45,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:35:45,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 21:35:45,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238193629] [2023-01-27 21:35:45,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:35:45,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:35:45,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:45,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:35:45,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:35:45,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 212 [2023-01-27 21:35:45,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 21:35:45,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:45,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 212 [2023-01-27 21:35:45,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:45,686 INFO L130 PetriNetUnfolder]: 1537/1954 cut-off events. [2023-01-27 21:35:45,686 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-01-27 21:35:45,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 1954 events. 1537/1954 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6416 event pairs, 141 based on Foata normal form. 1/1135 useless extension candidates. Maximal degree in co-relation 3091. Up to 1733 conditions per place. [2023-01-27 21:35:45,699 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-01-27 21:35:45,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 241 flow [2023-01-27 21:35:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:35:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:35:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-01-27 21:35:45,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2023-01-27 21:35:45,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-01-27 21:35:45,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-01-27 21:35:45,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:45,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-01-27 21:35:45,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 21:35:45,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states 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 21:35:45,723 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states 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 21:35:45,724 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 360 transitions. [2023-01-27 21:35:45,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 241 flow [2023-01-27 21:35:45,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 51 transitions, 211 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-27 21:35:45,730 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 99 flow [2023-01-27 21:35:45,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-01-27 21:35:45,734 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-01-27 21:35:45,734 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 99 flow [2023-01-27 21:35:45,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 21:35:45,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:45,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:45,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:35:45,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:45,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1386775174, now seen corresponding path program 1 times [2023-01-27 21:35:45,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:45,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16173758] [2023-01-27 21:35:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:45,848 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 21:35:45,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:45,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16173758] [2023-01-27 21:35:45,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16173758] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:35:45,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:35:45,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:35:45,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364918308] [2023-01-27 21:35:45,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:35:45,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:35:45,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:35:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:35:45,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:45,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:35:45,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:45,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:45,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:46,141 INFO L130 PetriNetUnfolder]: 2495/3283 cut-off events. [2023-01-27 21:35:46,142 INFO L131 PetriNetUnfolder]: For 972/972 co-relation queries the response was YES. [2023-01-27 21:35:46,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8050 conditions, 3283 events. 2495/3283 cut-off events. For 972/972 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13635 event pairs, 520 based on Foata normal form. 48/3311 useless extension candidates. Maximal degree in co-relation 2873. Up to 1616 conditions per place. [2023-01-27 21:35:46,161 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 84 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-01-27 21:35:46,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 91 transitions, 452 flow [2023-01-27 21:35:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:35:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:35:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-01-27 21:35:46,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216981132075472 [2023-01-27 21:35:46,167 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-01-27 21:35:46,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-01-27 21:35:46,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:46,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-01-27 21:35:46,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 21:35:46,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:46,174 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:46,174 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 99 flow. Second operand 5 states and 553 transitions. [2023-01-27 21:35:46,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 91 transitions, 452 flow [2023-01-27 21:35:46,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 91 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:35:46,178 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 129 flow [2023-01-27 21:35:46,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-01-27 21:35:46,179 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-01-27 21:35:46,179 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 129 flow [2023-01-27 21:35:46,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:35:46,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:46,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:46,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:35:46,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:46,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash -418684095, now seen corresponding path program 1 times [2023-01-27 21:35:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:46,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198959973] [2023-01-27 21:35:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:46,330 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 21:35:46,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:46,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198959973] [2023-01-27 21:35:46,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198959973] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:35:46,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960435157] [2023-01-27 21:35:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:46,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:35:46,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:35:46,341 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 21:35:46,350 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 21:35:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:46,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 21:35:46,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:35:46,540 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 21:35:46,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:35:46,575 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 21:35:46,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960435157] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:35:46,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:35:46,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-27 21:35:46,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083728833] [2023-01-27 21:35:46,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:35:46,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 21:35:46,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:46,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 21:35:46,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-27 21:35:46,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:46,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 129 flow. Second operand has 8 states, 8 states have (on average 98.75) internal successors, (790), 8 states have internal predecessors, (790), 0 states have call successors, (0), 0 states 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 21:35:46,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:46,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:46,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:47,113 INFO L130 PetriNetUnfolder]: 3361/4509 cut-off events. [2023-01-27 21:35:47,113 INFO L131 PetriNetUnfolder]: For 3715/4180 co-relation queries the response was YES. [2023-01-27 21:35:47,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12634 conditions, 4509 events. 3361/4509 cut-off events. For 3715/4180 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 20174 event pairs, 707 based on Foata normal form. 570/5006 useless extension candidates. Maximal degree in co-relation 8079. Up to 1944 conditions per place. [2023-01-27 21:35:47,139 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 89 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-01-27 21:35:47,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 97 transitions, 532 flow [2023-01-27 21:35:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:35:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:35:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 555 transitions. [2023-01-27 21:35:47,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2023-01-27 21:35:47,142 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 555 transitions. [2023-01-27 21:35:47,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 555 transitions. [2023-01-27 21:35:47,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:47,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 555 transitions. [2023-01-27 21:35:47,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states 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 21:35:47,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:47,146 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:47,146 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 129 flow. Second operand 5 states and 555 transitions. [2023-01-27 21:35:47,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 97 transitions, 532 flow [2023-01-27 21:35:47,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 97 transitions, 513 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 21:35:47,156 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 159 flow [2023-01-27 21:35:47,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-01-27 21:35:47,157 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-01-27 21:35:47,157 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 159 flow [2023-01-27 21:35:47,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.75) internal successors, (790), 8 states have internal predecessors, (790), 0 states have call successors, (0), 0 states 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 21:35:47,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:47,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:47,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 21:35:47,364 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 21:35:47,364 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:47,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1510344313, now seen corresponding path program 1 times [2023-01-27 21:35:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:47,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028168458] [2023-01-27 21:35:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:47,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:47,444 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 21:35:47,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:47,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028168458] [2023-01-27 21:35:47,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028168458] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:35:47,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493894524] [2023-01-27 21:35:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:47,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:35:47,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:35:47,447 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 21:35:47,470 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 21:35:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:47,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 21:35:47,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:35:47,582 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 21:35:47,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:35:47,610 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 21:35:47,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493894524] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:35:47,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:35:47,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-27 21:35:47,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231620197] [2023-01-27 21:35:47,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:35:47,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 21:35:47,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 21:35:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-27 21:35:47,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:47,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 99.625) internal successors, (797), 8 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 21:35:47,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:47,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:47,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:48,069 INFO L130 PetriNetUnfolder]: 3413/4567 cut-off events. [2023-01-27 21:35:48,069 INFO L131 PetriNetUnfolder]: For 5980/6404 co-relation queries the response was YES. [2023-01-27 21:35:48,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14384 conditions, 4567 events. 3413/4567 cut-off events. For 5980/6404 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20233 event pairs, 479 based on Foata normal form. 512/5013 useless extension candidates. Maximal degree in co-relation 11186. Up to 2034 conditions per place. [2023-01-27 21:35:48,092 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 88 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2023-01-27 21:35:48,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 96 transitions, 573 flow [2023-01-27 21:35:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:35:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:35:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-01-27 21:35:48,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216981132075472 [2023-01-27 21:35:48,095 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-01-27 21:35:48,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-01-27 21:35:48,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:48,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-01-27 21:35:48,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 21:35:48,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:48,099 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:48,099 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 159 flow. Second operand 5 states and 553 transitions. [2023-01-27 21:35:48,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 96 transitions, 573 flow [2023-01-27 21:35:48,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 96 transitions, 564 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-27 21:35:48,111 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 188 flow [2023-01-27 21:35:48,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-01-27 21:35:48,112 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-01-27 21:35:48,112 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 188 flow [2023-01-27 21:35:48,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.625) internal successors, (797), 8 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 21:35:48,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:48,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:48,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 21:35:48,318 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 21:35:48,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:48,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:48,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1953734941, now seen corresponding path program 2 times [2023-01-27 21:35:48,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:48,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173064103] [2023-01-27 21:35:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:48,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:48,400 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 21:35:48,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:48,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173064103] [2023-01-27 21:35:48,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173064103] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:35:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904180396] [2023-01-27 21:35:48,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:35:48,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:35:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:35:48,402 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 21:35:48,429 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 21:35:48,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:35:48,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:35:48,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 21:35:48,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:35:48,569 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 21:35:48,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:35:48,602 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 21:35:48,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904180396] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:35:48,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:35:48,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-27 21:35:48,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384354657] [2023-01-27 21:35:48,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:35:48,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 21:35:48,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 21:35:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-01-27 21:35:48,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:48,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 188 flow. Second operand has 10 states, 10 states have (on average 99.7) internal successors, (997), 10 states have internal predecessors, (997), 0 states have call successors, (0), 0 states 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 21:35:48,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:48,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:48,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:49,303 INFO L130 PetriNetUnfolder]: 5065/6869 cut-off events. [2023-01-27 21:35:49,304 INFO L131 PetriNetUnfolder]: For 13799/14765 co-relation queries the response was YES. [2023-01-27 21:35:49,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23179 conditions, 6869 events. 