/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/array-eq-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:36:07,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:36:07,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:36:07,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:36:07,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:36:07,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:36:07,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:36:07,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:36:07,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:36:07,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:36:07,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:36:07,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:36:07,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:36:07,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:36:07,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:36:07,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:36:07,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:36:07,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:36:07,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:36:07,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:36:07,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:36:07,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:36:07,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:36:07,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:36:07,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 19:36:07,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 19:36:07,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 19:36:07,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 19:36:07,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 19:36:07,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 19:36:07,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 19:36:07,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 19:36:07,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 19:36:07,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 19:36:07,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 19:36:07,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 19:36:07,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 19:36:07,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 19:36:07,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:36:07,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:36:07,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:36:07,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 19:36:07,120 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:36:07,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:36:07,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:36:07,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:36:07,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:36:07,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:36:07,123 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:36:07,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:36:07,123 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:36:07,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:36:07,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:36:07,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:36:07,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:36:07,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:36:07,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:36:07,125 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:36:07,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:36:07,125 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:36:07,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:36:07,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:36:07,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:36:07,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:36:07,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:36:07,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:36:07,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:36:07,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:36:07,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:36:07,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:36:07,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:36:07,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:36:07,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:36:07,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:36:07,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:36:07,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:36:07,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:36:07,406 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:36:07,409 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:36:07,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-01-27 19:36:08,914 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:36:09,173 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:36:09,173 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-01-27 19:36:09,178 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c0825733/455b8927156840e7bad964972fc20e64/FLAG08bbc0461 [2023-01-27 19:36:09,194 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c0825733/455b8927156840e7bad964972fc20e64 [2023-01-27 19:36:09,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:36:09,199 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:36:09,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:36:09,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:36:09,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:36:09,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f0645d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09, skipping insertion in model container [2023-01-27 19:36:09,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:36:09,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:36:09,475 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/array-eq-symm.wvr.c[2251,2264] [2023-01-27 19:36:09,491 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:36:09,509 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:36:09,539 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/array-eq-symm.wvr.c[2251,2264] [2023-01-27 19:36:09,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:36:09,571 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:36:09,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09 WrapperNode [2023-01-27 19:36:09,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:36:09,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:36:09,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:36:09,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:36:09,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,638 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 116 [2023-01-27 19:36:09,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:36:09,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:36:09,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:36:09,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:36:09,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,693 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:36:09,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:36:09,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:36:09,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:36:09,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (1/1) ... [2023-01-27 19:36:09,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:36:09,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:09,747 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 19:36:09,784 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 19:36:09,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:36:09,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 19:36:09,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 19:36:09,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 19:36:09,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 19:36:09,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:36:09,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:36:09,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:36:09,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 19:36:09,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:36:09,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:36:09,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:36:09,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:36:09,823 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 19:36:09,972 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:36:09,973 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:36:10,281 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:36:10,288 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:36:10,288 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-27 19:36:10,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:36:10 BoogieIcfgContainer [2023-01-27 19:36:10,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:36:10,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:36:10,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:36:10,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:36:10,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:36:09" (1/3) ... [2023-01-27 19:36:10,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee7025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:36:10, skipping insertion in model container [2023-01-27 19:36:10,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:36:09" (2/3) ... [2023-01-27 19:36:10,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee7025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:36:10, skipping insertion in model container [2023-01-27 19:36:10,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:36:10" (3/3) ... [2023-01-27 19:36:10,295 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-01-27 19:36:10,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:36:10,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:36:10,337 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:36:10,472 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:36:10,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 342 flow [2023-01-27 19:36:10,627 INFO L130 PetriNetUnfolder]: 15/161 cut-off events. [2023-01-27 19:36:10,627 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 19:36:10,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 15/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2023-01-27 19:36:10,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 163 transitions, 342 flow [2023-01-27 19:36:10,671 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 153 transitions, 318 flow [2023-01-27 19:36:10,673 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:36:10,694 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 153 transitions, 318 flow [2023-01-27 19:36:10,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 153 transitions, 318 flow [2023-01-27 19:36:10,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 153 transitions, 318 flow [2023-01-27 19:36:10,783 INFO L130 PetriNetUnfolder]: 15/153 cut-off events. [2023-01-27 19:36:10,784 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 19:36:10,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 15/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2023-01-27 19:36:10,802 INFO L119 LiptonReduction]: Number of co-enabled transitions 992 [2023-01-27 19:36:15,596 INFO L134 LiptonReduction]: Checked pairs total: 1281 [2023-01-27 19:36:15,597 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-01-27 19:36:15,624 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:36:15,632 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;@33cebc1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:36:15,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 19:36:15,649 INFO L130 PetriNetUnfolder]: 5/18 cut-off events. [2023-01-27 19:36:15,649 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 19:36:15,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:15,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:15,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:15,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:15,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1496650072, now seen corresponding path program 1 times [2023-01-27 19:36:15,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:15,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344664638] [2023-01-27 19:36:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:15,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:16,212 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 19:36:16,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:16,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344664638] [2023-01-27 19:36:16,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344664638] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:36:16,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:36:16,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:36:16,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987105242] [2023-01-27 19:36:16,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:36:16,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:36:16,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:36:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:36:16,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2023-01-27 19:36:16,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:16,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2023-01-27 19:36:16,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:16,346 INFO L130 PetriNetUnfolder]: 71/121 cut-off events. [2023-01-27 19:36:16,346 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-27 19:36:16,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 121 events. 71/121 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 274 event pairs, 15 based on Foata normal form. 1/80 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2023-01-27 19:36:16,350 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-01-27 19:36:16,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 31 transitions, 145 flow [2023-01-27 19:36:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:36:16,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:36:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-01-27 19:36:16,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44650205761316875 [2023-01-27 19:36:16,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-01-27 19:36:16,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-01-27 19:36:16,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:16,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-01-27 19:36:16,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,410 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 50 flow. Second operand 3 states and 434 transitions. [2023-01-27 19:36:16,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 31 transitions, 145 flow [2023-01-27 19:36:16,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 19:36:16,414 INFO L231 Difference]: Finished difference. Result has 20 places, 21 transitions, 61 flow [2023-01-27 19:36:16,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=21} [2023-01-27 19:36:16,420 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-27 19:36:16,420 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 21 transitions, 61 flow [2023-01-27 19:36:16,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:16,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:16,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:36:16,421 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:16,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1210615754, now seen corresponding path program 1 times [2023-01-27 19:36:16,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:16,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241319161] [2023-01-27 19:36:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:16,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:16,612 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 19:36:16,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:16,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241319161] [2023-01-27 19:36:16,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241319161] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:36:16,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:36:16,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 19:36:16,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708026576] [2023-01-27 19:36:16,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:36:16,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 19:36:16,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:16,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 19:36:16,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 19:36:16,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-27 19:36:16,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 21 transitions, 61 flow. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:16,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-27 19:36:16,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:16,750 INFO L130 PetriNetUnfolder]: 125/225 cut-off events. [2023-01-27 19:36:16,750 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2023-01-27 19:36:16,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 225 events. 125/225 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 675 event pairs, 71 based on Foata normal form. 16/213 useless extension candidates. Maximal degree in co-relation 200. Up to 122 conditions per place. [2023-01-27 19:36:16,752 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 36 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-01-27 19:36:16,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 186 flow [2023-01-27 19:36:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 19:36:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 19:36:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2023-01-27 19:36:16,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38040123456790126 [2023-01-27 19:36:16,754 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 493 transitions. [2023-01-27 19:36:16,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 493 transitions. [2023-01-27 19:36:16,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:16,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 493 transitions. [2023-01-27 19:36:16,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,758 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,758 INFO L175 Difference]: Start difference. First operand has 20 places, 21 transitions, 61 flow. Second operand 4 states and 493 transitions. [2023-01-27 19:36:16,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 186 flow [2023-01-27 19:36:16,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:36:16,760 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 80 flow [2023-01-27 19:36:16,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2023-01-27 19:36:16,760 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2023-01-27 19:36:16,760 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 80 flow [2023-01-27 19:36:16,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:16,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:16,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:36:16,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:16,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash 991297935, now seen corresponding path program 1 times [2023-01-27 19:36:16,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:16,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557452786] [2023-01-27 19:36:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:16,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:16,929 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 19:36:16,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:16,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557452786] [2023-01-27 19:36:16,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557452786] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:36:16,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:36:16,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 19:36:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910719826] [2023-01-27 19:36:16,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:36:16,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 19:36:16,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:16,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 19:36:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 19:36:16,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-27 19:36:16,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:16,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:16,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-27 19:36:16,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:17,024 INFO L130 PetriNetUnfolder]: 81/151 cut-off events. [2023-01-27 19:36:17,024 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2023-01-27 19:36:17,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 151 events. 81/151 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 397 event pairs, 45 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 294. Up to 122 conditions per place. [2023-01-27 19:36:17,027 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 20 selfloop transitions, 2 changer transitions 12/34 dead transitions. [2023-01-27 19:36:17,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 34 transitions, 174 flow [2023-01-27 19:36:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 19:36:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 19:36:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-01-27 19:36:17,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3773148148148148 [2023-01-27 19:36:17,029 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-01-27 19:36:17,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-01-27 19:36:17,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:17,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-01-27 19:36:17,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,032 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,032 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 80 flow. Second operand 4 states and 489 transitions. [2023-01-27 19:36:17,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 34 transitions, 174 flow [2023-01-27 19:36:17,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 168 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-27 19:36:17,049 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 74 flow [2023-01-27 19:36:17,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-01-27 19:36:17,051 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-01-27 19:36:17,053 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 74 flow [2023-01-27 19:36:17,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:17,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:17,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:36:17,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:17,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash -369944271, now seen corresponding path program 1 times [2023-01-27 19:36:17,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:17,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371205240] [2023-01-27 19:36:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:17,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:17,182 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 19:36:17,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:17,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371205240] [2023-01-27 19:36:17,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371205240] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:36:17,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:36:17,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 19:36:17,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296825482] [2023-01-27 19:36:17,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:36:17,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 19:36:17,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 19:36:17,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:36:17,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-27 19:36:17,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:17,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-27 19:36:17,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:17,316 INFO L130 PetriNetUnfolder]: 150/268 cut-off events. [2023-01-27 19:36:17,316 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2023-01-27 19:36:17,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 268 events. 150/268 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 851 event pairs, 70 based on Foata normal form. 16/281 useless extension candidates. Maximal degree in co-relation 639. Up to 106 conditions per place. [2023-01-27 19:36:17,318 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 43 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-01-27 19:36:17,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 248 flow [2023-01-27 19:36:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:36:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:36:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 616 transitions. [2023-01-27 19:36:17,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802469135802469 [2023-01-27 19:36:17,320 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 616 transitions. [2023-01-27 19:36:17,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 616 transitions. [2023-01-27 19:36:17,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:17,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 616 transitions. [2023-01-27 19:36:17,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,327 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,327 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 74 flow. Second operand 5 states and 616 transitions. [2023-01-27 19:36:17,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 248 flow [2023-01-27 19:36:17,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 49 transitions, 236 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-01-27 19:36:17,330 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 103 flow [2023-01-27 19:36:17,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-01-27 19:36:17,337 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-01-27 19:36:17,338 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 103 flow [2023-01-27 19:36:17,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:17,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:17,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:36:17,338 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:17,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash 631656796, now seen corresponding path program 1 times [2023-01-27 19:36:17,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:17,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816761100] [2023-01-27 19:36:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:17,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:17,617 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 19:36:17,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:17,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816761100] [2023-01-27 19:36:17,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816761100] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:36:17,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:36:17,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 19:36:17,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139241596] [2023-01-27 19:36:17,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:36:17,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 19:36:17,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:17,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 19:36:17,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:36:17,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-27 19:36:17,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:17,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-27 19:36:17,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:17,742 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2023-01-27 19:36:17,742 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-01-27 19:36:17,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 238 events. 132/238 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 712 event pairs, 54 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 603. Up to 113 conditions per place. [2023-01-27 19:36:17,744 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 32 selfloop transitions, 5 changer transitions 10/47 dead transitions. [2023-01-27 19:36:17,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 258 flow [2023-01-27 19:36:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:36:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:36:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 614 transitions. [2023-01-27 19:36:17,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790123456790123 [2023-01-27 19:36:17,746 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 614 transitions. [2023-01-27 19:36:17,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 614 transitions. [2023-01-27 19:36:17,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:17,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 614 transitions. [2023-01-27 19:36:17,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,771 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,771 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 103 flow. Second operand 5 states and 614 transitions. [2023-01-27 19:36:17,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 258 flow [2023-01-27 19:36:17,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 248 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-27 19:36:17,775 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 113 flow [2023-01-27 19:36:17,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-01-27 19:36:17,777 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-01-27 19:36:17,777 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 113 flow [2023-01-27 19:36:17,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:17,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:17,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:17,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:36:17,778 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:17,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:17,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1758776951, now seen corresponding path program 1 times [2023-01-27 19:36:17,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:17,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150047152] [2023-01-27 19:36:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:17,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:36:18,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150047152] [2023-01-27 19:36:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150047152] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102571400] [2023-01-27 19:36:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:18,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:18,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:18,037 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 19:36:18,059 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 19:36:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:18,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 19:36:18,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:36:18,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:36:18,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102571400] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:18,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 19:36:18,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-01-27 19:36:18,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45056333] [2023-01-27 19:36:18,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:36:18,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:36:18,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:36:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-27 19:36:18,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 324 [2023-01-27 19:36:18,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:18,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:18,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 324 [2023-01-27 19:36:18,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:18,558 INFO L130 PetriNetUnfolder]: 125/235 cut-off events. [2023-01-27 19:36:18,558 INFO L131 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2023-01-27 19:36:18,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 235 events. 125/235 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 756 event pairs, 41 based on Foata normal form. 10/244 useless extension candidates. Maximal degree in co-relation 629. Up to 85 conditions per place. [2023-01-27 19:36:18,560 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-01-27 19:36:18,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 271 flow [2023-01-27 19:36:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 19:36:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 19:36:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 820 transitions. [2023-01-27 19:36:18,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36155202821869487 [2023-01-27 19:36:18,562 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 820 transitions. [2023-01-27 19:36:18,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 820 transitions. [2023-01-27 19:36:18,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:18,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 820 transitions. [2023-01-27 19:36:18,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 117.14285714285714) internal successors, (820), 7 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:18,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:18,572 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:18,573 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 113 flow. Second operand 7 states and 820 transitions. [2023-01-27 19:36:18,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 271 flow [2023-01-27 19:36:18,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 262 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-27 19:36:18,579 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 136 flow [2023-01-27 19:36:18,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=136, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-01-27 19:36:18,581 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-01-27 19:36:18,581 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 136 flow [2023-01-27 19:36:18,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:18,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:18,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:18,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 19:36:18,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 19:36:18,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:18,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash 721061444, now seen corresponding path program 1 times [2023-01-27 19:36:18,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:18,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118508547] [2023-01-27 19:36:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:19,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:19,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118508547] [2023-01-27 19:36:19,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118508547] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:19,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318504346] [2023-01-27 19:36:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:19,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:19,329 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 19:36:19,391 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 19:36:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 19:36:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:19,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:19,931 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:36:19,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:36:19,966 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:36:19,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:36:19,973 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:36:19,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:36:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:20,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318504346] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:20,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 19:36:20,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 18 [2023-01-27 19:36:20,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855070811] [2023-01-27 19:36:20,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:36:20,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 19:36:20,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 19:36:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-01-27 19:36:20,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 324 [2023-01-27 19:36:20,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 136 flow. Second operand has 8 states, 8 states have (on average 94.125) internal successors, (753), 8 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:20,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:20,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 324 [2023-01-27 19:36:20,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:20,337 INFO L130 PetriNetUnfolder]: 138/255 cut-off events. [2023-01-27 19:36:20,337 INFO L131 PetriNetUnfolder]: For 255/255 co-relation queries the response was YES. [2023-01-27 19:36:20,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765 conditions, 255 events. 138/255 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 844 event pairs, 30 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 735. Up to 198 conditions per place. [2023-01-27 19:36:20,338 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 29 selfloop transitions, 11 changer transitions 4/44 dead transitions. [2023-01-27 19:36:20,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 278 flow [2023-01-27 19:36:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 19:36:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 19:36:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 778 transitions. [2023-01-27 19:36:20,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3001543209876543 [2023-01-27 19:36:20,341 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 778 transitions. [2023-01-27 19:36:20,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 778 transitions. [2023-01-27 19:36:20,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:20,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 778 transitions. [2023-01-27 19:36:20,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.25) internal successors, (778), 8 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:20,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:20,346 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:20,346 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 136 flow. Second operand 8 states and 778 transitions. [2023-01-27 19:36:20,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 278 flow [2023-01-27 19:36:20,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 260 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-01-27 19:36:20,348 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 185 flow [2023-01-27 19:36:20,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-01-27 19:36:20,348 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-01-27 19:36:20,349 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 185 flow [2023-01-27 19:36:20,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 94.125) internal successors, (753), 8 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:20,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:20,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:20,400 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 19:36:20,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-01-27 19:36:20,554 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:20,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:20,555 INFO L85 PathProgramCache]: Analyzing trace with hash -867319260, now seen corresponding path program 2 times [2023-01-27 19:36:20,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:20,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370338149] [2023-01-27 19:36:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:20,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:21,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:21,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370338149] [2023-01-27 19:36:21,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370338149] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:21,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611759414] [2023-01-27 19:36:21,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:36:21,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:21,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:21,162 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 19:36:21,236 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 19:36:21,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:36:21,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:21,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 19:36:21,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:21,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:21,637 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 19:36:21,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 80 [2023-01-27 19:36:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:21,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611759414] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:21,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 19:36:21,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-01-27 19:36:21,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443573024] [2023-01-27 19:36:21,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:36:21,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 19:36:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:21,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 19:36:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-27 19:36:21,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 324 [2023-01-27 19:36:21,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 185 flow. Second operand has 8 states, 8 states have (on average 94.125) internal successors, (753), 8 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:21,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:21,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 324 [2023-01-27 19:36:21,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:21,965 INFO L130 PetriNetUnfolder]: 133/248 cut-off events. [2023-01-27 19:36:21,965 INFO L131 PetriNetUnfolder]: For 319/319 co-relation queries the response was YES. [2023-01-27 19:36:21,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 248 events. 