5065/6869 cut-off events. For 13799/14765 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 33838 event pairs, 649 based on Foata normal form. 1068/7721 useless extension candidates. Maximal degree in co-relation 16109. Up to 2724 conditions per place. [2023-01-27 21:35:49,342 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 149 selfloop transitions, 13 changer transitions 0/166 dead transitions. [2023-01-27 21:35:49,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 166 transitions, 1054 flow [2023-01-27 21:35:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:35:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:35:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 891 transitions. [2023-01-27 21:35:49,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253537735849056 [2023-01-27 21:35:49,346 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 891 transitions. [2023-01-27 21:35:49,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 891 transitions. [2023-01-27 21:35:49,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:49,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 891 transitions. [2023-01-27 21:35:49,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.375) internal successors, (891), 8 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 21:35:49,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states 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 21:35:49,353 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states 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 21:35:49,353 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 188 flow. Second operand 8 states and 891 transitions. [2023-01-27 21:35:49,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 166 transitions, 1054 flow [2023-01-27 21:35:49,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 166 transitions, 1012 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-01-27 21:35:49,372 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 281 flow [2023-01-27 21:35:49,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=281, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-01-27 21:35:49,373 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-01-27 21:35:49,373 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 281 flow [2023-01-27 21:35:49,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.7) internal successors, (997), 10 states have internal predecessors, (997), 0 states have call successors, (0), 0 states 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 21:35:49,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:49,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:49,379 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 21:35:49,576 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 21:35:49,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:49,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1707640579, now seen corresponding path program 2 times [2023-01-27 21:35:49,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:49,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795084186] [2023-01-27 21:35:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:49,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:49,661 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 21:35:49,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:49,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795084186] [2023-01-27 21:35:49,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795084186] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:35:49,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941110564] [2023-01-27 21:35:49,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:35:49,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:35:49,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:35:49,666 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 21:35:49,668 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 21:35:49,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:35:49,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:35:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 21:35:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:35:49,804 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 21:35:49,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:35:49,830 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 21:35:49,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941110564] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:35:49,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:35:49,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-27 21:35:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837821487] [2023-01-27 21:35:49,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:35:49,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 21:35:49,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 21:35:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-01-27 21:35:49,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:49,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 281 flow. Second operand has 10 states, 10 states have (on average 98.3) internal successors, (983), 10 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 21:35:49,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:49,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:49,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:50,797 INFO L130 PetriNetUnfolder]: 8404/11264 cut-off events. [2023-01-27 21:35:50,798 INFO L131 PetriNetUnfolder]: For 34345/36956 co-relation queries the response was YES. [2023-01-27 21:35:50,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43194 conditions, 11264 events. 8404/11264 cut-off events. For 34345/36956 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 57068 event pairs, 736 based on Foata normal form. 951/11972 useless extension candidates. Maximal degree in co-relation 36360. Up to 4803 conditions per place. [2023-01-27 21:35:50,865 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 175 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2023-01-27 21:35:50,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 193 transitions, 1524 flow [2023-01-27 21:35:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:35:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:35:50,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 885 transitions. [2023-01-27 21:35:50,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218160377358491 [2023-01-27 21:35:50,868 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 885 transitions. [2023-01-27 21:35:50,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 885 transitions. [2023-01-27 21:35:50,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:50,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 885 transitions. [2023-01-27 21:35:50,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 110.625) internal successors, (885), 8 states have internal predecessors, (885), 0 states have call successors, (0), 0 states 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 21:35:50,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states 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 21:35:50,874 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 212.0) internal successors, (1908), 9 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states 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 21:35:50,874 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 281 flow. Second operand 8 states and 885 transitions. [2023-01-27 21:35:50,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 193 transitions, 1524 flow [2023-01-27 21:35:50,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 193 transitions, 1424 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-01-27 21:35:50,939 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 370 flow [2023-01-27 21:35:50,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=370, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-01-27 21:35:50,941 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 28 predicate places. [2023-01-27 21:35:50,941 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 370 flow [2023-01-27 21:35:50,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.3) internal successors, (983), 10 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 21:35:50,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:50,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:50,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 21:35:51,147 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 21:35:51,147 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:51,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:51,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2076753269, now seen corresponding path program 3 times [2023-01-27 21:35:51,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:51,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781797929] [2023-01-27 21:35:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:51,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:51,220 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 21:35:51,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:51,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781797929] [2023-01-27 21:35:51,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781797929] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:35:51,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132346284] [2023-01-27 21:35:51,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:35:51,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:35:51,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:35:51,222 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 21:35:51,242 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 21:35:51,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:35:51,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:35:51,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 21:35:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:35:51,369 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 21:35:51,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:35:51,398 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 21:35:51,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132346284] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:35:51,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:35:51,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-27 21:35:51,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565510946] [2023-01-27 21:35:51,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:35:51,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 21:35:51,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 21:35:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-27 21:35:51,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:51,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 99.7) internal successors, (997), 10 states have internal predecessors, (997), 0 states have call successors, (0), 0 states 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 21:35:51,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:51,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:51,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:52,587 INFO L130 PetriNetUnfolder]: 10652/14308 cut-off events. [2023-01-27 21:35:52,587 INFO L131 PetriNetUnfolder]: For 57338/60554 co-relation queries the response was YES. [2023-01-27 21:35:52,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60004 conditions, 14308 events. 10652/14308 cut-off events. For 57338/60554 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 76201 event pairs, 2167 based on Foata normal form. 1607/15471 useless extension candidates. Maximal degree in co-relation 50602. Up to 6486 conditions per place. [2023-01-27 21:35:52,678 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 125 selfloop transitions, 16 changer transitions 0/146 dead transitions. [2023-01-27 21:35:52,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 146 transitions, 1196 flow [2023-01-27 21:35:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:35:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:35:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2023-01-27 21:35:52,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2023-01-27 21:35:52,680 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2023-01-27 21:35:52,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2023-01-27 21:35:52,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:52,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2023-01-27 21:35:52,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 21:35:52,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:52,684 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:52,684 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 370 flow. Second operand 5 states and 560 transitions. [2023-01-27 21:35:52,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 146 transitions, 1196 flow [2023-01-27 21:35:52,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 146 transitions, 1146 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-27 21:35:52,805 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 473 flow [2023-01-27 21:35:52,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=473, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2023-01-27 21:35:52,806 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-01-27 21:35:52,806 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 473 flow [2023-01-27 21:35:52,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.7) internal successors, (997), 10 states have internal predecessors, (997), 0 states have call successors, (0), 0 states 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 21:35:52,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:52,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:52,819 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 21:35:53,019 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 21:35:53,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:53,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1065793488, now seen corresponding path program 1 times [2023-01-27 21:35:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:53,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603908925] [2023-01-27 21:35:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:53,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:53,154 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 21:35:53,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603908925] [2023-01-27 21:35:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603908925] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:35:53,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:35:53,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:35:53,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282899795] [2023-01-27 21:35:53,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:35:53,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:35:53,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:35:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:35:53,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:53,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:35:53,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:53,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:53,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:54,239 INFO L130 PetriNetUnfolder]: 11094/14850 cut-off events. [2023-01-27 21:35:54,239 INFO L131 PetriNetUnfolder]: For 61372/64597 co-relation queries the response was YES. [2023-01-27 21:35:54,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65847 conditions, 14850 events. 11094/14850 cut-off events. For 61372/64597 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 79472 event pairs, 971 based on Foata normal form. 1644/16054 useless extension candidates. Maximal degree in co-relation 56268. Up to 7770 conditions per place. [2023-01-27 21:35:54,338 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 115 selfloop transitions, 15 changer transitions 0/135 dead transitions. [2023-01-27 21:35:54,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 1180 flow [2023-01-27 21:35:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:35:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:35:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 547 transitions. [2023-01-27 21:35:54,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160377358490567 [2023-01-27 21:35:54,341 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 547 transitions. [2023-01-27 21:35:54,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 547 transitions. [2023-01-27 21:35:54,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:54,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 547 transitions. [2023-01-27 21:35:54,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.4) internal successors, (547), 5 states have internal predecessors, (547), 0 states have call successors, (0), 0 states 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 21:35:54,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:54,345 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:54,345 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 473 flow. Second operand 5 states and 547 transitions. [2023-01-27 21:35:54,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 1180 flow [2023-01-27 21:35:54,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 1154 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-01-27 21:35:54,588 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 525 flow [2023-01-27 21:35:54,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-01-27 21:35:54,589 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 38 predicate places. [2023-01-27 21:35:54,589 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 525 flow [2023-01-27 21:35:54,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:35:54,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:54,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:54,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 21:35:54,590 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:54,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:54,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1179771516, now seen corresponding path program 2 times [2023-01-27 21:35:54,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:54,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970540037] [2023-01-27 21:35:54,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:54,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:54,654 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 21:35:54,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:54,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970540037] [2023-01-27 21:35:54,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970540037] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:35:54,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:35:54,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:35:54,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776736233] [2023-01-27 21:35:54,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:35:54,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:35:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:54,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:35:54,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:35:54,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:54,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 525 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:35:54,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:54,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:54,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:55,681 INFO L130 PetriNetUnfolder]: 9512/12930 cut-off events. [2023-01-27 21:35:55,681 INFO L131 PetriNetUnfolder]: For 70712/74116 co-relation queries the response was YES. [2023-01-27 21:35:55,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58319 conditions, 12930 events. 9512/12930 cut-off events. For 70712/74116 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 68496 event pairs, 2404 based on Foata normal form. 1498/14218 useless extension candidates. Maximal degree in co-relation 54145. Up to 7286 conditions per place. [2023-01-27 21:35:55,750 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 141 selfloop transitions, 11 changer transitions 0/158 dead transitions. [2023-01-27 21:35:55,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 158 transitions, 1568 flow [2023-01-27 21:35:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:35:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:35:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 556 transitions. [2023-01-27 21:35:55,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5245283018867924 [2023-01-27 21:35:55,753 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 556 transitions. [2023-01-27 21:35:55,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 556 transitions. [2023-01-27 21:35:55,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:55,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 556 transitions. [2023-01-27 21:35:55,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 21:35:55,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:55,756 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:55,756 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 525 flow. Second operand 5 states and 556 transitions. [2023-01-27 21:35:55,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 158 transitions, 1568 flow [2023-01-27 21:35:55,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 158 transitions, 1508 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-27 21:35:55,883 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 547 flow [2023-01-27 21:35:55,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=547, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2023-01-27 21:35:55,884 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-01-27 21:35:55,884 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 547 flow [2023-01-27 21:35:55,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:35:55,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:55,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:55,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 21:35:55,884 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:55,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1826686174, now seen corresponding path program 2 times [2023-01-27 21:35:55,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:55,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454882232] [2023-01-27 21:35:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:55,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:55,939 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 21:35:55,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:55,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454882232] [2023-01-27 21:35:55,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454882232] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:35:55,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:35:55,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:35:55,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323251960] [2023-01-27 21:35:55,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:35:55,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:35:55,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:55,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:35:55,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:35:55,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:55,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 547 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:35:55,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:55,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:55,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:57,192 INFO L130 PetriNetUnfolder]: 10846/14650 cut-off events. [2023-01-27 21:35:57,192 INFO L131 PetriNetUnfolder]: For 77876/81912 co-relation queries the response was YES. [2023-01-27 21:35:57,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68476 conditions, 14650 events. 