133/248 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 805 event pairs, 35 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 842. Up to 196 conditions per place. [2023-01-27 19:36:21,967 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 30 selfloop transitions, 10 changer transitions 7/47 dead transitions. [2023-01-27 19:36:21,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 346 flow [2023-01-27 19:36:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 19:36:21,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 19:36:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2023-01-27 19:36:21,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29976851851851855 [2023-01-27 19:36:21,969 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2023-01-27 19:36:21,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2023-01-27 19:36:21,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:21,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2023-01-27 19:36:21,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:21,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:21,973 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:21,973 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 185 flow. Second operand 8 states and 777 transitions. [2023-01-27 19:36:21,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 346 flow [2023-01-27 19:36:21,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 318 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-01-27 19:36:21,976 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 212 flow [2023-01-27 19:36:21,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-01-27 19:36:21,977 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-01-27 19:36:21,978 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 212 flow [2023-01-27 19:36:21,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 94.125) internal successors, (753), 8 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:21,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:21,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:21,986 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 19:36:22,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:22,184 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:22,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1485650043, now seen corresponding path program 1 times [2023-01-27 19:36:22,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:22,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6604057] [2023-01-27 19:36:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:22,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:22,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:22,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6604057] [2023-01-27 19:36:22,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6604057] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:36:22,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:36:22,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 19:36:22,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680984056] [2023-01-27 19:36:22,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:36:22,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 19:36:22,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:22,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 19:36:22,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-01-27 19:36:22,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 324 [2023-01-27 19:36:22,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 105.88888888888889) internal successors, (953), 9 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:22,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:22,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 324 [2023-01-27 19:36:22,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:23,109 INFO L130 PetriNetUnfolder]: 126/239 cut-off events. [2023-01-27 19:36:23,109 INFO L131 PetriNetUnfolder]: For 344/344 co-relation queries the response was YES. [2023-01-27 19:36:23,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 239 events. 126/239 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 777 event pairs, 38 based on Foata normal form. 4/242 useless extension candidates. Maximal degree in co-relation 847. Up to 192 conditions per place. [2023-01-27 19:36:23,111 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 30 selfloop transitions, 8 changer transitions 10/48 dead transitions. [2023-01-27 19:36:23,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 369 flow [2023-01-27 19:36:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:36:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:36:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2023-01-27 19:36:23,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345679012345679 [2023-01-27 19:36:23,113 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2023-01-27 19:36:23,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2023-01-27 19:36:23,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:23,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2023-01-27 19:36:23,114 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 19:36:23,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:23,116 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:23,116 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 212 flow. Second operand 5 states and 560 transitions. [2023-01-27 19:36:23,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 369 flow [2023-01-27 19:36:23,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 354 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-01-27 19:36:23,119 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 225 flow [2023-01-27 19:36:23,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-01-27 19:36:23,120 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-27 19:36:23,120 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 225 flow [2023-01-27 19:36:23,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.88888888888889) internal successors, (953), 9 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:23,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:23,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:23,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:36:23,121 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:23,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:23,121 INFO L85 PathProgramCache]: Analyzing trace with hash -708957346, now seen corresponding path program 3 times [2023-01-27 19:36:23,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:23,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127911791] [2023-01-27 19:36:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:23,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:23,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:23,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127911791] [2023-01-27 19:36:23,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127911791] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:23,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86068505] [2023-01-27 19:36:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:36:23,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:23,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:23,609 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 19:36:23,644 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 19:36:23,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 19:36:23,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 19:36:23,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:23,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:24,102 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:36:24,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:36:24,138 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:36:24,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:36:24,144 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:36:24,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:36:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:24,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86068505] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:24,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:24,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-01-27 19:36:24,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286298706] [2023-01-27 19:36:24,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:24,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 19:36:24,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 19:36:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-01-27 19:36:24,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:36:24,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 225 flow. Second operand has 18 states, 18 states have (on average 89.88888888888889) internal successors, (1618), 18 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:24,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:24,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:36:24,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:24,645 INFO L130 PetriNetUnfolder]: 135/253 cut-off events. [2023-01-27 19:36:24,647 INFO L131 PetriNetUnfolder]: For 424/424 co-relation queries the response was YES. [2023-01-27 19:36:24,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 253 events. 135/253 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 839 event pairs, 6 based on Foata normal form. 12/264 useless extension candidates. Maximal degree in co-relation 924. Up to 196 conditions per place. [2023-01-27 19:36:24,649 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-01-27 19:36:24,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 371 flow [2023-01-27 19:36:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 19:36:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 19:36:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 835 transitions. [2023-01-27 19:36:24,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28635116598079563 [2023-01-27 19:36:24,652 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 835 transitions. [2023-01-27 19:36:24,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 835 transitions. [2023-01-27 19:36:24,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:24,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 835 transitions. [2023-01-27 19:36:24,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.77777777777777) internal successors, (835), 9 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:24,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:24,656 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:24,657 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 225 flow. Second operand 9 states and 835 transitions. [2023-01-27 19:36:24,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 371 flow [2023-01-27 19:36:24,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 362 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:36:24,659 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 265 flow [2023-01-27 19:36:24,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=265, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-01-27 19:36:24,660 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-01-27 19:36:24,660 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 265 flow [2023-01-27 19:36:24,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 89.88888888888889) internal successors, (1618), 18 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:24,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:24,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:24,696 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 19:36:24,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:24,887 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:24,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:24,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1100878043, now seen corresponding path program 2 times [2023-01-27 19:36:24,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:24,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105534859] [2023-01-27 19:36:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:24,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:25,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:25,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105534859] [2023-01-27 19:36:25,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105534859] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:25,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738682852] [2023-01-27 19:36:25,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:36:25,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:25,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:25,436 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 19:36:25,506 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 19:36:25,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:36:25,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:25,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-27 19:36:25,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:25,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:25,819 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:36:25,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:36:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:25,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738682852] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:25,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:25,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-01-27 19:36:25,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331121268] [2023-01-27 19:36:25,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:25,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 19:36:25,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:25,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 19:36:25,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:36:25,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-27 19:36:25,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 114.9090909090909) internal successors, (1264), 11 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:25,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:25,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-27 19:36:25,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:26,000 INFO L130 PetriNetUnfolder]: 141/263 cut-off events. [2023-01-27 19:36:26,001 INFO L131 PetriNetUnfolder]: For 673/673 co-relation queries the response was YES. [2023-01-27 19:36:26,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 263 events. 141/263 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 872 event pairs, 49 based on Foata normal form. 4/267 useless extension candidates. Maximal degree in co-relation 1045. Up to 230 conditions per place. [2023-01-27 19:36:26,002 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 33 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2023-01-27 19:36:26,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 385 flow [2023-01-27 19:36:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:36:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:36:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 596 transitions. [2023-01-27 19:36:26,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36790123456790125 [2023-01-27 19:36:26,004 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 596 transitions. [2023-01-27 19:36:26,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 596 transitions. [2023-01-27 19:36:26,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:26,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 596 transitions. [2023-01-27 19:36:26,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.2) internal successors, (596), 5 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:26,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:26,007 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:26,007 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 265 flow. Second operand 5 states and 596 transitions. [2023-01-27 19:36:26,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 385 flow [2023-01-27 19:36:26,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 360 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 19:36:26,011 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 274 flow [2023-01-27 19:36:26,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-01-27 19:36:26,011 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-01-27 19:36:26,011 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 274 flow [2023-01-27 19:36:26,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 114.9090909090909) internal successors, (1264), 11 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:26,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:26,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:26,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 19:36:26,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-27 19:36:26,217 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:26,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:26,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2141083410, now seen corresponding path program 4 times [2023-01-27 19:36:26,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:26,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128515379] [2023-01-27 19:36:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:26,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:27,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:27,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128515379] [2023-01-27 19:36:27,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128515379] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:27,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033645529] [2023-01-27 19:36:27,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:36:27,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:27,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:27,033 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 19:36:27,065 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 19:36:27,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:36:27,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:27,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-27 19:36:27,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:27,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 19:36:27,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:36:27,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:36:27,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:36:27,424 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 19:36:27,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-01-27 19:36:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:36:27,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:27,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:36:27,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2023-01-27 19:36:27,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:36:27,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 82 [2023-01-27 19:36:27,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:36:27,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 55 [2023-01-27 19:36:27,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:36:27,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 70 [2023-01-27 19:36:27,891 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-27 19:36:27,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 508 treesize of output 473 [2023-01-27 19:36:27,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:36:27,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 254 [2023-01-27 19:36:27,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:36:27,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 316 treesize of output 308 [2023-01-27 19:36:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:36:30,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033645529] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:30,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:30,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2023-01-27 19:36:30,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137860629] [2023-01-27 19:36:30,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:30,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 19:36:30,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:30,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 19:36:30,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=427, Unknown=4, NotChecked=0, Total=506 [2023-01-27 19:36:30,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-01-27 19:36:30,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 274 flow. Second operand has 23 states, 23 states have (on average 81.65217391304348) internal successors, (1878), 23 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:30,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:30,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-01-27 19:36:30,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:30,619 INFO L130 PetriNetUnfolder]: 172/329 cut-off events. [2023-01-27 19:36:30,619 INFO L131 PetriNetUnfolder]: For 819/819 co-relation queries the response was YES. [2023-01-27 19:36:30,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 329 events. 172/329 cut-off events. For 819/819 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1251 event pairs, 6 based on Foata normal form. 20/349 useless extension candidates. Maximal degree in co-relation 1289. Up to 157 conditions per place. [2023-01-27 19:36:30,621 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 45 selfloop transitions, 17 changer transitions 1/63 dead transitions. [2023-01-27 19:36:30,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 515 flow [2023-01-27 19:36:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 19:36:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 19:36:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 777 transitions. [2023-01-27 19:36:30,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2664609053497942 [2023-01-27 19:36:30,624 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 777 transitions. [2023-01-27 19:36:30,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 777 transitions. [2023-01-27 19:36:30,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:30,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 777 transitions. [2023-01-27 19:36:30,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 86.33333333333333) internal successors, (777), 9 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:30,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:30,628 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 324.0) internal successors, (3240), 10 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:30,628 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 274 flow. Second operand 9 states and 777 transitions. [2023-01-27 19:36:30,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 515 flow [2023-01-27 19:36:30,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 497 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 19:36:30,646 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 336 flow [2023-01-27 19:36:30,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=336, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-01-27 19:36:30,647 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-01-27 19:36:30,647 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 336 flow [2023-01-27 19:36:30,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.65217391304348) internal successors, (1878), 23 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:30,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:30,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:30,656 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 19:36:30,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:30,854 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:30,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1109515910, now seen corresponding path program 5 times [2023-01-27 19:36:30,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:30,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618837582] [2023-01-27 19:36:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:30,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:31,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618837582] [2023-01-27 19:36:31,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618837582] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557915724] [2023-01-27 19:36:31,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 19:36:31,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:31,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:31,537 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 19:36:31,600 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 19:36:31,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:36:31,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:31,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 19:36:31,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:31,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:36:31,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 19:36:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:31,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:32,101 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse4 (forall ((v_ArrVal_369 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_369) ~B~0.base) (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork1_#t~mem1|))))) (and (forall ((v_ArrVal_369 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_369))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select .cse2 (+ .cse1 ~B~0.offset)))) (not (= (select .cse2 (+ ~B~0.offset .cse3)) |c_thread1Thread1of1ForFork1_#t~mem1|)))))) (or (< c_~i_BA~0 c_~Bn~0) .cse4) (or (< c_~i_BA~0 c_~An~0) .cse4)))) is different from false [2023-01-27 19:36:32,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:36:32,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-01-27 19:36:32,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-27 19:36:32,164 INFO L321 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-01-27 19:36:32,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 151 [2023-01-27 19:36:32,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:36:32,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 92 [2023-01-27 19:36:32,343 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:36:32,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-01-27 19:36:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:32,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557915724] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:32,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 19:36:32,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-01-27 19:36:32,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025073080] [2023-01-27 19:36:32,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:36:32,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 19:36:32,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:32,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 19:36:32,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=393, Unknown=1, NotChecked=40, Total=506 [2023-01-27 19:36:32,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-01-27 19:36:32,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 336 flow. Second operand has 9 states, 9 states have (on average 85.88888888888889) internal successors, (773), 9 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:32,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:32,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-01-27 19:36:32,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:42,920 WARN L222 SmtUtils]: Spent 10.30s on a formula simplification. DAG size of input: 61 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 19:36:45,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 19:36:45,503 INFO L130 PetriNetUnfolder]: 164/297 cut-off events. [2023-01-27 19:36:45,503 INFO L131 PetriNetUnfolder]: For 1186/1186 co-relation queries the response was YES. [2023-01-27 19:36:45,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 297 events. 164/297 cut-off events. For 1186/1186 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1008 event pairs, 27 based on Foata normal form. 2/299 useless extension candidates. Maximal degree in co-relation 1381. Up to 271 conditions per place. [2023-01-27 19:36:45,511 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 30 selfloop transitions, 16 changer transitions 3/49 dead transitions. [2023-01-27 19:36:45,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 49 transitions, 476 flow [2023-01-27 19:36:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 19:36:45,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 19:36:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 879 transitions. [2023-01-27 19:36:45,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2712962962962963 [2023-01-27 19:36:45,513 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 879 transitions. [2023-01-27 19:36:45,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 879 transitions. [2023-01-27 19:36:45,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:45,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 879 transitions. [2023-01-27 19:36:45,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.9) internal successors, (879), 10 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:45,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:45,518 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:45,518 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 336 flow. Second operand 10 states and 879 transitions. [2023-01-27 19:36:45,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 49 transitions, 476 flow [2023-01-27 19:36:45,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 49 transitions, 432 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-01-27 19:36:45,537 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 348 flow [2023-01-27 19:36:45,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=348, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2023-01-27 19:36:45,538 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-01-27 19:36:45,538 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 348 flow [2023-01-27 19:36:45,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.88888888888889) internal successors, (773), 9 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:45,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:45,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:45,558 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 19:36:45,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:45,744 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:45,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:45,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1778420361, now seen corresponding path program 3 times [2023-01-27 19:36:45,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:45,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390317556] [2023-01-27 19:36:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:45,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:46,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:46,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390317556] [2023-01-27 19:36:46,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390317556] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:46,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389778101] [2023-01-27 19:36:46,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:36:46,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:46,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:46,099 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 19:36:46,165 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 19:36:46,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 19:36:46,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:46,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-27 19:36:46,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:46,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:46,424 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:36:46,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:36:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:46,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389778101] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:46,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:46,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-01-27 19:36:46,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774005244] [2023-01-27 19:36:46,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:46,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 19:36:46,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 19:36:46,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:36:46,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-27 19:36:46,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 348 flow. Second operand has 11 states, 11 states have (on average 114.9090909090909) internal successors, (1264), 11 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:46,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:46,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-27 19:36:46,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:46,591 INFO L130 PetriNetUnfolder]: 168/301 cut-off events. [2023-01-27 19:36:46,591 INFO L131 PetriNetUnfolder]: For 953/953 co-relation queries the response was YES. [2023-01-27 19:36:46,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 301 events. 168/301 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1028 event pairs, 24 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 1402. Up to 225 conditions per place. [2023-01-27 19:36:46,593 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 43 selfloop transitions, 13 changer transitions 0/56 dead transitions. [2023-01-27 19:36:46,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 541 flow [2023-01-27 19:36:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:36:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:36:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 713 transitions. [2023-01-27 19:36:46,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36676954732510286 [2023-01-27 19:36:46,595 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 713 transitions. [2023-01-27 19:36:46,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 713 transitions. [2023-01-27 19:36:46,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:46,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 713 transitions. [2023-01-27 19:36:46,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.83333333333333) internal successors, (713), 6 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:46,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:46,608 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:46,608 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 348 flow. Second operand 6 states and 713 transitions. [2023-01-27 19:36:46,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 541 flow [2023-01-27 19:36:46,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 505 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-01-27 19:36:46,612 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 352 flow [2023-01-27 19:36:46,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-01-27 19:36:46,612 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-01-27 19:36:46,612 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 352 flow [2023-01-27 19:36:46,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 114.9090909090909) internal successors, (1264), 11 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:46,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:46,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:46,620 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 19:36:46,818 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,SelfDestructingSolverStorable13 [2023-01-27 19:36:46,818 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:46,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:46,819 INFO L85 PathProgramCache]: Analyzing trace with hash -292123197, now seen corresponding path program 4 times [2023-01-27 19:36:46,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:46,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039952602] [2023-01-27 19:36:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:46,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:47,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:47,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039952602] [2023-01-27 19:36:47,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039952602] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:47,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314453099] [2023-01-27 19:36:47,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:36:47,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:47,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:47,283 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 19:36:47,297 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 19:36:47,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:36:47,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:47,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 19:36:47,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:47,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:36:47,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 19:36:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:47,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:47,641 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_446 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1))))) (= (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|))))) is different from false [2023-01-27 19:36:47,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:36:47,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 168 [2023-01-27 19:36:47,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:36:47,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 86 [2023-01-27 19:36:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:48,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314453099] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:48,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:48,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2023-01-27 19:36:48,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979315884] [2023-01-27 19:36:48,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:48,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 19:36:48,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:48,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 19:36:48,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=220, Unknown=1, NotChecked=30, Total=306 [2023-01-27 19:36:48,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-01-27 19:36:48,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 352 flow. Second operand has 18 states, 18 states have (on average 110.22222222222223) internal successors, (1984), 18 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:48,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:48,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-01-27 19:36:48,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:48,780 INFO L130 PetriNetUnfolder]: 158/281 cut-off events. [2023-01-27 19:36:48,780 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2023-01-27 19:36:48,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 281 events. 