10846/14650 cut-off events. For 77876/81912 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 80807 event pairs, 2073 based on Foata normal form. 1808/16120 useless extension candidates. Maximal degree in co-relation 58877. Up to 7788 conditions per place. [2023-01-27 21:35:57,282 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 145 selfloop transitions, 12 changer transitions 2/164 dead transitions. [2023-01-27 21:35:57,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 164 transitions, 1513 flow [2023-01-27 21:35:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:35:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:35:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 557 transitions. [2023-01-27 21:35:57,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254716981132076 [2023-01-27 21:35:57,285 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 557 transitions. [2023-01-27 21:35:57,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 557 transitions. [2023-01-27 21:35:57,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:57,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 557 transitions. [2023-01-27 21:35:57,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 21:35:57,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:57,289 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:57,289 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 547 flow. Second operand 5 states and 557 transitions. [2023-01-27 21:35:57,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 164 transitions, 1513 flow [2023-01-27 21:35:57,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 164 transitions, 1427 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-01-27 21:35:57,433 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 578 flow [2023-01-27 21:35:57,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=578, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2023-01-27 21:35:57,433 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2023-01-27 21:35:57,434 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 578 flow [2023-01-27 21:35:57,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:35:57,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:57,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:57,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 21:35:57,434 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:57,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:57,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1678969827, now seen corresponding path program 3 times [2023-01-27 21:35:57,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:57,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021615667] [2023-01-27 21:35:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:57,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:57,498 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 21:35:57,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:57,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021615667] [2023-01-27 21:35:57,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021615667] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:35:57,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150209172] [2023-01-27 21:35:57,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:35:57,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:35:57,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:35:57,500 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 21:35:57,509 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 21:35:57,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:35:57,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:35:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 21:35:57,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:35:57,651 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 21:35:57,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:35:57,679 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 21:35:57,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150209172] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:35:57,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:35:57,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-27 21:35:57,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33980464] [2023-01-27 21:35:57,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:35:57,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 21:35:57,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:57,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 21:35:57,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-27 21:35:57,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:57,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 578 flow. Second operand has 10 states, 10 states have (on average 98.7) internal successors, (987), 10 states have internal predecessors, (987), 0 states have call successors, (0), 0 states 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 21:35:57,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:57,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:57,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:35:59,103 INFO L130 PetriNetUnfolder]: 12722/17437 cut-off events. [2023-01-27 21:35:59,104 INFO L131 PetriNetUnfolder]: For 95235/100050 co-relation queries the response was YES. [2023-01-27 21:35:59,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82937 conditions, 17437 events. 12722/17437 cut-off events. For 95235/100050 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 97111 event pairs, 3252 based on Foata normal form. 2507/19640 useless extension candidates. Maximal degree in co-relation 78353. Up to 8886 conditions per place. [2023-01-27 21:35:59,335 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 146 selfloop transitions, 17 changer transitions 0/170 dead transitions. [2023-01-27 21:35:59,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 170 transitions, 1757 flow [2023-01-27 21:35:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:35:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:35:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-01-27 21:35:59,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226415094339623 [2023-01-27 21:35:59,340 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-01-27 21:35:59,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-01-27 21:35:59,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:35:59,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-01-27 21:35:59,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states 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 21:35:59,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:59,343 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:35:59,344 INFO L175 Difference]: Start difference. First operand has 83 places, 70 transitions, 578 flow. Second operand 5 states and 554 transitions. [2023-01-27 21:35:59,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 170 transitions, 1757 flow [2023-01-27 21:35:59,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1685 flow, removed 23 selfloop flow, removed 1 redundant places. [2023-01-27 21:35:59,544 INFO L231 Difference]: Finished difference. Result has 89 places, 77 transitions, 676 flow [2023-01-27 21:35:59,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=676, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2023-01-27 21:35:59,544 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-01-27 21:35:59,544 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 676 flow [2023-01-27 21:35:59,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 98.7) internal successors, (987), 10 states have internal predecessors, (987), 0 states have call successors, (0), 0 states 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 21:35:59,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:35:59,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:35:59,551 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 21:35:59,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:35:59,751 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:35:59,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:35:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1635530536, now seen corresponding path program 3 times [2023-01-27 21:35:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:35:59,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80777957] [2023-01-27 21:35:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:35:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:35:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:35:59,807 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 21:35:59,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:35:59,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80777957] [2023-01-27 21:35:59,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80777957] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:35:59,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:35:59,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:35:59,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681824278] [2023-01-27 21:35:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:35:59,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:35:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:35:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:35:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:35:59,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:35:59,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:35:59,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:35:59,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:35:59,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:01,274 INFO L130 PetriNetUnfolder]: 11930/16332 cut-off events. [2023-01-27 21:36:01,274 INFO L131 PetriNetUnfolder]: For 107941/112532 co-relation queries the response was YES. [2023-01-27 21:36:01,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81495 conditions, 16332 events. 11930/16332 cut-off events. For 107941/112532 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 93538 event pairs, 3390 based on Foata normal form. 2076/18144 useless extension candidates. Maximal degree in co-relation 66105. Up to 8704 conditions per place. [2023-01-27 21:36:01,378 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 154 selfloop transitions, 16 changer transitions 2/178 dead transitions. [2023-01-27 21:36:01,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 178 transitions, 1746 flow [2023-01-27 21:36:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:36:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:36:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2023-01-27 21:36:01,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2023-01-27 21:36:01,380 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2023-01-27 21:36:01,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2023-01-27 21:36:01,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:01,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2023-01-27 21:36:01,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 21:36:01,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:01,383 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:01,383 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 676 flow. Second operand 5 states and 560 transitions. [2023-01-27 21:36:01,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 178 transitions, 1746 flow [2023-01-27 21:36:01,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 178 transitions, 1700 flow, removed 23 selfloop flow, removed 0 redundant places. [2023-01-27 21:36:01,551 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 722 flow [2023-01-27 21:36:01,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=722, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2023-01-27 21:36:01,552 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2023-01-27 21:36:01,552 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 722 flow [2023-01-27 21:36:01,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:01,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:01,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:01,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 21:36:01,553 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:01,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash 439687930, now seen corresponding path program 4 times [2023-01-27 21:36:01,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:01,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300294094] [2023-01-27 21:36:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:01,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:01,605 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 21:36:01,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:01,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300294094] [2023-01-27 21:36:01,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300294094] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:36:01,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:36:01,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:36:01,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473359954] [2023-01-27 21:36:01,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:36:01,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:36:01,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:01,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:36:01,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:36:01,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:01,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 722 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:01,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:01,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:01,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:02,922 INFO L130 PetriNetUnfolder]: 12388/16950 cut-off events. [2023-01-27 21:36:02,922 INFO L131 PetriNetUnfolder]: For 111307/115949 co-relation queries the response was YES. [2023-01-27 21:36:02,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86451 conditions, 16950 events. 12388/16950 cut-off events. For 111307/115949 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 95622 event pairs, 3634 based on Foata normal form. 1900/18564 useless extension candidates. Maximal degree in co-relation 76477. Up to 8836 conditions per place. [2023-01-27 21:36:03,018 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 155 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2023-01-27 21:36:03,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 176 transitions, 1769 flow [2023-01-27 21:36:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:36:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:36:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 556 transitions. [2023-01-27 21:36:03,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5245283018867924 [2023-01-27 21:36:03,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 556 transitions. [2023-01-27 21:36:03,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 556 transitions. [2023-01-27 21:36:03,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:03,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 556 transitions. [2023-01-27 21:36:03,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 21:36:03,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:03,024 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:03,024 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 722 flow. Second operand 5 states and 556 transitions. [2023-01-27 21:36:03,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 176 transitions, 1769 flow [2023-01-27 21:36:03,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 176 transitions, 1725 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-27 21:36:03,325 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 728 flow [2023-01-27 21:36:03,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=728, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2023-01-27 21:36:03,326 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 58 predicate places. [2023-01-27 21:36:03,326 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 728 flow [2023-01-27 21:36:03,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:03,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:03,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:03,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-27 21:36:03,327 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:03,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash 496335170, now seen corresponding path program 3 times [2023-01-27 21:36:03,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:03,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785594937] [2023-01-27 21:36:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:03,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:03,399 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 21:36:03,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:03,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785594937] [2023-01-27 21:36:03,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785594937] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:36:03,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:36:03,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:36:03,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937976355] [2023-01-27 21:36:03,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:36:03,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:36:03,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:36:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:36:03,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:03,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 728 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:03,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:03,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:03,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:04,893 INFO L130 PetriNetUnfolder]: 13022/17777 cut-off events. [2023-01-27 21:36:04,893 INFO L131 PetriNetUnfolder]: For 115257/120649 co-relation queries the response was YES. [2023-01-27 21:36:04,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90874 conditions, 17777 events. 