158/281 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 912 event pairs, 40 based on Foata normal form. 4/285 useless extension candidates. Maximal degree in co-relation 1347. Up to 243 conditions per place. [2023-01-27 19:36:48,782 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 38 selfloop transitions, 12 changer transitions 0/50 dead transitions. [2023-01-27 19:36:48,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 492 flow [2023-01-27 19:36:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:36:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:36:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 682 transitions. [2023-01-27 19:36:48,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508230452674897 [2023-01-27 19:36:48,784 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 682 transitions. [2023-01-27 19:36:48,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 682 transitions. [2023-01-27 19:36:48,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:48,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 682 transitions. [2023-01-27 19:36:48,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:48,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:48,787 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:48,787 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 352 flow. Second operand 6 states and 682 transitions. [2023-01-27 19:36:48,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 492 flow [2023-01-27 19:36:48,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 446 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-01-27 19:36:48,792 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 337 flow [2023-01-27 19:36:48,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-01-27 19:36:48,793 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2023-01-27 19:36:48,793 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 337 flow [2023-01-27 19:36:48,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.22222222222223) internal successors, (1984), 18 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:48,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:48,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:48,803 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 19:36:48,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 19:36:48,999 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:48,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:48,999 INFO L85 PathProgramCache]: Analyzing trace with hash -705701550, now seen corresponding path program 1 times [2023-01-27 19:36:49,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:49,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867835942] [2023-01-27 19:36:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:49,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:49,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:49,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867835942] [2023-01-27 19:36:49,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867835942] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:49,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075082194] [2023-01-27 19:36:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:49,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:49,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:49,173 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 19:36:49,177 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 19:36:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:49,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 19:36:49,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:49,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:49,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075082194] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:49,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:49,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-01-27 19:36:49,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003161952] [2023-01-27 19:36:49,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:49,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:36:49,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:49,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:36:49,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:36:49,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2023-01-27 19:36:49,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 139.28571428571428) internal successors, (975), 7 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:49,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:49,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2023-01-27 19:36:49,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:49,645 INFO L130 PetriNetUnfolder]: 260/474 cut-off events. [2023-01-27 19:36:49,645 INFO L131 PetriNetUnfolder]: For 1455/1455 co-relation queries the response was YES. [2023-01-27 19:36:49,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 474 events. 260/474 cut-off events. For 1455/1455 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1864 event pairs, 14 based on Foata normal form. 4/478 useless extension candidates. Maximal degree in co-relation 2165. Up to 224 conditions per place. [2023-01-27 19:36:49,648 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 67 selfloop transitions, 17 changer transitions 2/86 dead transitions. [2023-01-27 19:36:49,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 756 flow [2023-01-27 19:36:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 19:36:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 19:36:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1006 transitions. [2023-01-27 19:36:49,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435626102292769 [2023-01-27 19:36:49,651 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1006 transitions. [2023-01-27 19:36:49,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1006 transitions. [2023-01-27 19:36:49,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:49,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1006 transitions. [2023-01-27 19:36:49,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.71428571428572) internal successors, (1006), 7 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:49,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:49,656 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:49,656 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 337 flow. Second operand 7 states and 1006 transitions. [2023-01-27 19:36:49,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 756 flow [2023-01-27 19:36:49,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 727 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-01-27 19:36:49,660 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 431 flow [2023-01-27 19:36:49,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-01-27 19:36:49,660 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-01-27 19:36:49,660 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 431 flow [2023-01-27 19:36:49,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.28571428571428) internal successors, (975), 7 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:49,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:49,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:49,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 19:36:49,866 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,SelfDestructingSolverStorable15 [2023-01-27 19:36:49,866 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:49,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:49,867 INFO L85 PathProgramCache]: Analyzing trace with hash -113070510, now seen corresponding path program 2 times [2023-01-27 19:36:49,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:49,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957637226] [2023-01-27 19:36:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:49,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:50,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:50,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957637226] [2023-01-27 19:36:50,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957637226] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:50,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117714247] [2023-01-27 19:36:50,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:36:50,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:50,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:50,029 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 19:36:50,059 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 19:36:50,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:36:50,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:50,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 19:36:50,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:50,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 19:36:50,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117714247] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:50,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:50,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-01-27 19:36:50,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059587290] [2023-01-27 19:36:50,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:50,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:36:50,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:36:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:36:50,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2023-01-27 19:36:50,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 431 flow. Second operand has 7 states, 7 states have (on average 139.28571428571428) internal successors, (975), 7 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:50,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:50,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2023-01-27 19:36:50,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:50,518 INFO L130 PetriNetUnfolder]: 380/690 cut-off events. [2023-01-27 19:36:50,518 INFO L131 PetriNetUnfolder]: For 2640/2640 co-relation queries the response was YES. [2023-01-27 19:36:50,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3367 conditions, 690 events. 380/690 cut-off events. For 2640/2640 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3052 event pairs, 74 based on Foata normal form. 4/694 useless extension candidates. Maximal degree in co-relation 3330. Up to 474 conditions per place. [2023-01-27 19:36:50,522 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 71 selfloop transitions, 18 changer transitions 2/91 dead transitions. [2023-01-27 19:36:50,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 91 transitions, 873 flow [2023-01-27 19:36:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 19:36:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 19:36:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1001 transitions. [2023-01-27 19:36:50,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44135802469135804 [2023-01-27 19:36:50,525 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1001 transitions. [2023-01-27 19:36:50,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1001 transitions. [2023-01-27 19:36:50,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:50,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1001 transitions. [2023-01-27 19:36:50,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:50,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:50,530 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 324.0) internal successors, (2592), 8 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:50,530 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 431 flow. Second operand 7 states and 1001 transitions. [2023-01-27 19:36:50,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 91 transitions, 873 flow [2023-01-27 19:36:50,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 847 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-01-27 19:36:50,535 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 563 flow [2023-01-27 19:36:50,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-01-27 19:36:50,535 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-01-27 19:36:50,535 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 563 flow [2023-01-27 19:36:50,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.28571428571428) internal successors, (975), 7 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:50,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:50,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:50,551 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 19:36:50,752 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,SelfDestructingSolverStorable16 [2023-01-27 19:36:50,753 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:50,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:50,753 INFO L85 PathProgramCache]: Analyzing trace with hash -604771874, now seen corresponding path program 3 times [2023-01-27 19:36:50,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:50,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089918690] [2023-01-27 19:36:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:50,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:50,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:50,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089918690] [2023-01-27 19:36:50,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089918690] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:50,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494041066] [2023-01-27 19:36:50,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:36:50,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:50,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:50,868 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 19:36:50,870 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 19:36:50,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 19:36:50,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:50,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 19:36:50,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:51,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:51,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494041066] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:51,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:51,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-01-27 19:36:51,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484925838] [2023-01-27 19:36:51,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:51,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 19:36:51,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 19:36:51,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-01-27 19:36:51,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 324 [2023-01-27 19:36:51,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 563 flow. Second operand has 15 states, 15 states have (on average 114.13333333333334) internal successors, (1712), 15 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:51,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:51,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 324 [2023-01-27 19:36:51,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:51,638 INFO L130 PetriNetUnfolder]: 987/1932 cut-off events. [2023-01-27 19:36:51,638 INFO L131 PetriNetUnfolder]: For 8382/8382 co-relation queries the response was YES. [2023-01-27 19:36:51,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9691 conditions, 1932 events. 987/1932 cut-off events. For 8382/8382 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11836 event pairs, 288 based on Foata normal form. 168/2100 useless extension candidates. Maximal degree in co-relation 9269. Up to 549 conditions per place. [2023-01-27 19:36:51,650 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 164 selfloop transitions, 51 changer transitions 3/218 dead transitions. [2023-01-27 19:36:51,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 218 transitions, 2360 flow [2023-01-27 19:36:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 19:36:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 19:36:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1769 transitions. [2023-01-27 19:36:51,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3639917695473251 [2023-01-27 19:36:51,659 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1769 transitions. [2023-01-27 19:36:51,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1769 transitions. [2023-01-27 19:36:51,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:51,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1769 transitions. [2023-01-27 19:36:51,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 117.93333333333334) internal successors, (1769), 15 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:51,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:51,680 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:51,681 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 563 flow. Second operand 15 states and 1769 transitions. [2023-01-27 19:36:51,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 218 transitions, 2360 flow [2023-01-27 19:36:51,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 218 transitions, 2259 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-01-27 19:36:51,707 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 1088 flow [2023-01-27 19:36:51,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1088, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2023-01-27 19:36:51,708 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-01-27 19:36:51,708 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 1088 flow [2023-01-27 19:36:51,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.13333333333334) internal successors, (1712), 15 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:51,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:51,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:51,715 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 19:36:51,913 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,SelfDestructingSolverStorable17 [2023-01-27 19:36:51,914 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:51,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:51,914 INFO L85 PathProgramCache]: Analyzing trace with hash -128575453, now seen corresponding path program 4 times [2023-01-27 19:36:51,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:51,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843840809] [2023-01-27 19:36:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:51,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:52,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843840809] [2023-01-27 19:36:52,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843840809] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:52,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918264964] [2023-01-27 19:36:52,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:36:52,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:52,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:52,049 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 19:36:52,097 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 19:36:52,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:36:52,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:52,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 19:36:52,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:52,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:36:52,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918264964] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:52,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:52,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-01-27 19:36:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462228041] [2023-01-27 19:36:52,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:52,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:36:52,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:52,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:36:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:36:52,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-27 19:36:52,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 1088 flow. Second operand has 13 states, 13 states have (on average 117.07692307692308) internal successors, (1522), 13 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:52,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:52,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-27 19:36:52,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:52,703 INFO L130 PetriNetUnfolder]: 705/1378 cut-off events. [2023-01-27 19:36:52,703 INFO L131 PetriNetUnfolder]: For 6998/6998 co-relation queries the response was YES. [2023-01-27 19:36:52,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7255 conditions, 1378 events. 705/1378 cut-off events. For 6998/6998 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7663 event pairs, 396 based on Foata normal form. 30/1408 useless extension candidates. Maximal degree in co-relation 6890. Up to 1103 conditions per place. [2023-01-27 19:36:52,724 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 71 selfloop transitions, 3 changer transitions 42/116 dead transitions. [2023-01-27 19:36:52,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 116 transitions, 1432 flow [2023-01-27 19:36:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:36:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:36:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 726 transitions. [2023-01-27 19:36:52,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734567901234568 [2023-01-27 19:36:52,726 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 726 transitions. [2023-01-27 19:36:52,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 726 transitions. [2023-01-27 19:36:52,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:52,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 726 transitions. [2023-01-27 19:36:52,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.0) internal successors, (726), 6 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:52,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:52,730 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:52,730 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 1088 flow. Second operand 6 states and 726 transitions. [2023-01-27 19:36:52,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 116 transitions, 1432 flow [2023-01-27 19:36:52,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 116 transitions, 1393 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-01-27 19:36:52,753 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 746 flow [2023-01-27 19:36:52,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=746, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2023-01-27 19:36:52,754 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-01-27 19:36:52,754 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 746 flow [2023-01-27 19:36:52,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 117.07692307692308) internal successors, (1522), 13 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:52,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:52,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:52,786 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 19:36:52,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:52,970 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:52,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:52,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2055837313, now seen corresponding path program 5 times [2023-01-27 19:36:52,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:52,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737955324] [2023-01-27 19:36:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:52,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 19:36:53,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:53,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737955324] [2023-01-27 19:36:53,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737955324] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:53,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690820134] [2023-01-27 19:36:53,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 19:36:53,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:53,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:53,225 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 19:36:53,254 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 19:36:53,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:36:53,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:53,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-27 19:36:53,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:36:53,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:36:53,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690820134] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:53,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:53,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2023-01-27 19:36:53,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507353201] [2023-01-27 19:36:53,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:53,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 19:36:53,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:53,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 19:36:53,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-01-27 19:36:53,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 324 [2023-01-27 19:36:53,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 746 flow. Second operand has 17 states, 17 states have (on average 108.82352941176471) internal successors, (1850), 17 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:53,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:53,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 324 [2023-01-27 19:36:53,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:54,242 INFO L130 PetriNetUnfolder]: 675/1291 cut-off events. [2023-01-27 19:36:54,243 INFO L131 PetriNetUnfolder]: For 6858/6858 co-relation queries the response was YES. [2023-01-27 19:36:54,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6764 conditions, 1291 events. 675/1291 cut-off events. For 6858/6858 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6996 event pairs, 40 based on Foata normal form. 43/1334 useless extension candidates. Maximal degree in co-relation 6716. Up to 351 conditions per place. [2023-01-27 19:36:54,258 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 128 selfloop transitions, 60 changer transitions 22/210 dead transitions. [2023-01-27 19:36:54,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 210 transitions, 2209 flow [2023-01-27 19:36:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 19:36:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 19:36:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2477 transitions. [2023-01-27 19:36:54,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475028058361392 [2023-01-27 19:36:54,266 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2477 transitions. [2023-01-27 19:36:54,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2477 transitions. [2023-01-27 19:36:54,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:54,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2477 transitions. [2023-01-27 19:36:54,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 112.5909090909091) internal successors, (2477), 22 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:54,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:54,278 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:54,278 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 746 flow. Second operand 22 states and 2477 transitions. [2023-01-27 19:36:54,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 210 transitions, 2209 flow [2023-01-27 19:36:54,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 210 transitions, 2107 flow, removed 48 selfloop flow, removed 8 redundant places. [2023-01-27 19:36:54,294 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 1201 flow [2023-01-27 19:36:54,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1201, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2023-01-27 19:36:54,294 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2023-01-27 19:36:54,294 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 1201 flow [2023-01-27 19:36:54,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 108.82352941176471) internal successors, (1850), 17 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:54,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:54,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:54,302 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 19:36:54,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:54,500 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:54,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:54,501 INFO L85 PathProgramCache]: Analyzing trace with hash -7138628, now seen corresponding path program 6 times [2023-01-27 19:36:54,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:54,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412597502] [2023-01-27 19:36:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:54,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 19:36:54,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:54,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412597502] [2023-01-27 19:36:54,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412597502] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:54,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840161425] [2023-01-27 19:36:54,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 19:36:54,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:54,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:54,631 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 19:36:54,674 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 19:36:54,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 19:36:54,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:36:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 19:36:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 19:36:54,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 19:36:54,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840161425] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:54,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:54,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-01-27 19:36:54,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777952094] [2023-01-27 19:36:54,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:54,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 19:36:54,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 19:36:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-01-27 19:36:54,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2023-01-27 19:36:54,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 1201 flow. Second operand has 15 states, 15 states have (on average 116.73333333333333) internal successors, (1751), 15 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:54,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:54,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2023-01-27 19:36:54,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:55,266 INFO L130 PetriNetUnfolder]: 503/945 cut-off events. [2023-01-27 19:36:55,267 INFO L131 PetriNetUnfolder]: For 6496/6496 co-relation queries the response was YES. [2023-01-27 19:36:55,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 945 events. 503/945 cut-off events. For 6496/6496 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4502 event pairs, 142 based on Foata normal form. 15/960 useless extension candidates. Maximal degree in co-relation 5470. Up to 777 conditions per place. [2023-01-27 19:36:55,291 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 76 selfloop transitions, 13 changer transitions 27/116 dead transitions. [2023-01-27 19:36:55,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 1473 flow [2023-01-27 19:36:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 19:36:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 19:36:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 955 transitions. [2023-01-27 19:36:55,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36844135802469136 [2023-01-27 19:36:55,294 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 955 transitions. [2023-01-27 19:36:55,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 955 transitions. [2023-01-27 19:36:55,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:55,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 955 transitions. [2023-01-27 19:36:55,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 119.375) internal successors, (955), 8 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:55,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:55,298 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 324.0) internal successors, (2916), 9 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:55,298 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 1201 flow. Second operand 8 states and 955 transitions. [2023-01-27 19:36:55,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 1473 flow [2023-01-27 19:36:55,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 116 transitions, 1405 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-01-27 19:36:55,311 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 861 flow [2023-01-27 19:36:55,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2023-01-27 19:36:55,311 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-01-27 19:36:55,311 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 861 flow [2023-01-27 19:36:55,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 116.73333333333333) internal successors, (1751), 15 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:55,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:55,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:55,347 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 19:36:55,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:55,530 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:55,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash 943532550, now seen corresponding path program 7 times [2023-01-27 19:36:55,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:55,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794463421] [2023-01-27 19:36:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:55,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:56,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:56,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794463421] [2023-01-27 19:36:56,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794463421] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:56,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39634127] [2023-01-27 19:36:56,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 19:36:56,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:56,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:56,345 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 19:36:56,413 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 19:36:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:56,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 19:36:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:56,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:57,229 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:36:57,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:36:57,265 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:36:57,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:36:57,282 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:36:57,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:36:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:36:57,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39634127] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:57,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:57,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-01-27 19:36:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713097453] [2023-01-27 19:36:57,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:57,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 19:36:57,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:57,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 19:36:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2023-01-27 19:36:57,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:36:57,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 861 flow. Second operand has 32 states, 32 states have (on average 89.875) internal successors, (2876), 32 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:57,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:57,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:36:57,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:36:58,483 INFO L130 PetriNetUnfolder]: 510/938 cut-off events. [2023-01-27 19:36:58,483 INFO L131 PetriNetUnfolder]: For 6783/6783 co-relation queries the response was YES. [2023-01-27 19:36:58,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 938 events. 510/938 cut-off events. For 6783/6783 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4511 event pairs, 113 based on Foata normal form. 12/950 useless extension candidates. Maximal degree in co-relation 5266. Up to 770 conditions per place. [2023-01-27 19:36:58,494 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 90 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2023-01-27 19:36:58,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 119 transitions, 1352 flow [2023-01-27 19:36:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 19:36:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 19:36:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1206 transitions. [2023-01-27 19:36:58,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2863247863247863 [2023-01-27 19:36:58,496 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1206 transitions. [2023-01-27 19:36:58,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1206 transitions. [2023-01-27 19:36:58,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:36:58,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1206 transitions. [2023-01-27 19:36:58,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 92.76923076923077) internal successors, (1206), 13 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:58,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:58,504 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:58,504 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 861 flow. Second operand 13 states and 1206 transitions. [2023-01-27 19:36:58,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 119 transitions, 1352 flow [2023-01-27 19:36:58,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 1298 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-01-27 19:36:58,518 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 1021 flow [2023-01-27 19:36:58,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1021, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2023-01-27 19:36:58,518 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-01-27 19:36:58,518 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 1021 flow [2023-01-27 19:36:58,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.875) internal successors, (2876), 32 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:58,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:36:58,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:36:58,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 19:36:58,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-27 19:36:58,725 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:36:58,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:36:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2133215393, now seen corresponding path program 1 times [2023-01-27 19:36:58,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:36:58,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584998546] [2023-01-27 19:36:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:58,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:36:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:36:59,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:36:59,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584998546] [2023-01-27 19:36:59,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584998546] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:36:59,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166873143] [2023-01-27 19:36:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:36:59,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:36:59,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:36:59,253 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 19:36:59,257 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 19:36:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:36:59,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 19:36:59,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:36:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:36:59,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:36:59,706 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:36:59,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:36:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:36:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166873143] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:36:59,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:36:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2023-01-27 19:36:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085013234] [2023-01-27 19:36:59,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:36:59,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 19:36:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:36:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 19:36:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-01-27 19:36:59,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-27 19:36:59,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 1021 flow. Second operand has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:36:59,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:36:59,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-27 19:36:59,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:00,224 INFO L130 PetriNetUnfolder]: 517/968 cut-off events. [2023-01-27 19:37:00,224 INFO L131 PetriNetUnfolder]: For 8043/8043 co-relation queries the response was YES. [2023-01-27 19:37:00,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5852 conditions, 968 events. 