13022/17777 cut-off events. For 115257/120649 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 99379 event pairs, 3174 based on Foata normal form. 2689/20312 useless extension candidates. Maximal degree in co-relation 82150. Up to 9978 conditions per place. [2023-01-27 21:36:04,978 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 159 selfloop transitions, 13 changer transitions 0/179 dead transitions. [2023-01-27 21:36:04,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 179 transitions, 1966 flow [2023-01-27 21:36:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:36:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:36:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 552 transitions. [2023-01-27 21:36:04,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207547169811321 [2023-01-27 21:36:04,980 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 552 transitions. [2023-01-27 21:36:04,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 552 transitions. [2023-01-27 21:36:04,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:04,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 552 transitions. [2023-01-27 21:36:04,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 21:36:04,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:04,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:04,982 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 728 flow. Second operand 5 states and 552 transitions. [2023-01-27 21:36:04,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 179 transitions, 1966 flow [2023-01-27 21:36:05,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 179 transitions, 1874 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-01-27 21:36:05,177 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 735 flow [2023-01-27 21:36:05,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=735, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2023-01-27 21:36:05,178 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 60 predicate places. [2023-01-27 21:36:05,178 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 735 flow [2023-01-27 21:36:05,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:05,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:05,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:05,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-27 21:36:05,179 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:05,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:05,179 INFO L85 PathProgramCache]: Analyzing trace with hash 261516316, now seen corresponding path program 4 times [2023-01-27 21:36:05,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:05,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904495002] [2023-01-27 21:36:05,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:05,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:05,230 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 21:36:05,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:05,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904495002] [2023-01-27 21:36:05,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904495002] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:36:05,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524224125] [2023-01-27 21:36:05,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:36:05,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:36:05,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:36:05,232 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 21:36:05,234 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 21:36:05,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:36:05,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:36:05,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 21:36:05,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:36:05,331 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 21:36:05,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:36:05,350 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 21:36:05,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524224125] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:36:05,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:36:05,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-27 21:36:05,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131599263] [2023-01-27 21:36:05,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:36:05,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 21:36:05,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:05,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 21:36:05,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-27 21:36:05,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:05,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 735 flow. Second operand has 8 states, 8 states have (on average 98.875) internal successors, (791), 8 states have internal predecessors, (791), 0 states have call successors, (0), 0 states 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 21:36:05,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:05,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:05,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:06,861 INFO L130 PetriNetUnfolder]: 13620/18549 cut-off events. [2023-01-27 21:36:06,861 INFO L131 PetriNetUnfolder]: For 116629/122375 co-relation queries the response was YES. [2023-01-27 21:36:06,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96364 conditions, 18549 events. 13620/18549 cut-off events. For 116629/122375 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 104631 event pairs, 1504 based on Foata normal form. 2887/21276 useless extension candidates. Maximal degree in co-relation 87643. Up to 8289 conditions per place. [2023-01-27 21:36:06,975 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 155 selfloop transitions, 16 changer transitions 0/178 dead transitions. [2023-01-27 21:36:06,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 178 transitions, 1933 flow [2023-01-27 21:36:06,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:36:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:36:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 545 transitions. [2023-01-27 21:36:06,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2023-01-27 21:36:06,977 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 545 transitions. [2023-01-27 21:36:06,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 545 transitions. [2023-01-27 21:36:06,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:06,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 545 transitions. [2023-01-27 21:36:06,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 21:36:06,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:06,980 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:06,980 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 735 flow. Second operand 5 states and 545 transitions. [2023-01-27 21:36:06,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 178 transitions, 1933 flow [2023-01-27 21:36:07,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 178 transitions, 1899 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-01-27 21:36:07,234 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 777 flow [2023-01-27 21:36:07,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=777, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2023-01-27 21:36:07,235 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2023-01-27 21:36:07,235 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 777 flow [2023-01-27 21:36:07,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 98.875) internal successors, (791), 8 states have internal predecessors, (791), 0 states have call successors, (0), 0 states 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 21:36:07,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:07,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:07,240 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 21:36:07,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:36:07,436 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:07,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1703650341, now seen corresponding path program 4 times [2023-01-27 21:36:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:07,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927534064] [2023-01-27 21:36:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:07,524 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 21:36:07,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:07,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927534064] [2023-01-27 21:36:07,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927534064] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:36:07,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:36:07,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:36:07,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129649230] [2023-01-27 21:36:07,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:36:07,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:36:07,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:07,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:36:07,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:36:07,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:07,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 777 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:07,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:07,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:07,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:09,183 INFO L130 PetriNetUnfolder]: 13966/19130 cut-off events. [2023-01-27 21:36:09,184 INFO L131 PetriNetUnfolder]: For 140441/146439 co-relation queries the response was YES. [2023-01-27 21:36:09,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100921 conditions, 19130 events. 13966/19130 cut-off events. For 140441/146439 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 109510 event pairs, 3588 based on Foata normal form. 2911/21877 useless extension candidates. Maximal degree in co-relation 91788. Up to 10240 conditions per place. [2023-01-27 21:36:09,283 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 166 selfloop transitions, 17 changer transitions 2/192 dead transitions. [2023-01-27 21:36:09,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 192 transitions, 2089 flow [2023-01-27 21:36:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:36:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:36:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 549 transitions. [2023-01-27 21:36:09,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5179245283018868 [2023-01-27 21:36:09,284 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 549 transitions. [2023-01-27 21:36:09,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 549 transitions. [2023-01-27 21:36:09,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:09,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 549 transitions. [2023-01-27 21:36:09,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states 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 21:36:09,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:09,288 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:09,288 INFO L175 Difference]: Start difference. First operand has 101 places, 83 transitions, 777 flow. Second operand 5 states and 549 transitions. [2023-01-27 21:36:09,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 192 transitions, 2089 flow [2023-01-27 21:36:09,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 192 transitions, 2067 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-27 21:36:09,663 INFO L231 Difference]: Finished difference. Result has 106 places, 85 transitions, 837 flow [2023-01-27 21:36:09,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=837, PETRI_PLACES=106, PETRI_TRANSITIONS=85} [2023-01-27 21:36:09,664 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2023-01-27 21:36:09,664 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 85 transitions, 837 flow [2023-01-27 21:36:09,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:09,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:09,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:09,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-27 21:36:09,665 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:09,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:09,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1101080746, now seen corresponding path program 5 times [2023-01-27 21:36:09,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:09,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656128632] [2023-01-27 21:36:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:09,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:09,731 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 21:36:09,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:09,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656128632] [2023-01-27 21:36:09,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656128632] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:36:09,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:36:09,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:36:09,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963776137] [2023-01-27 21:36:09,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:36:09,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:36:09,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:36:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:36:09,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:09,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 85 transitions, 837 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:09,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:09,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:09,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:11,460 INFO L130 PetriNetUnfolder]: 13782/18946 cut-off events. [2023-01-27 21:36:11,460 INFO L131 PetriNetUnfolder]: For 144705/150703 co-relation queries the response was YES. [2023-01-27 21:36:11,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104440 conditions, 18946 events. 13782/18946 cut-off events. For 144705/150703 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 109100 event pairs, 3110 based on Foata normal form. 3003/21785 useless extension candidates. Maximal degree in co-relation 94992. Up to 8406 conditions per place. [2023-01-27 21:36:11,569 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 161 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2023-01-27 21:36:11,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 2056 flow [2023-01-27 21:36:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:36:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:36:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-01-27 21:36:11,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226415094339623 [2023-01-27 21:36:11,572 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-01-27 21:36:11,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-01-27 21:36:11,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:11,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-01-27 21:36:11,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states 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 21:36:11,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:11,575 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:11,575 INFO L175 Difference]: Start difference. First operand has 106 places, 85 transitions, 837 flow. Second operand 5 states and 554 transitions. [2023-01-27 21:36:11,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 2056 flow [2023-01-27 21:36:12,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 187 transitions, 2032 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-27 21:36:12,022 INFO L231 Difference]: Finished difference. Result has 110 places, 86 transitions, 870 flow [2023-01-27 21:36:12,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=870, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2023-01-27 21:36:12,023 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2023-01-27 21:36:12,023 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 870 flow [2023-01-27 21:36:12,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:12,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:12,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:12,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-27 21:36:12,023 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:12,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1916988810, now seen corresponding path program 6 times [2023-01-27 21:36:12,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:12,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726415414] [2023-01-27 21:36:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:12,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:12,101 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 21:36:12,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:12,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726415414] [2023-01-27 21:36:12,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726415414] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:36:12,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:36:12,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:36:12,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425474674] [2023-01-27 21:36:12,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:36:12,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:36:12,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:12,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:36:12,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:36:12,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:12,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:12,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:12,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:12,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:13,645 INFO L130 PetriNetUnfolder]: 12572/17218 cut-off events. [2023-01-27 21:36:13,646 INFO L131 PetriNetUnfolder]: For 144675/150095 co-relation queries the response was YES. [2023-01-27 21:36:13,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96545 conditions, 17218 events. 12572/17218 cut-off events. For 144675/150095 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 97225 event pairs, 3226 based on Foata normal form. 2755/19817 useless extension candidates. Maximal degree in co-relation 87804. Up to 9096 conditions per place. [2023-01-27 21:36:13,734 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 177 selfloop transitions, 22 changer transitions 4/210 dead transitions. [2023-01-27 21:36:13,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 210 transitions, 2349 flow [2023-01-27 21:36:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:36:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:36:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 656 transitions. [2023-01-27 21:36:13,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2023-01-27 21:36:13,736 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 656 transitions. [2023-01-27 21:36:13,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 656 transitions. [2023-01-27 21:36:13,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:13,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 656 transitions. [2023-01-27 21:36:13,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.33333333333333) internal successors, (656), 6 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 21:36:13,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states 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 21:36:13,739 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states 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 21:36:13,739 INFO L175 Difference]: Start difference. First operand has 110 places, 86 transitions, 870 flow. Second operand 6 states and 656 transitions. [2023-01-27 21:36:13,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 210 transitions, 2349 flow [2023-01-27 21:36:14,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 210 transitions, 2308 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-27 21:36:14,218 INFO L231 Difference]: Finished difference. Result has 113 places, 89 transitions, 926 flow [2023-01-27 21:36:14,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=926, PETRI_PLACES=113, PETRI_TRANSITIONS=89} [2023-01-27 21:36:14,219 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2023-01-27 21:36:14,219 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 89 transitions, 926 flow [2023-01-27 21:36:14,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:14,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:14,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:14,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-27 21:36:14,220 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:14,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash -834954938, now seen corresponding path program 5 times [2023-01-27 21:36:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:14,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887382903] [2023-01-27 21:36:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:14,272 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 21:36:14,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:14,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887382903] [2023-01-27 21:36:14,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887382903] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:36:14,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:36:14,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:36:14,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486763030] [2023-01-27 21:36:14,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:36:14,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:36:14,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:14,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:36:14,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:36:14,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:14,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 89 transitions, 926 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:14,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:14,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:14,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:15,741 INFO L130 PetriNetUnfolder]: 11478/15699 cut-off events. [2023-01-27 21:36:15,742 INFO L131 PetriNetUnfolder]: For 158993/165969 co-relation queries the response was YES. [2023-01-27 21:36:15,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88786 conditions, 15699 events. 