517/968 cut-off events. For 8043/8043 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4787 event pairs, 119 based on Foata normal form. 8/976 useless extension candidates. Maximal degree in co-relation 5797. Up to 722 conditions per place. [2023-01-27 19:37:00,232 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 101 selfloop transitions, 28 changer transitions 19/148 dead transitions. [2023-01-27 19:37:00,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 148 transitions, 1654 flow [2023-01-27 19:37:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:37:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:37:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1433 transitions. [2023-01-27 19:37:00,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36856995884773663 [2023-01-27 19:37:00,235 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1433 transitions. [2023-01-27 19:37:00,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1433 transitions. [2023-01-27 19:37:00,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:00,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1433 transitions. [2023-01-27 19:37:00,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 119.41666666666667) internal successors, (1433), 12 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 19:37:00,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:00,240 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:00,240 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 1021 flow. Second operand 12 states and 1433 transitions. [2023-01-27 19:37:00,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 148 transitions, 1654 flow [2023-01-27 19:37:00,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 148 transitions, 1577 flow, removed 16 selfloop flow, removed 9 redundant places. [2023-01-27 19:37:00,254 INFO L231 Difference]: Finished difference. Result has 107 places, 98 transitions, 1048 flow [2023-01-27 19:37:00,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1048, PETRI_PLACES=107, PETRI_TRANSITIONS=98} [2023-01-27 19:37:00,255 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 86 predicate places. [2023-01-27 19:37:00,255 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 98 transitions, 1048 flow [2023-01-27 19:37:00,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.63157894736842) internal successors, (2178), 19 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:00,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:00,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:00,263 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 19:37:00,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:00,461 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:00,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:00,462 INFO L85 PathProgramCache]: Analyzing trace with hash -88608933, now seen corresponding path program 2 times [2023-01-27 19:37:00,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:00,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235170392] [2023-01-27 19:37:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:00,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:00,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:00,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235170392] [2023-01-27 19:37:00,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235170392] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:00,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419427595] [2023-01-27 19:37:00,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:37:00,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:00,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:00,945 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 19:37:00,991 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 19:37:01,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:37:01,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:37:01,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 19:37:01,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:01,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:01,460 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:37:01,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:37:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:01,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419427595] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:01,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:01,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2023-01-27 19:37:01,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218276348] [2023-01-27 19:37:01,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:01,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 19:37:01,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:01,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 19:37:01,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-01-27 19:37:01,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-27 19:37:01,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 98 transitions, 1048 flow. Second operand has 20 states, 20 states have (on average 114.4) internal successors, (2288), 20 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:01,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:01,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-27 19:37:01,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:02,307 INFO L130 PetriNetUnfolder]: 539/992 cut-off events. [2023-01-27 19:37:02,307 INFO L131 PetriNetUnfolder]: For 8718/8718 co-relation queries the response was YES. [2023-01-27 19:37:02,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6069 conditions, 992 events. 539/992 cut-off events. For 8718/8718 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4865 event pairs, 109 based on Foata normal form. 12/1004 useless extension candidates. Maximal degree in co-relation 6013. Up to 716 conditions per place. [2023-01-27 19:37:02,315 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 102 selfloop transitions, 43 changer transitions 2/147 dead transitions. [2023-01-27 19:37:02,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1768 flow [2023-01-27 19:37:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 19:37:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 19:37:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1545 transitions. [2023-01-27 19:37:02,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3668091168091168 [2023-01-27 19:37:02,331 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1545 transitions. [2023-01-27 19:37:02,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1545 transitions. [2023-01-27 19:37:02,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:02,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1545 transitions. [2023-01-27 19:37:02,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 118.84615384615384) internal successors, (1545), 13 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:02,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:02,336 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:02,336 INFO L175 Difference]: Start difference. First operand has 107 places, 98 transitions, 1048 flow. Second operand 13 states and 1545 transitions. [2023-01-27 19:37:02,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1768 flow [2023-01-27 19:37:02,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 1705 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-01-27 19:37:02,368 INFO L231 Difference]: Finished difference. Result has 117 places, 110 transitions, 1262 flow [2023-01-27 19:37:02,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1262, PETRI_PLACES=117, PETRI_TRANSITIONS=110} [2023-01-27 19:37:02,370 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2023-01-27 19:37:02,370 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 110 transitions, 1262 flow [2023-01-27 19:37:02,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 114.4) internal successors, (2288), 20 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:02,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:02,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:02,388 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 19:37:02,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:02,576 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:02,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:02,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1583523661, now seen corresponding path program 3 times [2023-01-27 19:37:02,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:02,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604547762] [2023-01-27 19:37:02,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:02,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:03,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:03,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604547762] [2023-01-27 19:37:03,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604547762] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:03,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628980229] [2023-01-27 19:37:03,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:37:03,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:03,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:03,163 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 19:37:03,213 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 19:37:03,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 19:37:03,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:37:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 19:37:03,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:03,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 19:37:03,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:37:03,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:37:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 19:37:03,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:03,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:37:03,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2023-01-27 19:37:04,029 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:37:04,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1804 treesize of output 1564 [2023-01-27 19:37:04,078 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:37:04,079 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:37:04,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:37:04,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 748 treesize of output 572 [2023-01-27 19:37:04,113 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:37:04,115 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:37:04,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:37:04,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 524 treesize of output 460 [2023-01-27 19:37:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 19:37:06,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628980229] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:06,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:06,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2023-01-27 19:37:06,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307095692] [2023-01-27 19:37:06,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:06,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 19:37:06,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:06,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 19:37:06,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=429, Unknown=8, NotChecked=0, Total=552 [2023-01-27 19:37:06,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 324 [2023-01-27 19:37:06,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 110 transitions, 1262 flow. Second operand has 24 states, 24 states have (on average 93.95833333333333) internal successors, (2255), 24 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:06,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:06,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 324 [2023-01-27 19:37:06,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:07,082 INFO L130 PetriNetUnfolder]: 585/1101 cut-off events. [2023-01-27 19:37:07,083 INFO L131 PetriNetUnfolder]: For 11783/11783 co-relation queries the response was YES. [2023-01-27 19:37:07,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7084 conditions, 1101 events. 585/1101 cut-off events. For 11783/11783 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5662 event pairs, 127 based on Foata normal form. 12/1113 useless extension candidates. Maximal degree in co-relation 7023. Up to 832 conditions per place. [2023-01-27 19:37:07,090 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 112 selfloop transitions, 43 changer transitions 23/178 dead transitions. [2023-01-27 19:37:07,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 178 transitions, 2142 flow [2023-01-27 19:37:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 19:37:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 19:37:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1866 transitions. [2023-01-27 19:37:07,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3031189083820663 [2023-01-27 19:37:07,107 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1866 transitions. [2023-01-27 19:37:07,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1866 transitions. [2023-01-27 19:37:07,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:07,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1866 transitions. [2023-01-27 19:37:07,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 98.21052631578948) internal successors, (1866), 19 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:07,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:07,116 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:07,116 INFO L175 Difference]: Start difference. First operand has 117 places, 110 transitions, 1262 flow. Second operand 19 states and 1866 transitions. [2023-01-27 19:37:07,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 178 transitions, 2142 flow [2023-01-27 19:37:07,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 178 transitions, 2048 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-01-27 19:37:07,172 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1412 flow [2023-01-27 19:37:07,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1412, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-01-27 19:37:07,173 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-01-27 19:37:07,173 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1412 flow [2023-01-27 19:37:07,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 93.95833333333333) internal successors, (2255), 24 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:07,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:07,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:07,186 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 19:37:07,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:07,379 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:07,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1313030174, now seen corresponding path program 8 times [2023-01-27 19:37:07,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:07,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665879993] [2023-01-27 19:37:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:07,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:08,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:08,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665879993] [2023-01-27 19:37:08,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665879993] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:08,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677599917] [2023-01-27 19:37:08,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:37:08,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:08,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:08,316 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 19:37:08,346 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 19:37:08,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:37:08,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:37:08,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 19:37:08,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:08,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:09,090 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:37:09,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:37:09,137 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:37:09,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:37:09,181 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:37:09,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:37:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:09,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677599917] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:09,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:09,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-01-27 19:37:09,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009675998] [2023-01-27 19:37:09,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:09,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 19:37:09,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 19:37:09,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 19:37:09,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:37:09,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1412 flow. Second operand has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:09,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:09,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:37:09,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:10,146 INFO L130 PetriNetUnfolder]: 565/1054 cut-off events. [2023-01-27 19:37:10,146 INFO L131 PetriNetUnfolder]: For 11383/11383 co-relation queries the response was YES. [2023-01-27 19:37:10,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6927 conditions, 1054 events. 565/1054 cut-off events. For 11383/11383 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5266 event pairs, 147 based on Foata normal form. 2/1056 useless extension candidates. Maximal degree in co-relation 6857. Up to 973 conditions per place. [2023-01-27 19:37:10,153 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 100 selfloop transitions, 27 changer transitions 2/129 dead transitions. [2023-01-27 19:37:10,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 129 transitions, 1750 flow [2023-01-27 19:37:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 19:37:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 19:37:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1287 transitions. [2023-01-27 19:37:10,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2837301587301587 [2023-01-27 19:37:10,156 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1287 transitions. [2023-01-27 19:37:10,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1287 transitions. [2023-01-27 19:37:10,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:10,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1287 transitions. [2023-01-27 19:37:10,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 91.92857142857143) internal successors, (1287), 14 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:10,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:10,161 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:10,161 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1412 flow. Second operand 14 states and 1287 transitions. [2023-01-27 19:37:10,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 129 transitions, 1750 flow [2023-01-27 19:37:10,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 129 transitions, 1679 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-01-27 19:37:10,188 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1401 flow [2023-01-27 19:37:10,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1401, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-01-27 19:37:10,189 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-01-27 19:37:10,189 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1401 flow [2023-01-27 19:37:10,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:10,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:10,190 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:10,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 19:37:10,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 19:37:10,395 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:10,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:10,395 INFO L85 PathProgramCache]: Analyzing trace with hash 456534228, now seen corresponding path program 9 times [2023-01-27 19:37:10,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:10,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268742999] [2023-01-27 19:37:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:10,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:11,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:11,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268742999] [2023-01-27 19:37:11,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268742999] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:11,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739578221] [2023-01-27 19:37:11,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:37:11,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:11,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:11,204 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:37:11,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 19:37:11,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 19:37:11,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:37:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 19:37:11,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:11,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:12,194 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:37:12,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:37:12,227 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:37:12,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:37:12,234 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:37:12,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:37:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:12,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739578221] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:12,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:12,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2023-01-27 19:37:12,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691239356] [2023-01-27 19:37:12,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:12,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 19:37:12,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 19:37:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-01-27 19:37:12,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:37:12,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1401 flow. Second operand has 28 states, 28 states have (on average 89.60714285714286) internal successors, (2509), 28 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:12,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:12,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:37:12,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:13,511 INFO L130 PetriNetUnfolder]: 588/1099 cut-off events. [2023-01-27 19:37:13,511 INFO L131 PetriNetUnfolder]: For 13894/13894 co-relation queries the response was YES. [2023-01-27 19:37:13,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7380 conditions, 1099 events. 588/1099 cut-off events. For 13894/13894 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5570 event pairs, 139 based on Foata normal form. 24/1123 useless extension candidates. Maximal degree in co-relation 7310. Up to 955 conditions per place. [2023-01-27 19:37:13,519 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 116 selfloop transitions, 37 changer transitions 5/158 dead transitions. [2023-01-27 19:37:13,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 158 transitions, 2061 flow [2023-01-27 19:37:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 19:37:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 19:37:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1577 transitions. [2023-01-27 19:37:13,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2863108206245461 [2023-01-27 19:37:13,522 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1577 transitions. [2023-01-27 19:37:13,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1577 transitions. [2023-01-27 19:37:13,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:13,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1577 transitions. [2023-01-27 19:37:13,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.76470588235294) internal successors, (1577), 17 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:13,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:13,546 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:13,546 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1401 flow. Second operand 17 states and 1577 transitions. [2023-01-27 19:37:13,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 158 transitions, 2061 flow [2023-01-27 19:37:13,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 158 transitions, 1997 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-01-27 19:37:13,589 INFO L231 Difference]: Finished difference. Result has 139 places, 121 transitions, 1509 flow [2023-01-27 19:37:13,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1509, PETRI_PLACES=139, PETRI_TRANSITIONS=121} [2023-01-27 19:37:13,589 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2023-01-27 19:37:13,594 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 121 transitions, 1509 flow [2023-01-27 19:37:13,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 89.60714285714286) internal successors, (2509), 28 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:13,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:13,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:13,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 19:37:13,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 19:37:13,801 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:13,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:13,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1392949847, now seen corresponding path program 4 times [2023-01-27 19:37:13,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:13,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162274620] [2023-01-27 19:37:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:13,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:14,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:14,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162274620] [2023-01-27 19:37:14,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162274620] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:14,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408631051] [2023-01-27 19:37:14,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:37:14,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:14,252 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:37:14,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 19:37:14,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:37:14,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:37:14,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-27 19:37:14,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:14,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:14,706 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:37:14,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:37:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:14,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408631051] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:14,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:14,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 17 [2023-01-27 19:37:14,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760290114] [2023-01-27 19:37:14,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:14,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 19:37:14,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:14,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 19:37:14,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-01-27 19:37:14,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-27 19:37:14,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 121 transitions, 1509 flow. Second operand has 18 states, 18 states have (on average 114.77777777777777) internal successors, (2066), 18 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:14,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:14,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-27 19:37:14,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:15,430 INFO L130 PetriNetUnfolder]: 632/1178 cut-off events. [2023-01-27 19:37:15,430 INFO L131 PetriNetUnfolder]: For 17245/17245 co-relation queries the response was YES. [2023-01-27 19:37:15,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8310 conditions, 1178 events. 632/1178 cut-off events. For 17245/17245 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6085 event pairs, 94 based on Foata normal form. 8/1186 useless extension candidates. Maximal degree in co-relation 8239. Up to 704 conditions per place. [2023-01-27 19:37:15,453 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 125 selfloop transitions, 52 changer transitions 3/180 dead transitions. [2023-01-27 19:37:15,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 180 transitions, 2468 flow [2023-01-27 19:37:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 19:37:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 19:37:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1671 transitions. [2023-01-27 19:37:15,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683862433862434 [2023-01-27 19:37:15,460 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1671 transitions. [2023-01-27 19:37:15,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1671 transitions. [2023-01-27 19:37:15,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:15,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1671 transitions. [2023-01-27 19:37:15,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 119.35714285714286) internal successors, (1671), 14 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:15,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:15,469 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 324.0) internal successors, (4860), 15 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:15,483 INFO L175 Difference]: Start difference. First operand has 139 places, 121 transitions, 1509 flow. Second operand 14 states and 1671 transitions. [2023-01-27 19:37:15,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 180 transitions, 2468 flow [2023-01-27 19:37:15,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 180 transitions, 2372 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-01-27 19:37:15,537 INFO L231 Difference]: Finished difference. Result has 143 places, 126 transitions, 1612 flow [2023-01-27 19:37:15,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1612, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2023-01-27 19:37:15,547 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-01-27 19:37:15,547 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 1612 flow [2023-01-27 19:37:15,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.77777777777777) internal successors, (2066), 18 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:15,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:15,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:15,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 19:37:15,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 19:37:15,757 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:15,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:15,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1043539718, now seen corresponding path program 10 times [2023-01-27 19:37:15,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:15,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406188201] [2023-01-27 19:37:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:15,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:16,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:16,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406188201] [2023-01-27 19:37:16,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406188201] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:16,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847864547] [2023-01-27 19:37:16,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:37:16,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:16,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:16,549 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:37:16,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 19:37:16,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:37:16,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:37:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 19:37:16,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:16,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:17,068 INFO L321 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-01-27 19:37:17,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2023-01-27 19:37:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:17,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847864547] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:17,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:17,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-01-27 19:37:17,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093945163] [2023-01-27 19:37:17,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:17,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 19:37:17,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 19:37:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-01-27 19:37:17,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:37:17,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 126 transitions, 1612 flow. Second operand has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:17,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:17,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:37:17,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:18,141 INFO L130 PetriNetUnfolder]: 641/1206 cut-off events. [2023-01-27 19:37:18,141 INFO L131 PetriNetUnfolder]: For 18735/18735 co-relation queries the response was YES. [2023-01-27 19:37:18,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8653 conditions, 1206 events. 641/1206 cut-off events. For 18735/18735 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6332 event pairs, 114 based on Foata normal form. 4/1210 useless extension candidates. Maximal degree in co-relation 8579. Up to 769 conditions per place. [2023-01-27 19:37:18,180 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 121 selfloop transitions, 52 changer transitions 16/189 dead transitions. [2023-01-27 19:37:18,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 189 transitions, 2534 flow [2023-01-27 19:37:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 19:37:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 19:37:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1686 transitions. [2023-01-27 19:37:18,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2890946502057613 [2023-01-27 19:37:18,186 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1686 transitions. [2023-01-27 19:37:18,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1686 transitions. [2023-01-27 19:37:18,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:18,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1686 transitions. [2023-01-27 19:37:18,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 93.66666666666667) internal successors, (1686), 18 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:18,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:18,196 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:18,196 INFO L175 Difference]: Start difference. First operand has 143 places, 126 transitions, 1612 flow. Second operand 18 states and 1686 transitions. [2023-01-27 19:37:18,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 189 transitions, 2534 flow [2023-01-27 19:37:18,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 189 transitions, 2447 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-01-27 19:37:18,266 INFO L231 Difference]: Finished difference. Result has 158 places, 134 transitions, 1805 flow [2023-01-27 19:37:18,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1805, PETRI_PLACES=158, PETRI_TRANSITIONS=134} [2023-01-27 19:37:18,280 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-01-27 19:37:18,281 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 134 transitions, 1805 flow [2023-01-27 19:37:18,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:18,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:18,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:18,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 19:37:18,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:18,487 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:18,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2045874430, now seen corresponding path program 11 times [2023-01-27 19:37:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:18,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614656032] [2023-01-27 19:37:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:19,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:19,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614656032] [2023-01-27 19:37:19,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614656032] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:19,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729094271] [2023-01-27 19:37:19,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 19:37:19,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:19,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:19,217 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:37:19,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 19:37:19,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 19:37:19,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:37:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 19:37:19,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:19,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:19,865 INFO L321 Elim1Store]: treesize reduction 35, result has 80.9 percent of original size [2023-01-27 19:37:19,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 173 [2023-01-27 19:37:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:37:20,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729094271] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:20,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:20,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-01-27 19:37:20,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866095492] [2023-01-27 19:37:20,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:20,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 19:37:20,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:20,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 19:37:20,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-01-27 19:37:20,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:37:20,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 134 transitions, 1805 flow. Second operand has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:20,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:20,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:37:20,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:21,295 INFO L130 PetriNetUnfolder]: 637/1193 cut-off events. [2023-01-27 19:37:21,299 INFO L131 PetriNetUnfolder]: For 21843/21843 co-relation queries the response was YES. [2023-01-27 19:37:21,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9097 conditions, 1193 events. 