11478/15699 cut-off events. For 158993/165969 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 90292 event pairs, 2724 based on Foata normal form. 2978/18424 useless extension candidates. Maximal degree in co-relation 80026. Up to 8044 conditions per place. [2023-01-27 21:36:15,835 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 192 selfloop transitions, 22 changer transitions 14/236 dead transitions. [2023-01-27 21:36:15,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 236 transitions, 2900 flow [2023-01-27 21:36:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:36:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:36:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 660 transitions. [2023-01-27 21:36:15,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2023-01-27 21:36:15,838 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 660 transitions. [2023-01-27 21:36:15,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 660 transitions. [2023-01-27 21:36:15,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:15,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 660 transitions. [2023-01-27 21:36:15,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 21:36:15,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states 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 21:36:15,841 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states 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 21:36:15,841 INFO L175 Difference]: Start difference. First operand has 113 places, 89 transitions, 926 flow. Second operand 6 states and 660 transitions. [2023-01-27 21:36:15,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 236 transitions, 2900 flow [2023-01-27 21:36:16,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 236 transitions, 2681 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-01-27 21:36:16,209 INFO L231 Difference]: Finished difference. Result has 116 places, 93 transitions, 983 flow [2023-01-27 21:36:16,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=983, PETRI_PLACES=116, PETRI_TRANSITIONS=93} [2023-01-27 21:36:16,210 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2023-01-27 21:36:16,210 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 93 transitions, 983 flow [2023-01-27 21:36:16,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:16,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:16,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:16,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-01-27 21:36:16,211 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:16,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1962537474, now seen corresponding path program 6 times [2023-01-27 21:36:16,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:16,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737986623] [2023-01-27 21:36:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:16,265 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 21:36:16,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:16,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737986623] [2023-01-27 21:36:16,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737986623] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:36:16,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:36:16,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:36:16,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004227312] [2023-01-27 21:36:16,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:36:16,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:36:16,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:36:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:36:16,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:16,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 93 transitions, 983 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:16,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:16,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:16,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:17,666 INFO L130 PetriNetUnfolder]: 10594/14533 cut-off events. [2023-01-27 21:36:17,666 INFO L131 PetriNetUnfolder]: For 149934/156027 co-relation queries the response was YES. [2023-01-27 21:36:17,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84105 conditions, 14533 events. 10594/14533 cut-off events. For 149934/156027 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 81784 event pairs, 2384 based on Foata normal form. 2529/16860 useless extension candidates. Maximal degree in co-relation 75793. Up to 6316 conditions per place. [2023-01-27 21:36:17,744 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 180 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2023-01-27 21:36:17,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 207 transitions, 2457 flow [2023-01-27 21:36:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:36:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:36:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 552 transitions. [2023-01-27 21:36:17,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207547169811321 [2023-01-27 21:36:17,746 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 552 transitions. [2023-01-27 21:36:17,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 552 transitions. [2023-01-27 21:36:17,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:17,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 552 transitions. [2023-01-27 21:36:17,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 21:36:17,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:17,749 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 212.0) internal successors, (1272), 6 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:36:17,749 INFO L175 Difference]: Start difference. First operand has 116 places, 93 transitions, 983 flow. Second operand 5 states and 552 transitions. [2023-01-27 21:36:17,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 207 transitions, 2457 flow [2023-01-27 21:36:18,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 207 transitions, 2394 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-01-27 21:36:18,089 INFO L231 Difference]: Finished difference. Result has 118 places, 94 transitions, 990 flow [2023-01-27 21:36:18,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=990, PETRI_PLACES=118, PETRI_TRANSITIONS=94} [2023-01-27 21:36:18,089 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-01-27 21:36:18,090 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 94 transitions, 990 flow [2023-01-27 21:36:18,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 21:36:18,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:18,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:18,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-01-27 21:36:18,090 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:18,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:18,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1846128017, now seen corresponding path program 1 times [2023-01-27 21:36:18,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:18,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676237180] [2023-01-27 21:36:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:18,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:36:18,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:18,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676237180] [2023-01-27 21:36:18,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676237180] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:36:18,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:36:18,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 21:36:18,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949961264] [2023-01-27 21:36:18,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:36:18,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:36:18,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:18,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:36:18,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:36:18,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 212 [2023-01-27 21:36:18,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 94 transitions, 990 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 21:36:18,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:18,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 212 [2023-01-27 21:36:18,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:18,952 INFO L130 PetriNetUnfolder]: 6080/8552 cut-off events. [2023-01-27 21:36:18,952 INFO L131 PetriNetUnfolder]: For 104356/111588 co-relation queries the response was YES. [2023-01-27 21:36:18,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49938 conditions, 8552 events. 6080/8552 cut-off events. For 104356/111588 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 49692 event pairs, 2052 based on Foata normal form. 3234/11552 useless extension candidates. Maximal degree in co-relation 46225. Up to 5745 conditions per place. [2023-01-27 21:36:18,999 INFO L137 encePairwiseOnDemand]: 209/212 looper letters, 80 selfloop transitions, 10 changer transitions 15/119 dead transitions. [2023-01-27 21:36:18,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 1359 flow [2023-01-27 21:36:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:36:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:36:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-01-27 21:36:19,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691823899371069 [2023-01-27 21:36:19,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-01-27 21:36:19,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-01-27 21:36:19,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:19,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-01-27 21:36:19,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 21:36:19,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states 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 21:36:19,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states 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 21:36:19,004 INFO L175 Difference]: Start difference. First operand has 118 places, 94 transitions, 990 flow. Second operand 3 states and 362 transitions. [2023-01-27 21:36:19,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 1359 flow [2023-01-27 21:36:19,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 1316 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-27 21:36:19,172 INFO L231 Difference]: Finished difference. Result has 118 places, 83 transitions, 869 flow [2023-01-27 21:36:19,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=869, PETRI_PLACES=118, PETRI_TRANSITIONS=83} [2023-01-27 21:36:19,172 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-01-27 21:36:19,172 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 83 transitions, 869 flow [2023-01-27 21:36:19,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 21:36:19,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:19,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:19,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-27 21:36:19,173 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:19,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:19,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1030320933, now seen corresponding path program 1 times [2023-01-27 21:36:19,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:19,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503053514] [2023-01-27 21:36:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:19,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:19,303 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 21:36:19,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:19,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503053514] [2023-01-27 21:36:19,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503053514] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:36:19,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65344373] [2023-01-27 21:36:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:19,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:36:19,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:36:19,313 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 21:36:19,337 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 21:36:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:19,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 21:36:19,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:36:19,546 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 21:36:19,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:36:19,625 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 21:36:19,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65344373] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:36:19,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:36:19,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-01-27 21:36:19,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632741287] [2023-01-27 21:36:19,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:36:19,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:36:19,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:19,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:36:19,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:36:19,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 212 [2023-01-27 21:36:19,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 83 transitions, 869 flow. Second operand has 7 states, 7 states have (on average 110.71428571428571) internal successors, (775), 7 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 21:36:19,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:19,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 212 [2023-01-27 21:36:19,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:21,193 INFO L130 PetriNetUnfolder]: 11144/15339 cut-off events. [2023-01-27 21:36:21,193 INFO L131 PetriNetUnfolder]: For 142210/151798 co-relation queries the response was YES. [2023-01-27 21:36:21,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83356 conditions, 15339 events. 11144/15339 cut-off events. For 142210/151798 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 86220 event pairs, 1030 based on Foata normal form. 4585/19766 useless extension candidates. Maximal degree in co-relation 82420. Up to 8061 conditions per place. [2023-01-27 21:36:21,278 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 163 selfloop transitions, 83 changer transitions 5/265 dead transitions. [2023-01-27 21:36:21,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 265 transitions, 2815 flow [2023-01-27 21:36:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:36:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:36:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 856 transitions. [2023-01-27 21:36:21,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768194070080862 [2023-01-27 21:36:21,280 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 856 transitions. [2023-01-27 21:36:21,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 856 transitions. [2023-01-27 21:36:21,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:21,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 856 transitions. [2023-01-27 21:36:21,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.28571428571429) internal successors, (856), 7 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 21:36:21,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 21:36:21,284 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 21:36:21,284 INFO L175 Difference]: Start difference. First operand has 118 places, 83 transitions, 869 flow. Second operand 7 states and 856 transitions. [2023-01-27 21:36:21,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 265 transitions, 2815 flow [2023-01-27 21:36:21,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 265 transitions, 2738 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-01-27 21:36:21,575 INFO L231 Difference]: Finished difference. Result has 111 places, 150 transitions, 1877 flow [2023-01-27 21:36:21,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1877, PETRI_PLACES=111, PETRI_TRANSITIONS=150} [2023-01-27 21:36:21,576 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2023-01-27 21:36:21,576 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 150 transitions, 1877 flow [2023-01-27 21:36:21,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.71428571428571) internal successors, (775), 7 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 21:36:21,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:21,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:21,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 21:36:21,777 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,SelfDestructingSolverStorable21 [2023-01-27 21:36:21,777 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:21,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:21,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1938151797, now seen corresponding path program 2 times [2023-01-27 21:36:21,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:21,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220519082] [2023-01-27 21:36:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:21,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:21,889 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 21:36:21,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:21,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220519082] [2023-01-27 21:36:21,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220519082] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:36:21,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066295840] [2023-01-27 21:36:21,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:36:21,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:36:21,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:36:21,891 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 21:36:21,917 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 21:36:22,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:36:22,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:36:22,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 21:36:22,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:36:22,124 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 21:36:22,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:36:22,197 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 21:36:22,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066295840] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:36:22,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:36:22,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-01-27 21:36:22,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982075100] [2023-01-27 21:36:22,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:36:22,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:36:22,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:22,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:36:22,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:36:22,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 212 [2023-01-27 21:36:22,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 150 transitions, 1877 flow. Second operand has 7 states, 7 states have (on average 110.71428571428571) internal successors, (775), 7 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 21:36:22,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:22,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 212 [2023-01-27 21:36:22,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:24,527 INFO L130 PetriNetUnfolder]: 16518/22700 cut-off events. [2023-01-27 21:36:24,527 INFO L131 PetriNetUnfolder]: For 224549/237152 co-relation queries the response was YES. [2023-01-27 21:36:24,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131803 conditions, 22700 events. 16518/22700 cut-off events. For 224549/237152 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 133422 event pairs, 2818 based on Foata normal form. 5149/27700 useless extension candidates. Maximal degree in co-relation 115802. Up to 16448 conditions per place. [2023-01-27 21:36:24,654 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 235 selfloop transitions, 79 changer transitions 5/333 dead transitions. [2023-01-27 21:36:24,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 333 transitions, 4176 flow [2023-01-27 21:36:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:36:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:36:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 852 transitions. [2023-01-27 21:36:24,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5741239892183289 [2023-01-27 21:36:24,656 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 852 transitions. [2023-01-27 21:36:24,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 852 transitions. [2023-01-27 21:36:24,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:24,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 852 transitions. [2023-01-27 21:36:24,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 states 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 21:36:24,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 21:36:24,659 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 21:36:24,659 INFO L175 Difference]: Start difference. First operand has 111 places, 150 transitions, 1877 flow. Second operand 7 states and 852 transitions. [2023-01-27 21:36:24,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 333 transitions, 4176 flow [2023-01-27 21:36:25,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 333 transitions, 3970 flow, removed 103 selfloop flow, removed 0 redundant places. [2023-01-27 21:36:25,224 INFO L231 Difference]: Finished difference. Result has 120 places, 222 transitions, 2956 flow [2023-01-27 21:36:25,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2956, PETRI_PLACES=120, PETRI_TRANSITIONS=222} [2023-01-27 21:36:25,225 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-01-27 21:36:25,225 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 222 transitions, 2956 flow [2023-01-27 21:36:25,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.71428571428571) internal successors, (775), 7 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 21:36:25,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:25,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:25,230 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 21:36:25,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:36:25,426 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:25,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1252895162, now seen corresponding path program 3 times [2023-01-27 21:36:25,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:25,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000620645] [2023-01-27 21:36:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:25,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:25,493 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 21:36:25,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000620645] [2023-01-27 21:36:25,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000620645] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:36:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573244904] [2023-01-27 21:36:25,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:36:25,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:36:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:36:25,495 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 21:36:25,497 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 21:36:25,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:36:25,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:36:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:36:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:36:25,651 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 21:36:25,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:36:25,687 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 21:36:25,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573244904] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:36:25,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:36:25,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-27 21:36:25,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127632646] [2023-01-27 21:36:25,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:36:25,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:36:25,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:36:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:36:25,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:25,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 222 transitions, 2956 flow. Second operand has 11 states, 11 states have (on average 98.0909090909091) internal successors, (1079), 11 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states 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 21:36:25,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:25,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:25,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:30,091 INFO L130 PetriNetUnfolder]: 24378/33563 cut-off events. [2023-01-27 21:36:30,091 INFO L131 PetriNetUnfolder]: For 352237/367754 co-relation queries the response was YES. [2023-01-27 21:36:30,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195633 conditions, 33563 events. 24378/33563 cut-off events. For 352237/367754 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 206013 event pairs, 4662 based on Foata normal form. 6301/39773 useless extension candidates. Maximal degree in co-relation 178805. Up to 17876 conditions per place. [2023-01-27 21:36:30,451 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 424 selfloop transitions, 39 changer transitions 0/471 dead transitions. [2023-01-27 21:36:30,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 471 transitions, 6731 flow [2023-01-27 21:36:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:36:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:36:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 772 transitions. [2023-01-27 21:36:30,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202156334231806 [2023-01-27 21:36:30,453 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 772 transitions. [2023-01-27 21:36:30,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 772 transitions. [2023-01-27 21:36:30,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:30,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 772 transitions. [2023-01-27 21:36:30,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 21:36:30,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 21:36:30,476 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 21:36:30,476 INFO L175 Difference]: Start difference. First operand has 120 places, 222 transitions, 2956 flow. Second operand 7 states and 772 transitions. [2023-01-27 21:36:30,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 471 transitions, 6731 flow [2023-01-27 21:36:32,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 471 transitions, 6219 flow, removed 256 selfloop flow, removed 0 redundant places. [2023-01-27 21:36:32,036 INFO L231 Difference]: Finished difference. Result has 130 places, 245 transitions, 3052 flow [2023-01-27 21:36:32,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3052, PETRI_PLACES=130, PETRI_TRANSITIONS=245} [2023-01-27 21:36:32,036 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 92 predicate places. [2023-01-27 21:36:32,036 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 245 transitions, 3052 flow [2023-01-27 21:36:32,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 98.0909090909091) internal successors, (1079), 11 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states 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 21:36:32,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:32,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:32,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-01-27 21:36:32,237 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,SelfDestructingSolverStorable23 [2023-01-27 21:36:32,238 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:32,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:32,238 INFO L85 PathProgramCache]: Analyzing trace with hash -563281195, now seen corresponding path program 4 times [2023-01-27 21:36:32,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:32,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618184763] [2023-01-27 21:36:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:32,330 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 21:36:32,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:32,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618184763] [2023-01-27 21:36:32,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618184763] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:36:32,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152375073] [2023-01-27 21:36:32,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:36:32,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:36:32,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:36:32,332 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 21:36:32,335 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 21:36:32,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:36:32,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:36:32,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:36:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:36:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:36:32,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:36:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:36:32,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152375073] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:36:32,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:36:32,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-27 21:36:32,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582959821] [2023-01-27 21:36:32,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:36:32,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:36:32,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:36:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:36:32,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:32,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 245 transitions, 3052 flow. Second operand has 11 states, 11 states have (on average 98.18181818181819) internal successors, (1080), 11 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states 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 21:36:32,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:32,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:32,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:36,995 INFO L130 PetriNetUnfolder]: 25169/34809 cut-off events. [2023-01-27 21:36:36,995 INFO L131 PetriNetUnfolder]: For 399996/414714 co-relation queries the response was YES. [2023-01-27 21:36:37,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203217 conditions, 34809 events. 25169/34809 cut-off events. For 399996/414714 co-relation queries the response was YES. Maximal size of possible extension queue 1873. Compared 220721 event pairs, 4386 based on Foata normal form. 6104/40636 useless extension candidates. Maximal degree in co-relation 184960. Up to 16345 conditions per place. [2023-01-27 21:36:37,254 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 721 selfloop transitions, 54 changer transitions 34/817 dead transitions. [2023-01-27 21:36:37,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 817 transitions, 11389 flow [2023-01-27 21:36:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:36:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:36:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1193 transitions. [2023-01-27 21:36:37,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115780445969125 [2023-01-27 21:36:37,255 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1193 transitions. [2023-01-27 21:36:37,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1193 transitions. [2023-01-27 21:36:37,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:37,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1193 transitions. [2023-01-27 21:36:37,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 108.45454545454545) internal successors, (1193), 11 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states 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 21:36:37,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states 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 21:36:37,258 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states 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 21:36:37,259 INFO L175 Difference]: Start difference. First operand has 130 places, 245 transitions, 3052 flow. Second operand 11 states and 1193 transitions. [2023-01-27 21:36:37,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 817 transitions, 11389 flow [2023-01-27 21:36:38,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 817 transitions, 11302 flow, removed 29 selfloop flow, removed 2 redundant places. [2023-01-27 21:36:38,650 INFO L231 Difference]: Finished difference. Result has 143 places, 273 transitions, 3501 flow [2023-01-27 21:36:38,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3501, PETRI_PLACES=143, PETRI_TRANSITIONS=273} [2023-01-27 21:36:38,651 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2023-01-27 21:36:38,651 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 273 transitions, 3501 flow [2023-01-27 21:36:38,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 98.18181818181819) internal successors, (1080), 11 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states 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 21:36:38,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:38,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:38,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 21:36:38,852 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,SelfDestructingSolverStorable24 [2023-01-27 21:36:38,852 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:38,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:38,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1667997905, now seen corresponding path program 5 times [2023-01-27 21:36:38,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:38,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143025443] [2023-01-27 21:36:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:38,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:38,932 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 21:36:38,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:38,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143025443] [2023-01-27 21:36:38,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143025443] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:36:38,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548259163] [2023-01-27 21:36:38,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:36:38,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:36:38,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:36:38,937 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 21:36:38,965 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 21:36:39,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:36:39,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:36:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:36:39,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:36:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:36:39,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:36:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:36:39,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548259163] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:36:39,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:36:39,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-27 21:36:39,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117090174] [2023-01-27 21:36:39,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:36:39,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:36:39,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:39,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:36:39,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:36:39,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:39,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 273 transitions, 3501 flow. Second operand has 12 states, 12 states have (on average 98.0) internal successors, (1176), 12 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 21:36:39,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:39,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:39,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:36:47,577 INFO L130 PetriNetUnfolder]: 45403/62726 cut-off events. [2023-01-27 21:36:47,577 INFO L131 PetriNetUnfolder]: For 689282/716371 co-relation queries the response was YES. [2023-01-27 21:36:47,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379482 conditions, 62726 events. 45403/62726 cut-off events. For 689282/716371 co-relation queries the response was YES. Maximal size of possible extension queue 3089. Compared 416038 event pairs, 10097 based on Foata normal form. 11614/74086 useless extension candidates. Maximal degree in co-relation 332966. Up to 23541 conditions per place. [2023-01-27 21:36:48,154 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 740 selfloop transitions, 152 changer transitions 0/900 dead transitions. [2023-01-27 21:36:48,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 900 transitions, 12321 flow [2023-01-27 21:36:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 21:36:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 21:36:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1433 transitions. [2023-01-27 21:36:48,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199564586357039 [2023-01-27 21:36:48,156 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1433 transitions. [2023-01-27 21:36:48,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1433 transitions. [2023-01-27 21:36:48,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:36:48,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1433 transitions. [2023-01-27 21:36:48,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 110.23076923076923) internal successors, (1433), 13 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states 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 21:36:48,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 212.0) internal successors, (2968), 14 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states 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 21:36:48,160 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 212.0) internal successors, (2968), 14 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states 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 21:36:48,160 INFO L175 Difference]: Start difference. First operand has 143 places, 273 transitions, 3501 flow. Second operand 13 states and 1433 transitions. [2023-01-27 21:36:48,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 900 transitions, 12321 flow [2023-01-27 21:36:52,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 900 transitions, 12068 flow, removed 87 selfloop flow, removed 1 redundant places. [2023-01-27 21:36:52,866 INFO L231 Difference]: Finished difference. Result has 161 places, 372 transitions, 5050 flow [2023-01-27 21:36:52,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5050, PETRI_PLACES=161, PETRI_TRANSITIONS=372} [2023-01-27 21:36:52,866 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2023-01-27 21:36:52,866 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 372 transitions, 5050 flow [2023-01-27 21:36:52,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.0) internal successors, (1176), 12 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 21:36:52,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:36:52,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:36:52,871 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 21:36:53,067 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,SelfDestructingSolverStorable25 [2023-01-27 21:36:53,067 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:36:53,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:36:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2081496792, now seen corresponding path program 6 times [2023-01-27 21:36:53,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:36:53,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521872304] [2023-01-27 21:36:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:36:53,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:36:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:36:53,143 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 21:36:53,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:36:53,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521872304] [2023-01-27 21:36:53,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521872304] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:36:53,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736321206] [2023-01-27 21:36:53,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:36:53,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:36:53,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:36:53,145 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 21:36:53,148 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 21:36:53,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:36:53,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:36:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:36:53,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:36:53,311 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 21:36:53,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:36:53,354 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 21:36:53,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736321206] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:36:53,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:36:53,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-27 21:36:53,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921451133] [2023-01-27 21:36:53,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:36:53,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:36:53,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:36:53,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:36:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:36:53,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:36:53,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 372 transitions, 5050 flow. Second operand has 13 states, 13 states have (on average 98.15384615384616) internal successors, (1276), 13 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states 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 21:36:53,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:36:53,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:36:53,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:04,016 INFO L130 PetriNetUnfolder]: 55320/75974 cut-off events. [2023-01-27 21:37:04,016 INFO L131 PetriNetUnfolder]: For 974343/1006837 co-relation queries the response was YES. [2023-01-27 21:37:04,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481478 conditions, 75974 events. 