637/1193 cut-off events. For 21843/21843 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6229 event pairs, 152 based on Foata normal form. 4/1197 useless extension candidates. Maximal degree in co-relation 9015. Up to 914 conditions per place. [2023-01-27 19:37:21,331 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 109 selfloop transitions, 50 changer transitions 7/166 dead transitions. [2023-01-27 19:37:21,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 166 transitions, 2387 flow [2023-01-27 19:37:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 19:37:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 19:37:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1582 transitions. [2023-01-27 19:37:21,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28721859114015974 [2023-01-27 19:37:21,334 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1582 transitions. [2023-01-27 19:37:21,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1582 transitions. [2023-01-27 19:37:21,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:21,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1582 transitions. [2023-01-27 19:37:21,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 93.05882352941177) internal successors, (1582), 17 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:21,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:21,360 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:21,360 INFO L175 Difference]: Start difference. First operand has 158 places, 134 transitions, 1805 flow. Second operand 17 states and 1582 transitions. [2023-01-27 19:37:21,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 166 transitions, 2387 flow [2023-01-27 19:37:21,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 2253 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-01-27 19:37:21,445 INFO L231 Difference]: Finished difference. Result has 166 places, 136 transitions, 1843 flow [2023-01-27 19:37:21,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1843, PETRI_PLACES=166, PETRI_TRANSITIONS=136} [2023-01-27 19:37:21,446 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-01-27 19:37:21,446 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 136 transitions, 1843 flow [2023-01-27 19:37:21,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:21,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:21,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:21,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 19:37:21,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:21,653 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:21,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash -962381630, now seen corresponding path program 12 times [2023-01-27 19:37:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:21,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134636540] [2023-01-27 19:37:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:21,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:22,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:22,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134636540] [2023-01-27 19:37:22,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134636540] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:22,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091049717] [2023-01-27 19:37:22,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 19:37:22,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:22,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:22,141 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:37:22,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 19:37:22,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 19:37:22,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:37:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 19:37:22,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:22,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:22,950 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-01-27 19:37:22,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-01-27 19:37:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:37:29,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091049717] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:29,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:29,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-01-27 19:37:29,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310627703] [2023-01-27 19:37:29,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:29,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 19:37:29,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:29,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 19:37:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-01-27 19:37:29,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:37:29,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 136 transitions, 1843 flow. Second operand has 24 states, 24 states have (on average 90.25) internal successors, (2166), 24 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:29,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:29,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:37:29,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:30,329 INFO L130 PetriNetUnfolder]: 681/1281 cut-off events. [2023-01-27 19:37:30,329 INFO L131 PetriNetUnfolder]: For 26071/26071 co-relation queries the response was YES. [2023-01-27 19:37:30,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9743 conditions, 1281 events. 681/1281 cut-off events. For 26071/26071 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6833 event pairs, 133 based on Foata normal form. 48/1329 useless extension candidates. Maximal degree in co-relation 9658. Up to 906 conditions per place. [2023-01-27 19:37:30,356 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 129 selfloop transitions, 66 changer transitions 12/207 dead transitions. [2023-01-27 19:37:30,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 207 transitions, 2873 flow [2023-01-27 19:37:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 19:37:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 19:37:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2068 transitions. [2023-01-27 19:37:30,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29012345679012347 [2023-01-27 19:37:30,359 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2068 transitions. [2023-01-27 19:37:30,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2068 transitions. [2023-01-27 19:37:30,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:30,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2068 transitions. [2023-01-27 19:37:30,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 94.0) internal successors, (2068), 22 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:30,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:30,379 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:30,379 INFO L175 Difference]: Start difference. First operand has 166 places, 136 transitions, 1843 flow. Second operand 22 states and 2068 transitions. [2023-01-27 19:37:30,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 207 transitions, 2873 flow [2023-01-27 19:37:30,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 207 transitions, 2769 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-01-27 19:37:30,473 INFO L231 Difference]: Finished difference. Result has 176 places, 144 transitions, 2063 flow [2023-01-27 19:37:30,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2063, PETRI_PLACES=176, PETRI_TRANSITIONS=144} [2023-01-27 19:37:30,473 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-01-27 19:37:30,473 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 144 transitions, 2063 flow [2023-01-27 19:37:30,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.25) internal successors, (2166), 24 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:30,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:30,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:30,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 19:37:30,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-01-27 19:37:30,680 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:30,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1900475021, now seen corresponding path program 5 times [2023-01-27 19:37:30,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:30,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240382951] [2023-01-27 19:37:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:30,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:31,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:31,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240382951] [2023-01-27 19:37:31,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240382951] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:31,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128761543] [2023-01-27 19:37:31,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 19:37:31,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:31,203 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:37:31,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 19:37:31,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 19:37:31,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:37:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 19:37:31,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:31,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:31,504 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:37:31,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:37:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:31,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128761543] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:31,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:31,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 15 [2023-01-27 19:37:31,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020820032] [2023-01-27 19:37:31,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:31,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 19:37:31,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:31,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 19:37:31,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-01-27 19:37:31,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2023-01-27 19:37:31,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 144 transitions, 2063 flow. Second operand has 16 states, 16 states have (on average 114.4375) internal successors, (1831), 16 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:31,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:31,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2023-01-27 19:37:31,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:32,210 INFO L130 PetriNetUnfolder]: 775/1447 cut-off events. [2023-01-27 19:37:32,210 INFO L131 PetriNetUnfolder]: For 36374/36374 co-relation queries the response was YES. [2023-01-27 19:37:32,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 1447 events. 775/1447 cut-off events. For 36374/36374 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7900 event pairs, 106 based on Foata normal form. 32/1479 useless extension candidates. Maximal degree in co-relation 11722. Up to 922 conditions per place. [2023-01-27 19:37:32,244 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 177 selfloop transitions, 49 changer transitions 1/227 dead transitions. [2023-01-27 19:37:32,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 3627 flow [2023-01-27 19:37:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 19:37:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 19:37:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2012 transitions. [2023-01-27 19:37:32,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36528685548293394 [2023-01-27 19:37:32,248 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2012 transitions. [2023-01-27 19:37:32,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2012 transitions. [2023-01-27 19:37:32,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:32,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2012 transitions. [2023-01-27 19:37:32,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 118.3529411764706) internal successors, (2012), 17 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:32,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:32,254 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:32,254 INFO L175 Difference]: Start difference. First operand has 176 places, 144 transitions, 2063 flow. Second operand 17 states and 2012 transitions. [2023-01-27 19:37:32,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 3627 flow [2023-01-27 19:37:32,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 227 transitions, 3485 flow, removed 30 selfloop flow, removed 15 redundant places. [2023-01-27 19:37:32,399 INFO L231 Difference]: Finished difference. Result has 183 places, 163 transitions, 2288 flow [2023-01-27 19:37:32,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2288, PETRI_PLACES=183, PETRI_TRANSITIONS=163} [2023-01-27 19:37:32,400 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2023-01-27 19:37:32,400 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 163 transitions, 2288 flow [2023-01-27 19:37:32,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 114.4375) internal successors, (1831), 16 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:32,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:32,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:32,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 19:37:32,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-27 19:37:32,601 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:32,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:32,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1115989726, now seen corresponding path program 13 times [2023-01-27 19:37:32,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:32,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123794083] [2023-01-27 19:37:32,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:32,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:33,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123794083] [2023-01-27 19:37:33,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123794083] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:33,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086720467] [2023-01-27 19:37:33,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 19:37:33,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:33,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:33,302 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:37:33,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 19:37:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:33,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 19:37:33,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:33,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:33,847 INFO L321 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2023-01-27 19:37:33,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 86 [2023-01-27 19:37:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:37:34,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086720467] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:34,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:34,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-01-27 19:37:34,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920502957] [2023-01-27 19:37:34,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:34,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 19:37:34,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:34,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 19:37:34,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2023-01-27 19:37:34,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:37:34,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 163 transitions, 2288 flow. Second operand has 32 states, 32 states have (on average 89.75) internal successors, (2872), 32 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:34,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:34,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:37:34,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:34,869 INFO L130 PetriNetUnfolder]: 776/1457 cut-off events. [2023-01-27 19:37:34,869 INFO L131 PetriNetUnfolder]: For 36803/36803 co-relation queries the response was YES. [2023-01-27 19:37:34,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12087 conditions, 1457 events. 776/1457 cut-off events. For 36803/36803 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8031 event pairs, 190 based on Foata normal form. 2/1459 useless extension candidates. Maximal degree in co-relation 11993. Up to 1391 conditions per place. [2023-01-27 19:37:34,903 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 147 selfloop transitions, 19 changer transitions 13/179 dead transitions. [2023-01-27 19:37:34,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 179 transitions, 2814 flow [2023-01-27 19:37:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 19:37:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 19:37:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1189 transitions. [2023-01-27 19:37:34,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2822886989553656 [2023-01-27 19:37:34,905 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1189 transitions. [2023-01-27 19:37:34,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1189 transitions. [2023-01-27 19:37:34,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:37:34,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1189 transitions. [2023-01-27 19:37:34,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 91.46153846153847) internal successors, (1189), 13 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:34,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:34,913 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:34,913 INFO L175 Difference]: Start difference. First operand has 183 places, 163 transitions, 2288 flow. Second operand 13 states and 1189 transitions. [2023-01-27 19:37:34,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 179 transitions, 2814 flow [2023-01-27 19:37:35,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 179 transitions, 2655 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-01-27 19:37:35,073 INFO L231 Difference]: Finished difference. Result has 188 places, 163 transitions, 2201 flow [2023-01-27 19:37:35,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2201, PETRI_PLACES=188, PETRI_TRANSITIONS=163} [2023-01-27 19:37:35,074 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2023-01-27 19:37:35,074 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 163 transitions, 2201 flow [2023-01-27 19:37:35,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.75) internal successors, (2872), 32 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:35,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:37:35,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:37:35,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-27 19:37:35,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:35,281 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:37:35,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:37:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash 966105765, now seen corresponding path program 6 times [2023-01-27 19:37:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:37:35,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938214081] [2023-01-27 19:37:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:37:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:37:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:37:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:37:35,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:37:35,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938214081] [2023-01-27 19:37:35,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938214081] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:37:35,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481814588] [2023-01-27 19:37:35,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 19:37:35,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:37:35,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:37:35,781 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:37:35,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 19:37:35,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 19:37:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:37:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-27 19:37:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:37:35,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:37:35,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:37:35,965 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-01-27 19:37:35,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-01-27 19:37:36,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-01-27 19:37:36,129 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:37:36,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:37:36,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:37:36,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:37:36,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:37:36,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:37:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:37:36,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:37:37,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:37:37,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 90 [2023-01-27 19:37:37,320 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:37:37,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110572 treesize of output 101920 [2023-01-27 19:37:37,930 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:37:37,933 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:37:37,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:37:37,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 3164 treesize of output 3006 [2023-01-27 19:37:38,019 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:37:38,021 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:37:38,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:37:38,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2956 treesize of output 2590 [2023-01-27 19:37:38,112 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:37:38,114 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:37:38,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:37:38,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2540 treesize of output 1758 [2023-01-27 19:37:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:37:45,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481814588] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:37:45,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:37:45,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2023-01-27 19:37:45,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218373158] [2023-01-27 19:37:45,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:37:45,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 19:37:45,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:37:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 19:37:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=757, Unknown=20, NotChecked=0, Total=930 [2023-01-27 19:37:45,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 324 [2023-01-27 19:37:45,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 163 transitions, 2201 flow. Second operand has 31 states, 31 states have (on average 82.74193548387096) internal successors, (2565), 31 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:37:45,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:37:45,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 324 [2023-01-27 19:37:45,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:37:50,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 19:37:53,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 19:37:54,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 19:37:55,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 19:37:59,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 19:38:00,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 19:38:00,810 INFO L130 PetriNetUnfolder]: 1102/2131 cut-off events. [2023-01-27 19:38:00,810 INFO L131 PetriNetUnfolder]: For 67112/67112 co-relation queries the response was YES. [2023-01-27 19:38:00,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18044 conditions, 2131 events. 1102/2131 cut-off events. For 67112/67112 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12802 event pairs, 182 based on Foata normal form. 98/2229 useless extension candidates. Maximal degree in co-relation 17467. Up to 1347 conditions per place. [2023-01-27 19:38:00,841 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 278 selfloop transitions, 76 changer transitions 13/367 dead transitions. [2023-01-27 19:38:00,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 367 transitions, 5441 flow [2023-01-27 19:38:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 19:38:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 19:38:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3229 transitions. [2023-01-27 19:38:00,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2693526860193527 [2023-01-27 19:38:00,847 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3229 transitions. [2023-01-27 19:38:00,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3229 transitions. [2023-01-27 19:38:00,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:38:00,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3229 transitions. [2023-01-27 19:38:00,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 87.27027027027027) internal successors, (3229), 37 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:00,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 324.0) internal successors, (12312), 38 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:00,877 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 324.0) internal successors, (12312), 38 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:00,878 INFO L175 Difference]: Start difference. First operand has 188 places, 163 transitions, 2201 flow. Second operand 37 states and 3229 transitions. [2023-01-27 19:38:00,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 367 transitions, 5441 flow [2023-01-27 19:38:01,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 367 transitions, 5329 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-01-27 19:38:01,069 INFO L231 Difference]: Finished difference. Result has 228 places, 220 transitions, 3320 flow [2023-01-27 19:38:01,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3320, PETRI_PLACES=228, PETRI_TRANSITIONS=220} [2023-01-27 19:38:01,075 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2023-01-27 19:38:01,076 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 220 transitions, 3320 flow [2023-01-27 19:38:01,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 82.74193548387096) internal successors, (2565), 31 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:01,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:38:01,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:38:01,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-27 19:38:01,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:38:01,281 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:38:01,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:38:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1637860844, now seen corresponding path program 14 times [2023-01-27 19:38:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:38:01,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715108762] [2023-01-27 19:38:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:38:01,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:38:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:38:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:38:01,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:38:01,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715108762] [2023-01-27 19:38:01,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715108762] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:38:01,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216961408] [2023-01-27 19:38:01,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:38:01,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:38:01,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:38:01,946 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:38:01,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 19:38:02,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:38:02,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:38:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 19:38:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:38:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:38:02,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:38:02,531 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 19:38:02,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 80 [2023-01-27 19:38:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:38:02,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216961408] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:38:02,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:38:02,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-01-27 19:38:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82254633] [2023-01-27 19:38:02,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:38:02,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 19:38:02,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:38:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 19:38:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 19:38:02,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:38:02,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 220 transitions, 3320 flow. Second operand has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:02,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:38:02,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:38:02,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:38:03,878 INFO L130 PetriNetUnfolder]: 1088/2103 cut-off events. [2023-01-27 19:38:03,879 INFO L131 PetriNetUnfolder]: For 70834/70834 co-relation queries the response was YES. [2023-01-27 19:38:03,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18808 conditions, 2103 events. 1088/2103 cut-off events. For 70834/70834 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12596 event pairs, 340 based on Foata normal form. 4/2107 useless extension candidates. Maximal degree in co-relation 18325. Up to 1995 conditions per place. [2023-01-27 19:38:03,898 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 187 selfloop transitions, 41 changer transitions 3/231 dead transitions. [2023-01-27 19:38:03,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 231 transitions, 3895 flow [2023-01-27 19:38:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 19:38:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 19:38:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1187 transitions. [2023-01-27 19:38:03,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2818138651471985 [2023-01-27 19:38:03,913 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1187 transitions. [2023-01-27 19:38:03,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1187 transitions. [2023-01-27 19:38:03,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:38:03,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1187 transitions. [2023-01-27 19:38:03,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 91.3076923076923) internal successors, (1187), 13 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:03,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:03,918 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:03,918 INFO L175 Difference]: Start difference. First operand has 228 places, 220 transitions, 3320 flow. Second operand 13 states and 1187 transitions. [2023-01-27 19:38:03,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 231 transitions, 3895 flow [2023-01-27 19:38:04,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 231 transitions, 3515 flow, removed 163 selfloop flow, removed 6 redundant places. [2023-01-27 19:38:04,108 INFO L231 Difference]: Finished difference. Result has 234 places, 223 transitions, 3118 flow [2023-01-27 19:38:04,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3118, PETRI_PLACES=234, PETRI_TRANSITIONS=223} [2023-01-27 19:38:04,109 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-01-27 19:38:04,109 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 223 transitions, 3118 flow [2023-01-27 19:38:04,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.6969696969697) internal successors, (2960), 33 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:04,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:38:04,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:38:04,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-27 19:38:04,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:38:04,317 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:38:04,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:38:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1833946803, now seen corresponding path program 7 times [2023-01-27 19:38:04,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:38:04,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463518988] [2023-01-27 19:38:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:38:04,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:38:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:38:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:38:04,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:38:04,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463518988] [2023-01-27 19:38:04,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463518988] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:38:04,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068847140] [2023-01-27 19:38:04,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 19:38:04,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:38:04,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:38:04,827 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:38:04,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-27 19:38:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:38:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 19:38:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:38:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:38:05,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:38:05,276 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:38:05,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:38:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:38:05,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068847140] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:38:05,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:38:05,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 5] total 20 [2023-01-27 19:38:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915946955] [2023-01-27 19:38:05,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:38:05,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 19:38:05,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:38:05,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 19:38:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-01-27 19:38:05,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-27 19:38:05,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 223 transitions, 3118 flow. Second operand has 21 states, 21 states have (on average 104.47619047619048) internal successors, (2194), 21 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:05,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:38:05,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-27 19:38:05,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:38:06,248 INFO L130 PetriNetUnfolder]: 1144/2211 cut-off events. [2023-01-27 19:38:06,248 INFO L131 PetriNetUnfolder]: For 76116/76116 co-relation queries the response was YES. [2023-01-27 19:38:06,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18927 conditions, 2211 events. 1144/2211 cut-off events. For 76116/76116 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13329 event pairs, 284 based on Foata normal form. 28/2239 useless extension candidates. Maximal degree in co-relation 18813. Up to 1663 conditions per place. [2023-01-27 19:38:06,270 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 196 selfloop transitions, 91 changer transitions 7/294 dead transitions. [2023-01-27 19:38:06,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 294 transitions, 4721 flow [2023-01-27 19:38:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 19:38:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 19:38:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2153 transitions. [2023-01-27 19:38:06,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322530864197531 [2023-01-27 19:38:06,301 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2153 transitions. [2023-01-27 19:38:06,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2153 transitions. [2023-01-27 19:38:06,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:38:06,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2153 transitions. [2023-01-27 19:38:06,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 107.65) internal successors, (2153), 20 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:06,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:06,308 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:06,308 INFO L175 Difference]: Start difference. First operand has 234 places, 223 transitions, 3118 flow. Second operand 20 states and 2153 transitions. [2023-01-27 19:38:06,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 294 transitions, 4721 flow [2023-01-27 19:38:06,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 294 transitions, 4561 flow, removed 45 selfloop flow, removed 10 redundant places. [2023-01-27 19:38:06,536 INFO L231 Difference]: Finished difference. Result has 242 places, 244 transitions, 3565 flow [2023-01-27 19:38:06,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3565, PETRI_PLACES=242, PETRI_TRANSITIONS=244} [2023-01-27 19:38:06,537 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 221 predicate places. [2023-01-27 19:38:06,538 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 244 transitions, 3565 flow [2023-01-27 19:38:06,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 104.47619047619048) internal successors, (2194), 21 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:06,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:38:06,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:38:06,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-27 19:38:06,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-27 19:38:06,744 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:38:06,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:38:06,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1288803642, now seen corresponding path program 15 times [2023-01-27 19:38:06,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:38:06,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151787738] [2023-01-27 19:38:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:38:06,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:38:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:38:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:38:07,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:38:07,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151787738] [2023-01-27 19:38:07,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151787738] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:38:07,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101045070] [2023-01-27 19:38:07,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:38:07,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:38:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:38:07,453 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:38:07,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-27 19:38:07,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 19:38:07,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:38:07,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 19:38:07,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:38:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:38:08,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:38:08,292 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:38:08,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:38:08,310 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:38:08,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:38:08,317 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:38:08,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:38:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:38:08,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101045070] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:38:08,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:38:08,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-01-27 19:38:08,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298405702] [2023-01-27 19:38:08,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:38:08,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 19:38:08,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:38:08,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 19:38:08,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-01-27 19:38:08,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:38:08,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 244 transitions, 3565 flow. Second operand has 31 states, 31 states have (on average 89.58064516129032) internal successors, (2777), 31 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:08,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:38:08,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:38:08,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:38:09,540 INFO L130 PetriNetUnfolder]: 1128/2187 cut-off events. [2023-01-27 19:38:09,540 INFO L131 PetriNetUnfolder]: For 73206/73206 co-relation queries the response was YES. [2023-01-27 19:38:09,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18852 conditions, 2187 events. 1128/2187 cut-off events. For 73206/73206 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13155 event pairs, 314 based on Foata normal form. 24/2211 useless extension candidates. Maximal degree in co-relation 18738. Up to 1945 conditions per place. [2023-01-27 19:38:09,560 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 209 selfloop transitions, 59 changer transitions 1/269 dead transitions. [2023-01-27 19:38:09,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 269 transitions, 4364 flow [2023-01-27 19:38:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 19:38:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 19:38:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1386 transitions. [2023-01-27 19:38:09,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2851851851851852 [2023-01-27 19:38:09,562 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1386 transitions. [2023-01-27 19:38:09,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1386 transitions. [2023-01-27 19:38:09,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:38:09,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1386 transitions. [2023-01-27 19:38:09,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 92.4) internal successors, (1386), 15 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:09,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:09,583 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:09,583 INFO L175 Difference]: Start difference. First operand has 242 places, 244 transitions, 3565 flow. Second operand 15 states and 1386 transitions. [2023-01-27 19:38:09,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 269 transitions, 4364 flow [2023-01-27 19:38:09,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 269 transitions, 4092 flow, removed 82 selfloop flow, removed 12 redundant places. [2023-01-27 19:38:09,803 INFO L231 Difference]: Finished difference. Result has 245 places, 245 transitions, 3471 flow [2023-01-27 19:38:09,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3471, PETRI_PLACES=245, PETRI_TRANSITIONS=245} [2023-01-27 19:38:09,804 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2023-01-27 19:38:09,804 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 245 transitions, 3471 flow [2023-01-27 19:38:09,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 89.58064516129032) internal successors, (2777), 31 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:09,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:38:09,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:38:09,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-27 19:38:10,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-27 19:38:10,013 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:38:10,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:38:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash -432307696, now seen corresponding path program 16 times [2023-01-27 19:38:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:38:10,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32725436] [2023-01-27 19:38:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:38:10,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:38:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:38:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:38:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:38:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32725436] [2023-01-27 19:38:10,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32725436] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:38:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330907366] [2023-01-27 19:38:10,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:38:10,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:38:10,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:38:10,725 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:38:10,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-27 19:38:10,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:38:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:38:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 19:38:10,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:38:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:38:11,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:38:11,369 INFO L321 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-01-27 19:38:11,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 220 [2023-01-27 19:38:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:38:13,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330907366] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:38:13,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:38:13,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 5] total 23 [2023-01-27 19:38:13,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231726253] [2023-01-27 19:38:13,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:38:13,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 19:38:13,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:38:13,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 19:38:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-01-27 19:38:13,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:38:13,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 245 transitions, 3471 flow. Second operand has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:13,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:38:13,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:38:13,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:38:14,045 INFO L130 PetriNetUnfolder]: 1114/2153 cut-off events. [2023-01-27 19:38:14,046 INFO L131 PetriNetUnfolder]: For 67133/67133 co-relation queries the response was YES. [2023-01-27 19:38:14,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 2153 events. 1114/2153 cut-off events. For 67133/67133 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12885 event pairs, 262 based on Foata normal form. 16/2169 useless extension candidates. Maximal degree in co-relation 18390. Up to 1693 conditions per place. [2023-01-27 19:38:14,065 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 174 selfloop transitions, 87 changer transitions 8/269 dead transitions. [2023-01-27 19:38:14,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 269 transitions, 4196 flow [2023-01-27 19:38:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 19:38:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 19:38:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1658 transitions. [2023-01-27 19:38:14,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2842935528120713 [2023-01-27 19:38:14,067 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1658 transitions. [2023-01-27 19:38:14,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1658 transitions. [2023-01-27 19:38:14,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:38:14,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1658 transitions. [2023-01-27 19:38:14,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.11111111111111) internal successors, (1658), 18 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:14,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:14,098 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:14,099 INFO L175 Difference]: Start difference. First operand has 245 places, 245 transitions, 3471 flow. Second operand 18 states and 1658 transitions. [2023-01-27 19:38:14,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 269 transitions, 4196 flow [2023-01-27 19:38:14,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 269 transitions, 4062 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-01-27 19:38:14,266 INFO L231 Difference]: Finished difference. Result has 250 places, 242 transitions, 3489 flow [2023-01-27 19:38:14,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3489, PETRI_PLACES=250, PETRI_TRANSITIONS=242} [2023-01-27 19:38:14,267 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 229 predicate places. [2023-01-27 19:38:14,267 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 242 transitions, 3489 flow [2023-01-27 19:38:14,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:38:14,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:38:14,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:38:14,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-27 19:38:14,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-27 19:38:14,473 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:38:14,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:38:14,473 INFO L85 PathProgramCache]: Analyzing trace with hash 559278698, now seen corresponding path program 17 times [2023-01-27 19:38:14,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:38:14,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478105628] [2023-01-27 19:38:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:38:14,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:38:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:38:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:38:15,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:38:15,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478105628] [2023-01-27 19:38:15,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478105628] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:38:15,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56698367] [2023-01-27 19:38:15,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 19:38:15,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:38:15,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:38:15,517 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:38:15,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-27 19:38:15,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 19:38:15,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:38:15,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-27 19:38:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:38:16,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 19:38:16,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:38:16,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:38:16,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:38:16,532 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 19:38:16,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2023-01-27 19:38:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:38:16,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:38:17,141 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:38:17,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-01-27 19:38:17,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:38:17,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 86 [2023-01-27 19:38:17,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:38:17,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 55 [2023-01-27 19:38:17,212 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:38:17,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 90 [2023-01-27 19:38:17,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:38:17,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3140 treesize of output 2996 [2023-01-27 19:38:17,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:38:17,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1560 treesize of output 1288 [2023-01-27 19:39:49,641 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:39:49,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72617 treesize of output 48356 [2023-01-27 19:40:34,510 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 19:40:34,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44635 treesize of output 37498 [2023-01-27 19:40:50,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:40:50,442 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:40:50,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58647 treesize of output 43215 [2023-01-27 19:40:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 19:40:55,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56698367] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:40:55,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:40:55,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 32 [2023-01-27 19:40:55,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151072151] [2023-01-27 19:40:55,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:40:55,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 19:40:55,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:40:55,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 19:40:55,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=937, Unknown=5, NotChecked=0, Total=1056 [2023-01-27 19:40:55,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-01-27 19:40:55,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 242 transitions, 3489 flow. Second operand has 33 states, 33 states have (on average 81.66666666666667) internal successors, (2695), 33 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:40:55,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:40:55,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-01-27 19:40:55,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:40:57,307 INFO L130 PetriNetUnfolder]: 1277/2424 cut-off events. [2023-01-27 19:40:57,307 INFO L131 PetriNetUnfolder]: For 83343/83343 co-relation queries the response was YES. [2023-01-27 19:40:57,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21208 conditions, 2424 events. 1277/2424 cut-off events. For 83343/83343 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14641 event pairs, 247 based on Foata normal form. 28/2452 useless extension candidates. Maximal degree in co-relation 21096. Up to 1717 conditions per place. [2023-01-27 19:40:57,330 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 256 selfloop transitions, 76 changer transitions 1/333 dead transitions. [2023-01-27 19:40:57,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 333 transitions, 5250 flow [2023-01-27 19:40:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 19:40:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 19:40:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1729 transitions. [2023-01-27 19:40:57,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.266820987654321 [2023-01-27 19:40:57,332 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1729 transitions. [2023-01-27 19:40:57,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1729 transitions. [2023-01-27 19:40:57,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:40:57,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1729 transitions. [2023-01-27 19:40:57,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.45) internal successors, (1729), 20 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:40:57,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:40:57,343 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:40:57,344 INFO L175 Difference]: Start difference. First operand has 250 places, 242 transitions, 3489 flow. Second operand 20 states and 1729 transitions. [2023-01-27 19:40:57,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 333 transitions, 5250 flow [2023-01-27 19:40:57,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 333 transitions, 5044 flow, removed 10 selfloop flow, removed 17 redundant places. [2023-01-27 19:40:57,501 INFO L231 Difference]: Finished difference. Result has 256 places, 262 transitions, 3863 flow [2023-01-27 19:40:57,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3863, PETRI_PLACES=256, PETRI_TRANSITIONS=262} [2023-01-27 19:40:57,503 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2023-01-27 19:40:57,503 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 262 transitions, 3863 flow [2023-01-27 19:40:57,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 81.66666666666667) internal successors, (2695), 33 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:40:57,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:40:57,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:40:57,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-27 19:40:57,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-27 19:40:57,709 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:40:57,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:40:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1611664731, now seen corresponding path program 8 times [2023-01-27 19:40:57,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:40:57,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676099973] [2023-01-27 19:40:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:40:57,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:40:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:40:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:40:58,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:40:58,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676099973] [2023-01-27 19:40:58,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676099973] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:40:58,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559861205] [2023-01-27 19:40:58,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:40:58,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:40:58,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:40:58,241 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:40:58,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-27 19:40:58,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:40:58,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:40:58,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 19:40:58,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:40:58,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:40:58,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 19:40:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:40:58,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:40:58,675 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1579 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1579))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select .cse2 (+ .cse1 ~B~0.offset 4))))) (= (select .cse2 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|))))) is different from false [2023-01-27 19:40:58,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:40:58,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 178 [2023-01-27 19:40:58,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:40:58,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 89 [2023-01-27 19:40:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:40:59,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559861205] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:40:59,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:40:59,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2023-01-27 19:40:59,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126504001] [2023-01-27 19:40:59,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:40:59,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 19:40:59,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:40:59,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 19:40:59,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=481, Unknown=1, NotChecked=44, Total=600 [2023-01-27 19:40:59,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-01-27 19:40:59,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 262 transitions, 3863 flow. Second operand has 25 states, 25 states have (on average 109.92) internal successors, (2748), 25 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:40:59,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:40:59,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-01-27 19:40:59,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:41:04,973 INFO L130 PetriNetUnfolder]: 1290/2455 cut-off events. [2023-01-27 19:41:04,974 INFO L131 PetriNetUnfolder]: For 97214/97214 co-relation queries the response was YES. [2023-01-27 19:41:04,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22660 conditions, 2455 events. 1290/2455 cut-off events. For 97214/97214 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14920 event pairs, 313 based on Foata normal form. 4/2459 useless extension candidates. Maximal degree in co-relation 22542. Up to 2092 conditions per place. [2023-01-27 19:41:04,998 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 222 selfloop transitions, 71 changer transitions 13/306 dead transitions. [2023-01-27 19:41:04,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 306 transitions, 4888 flow [2023-01-27 19:41:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 19:41:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 19:41:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1488 transitions. [2023-01-27 19:41:05,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35327635327635326 [2023-01-27 19:41:05,001 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1488 transitions. [2023-01-27 19:41:05,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1488 transitions. [2023-01-27 19:41:05,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:41:05,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1488 transitions. [2023-01-27 19:41:05,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 114.46153846153847) internal successors, (1488), 13 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:05,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:05,020 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:05,020 INFO L175 Difference]: Start difference. First operand has 256 places, 262 transitions, 3863 flow. Second operand 13 states and 1488 transitions. [2023-01-27 19:41:05,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 306 transitions, 4888 flow [2023-01-27 19:41:05,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 306 transitions, 4636 flow, removed 88 selfloop flow, removed 10 redundant places. [2023-01-27 19:41:05,334 INFO L231 Difference]: Finished difference. Result has 259 places, 267 transitions, 3862 flow [2023-01-27 19:41:05,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3862, PETRI_PLACES=259, PETRI_TRANSITIONS=267} [2023-01-27 19:41:05,335 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 238 predicate places. [2023-01-27 19:41:05,335 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 267 transitions, 3862 flow [2023-01-27 19:41:05,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 109.92) internal successors, (2748), 25 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:05,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:41:05,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:41:05,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-27 19:41:05,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-27 19:41:05,541 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:41:05,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:41:05,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1001465655, now seen corresponding path program 9 times [2023-01-27 19:41:05,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:41:05,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856358404] [2023-01-27 19:41:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:41:05,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:41:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:41:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:41:06,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:41:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856358404] [2023-01-27 19:41:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856358404] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:41:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281219340] [2023-01-27 19:41:06,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:41:06,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:41:06,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:41:06,118 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:41:06,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-27 19:41:06,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 19:41:06,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:41:06,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 19:41:06,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:41:06,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:41:06,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:41:06,530 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 19:41:06,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2023-01-27 19:41:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:41:06,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:41:06,613 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1626 (Array Int Int))) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1626)) (.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select (select .cse0 c_~B~0.base) (+ .cse1 4 c_~B~0.offset)))))) is different from false [2023-01-27 19:41:06,686 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-01-27 19:41:06,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 145 [2023-01-27 19:41:06,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:41:06,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 55 [2023-01-27 19:41:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:41:06,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281219340] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:41:06,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:41:06,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-27 19:41:06,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966730919] [2023-01-27 19:41:06,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:41:06,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 19:41:06,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:41:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 19:41:06,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=528, Unknown=1, NotChecked=46, Total=650 [2023-01-27 19:41:06,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 324 [2023-01-27 19:41:06,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 267 transitions, 3862 flow. Second operand has 26 states, 26 states have (on average 105.84615384615384) internal successors, (2752), 26 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:06,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:41:06,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 324 [2023-01-27 19:41:06,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:41:08,099 INFO L130 PetriNetUnfolder]: 1282/2442 cut-off events. [2023-01-27 19:41:08,100 INFO L131 PetriNetUnfolder]: For 91917/91917 co-relation queries the response was YES. [2023-01-27 19:41:08,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22353 conditions, 2442 events. 1282/2442 cut-off events. For 91917/91917 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14849 event pairs, 339 based on Foata normal form. 4/2446 useless extension candidates. Maximal degree in co-relation 22236. Up to 2092 conditions per place. [2023-01-27 19:41:08,137 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 225 selfloop transitions, 64 changer transitions 13/302 dead transitions. [2023-01-27 19:41:08,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 302 transitions, 4790 flow [2023-01-27 19:41:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 19:41:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 19:41:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1221 transitions. [2023-01-27 19:41:08,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3425925925925926 [2023-01-27 19:41:08,139 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1221 transitions. [2023-01-27 19:41:08,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1221 transitions. [2023-01-27 19:41:08,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:41:08,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1221 transitions. [2023-01-27 19:41:08,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:08,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 324.0) internal successors, (3888), 12 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:08,142 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 324.0) internal successors, (3888), 12 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:08,142 INFO L175 Difference]: Start difference. First operand has 259 places, 267 transitions, 3862 flow. Second operand 11 states and 1221 transitions. [2023-01-27 19:41:08,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 302 transitions, 4790 flow [2023-01-27 19:41:08,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 302 transitions, 4623 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-01-27 19:41:08,336 INFO L231 Difference]: Finished difference. Result has 257 places, 265 transitions, 3809 flow [2023-01-27 19:41:08,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3809, PETRI_PLACES=257, PETRI_TRANSITIONS=265} [2023-01-27 19:41:08,337 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2023-01-27 19:41:08,337 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 265 transitions, 3809 flow [2023-01-27 19:41:08,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 105.84615384615384) internal successors, (2752), 26 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:08,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:41:08,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:41:08,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-27 19:41:08,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:41:08,543 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:41:08,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:41:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 695500837, now seen corresponding path program 10 times [2023-01-27 19:41:08,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:41:08,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23794082] [2023-01-27 19:41:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:41:08,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:41:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:41:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:41:09,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:41:09,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23794082] [2023-01-27 19:41:09,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23794082] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:41:09,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40089675] [2023-01-27 19:41:09,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:41:09,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:41:09,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:41:09,030 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:41:09,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-27 19:41:09,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:41:09,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:41:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 19:41:09,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:41:09,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:41:09,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 19:41:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:41:09,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:41:09,511 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1673 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1673))) (let ((.cse0 (select .cse1 ~B~0.base))) (or (= (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork1_#t~mem1|) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ .cse2 ~B~0.offset 4))))))))) is different from false [2023-01-27 19:41:09,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:41:09,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 178 [2023-01-27 19:41:09,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:41:09,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 89 [2023-01-27 19:41:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:41:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40089675] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:41:10,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:41:10,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-01-27 19:41:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753635170] [2023-01-27 19:41:10,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:41:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 19:41:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:41:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 19:41:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=480, Unknown=1, NotChecked=44, Total=600 [2023-01-27 19:41:10,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 324 [2023-01-27 19:41:10,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 265 transitions, 3809 flow. Second operand has 25 states, 25 states have (on average 110.08) internal successors, (2752), 25 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:10,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:41:10,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 324 [2023-01-27 19:41:10,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:41:17,385 INFO L130 PetriNetUnfolder]: 1288/2437 cut-off events. [2023-01-27 19:41:17,386 INFO L131 PetriNetUnfolder]: For 92487/92487 co-relation queries the response was YES. [2023-01-27 19:41:17,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22393 conditions, 2437 events. 1288/2437 cut-off events. For 92487/92487 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14708 event pairs, 328 based on Foata normal form. 4/2441 useless extension candidates. Maximal degree in co-relation 22288. Up to 2011 conditions per place. [2023-01-27 19:41:17,410 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 206 selfloop transitions, 103 changer transitions 3/312 dead transitions. [2023-01-27 19:41:17,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 312 transitions, 5133 flow [2023-01-27 19:41:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 19:41:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 19:41:17,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1816 transitions. [2023-01-27 19:41:17,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35030864197530864 [2023-01-27 19:41:17,413 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1816 transitions. [2023-01-27 19:41:17,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1816 transitions. [2023-01-27 19:41:17,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:41:17,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1816 transitions. [2023-01-27 19:41:17,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 113.5) internal successors, (1816), 16 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:17,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:17,417 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 324.0) internal successors, (5508), 17 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:17,417 INFO L175 Difference]: Start difference. First operand has 257 places, 265 transitions, 3809 flow. Second operand 16 states and 1816 transitions. [2023-01-27 19:41:17,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 312 transitions, 5133 flow [2023-01-27 19:41:17,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 312 transitions, 4983 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-01-27 19:41:17,608 INFO L231 Difference]: Finished difference. Result has 264 places, 280 transitions, 4218 flow [2023-01-27 19:41:17,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3681, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4218, PETRI_PLACES=264, PETRI_TRANSITIONS=280} [2023-01-27 19:41:17,610 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2023-01-27 19:41:17,610 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 280 transitions, 4218 flow [2023-01-27 19:41:17,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 110.08) internal successors, (2752), 25 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:17,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:41:17,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:41:17,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-27 19:41:17,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:41:17,816 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:41:17,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:41:17,816 INFO L85 PathProgramCache]: Analyzing trace with hash 95734045, now seen corresponding path program 11 times [2023-01-27 19:41:17,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:41:17,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372160724] [2023-01-27 19:41:17,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:41:17,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:41:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:41:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:41:18,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:41:18,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372160724] [2023-01-27 19:41:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372160724] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:41:18,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355726593] [2023-01-27 19:41:18,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 19:41:18,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:41:18,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:41:18,349 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:41:18,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-27 19:41:18,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:41:18,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:41:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-27 19:41:18,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:41:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:41:18,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 19:41:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:41:18,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:41:18,958 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1720 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1720))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 4 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1 4))))) (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4)))))))) is different from false [2023-01-27 19:41:18,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:41:18,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 178 [2023-01-27 19:41:19,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:41:19,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 89 [2023-01-27 19:41:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:41:19,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355726593] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:41:19,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:41:19,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 25 [2023-01-27 19:41:19,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121967655] [2023-01-27 19:41:19,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:41:19,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 19:41:19,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:41:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 19:41:19,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=520, Unknown=1, NotChecked=46, Total=650 [2023-01-27 19:41:19,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 324 [2023-01-27 19:41:19,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 280 transitions, 4218 flow. Second operand has 26 states, 26 states have (on average 99.88461538461539) internal successors, (2597), 26 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:19,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:41:19,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 324 [2023-01-27 19:41:19,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:41:24,978 INFO L130 PetriNetUnfolder]: 1268/2397 cut-off events. [2023-01-27 19:41:24,978 INFO L131 PetriNetUnfolder]: For 99125/99125 co-relation queries the response was YES. [2023-01-27 19:41:24,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22955 conditions, 2397 events. 