55320/75974 cut-off events. For 974343/1006837 co-relation queries the response was YES. Maximal size of possible extension queue 3587. Compared 506851 event pairs, 13827 based on Foata normal form. 15177/90969 useless extension candidates. Maximal degree in co-relation 422526. Up to 57946 conditions per place. [2023-01-27 21:37:04,829 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 691 selfloop transitions, 103 changer transitions 0/802 dead transitions. [2023-01-27 21:37:04,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 802 transitions, 11760 flow [2023-01-27 21:37:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:37:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:37:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1200 transitions. [2023-01-27 21:37:04,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145797598627787 [2023-01-27 21:37:04,831 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1200 transitions. [2023-01-27 21:37:04,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1200 transitions. [2023-01-27 21:37:04,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:04,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1200 transitions. [2023-01-27 21:37:04,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 109.0909090909091) internal successors, (1200), 11 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states 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 21:37:04,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states 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 21:37:04,835 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 212.0) internal successors, (2544), 12 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states 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 21:37:04,835 INFO L175 Difference]: Start difference. First operand has 161 places, 372 transitions, 5050 flow. Second operand 11 states and 1200 transitions. [2023-01-27 21:37:04,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 802 transitions, 11760 flow [2023-01-27 21:37:13,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 802 transitions, 11424 flow, removed 99 selfloop flow, removed 5 redundant places. [2023-01-27 21:37:13,812 INFO L231 Difference]: Finished difference. Result has 171 places, 427 transitions, 5892 flow [2023-01-27 21:37:13,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=4749, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5892, PETRI_PLACES=171, PETRI_TRANSITIONS=427} [2023-01-27 21:37:13,813 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 133 predicate places. [2023-01-27 21:37:13,813 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 427 transitions, 5892 flow [2023-01-27 21:37:13,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.15384615384616) internal successors, (1276), 13 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states 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 21:37:13,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:13,813 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:13,818 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 21:37:14,015 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,SelfDestructingSolverStorable26 [2023-01-27 21:37:14,015 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:37:14,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash 219334723, now seen corresponding path program 7 times [2023-01-27 21:37:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:14,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88810980] [2023-01-27 21:37:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:14,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:14,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:14,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88810980] [2023-01-27 21:37:14,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88810980] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:14,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676290536] [2023-01-27 21:37:14,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:37:14,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:14,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:14,090 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 21:37:14,092 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 21:37:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:14,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:37:14,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:14,251 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 21:37:14,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:14,279 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 21:37:14,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676290536] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:14,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:14,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-27 21:37:14,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194721471] [2023-01-27 21:37:14,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:14,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:37:14,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:14,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:37:14,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:37:14,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:37:14,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 427 transitions, 5892 flow. Second operand has 12 states, 12 states have (on average 97.83333333333333) internal successors, (1174), 12 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states 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 21:37:14,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:14,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:37:14,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:28,049 INFO L130 PetriNetUnfolder]: 61521/85623 cut-off events. [2023-01-27 21:37:28,049 INFO L131 PetriNetUnfolder]: For 1297055/1334172 co-relation queries the response was YES. [2023-01-27 21:37:28,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573590 conditions, 85623 events. 61521/85623 cut-off events. For 1297055/1334172 co-relation queries the response was YES. Maximal size of possible extension queue 4184. Compared 604658 event pairs, 10504 based on Foata normal form. 16393/101726 useless extension candidates. Maximal degree in co-relation 503489. Up to 29926 conditions per place. [2023-01-27 21:37:29,287 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1284 selfloop transitions, 171 changer transitions 13/1476 dead transitions. [2023-01-27 21:37:29,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1476 transitions, 21403 flow [2023-01-27 21:37:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 21:37:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 21:37:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1960 transitions. [2023-01-27 21:37:29,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136268343815513 [2023-01-27 21:37:29,290 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1960 transitions. [2023-01-27 21:37:29,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1960 transitions. [2023-01-27 21:37:29,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:29,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1960 transitions. [2023-01-27 21:37:29,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 108.88888888888889) internal successors, (1960), 18 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states 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 21:37:29,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states 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 21:37:29,295 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states 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 21:37:29,295 INFO L175 Difference]: Start difference. First operand has 171 places, 427 transitions, 5892 flow. Second operand 18 states and 1960 transitions. [2023-01-27 21:37:29,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1476 transitions, 21403 flow [2023-01-27 21:37:39,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 1476 transitions, 20887 flow, removed 245 selfloop flow, removed 2 redundant places. [2023-01-27 21:37:39,193 INFO L231 Difference]: Finished difference. Result has 192 places, 492 transitions, 6725 flow [2023-01-27 21:37:39,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6725, PETRI_PLACES=192, PETRI_TRANSITIONS=492} [2023-01-27 21:37:39,194 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 154 predicate places. [2023-01-27 21:37:39,194 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 492 transitions, 6725 flow [2023-01-27 21:37:39,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 97.83333333333333) internal successors, (1174), 12 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states 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 21:37:39,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:39,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:39,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:39,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:39,398 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:37:39,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash -953766959, now seen corresponding path program 8 times [2023-01-27 21:37:39,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:39,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415441386] [2023-01-27 21:37:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:39,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:39,463 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 21:37:39,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415441386] [2023-01-27 21:37:39,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415441386] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627373330] [2023-01-27 21:37:39,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:37:39,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:39,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:39,465 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 21:37:39,492 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 21:37:39,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:37:39,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:37:39,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:39,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:39,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627373330] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:39,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:39,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-27 21:37:39,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680292992] [2023-01-27 21:37:39,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:39,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:37:39,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:39,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:37:39,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:37:39,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:37:39,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 492 transitions, 6725 flow. Second operand has 13 states, 13 states have (on average 98.3076923076923) internal successors, (1278), 13 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states 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 21:37:39,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:39,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:37:39,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:52,640 INFO L130 PetriNetUnfolder]: 60289/83939 cut-off events. [2023-01-27 21:37:52,640 INFO L131 PetriNetUnfolder]: For 1330333/1365514 co-relation queries the response was YES. [2023-01-27 21:37:53,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566957 conditions, 83939 events. 60289/83939 cut-off events. For 1330333/1365514 co-relation queries the response was YES. Maximal size of possible extension queue 4059. Compared 591297 event pairs, 13863 based on Foata normal form. 15035/98547 useless extension candidates. Maximal degree in co-relation 546224. Up to 40901 conditions per place. [2023-01-27 21:37:53,945 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1088 selfloop transitions, 156 changer transitions 52/1304 dead transitions. [2023-01-27 21:37:53,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1304 transitions, 18926 flow [2023-01-27 21:37:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 21:37:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 21:37:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1949 transitions. [2023-01-27 21:37:53,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107442348008385 [2023-01-27 21:37:53,947 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1949 transitions. [2023-01-27 21:37:53,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1949 transitions. [2023-01-27 21:37:53,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:53,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1949 transitions. [2023-01-27 21:37:53,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 108.27777777777777) internal successors, (1949), 18 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states 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 21:37:53,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states 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 21:37:53,951 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 212.0) internal successors, (4028), 19 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states 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 21:37:53,951 INFO L175 Difference]: Start difference. First operand has 192 places, 492 transitions, 6725 flow. Second operand 18 states and 1949 transitions. [2023-01-27 21:37:53,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1304 transitions, 18926 flow [2023-01-27 21:38:06,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1304 transitions, 18628 flow, removed 96 selfloop flow, removed 6 redundant places. [2023-01-27 21:38:06,439 INFO L231 Difference]: Finished difference. Result has 205 places, 497 transitions, 6863 flow [2023-01-27 21:38:06,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6863, PETRI_PLACES=205, PETRI_TRANSITIONS=497} [2023-01-27 21:38:06,440 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 167 predicate places. [2023-01-27 21:38:06,440 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 497 transitions, 6863 flow [2023-01-27 21:38:06,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.3076923076923) internal successors, (1278), 13 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states 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 21:38:06,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:06,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:06,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:06,646 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,SelfDestructingSolverStorable28 [2023-01-27 21:38:06,646 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:38:06,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1142683924, now seen corresponding path program 9 times [2023-01-27 21:38:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:06,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209230839] [2023-01-27 21:38:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:06,717 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 21:38:06,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:06,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209230839] [2023-01-27 21:38:06,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209230839] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:06,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342277381] [2023-01-27 21:38:06,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:38:06,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:06,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:06,719 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 21:38:06,722 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 21:38:06,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:38:06,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:06,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:38:06,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:06,921 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 21:38:06,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:06,965 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 21:38:06,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342277381] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:06,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:06,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-27 21:38:06,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438850062] [2023-01-27 21:38:06,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:06,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:38:06,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:06,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:38:06,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:38:06,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:38:06,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 497 transitions, 6863 flow. Second operand has 12 states, 12 states have (on average 98.66666666666667) internal successors, (1184), 12 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states 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 21:38:06,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:06,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:38:06,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:24,089 INFO L130 PetriNetUnfolder]: 75941/105716 cut-off events. [2023-01-27 21:38:24,089 INFO L131 PetriNetUnfolder]: For 1613808/1657279 co-relation queries the response was YES. [2023-01-27 21:38:25,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688507 conditions, 105716 events. 75941/105716 cut-off events. For 1613808/1657279 co-relation queries the response was YES. Maximal size of possible extension queue 4980. Compared 754196 event pairs, 15165 based on Foata normal form. 20393/125897 useless extension candidates. Maximal degree in co-relation 651103. Up to 55992 conditions per place. [2023-01-27 21:38:25,412 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 866 selfloop transitions, 211 changer transitions 0/1085 dead transitions. [2023-01-27 21:38:25,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1085 transitions, 16068 flow [2023-01-27 21:38:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:38:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:38:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1537 transitions. [2023-01-27 21:38:25,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2023-01-27 21:38:25,414 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1537 transitions. [2023-01-27 21:38:25,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1537 transitions. [2023-01-27 21:38:25,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:25,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1537 transitions. [2023-01-27 21:38:25,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 109.78571428571429) internal successors, (1537), 14 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states 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 21:38:25,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 212.0) internal successors, (3180), 15 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states 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 21:38:25,418 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 212.0) internal successors, (3180), 15 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states 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 21:38:25,418 INFO L175 Difference]: Start difference. First operand has 205 places, 497 transitions, 6863 flow. Second operand 14 states and 1537 transitions. [2023-01-27 21:38:25,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1085 transitions, 16068 flow [2023-01-27 21:38:37,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 1085 transitions, 15904 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-01-27 21:38:37,193 INFO L231 Difference]: Finished difference. Result has 213 places, 583 transitions, 8800 flow [2023-01-27 21:38:37,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=6715, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8800, PETRI_PLACES=213, PETRI_TRANSITIONS=583} [2023-01-27 21:38:37,194 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 175 predicate places. [2023-01-27 21:38:37,194 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 583 transitions, 8800 flow [2023-01-27 21:38:37,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.66666666666667) internal successors, (1184), 12 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states 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 21:38:37,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:37,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:37,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-01-27 21:38:37,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:37,400 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:38:37,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash -707100586, now seen corresponding path program 10 times [2023-01-27 21:38:37,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:37,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140202385] [2023-01-27 21:38:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:37,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:37,463 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 21:38:37,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:37,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140202385] [2023-01-27 21:38:37,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140202385] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:37,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80731232] [2023-01-27 21:38:37,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:38:37,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:37,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:37,465 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 21:38:37,495 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 21:38:37,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:38:37,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:37,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:38:37,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:37,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:37,648 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 21:38:37,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80731232] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:37,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:37,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-27 21:38:37,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089236855] [2023-01-27 21:38:37,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:37,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:38:37,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:37,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:38:37,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:38:37,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:38:37,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 583 transitions, 8800 flow. Second operand has 12 states, 12 states have (on average 98.0) internal successors, (1176), 12 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 21:38:37,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:37,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:38:37,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:56,904 INFO L130 PetriNetUnfolder]: 79900/111345 cut-off events. [2023-01-27 21:38:56,904 INFO L131 PetriNetUnfolder]: For 1877284/1924794 co-relation queries the response was YES. [2023-01-27 21:38:57,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767209 conditions, 111345 events. 