1268/2397 cut-off events. For 99125/99125 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14379 event pairs, 319 based on Foata normal form. 8/2405 useless extension candidates. Maximal degree in co-relation 22837. Up to 2057 conditions per place. [2023-01-27 19:41:25,004 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 210 selfloop transitions, 85 changer transitions 15/310 dead transitions. [2023-01-27 19:41:25,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 310 transitions, 5098 flow [2023-01-27 19:41:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 19:41:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 19:41:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1752 transitions. [2023-01-27 19:41:25,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31808278867102396 [2023-01-27 19:41:25,007 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1752 transitions. [2023-01-27 19:41:25,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1752 transitions. [2023-01-27 19:41:25,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:41:25,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1752 transitions. [2023-01-27 19:41:25,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 103.05882352941177) internal successors, (1752), 17 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:25,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:25,041 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:25,041 INFO L175 Difference]: Start difference. First operand has 264 places, 280 transitions, 4218 flow. Second operand 17 states and 1752 transitions. [2023-01-27 19:41:25,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 310 transitions, 5098 flow [2023-01-27 19:41:25,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 310 transitions, 4832 flow, removed 39 selfloop flow, removed 12 redundant places. [2023-01-27 19:41:25,325 INFO L231 Difference]: Finished difference. Result has 268 places, 276 transitions, 4074 flow [2023-01-27 19:41:25,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4074, PETRI_PLACES=268, PETRI_TRANSITIONS=276} [2023-01-27 19:41:25,326 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 247 predicate places. [2023-01-27 19:41:25,326 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 276 transitions, 4074 flow [2023-01-27 19:41:25,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 99.88461538461539) internal successors, (2597), 26 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:25,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:41:25,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:41:25,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-27 19:41:25,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:41:25,533 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:41:25,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:41:25,533 INFO L85 PathProgramCache]: Analyzing trace with hash -185131032, now seen corresponding path program 18 times [2023-01-27 19:41:25,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:41:25,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838291184] [2023-01-27 19:41:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:41:25,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:41:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:41:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:41:26,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:41:26,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838291184] [2023-01-27 19:41:26,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838291184] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:41:26,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944230871] [2023-01-27 19:41:26,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 19:41:26,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:41:26,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:41:26,120 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:41:26,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-27 19:41:26,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 19:41:26,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:41:26,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 19:41:26,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:41:26,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:41:26,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 19:41:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:41:26,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:41:26,915 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~i_AB~0 4))) (let ((.cse4 (+ c_~i_BA~0 1)) (.cse5 (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767) ~B~0.base) (+ ~B~0.offset .cse3))))))) (and (forall ((v_ArrVal_1767 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1767))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select .cse2 (+ .cse1 ~B~0.offset 4)))) (not (= |c_thread1Thread1of1ForFork1_#t~mem1| (select .cse2 (+ ~B~0.offset .cse3)))))))) (or (< .cse4 c_~Bn~0) .cse5) (or (< .cse4 c_~An~0) .cse5)))) is different from false [2023-01-27 19:41:27,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:41:27,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 373 [2023-01-27 19:41:27,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:41:27,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 157 [2023-01-27 19:41:27,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 115 [2023-01-27 19:41:27,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 109 [2023-01-27 19:41:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:41:34,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944230871] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:41:34,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:41:34,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 26 [2023-01-27 19:41:34,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638835842] [2023-01-27 19:41:34,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:41:34,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 19:41:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:41:34,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 19:41:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2023-01-27 19:41:34,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-01-27 19:41:34,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 276 transitions, 4074 flow. Second operand has 27 states, 27 states have (on average 86.0) internal successors, (2322), 27 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:41:34,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:41:34,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-01-27 19:41:34,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:41:47,259 WARN L222 SmtUtils]: Spent 10.87s on a formula simplification. DAG size of input: 68 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 19:41:58,248 WARN L222 SmtUtils]: Spent 10.90s on a formula simplification. DAG size of input: 60 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 19:42:01,047 INFO L130 PetriNetUnfolder]: 1297/2480 cut-off events. [2023-01-27 19:42:01,047 INFO L131 PetriNetUnfolder]: For 102715/102715 co-relation queries the response was YES. [2023-01-27 19:42:01,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23074 conditions, 2480 events. 1297/2480 cut-off events. For 102715/102715 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15121 event pairs, 254 based on Foata normal form. 50/2530 useless extension candidates. Maximal degree in co-relation 22955. Up to 1896 conditions per place. [2023-01-27 19:42:01,072 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 228 selfloop transitions, 117 changer transitions 4/349 dead transitions. [2023-01-27 19:42:01,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 349 transitions, 5584 flow [2023-01-27 19:42:01,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 19:42:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 19:42:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2401 transitions. [2023-01-27 19:42:01,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27446273433927754 [2023-01-27 19:42:01,075 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2401 transitions. [2023-01-27 19:42:01,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2401 transitions. [2023-01-27 19:42:01,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:01,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2401 transitions. [2023-01-27 19:42:01,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 88.92592592592592) internal successors, (2401), 27 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:01,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:01,081 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:01,081 INFO L175 Difference]: Start difference. First operand has 268 places, 276 transitions, 4074 flow. Second operand 27 states and 2401 transitions. [2023-01-27 19:42:01,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 349 transitions, 5584 flow [2023-01-27 19:42:01,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 349 transitions, 5279 flow, removed 31 selfloop flow, removed 19 redundant places. [2023-01-27 19:42:01,294 INFO L231 Difference]: Finished difference. Result has 281 places, 290 transitions, 4380 flow [2023-01-27 19:42:01,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4380, PETRI_PLACES=281, PETRI_TRANSITIONS=290} [2023-01-27 19:42:01,295 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 260 predicate places. [2023-01-27 19:42:01,295 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 290 transitions, 4380 flow [2023-01-27 19:42:01,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 86.0) internal successors, (2322), 27 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:01,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:01,296 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:01,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:01,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-27 19:42:01,509 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:01,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:01,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1268623832, now seen corresponding path program 19 times [2023-01-27 19:42:01,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:01,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908615967] [2023-01-27 19:42:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:01,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:42:02,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:02,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908615967] [2023-01-27 19:42:02,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908615967] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:02,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132435496] [2023-01-27 19:42:02,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 19:42:02,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:02,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:02,386 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:02,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-27 19:42:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:02,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 19:42:02,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:02,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 19:42:02,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 19:42:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:42:03,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:03,354 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~i_AB~0 4))) (let ((.cse4 (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1814 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1814) ~B~0.base) (+ ~B~0.offset .cse1)) |c_thread1Thread1of1ForFork1_#t~mem1|)))) (.cse5 (+ c_~i_BA~0 1))) (and (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_1814 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1814))) (let ((.cse0 (select .cse2 ~B~0.base))) (or (not (= (select .cse0 (+ ~B~0.offset .cse1)) |c_thread1Thread1of1ForFork1_#t~mem1|)) (let ((.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3 4)) (select .cse0 (+ .cse3 ~B~0.offset 4)))))))) (or .cse4 (< .cse5 c_~An~0)) (or .cse4 (< .cse5 c_~Bn~0))))) is different from false [2023-01-27 19:42:03,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:42:03,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-01-27 19:42:03,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-27 19:42:03,426 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-01-27 19:42:03,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 161 [2023-01-27 19:42:03,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:42:03,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 95 [2023-01-27 19:42:03,865 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:42:03,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2023-01-27 19:42:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:42:04,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132435496] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:04,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:04,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2023-01-27 19:42:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132590256] [2023-01-27 19:42:04,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:04,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-27 19:42:04,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:04,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-27 19:42:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1075, Unknown=1, NotChecked=66, Total=1260 [2023-01-27 19:42:04,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 324 [2023-01-27 19:42:04,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 290 transitions, 4380 flow. Second operand has 36 states, 36 states have (on average 85.55555555555556) internal successors, (3080), 36 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:04,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:04,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 324 [2023-01-27 19:42:04,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:07,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 19:42:08,367 INFO L130 PetriNetUnfolder]: 1284/2430 cut-off events. [2023-01-27 19:42:08,367 INFO L131 PetriNetUnfolder]: For 131438/131438 co-relation queries the response was YES. [2023-01-27 19:42:08,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24586 conditions, 2430 events. 1284/2430 cut-off events. For 131438/131438 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14549 event pairs, 290 based on Foata normal form. 2/2432 useless extension candidates. Maximal degree in co-relation 24463. Up to 2322 conditions per place. [2023-01-27 19:42:08,402 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 242 selfloop transitions, 53 changer transitions 5/300 dead transitions. [2023-01-27 19:42:08,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 300 transitions, 5044 flow [2023-01-27 19:42:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 19:42:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 19:42:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1313 transitions. [2023-01-27 19:42:08,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27016460905349793 [2023-01-27 19:42:08,426 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1313 transitions. [2023-01-27 19:42:08,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1313 transitions. [2023-01-27 19:42:08,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:08,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1313 transitions. [2023-01-27 19:42:08,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 87.53333333333333) internal successors, (1313), 15 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:08,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:08,429 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 324.0) internal successors, (5184), 16 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:08,429 INFO L175 Difference]: Start difference. First operand has 281 places, 290 transitions, 4380 flow. Second operand 15 states and 1313 transitions. [2023-01-27 19:42:08,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 300 transitions, 5044 flow [2023-01-27 19:42:08,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 300 transitions, 4838 flow, removed 21 selfloop flow, removed 17 redundant places. [2023-01-27 19:42:08,704 INFO L231 Difference]: Finished difference. Result has 278 places, 286 transitions, 4224 flow [2023-01-27 19:42:08,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4224, PETRI_PLACES=278, PETRI_TRANSITIONS=286} [2023-01-27 19:42:08,705 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-01-27 19:42:08,705 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 286 transitions, 4224 flow [2023-01-27 19:42:08,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 85.55555555555556) internal successors, (3080), 36 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:08,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:08,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:08,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:08,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-01-27 19:42:08,918 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:08,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash 654676370, now seen corresponding path program 20 times [2023-01-27 19:42:08,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:08,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809659392] [2023-01-27 19:42:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:08,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:09,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809659392] [2023-01-27 19:42:09,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809659392] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190018160] [2023-01-27 19:42:09,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:42:09,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:09,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:09,102 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:09,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-27 19:42:09,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:42:09,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:42:09,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-27 19:42:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:09,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:09,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190018160] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:09,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:09,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-01-27 19:42:09,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976438833] [2023-01-27 19:42:09,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:09,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 19:42:09,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:09,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 19:42:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-01-27 19:42:09,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2023-01-27 19:42:09,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 286 transitions, 4224 flow. Second operand has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:09,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:09,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2023-01-27 19:42:09,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:10,104 INFO L130 PetriNetUnfolder]: 1610/3039 cut-off events. [2023-01-27 19:42:10,104 INFO L131 PetriNetUnfolder]: For 144393/144393 co-relation queries the response was YES. [2023-01-27 19:42:10,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29530 conditions, 3039 events. 1610/3039 cut-off events. For 144393/144393 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19145 event pairs, 284 based on Foata normal form. 5/3044 useless extension candidates. Maximal degree in co-relation 29409. Up to 2072 conditions per place. [2023-01-27 19:42:10,137 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 261 selfloop transitions, 103 changer transitions 2/366 dead transitions. [2023-01-27 19:42:10,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 366 transitions, 6141 flow [2023-01-27 19:42:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 19:42:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 19:42:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1433 transitions. [2023-01-27 19:42:10,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422839506172839 [2023-01-27 19:42:10,140 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1433 transitions. [2023-01-27 19:42:10,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1433 transitions. [2023-01-27 19:42:10,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:10,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1433 transitions. [2023-01-27 19:42:10,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 143.3) internal successors, (1433), 10 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 19:42:10,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:10,156 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:10,156 INFO L175 Difference]: Start difference. First operand has 278 places, 286 transitions, 4224 flow. Second operand 10 states and 1433 transitions. [2023-01-27 19:42:10,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 366 transitions, 6141 flow [2023-01-27 19:42:10,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 366 transitions, 6005 flow, removed 1 selfloop flow, removed 17 redundant places. [2023-01-27 19:42:10,503 INFO L231 Difference]: Finished difference. Result has 272 places, 313 transitions, 4890 flow [2023-01-27 19:42:10,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4890, PETRI_PLACES=272, PETRI_TRANSITIONS=313} [2023-01-27 19:42:10,504 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 251 predicate places. [2023-01-27 19:42:10,504 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 313 transitions, 4890 flow [2023-01-27 19:42:10,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:10,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:10,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:10,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:10,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-27 19:42:10,711 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:10,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1667538898, now seen corresponding path program 21 times [2023-01-27 19:42:10,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:10,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843207513] [2023-01-27 19:42:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:10,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:10,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:10,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843207513] [2023-01-27 19:42:10,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843207513] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:10,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595324319] [2023-01-27 19:42:10,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:42:10,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:10,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:10,865 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:10,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-27 19:42:11,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 19:42:11,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:42:11,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 19:42:11,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:42:11,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:42:12,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595324319] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:12,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:12,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 25 [2023-01-27 19:42:12,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166628489] [2023-01-27 19:42:12,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:12,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 19:42:12,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:12,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 19:42:12,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2023-01-27 19:42:12,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 324 [2023-01-27 19:42:12,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 313 transitions, 4890 flow. Second operand has 27 states, 27 states have (on average 108.33333333333333) internal successors, (2925), 27 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:12,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:12,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 324 [2023-01-27 19:42:12,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:13,765 INFO L130 PetriNetUnfolder]: 1836/3452 cut-off events. [2023-01-27 19:42:13,766 INFO L131 PetriNetUnfolder]: For 180124/180124 co-relation queries the response was YES. [2023-01-27 19:42:13,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35464 conditions, 3452 events. 1836/3452 cut-off events. For 180124/180124 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22486 event pairs, 120 based on Foata normal form. 15/3467 useless extension candidates. Maximal degree in co-relation 35344. Up to 1192 conditions per place. [2023-01-27 19:42:13,803 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 255 selfloop transitions, 198 changer transitions 6/459 dead transitions. [2023-01-27 19:42:13,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 459 transitions, 8233 flow [2023-01-27 19:42:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 19:42:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 19:42:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2463 transitions. [2023-01-27 19:42:13,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34553872053872053 [2023-01-27 19:42:13,805 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2463 transitions. [2023-01-27 19:42:13,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2463 transitions. [2023-01-27 19:42:13,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:13,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2463 transitions. [2023-01-27 19:42:13,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 111.95454545454545) internal successors, (2463), 22 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:13,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:13,811 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:13,811 INFO L175 Difference]: Start difference. First operand has 272 places, 313 transitions, 4890 flow. Second operand 22 states and 2463 transitions. [2023-01-27 19:42:13,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 459 transitions, 8233 flow [2023-01-27 19:42:14,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 459 transitions, 7825 flow, removed 185 selfloop flow, removed 2 redundant places. [2023-01-27 19:42:14,220 INFO L231 Difference]: Finished difference. Result has 299 places, 349 transitions, 5982 flow [2023-01-27 19:42:14,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4638, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5982, PETRI_PLACES=299, PETRI_TRANSITIONS=349} [2023-01-27 19:42:14,221 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 278 predicate places. [2023-01-27 19:42:14,221 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 349 transitions, 5982 flow [2023-01-27 19:42:14,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 108.33333333333333) internal successors, (2925), 27 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:14,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:14,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:14,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:14,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-01-27 19:42:14,427 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:14,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1628592980, now seen corresponding path program 22 times [2023-01-27 19:42:14,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:14,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466919717] [2023-01-27 19:42:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:14,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:14,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:14,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466919717] [2023-01-27 19:42:14,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466919717] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:14,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178467425] [2023-01-27 19:42:14,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:42:14,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:14,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:14,609 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:14,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-27 19:42:14,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:42:14,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:42:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 19:42:14,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:15,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:42:15,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178467425] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:15,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:15,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 14 [2023-01-27 19:42:15,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270700265] [2023-01-27 19:42:15,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:15,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 19:42:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 19:42:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-01-27 19:42:15,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2023-01-27 19:42:15,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 349 transitions, 5982 flow. Second operand has 16 states, 16 states have (on average 131.5625) internal successors, (2105), 16 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:15,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:15,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2023-01-27 19:42:15,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:16,528 INFO L130 PetriNetUnfolder]: 2288/4327 cut-off events. [2023-01-27 19:42:16,528 INFO L131 PetriNetUnfolder]: For 256898/256898 co-relation queries the response was YES. [2023-01-27 19:42:16,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47350 conditions, 4327 events. 2288/4327 cut-off events. For 256898/256898 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 29707 event pairs, 214 based on Foata normal form. 87/4414 useless extension candidates. Maximal degree in co-relation 47219. Up to 1590 conditions per place. [2023-01-27 19:42:16,584 INFO L137 encePairwiseOnDemand]: 319/324 looper letters, 316 selfloop transitions, 224 changer transitions 23/563 dead transitions. [2023-01-27 19:42:16,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 563 transitions, 11022 flow [2023-01-27 19:42:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 19:42:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 19:42:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3673 transitions. [2023-01-27 19:42:16,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41986739826246 [2023-01-27 19:42:16,601 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3673 transitions. [2023-01-27 19:42:16,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3673 transitions. [2023-01-27 19:42:16,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:16,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3673 transitions. [2023-01-27 19:42:16,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 136.03703703703704) internal successors, (3673), 27 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:16,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:16,608 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:16,608 INFO L175 Difference]: Start difference. First operand has 299 places, 349 transitions, 5982 flow. Second operand 27 states and 3673 transitions. [2023-01-27 19:42:16,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 563 transitions, 11022 flow [2023-01-27 19:42:17,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 563 transitions, 10436 flow, removed 238 selfloop flow, removed 11 redundant places. [2023-01-27 19:42:17,473 INFO L231 Difference]: Finished difference. Result has 326 places, 401 transitions, 7575 flow [2023-01-27 19:42:17,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=5446, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7575, PETRI_PLACES=326, PETRI_TRANSITIONS=401} [2023-01-27 19:42:17,474 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 305 predicate places. [2023-01-27 19:42:17,474 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 401 transitions, 7575 flow [2023-01-27 19:42:17,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 131.5625) internal successors, (2105), 16 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:17,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:17,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:17,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:17,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:17,680 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:17,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1095367968, now seen corresponding path program 23 times [2023-01-27 19:42:17,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:17,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039571069] [2023-01-27 19:42:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:17,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:17,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:17,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039571069] [2023-01-27 19:42:17,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039571069] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:17,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527992241] [2023-01-27 19:42:17,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 19:42:17,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:17,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:17,829 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:17,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-27 19:42:18,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 19:42:18,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:42:18,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-27 19:42:18,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:18,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:42:18,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527992241] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:18,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:18,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-01-27 19:42:18,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218396862] [2023-01-27 19:42:18,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:18,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 19:42:18,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:18,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 19:42:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-01-27 19:42:18,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2023-01-27 19:42:18,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 401 transitions, 7575 flow. Second operand has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:18,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:18,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2023-01-27 19:42:18,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:19,557 INFO L130 PetriNetUnfolder]: 2638/4974 cut-off events. [2023-01-27 19:42:19,558 INFO L131 PetriNetUnfolder]: For 311189/311189 co-relation queries the response was YES. [2023-01-27 19:42:19,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56102 conditions, 4974 events. 2638/4974 cut-off events. For 311189/311189 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 34953 event pairs, 585 based on Foata normal form. 6/4980 useless extension candidates. Maximal degree in co-relation 55962. Up to 3661 conditions per place. [2023-01-27 19:42:19,624 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 377 selfloop transitions, 122 changer transitions 6/505 dead transitions. [2023-01-27 19:42:19,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 505 transitions, 10800 flow [2023-01-27 19:42:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 19:42:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 19:42:19,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1423 transitions. [2023-01-27 19:42:19,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43919753086419755 [2023-01-27 19:42:19,626 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1423 transitions. [2023-01-27 19:42:19,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1423 transitions. [2023-01-27 19:42:19,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:19,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1423 transitions. [2023-01-27 19:42:19,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 142.3) internal successors, (1423), 10 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:19,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:19,629 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 324.0) internal successors, (3564), 11 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:19,629 INFO L175 Difference]: Start difference. First operand has 326 places, 401 transitions, 7575 flow. Second operand 10 states and 1423 transitions. [2023-01-27 19:42:19,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 505 transitions, 10800 flow [2023-01-27 19:42:20,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 505 transitions, 9729 flow, removed 503 selfloop flow, removed 8 redundant places. [2023-01-27 19:42:20,497 INFO L231 Difference]: Finished difference. Result has 328 places, 442 transitions, 8226 flow [2023-01-27 19:42:20,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6915, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8226, PETRI_PLACES=328, PETRI_TRANSITIONS=442} [2023-01-27 19:42:20,498 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 307 predicate places. [2023-01-27 19:42:20,498 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 442 transitions, 8226 flow [2023-01-27 19:42:20,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.3) internal successors, (1383), 10 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:20,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:20,499 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:20,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:20,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-27 19:42:20,705 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:20,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:20,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1159595898, now seen corresponding path program 24 times [2023-01-27 19:42:20,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:20,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306073746] [2023-01-27 19:42:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:20,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:42:20,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306073746] [2023-01-27 19:42:20,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306073746] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:20,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771912953] [2023-01-27 19:42:20,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 19:42:20,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:20,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:20,887 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:20,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-27 19:42:21,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 19:42:21,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:42:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 19:42:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:42:21,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:42:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771912953] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:21,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:21,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-01-27 19:42:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693426532] [2023-01-27 19:42:21,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:21,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 19:42:21,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:21,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 19:42:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-01-27 19:42:21,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 324 [2023-01-27 19:42:21,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 442 transitions, 8226 flow. Second operand has 21 states, 21 states have (on average 113.61904761904762) internal successors, (2386), 21 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:21,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:21,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 324 [2023-01-27 19:42:21,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:24,531 INFO L130 PetriNetUnfolder]: 5171/10276 cut-off events. [2023-01-27 19:42:24,531 INFO L131 PetriNetUnfolder]: For 528535/528535 co-relation queries the response was YES. [2023-01-27 19:42:24,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105325 conditions, 10276 events. 5171/10276 cut-off events. For 528535/528535 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 86688 event pairs, 1188 based on Foata normal form. 644/10920 useless extension candidates. Maximal degree in co-relation 105184. Up to 3935 conditions per place. [2023-01-27 19:42:24,641 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 702 selfloop transitions, 207 changer transitions 102/1011 dead transitions. [2023-01-27 19:42:24,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1011 transitions, 20158 flow [2023-01-27 19:42:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 19:42:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 19:42:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2462 transitions. [2023-01-27 19:42:24,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3618459729570841 [2023-01-27 19:42:24,644 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2462 transitions. [2023-01-27 19:42:24,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2462 transitions. [2023-01-27 19:42:24,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:24,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2462 transitions. [2023-01-27 19:42:24,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 117.23809523809524) internal successors, (2462), 21 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:24,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:24,649 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:24,649 INFO L175 Difference]: Start difference. First operand has 328 places, 442 transitions, 8226 flow. Second operand 21 states and 2462 transitions. [2023-01-27 19:42:24,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1011 transitions, 20158 flow [2023-01-27 19:42:26,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1011 transitions, 19757 flow, removed 53 selfloop flow, removed 7 redundant places. [2023-01-27 19:42:26,603 INFO L231 Difference]: Finished difference. Result has 347 places, 589 transitions, 11535 flow [2023-01-27 19:42:26,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7876, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11535, PETRI_PLACES=347, PETRI_TRANSITIONS=589} [2023-01-27 19:42:26,607 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 326 predicate places. [2023-01-27 19:42:26,607 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 589 transitions, 11535 flow [2023-01-27 19:42:26,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.61904761904762) internal successors, (2386), 21 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:26,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:26,608 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:26,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:26,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-27 19:42:26,814 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:26,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:26,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1130693087, now seen corresponding path program 25 times [2023-01-27 19:42:26,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:26,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857588245] [2023-01-27 19:42:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:26,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:26,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857588245] [2023-01-27 19:42:26,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857588245] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392744499] [2023-01-27 19:42:26,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 19:42:26,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:26,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:26,985 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:27,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-27 19:42:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:27,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 19:42:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:27,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:27,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392744499] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:27,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:27,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-01-27 19:42:27,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532410419] [2023-01-27 19:42:27,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:27,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 19:42:27,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:27,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 19:42:27,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-01-27 19:42:27,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 324 [2023-01-27 19:42:27,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 589 transitions, 11535 flow. Second operand has 21 states, 21 states have (on average 113.42857142857143) internal successors, (2382), 21 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:27,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:27,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 324 [2023-01-27 19:42:27,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:29,611 INFO L130 PetriNetUnfolder]: 2923/5695 cut-off events. [2023-01-27 19:42:29,611 INFO L131 PetriNetUnfolder]: For 322551/322551 co-relation queries the response was YES. [2023-01-27 19:42:29,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61968 conditions, 5695 events. 2923/5695 cut-off events. For 322551/322551 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 41032 event pairs, 1310 based on Foata normal form. 147/5842 useless extension candidates. Maximal degree in co-relation 61819. Up to 4313 conditions per place. [2023-01-27 19:42:29,671 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 382 selfloop transitions, 8 changer transitions 305/695 dead transitions. [2023-01-27 19:42:29,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 695 transitions, 14330 flow [2023-01-27 19:42:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 19:42:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 19:42:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2439 transitions. [2023-01-27 19:42:29,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3584656084656085 [2023-01-27 19:42:29,673 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2439 transitions. [2023-01-27 19:42:29,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2439 transitions. [2023-01-27 19:42:29,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:29,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2439 transitions. [2023-01-27 19:42:29,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 116.14285714285714) internal successors, (2439), 21 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:29,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:29,678 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:29,678 INFO L175 Difference]: Start difference. First operand has 347 places, 589 transitions, 11535 flow. Second operand 21 states and 2439 transitions. [2023-01-27 19:42:29,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 695 transitions, 14330 flow [2023-01-27 19:42:30,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 695 transitions, 13988 flow, removed 144 selfloop flow, removed 10 redundant places. [2023-01-27 19:42:30,806 INFO L231 Difference]: Finished difference. Result has 359 places, 390 transitions, 7375 flow [2023-01-27 19:42:30,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=9448, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7375, PETRI_PLACES=359, PETRI_TRANSITIONS=390} [2023-01-27 19:42:30,807 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 338 predicate places. [2023-01-27 19:42:30,807 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 390 transitions, 7375 flow [2023-01-27 19:42:30,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.42857142857143) internal successors, (2382), 21 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:30,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:30,808 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:30,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:31,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-01-27 19:42:31,014 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:31,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:31,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1913132125, now seen corresponding path program 26 times [2023-01-27 19:42:31,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:31,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909391308] [2023-01-27 19:42:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:31,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:31,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:31,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909391308] [2023-01-27 19:42:31,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909391308] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:31,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292807930] [2023-01-27 19:42:31,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:42:31,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:31,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:31,233 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:31,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-27 19:42:31,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:42:31,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:42:31,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-27 19:42:31,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:31,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:31,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292807930] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:31,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:31,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-01-27 19:42:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481805791] [2023-01-27 19:42:31,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:31,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 19:42:31,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 19:42:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-01-27 19:42:31,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 324 [2023-01-27 19:42:31,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 390 transitions, 7375 flow. Second operand has 30 states, 30 states have (on average 112.83333333333333) internal successors, (3385), 30 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:31,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:31,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 324 [2023-01-27 19:42:31,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:33,450 INFO L130 PetriNetUnfolder]: 2342/4272 cut-off events. [2023-01-27 19:42:33,450 INFO L131 PetriNetUnfolder]: For 249177/249177 co-relation queries the response was YES. [2023-01-27 19:42:33,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47451 conditions, 4272 events. 2342/4272 cut-off events. For 249177/249177 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28321 event pairs, 234 based on Foata normal form. 75/4347 useless extension candidates. Maximal degree in co-relation 47299. Up to 1367 conditions per place. [2023-01-27 19:42:33,544 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 322 selfloop transitions, 158 changer transitions 1/481 dead transitions. [2023-01-27 19:42:33,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 481 transitions, 9844 flow [2023-01-27 19:42:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 19:42:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 19:42:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1504 transitions. [2023-01-27 19:42:33,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570750237416904 [2023-01-27 19:42:33,578 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1504 transitions. [2023-01-27 19:42:33,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1504 transitions. [2023-01-27 19:42:33,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:33,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1504 transitions. [2023-01-27 19:42:33,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.6923076923077) internal successors, (1504), 13 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:33,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:33,581 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 324.0) internal successors, (4536), 14 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:33,582 INFO L175 Difference]: Start difference. First operand has 359 places, 390 transitions, 7375 flow. Second operand 13 states and 1504 transitions. [2023-01-27 19:42:33,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 481 transitions, 9844 flow [2023-01-27 19:42:34,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 481 transitions, 9362 flow, removed 176 selfloop flow, removed 36 redundant places. [2023-01-27 19:42:34,191 INFO L231 Difference]: Finished difference. Result has 297 places, 401 transitions, 7684 flow [2023-01-27 19:42:34,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6776, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7684, PETRI_PLACES=297, PETRI_TRANSITIONS=401} [2023-01-27 19:42:34,192 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 276 predicate places. [2023-01-27 19:42:34,192 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 401 transitions, 7684 flow [2023-01-27 19:42:34,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 112.83333333333333) internal successors, (3385), 30 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:34,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:34,193 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:34,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:34,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:34,398 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:34,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:34,399 INFO L85 PathProgramCache]: Analyzing trace with hash -326833819, now seen corresponding path program 12 times [2023-01-27 19:42:34,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:34,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98047729] [2023-01-27 19:42:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:34,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:35,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:35,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98047729] [2023-01-27 19:42:35,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98047729] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:35,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070256419] [2023-01-27 19:42:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 19:42:35,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:35,089 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:35,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-27 19:42:35,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 19:42:35,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:42:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 19:42:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:42:35,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:35,932 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:42:35,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:42:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:42:36,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070256419] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:36,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:36,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 27 [2023-01-27 19:42:36,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728823171] [2023-01-27 19:42:36,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:36,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 19:42:36,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:36,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 19:42:36,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2023-01-27 19:42:36,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-27 19:42:36,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 401 transitions, 7684 flow. Second operand has 28 states, 28 states have (on average 104.10714285714286) internal successors, (2915), 28 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:36,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:36,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-27 19:42:36,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:37,943 INFO L130 PetriNetUnfolder]: 2371/4349 cut-off events. [2023-01-27 19:42:37,943 INFO L131 PetriNetUnfolder]: For 247452/247452 co-relation queries the response was YES. [2023-01-27 19:42:37,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47765 conditions, 4349 events. 2371/4349 cut-off events. For 247452/247452 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 29064 event pairs, 463 based on Foata normal form. 8/4357 useless extension candidates. Maximal degree in co-relation 47635. Up to 3446 conditions per place. [2023-01-27 19:42:37,990 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 353 selfloop transitions, 126 changer transitions 29/508 dead transitions. [2023-01-27 19:42:37,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 508 transitions, 10138 flow [2023-01-27 19:42:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 19:42:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 19:42:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2061 transitions. [2023-01-27 19:42:37,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3347953216374269 [2023-01-27 19:42:37,992 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2061 transitions. [2023-01-27 19:42:37,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2061 transitions. [2023-01-27 19:42:37,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:37,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2061 transitions. [2023-01-27 19:42:37,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 108.47368421052632) internal successors, (2061), 19 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:37,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:37,996 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:37,996 INFO L175 Difference]: Start difference. First operand has 297 places, 401 transitions, 7684 flow. Second operand 19 states and 2061 transitions. [2023-01-27 19:42:37,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 508 transitions, 10138 flow [2023-01-27 19:42:38,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 508 transitions, 9961 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-01-27 19:42:38,568 INFO L231 Difference]: Finished difference. Result has 309 places, 427 transitions, 8186 flow [2023-01-27 19:42:38,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7515, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8186, PETRI_PLACES=309, PETRI_TRANSITIONS=427} [2023-01-27 19:42:38,568 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-01-27 19:42:38,568 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 427 transitions, 8186 flow [2023-01-27 19:42:38,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 104.10714285714286) internal successors, (2915), 28 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:38,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:38,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:38,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:38,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:38,782 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:38,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1977088976, now seen corresponding path program 27 times [2023-01-27 19:42:38,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:38,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029478922] [2023-01-27 19:42:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:38,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:42:39,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:39,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029478922] [2023-01-27 19:42:39,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029478922] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:39,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20758463] [2023-01-27 19:42:39,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:42:39,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:39,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:39,573 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:39,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-27 19:42:39,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 19:42:39,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:42:39,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-27 19:42:39,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 19:42:40,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:41,046 INFO L321 Elim1Store]: treesize reduction 26, result has 86.7 percent of original size [2023-01-27 19:42:41,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 198 [2023-01-27 19:42:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 19:42:41,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20758463] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:41,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:41,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2023-01-27 19:42:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312491065] [2023-01-27 19:42:41,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:41,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-27 19:42:41,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:41,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-27 19:42:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2023-01-27 19:42:41,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:42:41,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 427 transitions, 8186 flow. Second operand has 45 states, 45 states have (on average 89.53333333333333) internal successors, (4029), 45 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:41,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:41,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:42:41,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:48,763 INFO L130 PetriNetUnfolder]: 3676/6705 cut-off events. [2023-01-27 19:42:48,763 INFO L131 PetriNetUnfolder]: For 369812/369812 co-relation queries the response was YES. [2023-01-27 19:42:48,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73743 conditions, 6705 events. 3676/6705 cut-off events. For 369812/369812 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 48234 event pairs, 161 based on Foata normal form. 34/6739 useless extension candidates. Maximal degree in co-relation 73609. Up to 3502 conditions per place. [2023-01-27 19:42:48,848 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 435 selfloop transitions, 522 changer transitions 6/963 dead transitions. [2023-01-27 19:42:48,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 963 transitions, 18547 flow [2023-01-27 19:42:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-01-27 19:42:48,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-01-27 19:42:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 6000 transitions. [2023-01-27 19:42:48,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28935185185185186 [2023-01-27 19:42:48,854 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 6000 transitions. [2023-01-27 19:42:48,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 6000 transitions. [2023-01-27 19:42:48,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:48,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 6000 transitions. [2023-01-27 19:42:48,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 93.75) internal successors, (6000), 64 states have internal predecessors, (6000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:48,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 324.0) internal successors, (21060), 65 states have internal predecessors, (21060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:48,875 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 324.0) internal successors, (21060), 65 states have internal predecessors, (21060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:48,876 INFO L175 Difference]: Start difference. First operand has 309 places, 427 transitions, 8186 flow. Second operand 64 states and 6000 transitions. [2023-01-27 19:42:48,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 963 transitions, 18547 flow [2023-01-27 19:42:50,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 963 transitions, 18034 flow, removed 114 selfloop flow, removed 9 redundant places. [2023-01-27 19:42:50,308 INFO L231 Difference]: Finished difference. Result has 382 places, 747 transitions, 15947 flow [2023-01-27 19:42:50,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7953, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=15947, PETRI_PLACES=382, PETRI_TRANSITIONS=747} [2023-01-27 19:42:50,310 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 361 predicate places. [2023-01-27 19:42:50,310 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 747 transitions, 15947 flow [2023-01-27 19:42:50,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 89.53333333333333) internal successors, (4029), 45 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:50,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:50,310 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:50,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:50,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:50,516 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:50,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:50,517 INFO L85 PathProgramCache]: Analyzing trace with hash -456294063, now seen corresponding path program 13 times [2023-01-27 19:42:50,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:50,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545740793] [2023-01-27 19:42:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:50,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:51,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:51,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545740793] [2023-01-27 19:42:51,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545740793] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:51,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435371434] [2023-01-27 19:42:51,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 19:42:51,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:51,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:51,115 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:51,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-27 19:42:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:51,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 19:42:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:42:51,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:51,737 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:42:51,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:42:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:42:51,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435371434] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:51,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:51,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 8] total 29 [2023-01-27 19:42:51,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622853307] [2023-01-27 19:42:51,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:51,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 19:42:51,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:51,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 19:42:51,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2023-01-27 19:42:51,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-27 19:42:51,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 747 transitions, 15947 flow. Second operand has 30 states, 30 states have (on average 104.2) internal successors, (3126), 30 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:51,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:51,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-27 19:42:51,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:42:55,299 INFO L130 PetriNetUnfolder]: 3724/6801 cut-off events. [2023-01-27 19:42:55,299 INFO L131 PetriNetUnfolder]: For 493731/493731 co-relation queries the response was YES. [2023-01-27 19:42:55,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83118 conditions, 6801 events. 3724/6801 cut-off events. For 493731/493731 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49284 event pairs, 746 based on Foata normal form. 12/6813 useless extension candidates. Maximal degree in co-relation 82962. Up to 5398 conditions per place. [2023-01-27 19:42:55,381 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 563 selfloop transitions, 248 changer transitions 27/838 dead transitions. [2023-01-27 19:42:55,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 838 transitions, 19145 flow [2023-01-27 19:42:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 19:42:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 19:42:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2164 transitions. [2023-01-27 19:42:55,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3339506172839506 [2023-01-27 19:42:55,383 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2164 transitions. [2023-01-27 19:42:55,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2164 transitions. [2023-01-27 19:42:55,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:42:55,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2164 transitions. [2023-01-27 19:42:55,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 108.2) internal successors, (2164), 20 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:55,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:55,387 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:55,388 INFO L175 Difference]: Start difference. First operand has 382 places, 747 transitions, 15947 flow. Second operand 20 states and 2164 transitions. [2023-01-27 19:42:55,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 838 transitions, 19145 flow [2023-01-27 19:42:57,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 838 transitions, 18080 flow, removed 514 selfloop flow, removed 9 redundant places. [2023-01-27 19:42:57,286 INFO L231 Difference]: Finished difference. Result has 395 places, 764 transitions, 15857 flow [2023-01-27 19:42:57,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=14886, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15857, PETRI_PLACES=395, PETRI_TRANSITIONS=764} [2023-01-27 19:42:57,287 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 374 predicate places. [2023-01-27 19:42:57,287 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 764 transitions, 15857 flow [2023-01-27 19:42:57,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 104.2) internal successors, (3126), 30 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:57,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:42:57,288 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:42:57,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-27 19:42:57,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-27 19:42:57,498 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:42:57,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:42:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1588312397, now seen corresponding path program 14 times [2023-01-27 19:42:57,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:42:57,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243511925] [2023-01-27 19:42:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:42:57,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:42:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:42:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:42:58,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:42:58,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243511925] [2023-01-27 19:42:58,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243511925] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:42:58,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14118887] [2023-01-27 19:42:58,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:42:58,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:42:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:42:58,307 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:42:58,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-27 19:42:58,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:42:58,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:42:58,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 19:42:58,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:42:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:42:58,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:42:58,945 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:42:58,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:42:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:42:59,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14118887] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:42:59,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:42:59,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 28 [2023-01-27 19:42:59,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690225532] [2023-01-27 19:42:59,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:42:59,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 19:42:59,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:42:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 19:42:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2023-01-27 19:42:59,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-27 19:42:59,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 764 transitions, 15857 flow. Second operand has 29 states, 29 states have (on average 104.10344827586206) internal successors, (3019), 29 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:42:59,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:42:59,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-27 19:42:59,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:43:02,643 INFO L130 PetriNetUnfolder]: 3704/6758 cut-off events. [2023-01-27 19:43:02,643 INFO L131 PetriNetUnfolder]: For 502908/502908 co-relation queries the response was YES. [2023-01-27 19:43:02,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82092 conditions, 6758 events. 3704/6758 cut-off events. For 502908/502908 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 48903 event pairs, 738 based on Foata normal form. 12/6770 useless extension candidates. Maximal degree in co-relation 81932. Up to 5320 conditions per place. [2023-01-27 19:43:02,728 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 556 selfloop transitions, 281 changer transitions 2/839 dead transitions. [2023-01-27 19:43:02,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 839 transitions, 19134 flow [2023-01-27 19:43:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 19:43:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 19:43:02,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2478 transitions. [2023-01-27 19:43:02,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3325281803542673 [2023-01-27 19:43:02,730 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2478 transitions. [2023-01-27 19:43:02,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2478 transitions. [2023-01-27 19:43:02,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:43:02,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2478 transitions. [2023-01-27 19:43:02,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.73913043478261) internal successors, (2478), 23 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:02,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:02,735 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:02,735 INFO L175 Difference]: Start difference. First operand has 395 places, 764 transitions, 15857 flow. Second operand 23 states and 2478 transitions. [2023-01-27 19:43:02,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 839 transitions, 19134 flow [2023-01-27 19:43:04,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 839 transitions, 18635 flow, removed 50 selfloop flow, removed 14 redundant places. [2023-01-27 19:43:04,491 INFO L231 Difference]: Finished difference. Result has 405 places, 778 transitions, 16442 flow [2023-01-27 19:43:04,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=15390, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=16442, PETRI_PLACES=405, PETRI_TRANSITIONS=778} [2023-01-27 19:43:04,493 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 384 predicate places. [2023-01-27 19:43:04,493 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 778 transitions, 16442 flow [2023-01-27 19:43:04,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 104.10344827586206) internal successors, (3019), 29 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:04,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:43:04,493 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:43:04,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-27 19:43:04,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-27 19:43:04,700 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:43:04,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:43:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash 93397669, now seen corresponding path program 15 times [2023-01-27 19:43:04,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:43:04,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215860851] [2023-01-27 19:43:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:43:04,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:43:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:43:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:43:05,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:43:05,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215860851] [2023-01-27 19:43:05,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215860851] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:43:05,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030634915] [2023-01-27 19:43:05,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:43:05,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:43:05,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:43:05,205 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:43:05,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-27 19:43:05,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 19:43:05,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:43:05,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 19:43:05,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:43:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:43:06,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:43:06,215 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:43:06,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:43:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:43:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030634915] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:43:06,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:43:06,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 37 [2023-01-27 19:43:06,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235255482] [2023-01-27 19:43:06,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:43:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-27 19:43:06,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:43:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-27 19:43:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2023-01-27 19:43:06,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 324 [2023-01-27 19:43:06,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 778 transitions, 16442 flow. Second operand has 38 states, 38 states have (on average 92.76315789473684) internal successors, (3525), 38 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:06,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:43:06,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 324 [2023-01-27 19:43:06,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:43:12,615 INFO L130 PetriNetUnfolder]: 5891/10784 cut-off events. [2023-01-27 19:43:12,615 INFO L131 PetriNetUnfolder]: For 733577/733577 co-relation queries the response was YES. [2023-01-27 19:43:12,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125061 conditions, 10784 events. 5891/10784 cut-off events. For 733577/733577 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 84302 event pairs, 1079 based on Foata normal form. 37/10821 useless extension candidates. Maximal degree in co-relation 123994. Up to 6637 conditions per place. [2023-01-27 19:43:12,758 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 833 selfloop transitions, 664 changer transitions 20/1517 dead transitions. [2023-01-27 19:43:12,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1517 transitions, 33706 flow [2023-01-27 19:43:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-27 19:43:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-27 19:43:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 5010 transitions. [2023-01-27 19:43:12,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29736467236467234 [2023-01-27 19:43:12,762 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 5010 transitions. [2023-01-27 19:43:12,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 5010 transitions. [2023-01-27 19:43:12,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:43:12,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 5010 transitions. [2023-01-27 19:43:12,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 96.34615384615384) internal successors, (5010), 52 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:12,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 324.0) internal successors, (17172), 53 states have internal predecessors, (17172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:12,774 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 324.0) internal successors, (17172), 53 states have internal predecessors, (17172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:12,774 INFO L175 Difference]: Start difference. First operand has 405 places, 778 transitions, 16442 flow. Second operand 52 states and 5010 transitions. [2023-01-27 19:43:12,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1517 transitions, 33706 flow [2023-01-27 19:43:16,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1517 transitions, 32543 flow, removed 160 selfloop flow, removed 16 redundant places. [2023-01-27 19:43:16,306 INFO L231 Difference]: Finished difference. Result has 462 places, 1330 transitions, 29586 flow [2023-01-27 19:43:16,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=15916, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=29586, PETRI_PLACES=462, PETRI_TRANSITIONS=1330} [2023-01-27 19:43:16,308 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 441 predicate places. [2023-01-27 19:43:16,308 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1330 transitions, 29586 flow [2023-01-27 19:43:16,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 92.76315789473684) internal successors, (3525), 38 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:16,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:43:16,308 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:43:16,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-27 19:43:16,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-01-27 19:43:16,521 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:43:16,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:43:16,522 INFO L85 PathProgramCache]: Analyzing trace with hash 533017294, now seen corresponding path program 28 times [2023-01-27 19:43:16,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:43:16,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479601313] [2023-01-27 19:43:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:43:16,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:43:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:43:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:43:17,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:43:17,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479601313] [2023-01-27