79900/111345 cut-off events. For 1877284/1924794 co-relation queries the response was YES. Maximal size of possible extension queue 5338. Compared 812453 event pairs, 4913 based on Foata normal form. 20623/131853 useless extension candidates. Maximal degree in co-relation 727022. Up to 30749 conditions per place. [2023-01-27 21:38:58,437 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1239 selfloop transitions, 313 changer transitions 19/1579 dead transitions. [2023-01-27 21:38:58,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 1579 transitions, 24853 flow [2023-01-27 21:38:58,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 21:38:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 21:38:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2039 transitions. [2023-01-27 21:38:58,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062065541211519 [2023-01-27 21:38:58,440 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2039 transitions. [2023-01-27 21:38:58,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2039 transitions. [2023-01-27 21:38:58,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:58,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2039 transitions. [2023-01-27 21:38:58,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 107.3157894736842) internal successors, (2039), 19 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states 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 21:38:58,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 212.0) internal successors, (4240), 20 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states 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 21:38:58,446 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 212.0) internal successors, (4240), 20 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states 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 21:38:58,446 INFO L175 Difference]: Start difference. First operand has 213 places, 583 transitions, 8800 flow. Second operand 19 states and 2039 transitions. [2023-01-27 21:38:58,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 1579 transitions, 24853 flow [2023-01-27 21:39:23,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1579 transitions, 24077 flow, removed 293 selfloop flow, removed 9 redundant places. [2023-01-27 21:39:23,235 INFO L231 Difference]: Finished difference. Result has 227 places, 708 transitions, 11108 flow [2023-01-27 21:39:23,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11108, PETRI_PLACES=227, PETRI_TRANSITIONS=708} [2023-01-27 21:39:23,237 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 189 predicate places. [2023-01-27 21:39:23,238 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 708 transitions, 11108 flow [2023-01-27 21:39:23,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.0) internal successors, (1176), 12 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 21:39:23,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:39:23,238 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:39:23,243 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 21:39:23,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:39:23,440 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:39:23,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:39:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1904532894, now seen corresponding path program 11 times [2023-01-27 21:39:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:39:23,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003724065] [2023-01-27 21:39:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:39:23,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:39:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:39:23,501 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 21:39:23,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:39:23,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003724065] [2023-01-27 21:39:23,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003724065] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:39:23,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94425019] [2023-01-27 21:39:23,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:39:23,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:39:23,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:39:23,503 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 21:39:23,528 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 21:39:23,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:39:23,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:39:23,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:39:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:39:23,677 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 21:39:23,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:39:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:39:23,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94425019] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:39:23,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:39:23,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-27 21:39:23,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510129753] [2023-01-27 21:39:23,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:39:23,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:39:23,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:39:23,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:39:23,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:39:23,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:39:23,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 708 transitions, 11108 flow. Second operand has 13 states, 13 states have (on average 98.0) internal successors, (1274), 13 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states 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 21:39:23,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:39:23,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:39:23,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:39:51,632 INFO L130 PetriNetUnfolder]: 104986/147241 cut-off events. [2023-01-27 21:39:51,632 INFO L131 PetriNetUnfolder]: For 2646723/2707605 co-relation queries the response was YES. [2023-01-27 21:39:53,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041467 conditions, 147241 events. 104986/147241 cut-off events. For 2646723/2707605 co-relation queries the response was YES. Maximal size of possible extension queue 6943. Compared 1119030 event pairs, 6087 based on Foata normal form. 27299/174445 useless extension candidates. Maximal degree in co-relation 946521. Up to 43024 conditions per place. [2023-01-27 21:39:53,961 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 1557 selfloop transitions, 457 changer transitions 36/2058 dead transitions. [2023-01-27 21:39:53,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 2058 transitions, 32989 flow [2023-01-27 21:39:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 21:39:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 21:39:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2271 transitions. [2023-01-27 21:39:53,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101078167115903 [2023-01-27 21:39:53,963 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2271 transitions. [2023-01-27 21:39:53,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2271 transitions. [2023-01-27 21:39:53,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:39:53,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2271 transitions. [2023-01-27 21:39:53,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 108.14285714285714) internal successors, (2271), 21 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states 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 21:39:53,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 212.0) internal successors, (4664), 22 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states 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 21:39:53,969 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 212.0) internal successors, (4664), 22 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states 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 21:39:53,969 INFO L175 Difference]: Start difference. First operand has 227 places, 708 transitions, 11108 flow. Second operand 21 states and 2271 transitions. [2023-01-27 21:39:53,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 2058 transitions, 32989 flow [2023-01-27 21:40:44,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 2058 transitions, 32333 flow, removed 255 selfloop flow, removed 10 redundant places. [2023-01-27 21:40:44,239 INFO L231 Difference]: Finished difference. Result has 246 places, 890 transitions, 15693 flow [2023-01-27 21:40:44,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=10582, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15693, PETRI_PLACES=246, PETRI_TRANSITIONS=890} [2023-01-27 21:40:44,240 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 208 predicate places. [2023-01-27 21:40:44,240 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 890 transitions, 15693 flow [2023-01-27 21:40:44,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.0) internal successors, (1274), 13 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states 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 21:40:44,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:40:44,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:40:44,245 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 21:40:44,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:40:44,441 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:40:44,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:40:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1656990560, now seen corresponding path program 12 times [2023-01-27 21:40:44,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:40:44,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430419632] [2023-01-27 21:40:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:40:44,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:40:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:40:44,502 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 21:40:44,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:40:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430419632] [2023-01-27 21:40:44,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430419632] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:40:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61494262] [2023-01-27 21:40:44,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:40:44,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:40:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:40:44,504 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 21:40:44,517 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 21:40:44,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:40:44,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:40:44,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:40:44,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:40:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:40:44,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:40:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:40:44,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61494262] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:40:44,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:40:44,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-27 21:40:44,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036150085] [2023-01-27 21:40:44,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:40:44,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:40:44,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:40:44,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:40:44,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:40:44,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:40:44,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 890 transitions, 15693 flow. Second operand has 13 states, 13 states have (on average 97.84615384615384) internal successors, (1272), 13 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:40:44,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:40:44,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:40:44,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:41:24,357 INFO L130 PetriNetUnfolder]: 119992/168155 cut-off events. [2023-01-27 21:41:24,358 INFO L131 PetriNetUnfolder]: For 3573220/3640633 co-relation queries the response was YES. [2023-01-27 21:41:26,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238812 conditions, 168155 events. 119992/168155 cut-off events. For 3573220/3640633 co-relation queries the response was YES. Maximal size of possible extension queue 7694. Compared 1278622 event pairs, 24151 based on Foata normal form. 30719/198701 useless extension candidates. Maximal degree in co-relation 1204497. Up to 59696 conditions per place. [2023-01-27 21:41:27,062 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 1085 selfloop transitions, 623 changer transitions 0/1716 dead transitions. [2023-01-27 21:41:27,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1716 transitions, 30098 flow [2023-01-27 21:41:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 21:41:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 21:41:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1651 transitions. [2023-01-27 21:41:27,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519182389937107 [2023-01-27 21:41:27,064 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1651 transitions. [2023-01-27 21:41:27,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1651 transitions. [2023-01-27 21:41:27,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:41:27,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1651 transitions. [2023-01-27 21:41:27,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 110.06666666666666) internal successors, (1651), 15 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states 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 21:41:27,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 212.0) internal successors, (3392), 16 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states 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 21:41:27,069 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 212.0) internal successors, (3392), 16 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states 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 21:41:27,069 INFO L175 Difference]: Start difference. First operand has 246 places, 890 transitions, 15693 flow. Second operand 15 states and 1651 transitions. [2023-01-27 21:41:27,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1716 transitions, 30098 flow [2023-01-27 21:44:00,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1716 transitions, 29389 flow, removed 323 selfloop flow, removed 5 redundant places. [2023-01-27 21:44:00,362 INFO L231 Difference]: Finished difference. Result has 260 places, 1048 transitions, 20168 flow [2023-01-27 21:44:00,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=14976, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=20168, PETRI_PLACES=260, PETRI_TRANSITIONS=1048} [2023-01-27 21:44:00,363 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 222 predicate places. [2023-01-27 21:44:00,363 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 1048 transitions, 20168 flow [2023-01-27 21:44:00,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 97.84615384615384) internal successors, (1272), 13 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states 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 21:44:00,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:44:00,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:44:00,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 21:44:00,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:44:00,570 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:44:00,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:44:00,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1096448224, now seen corresponding path program 13 times [2023-01-27 21:44:00,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:44:00,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614733329] [2023-01-27 21:44:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:44:00,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:44:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:44:00,632 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 21:44:00,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:44:00,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614733329] [2023-01-27 21:44:00,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614733329] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:44:00,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32884400] [2023-01-27 21:44:00,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:44:00,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:44:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:44:00,634 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 21:44:00,646 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 21:44:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:44:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:44:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:44:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:44:00,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:44:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:44:00,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32884400] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:44:00,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:44:00,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 21:44:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052342864] [2023-01-27 21:44:00,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:44:00,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:44:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:44:00,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:44:00,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:44:00,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-01-27 21:44:00,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 1048 transitions, 20168 flow. Second operand has 15 states, 15 states have (on average 97.53333333333333) internal successors, (1463), 15 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states 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 21:44:00,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:44:00,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-01-27 21:44:00,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand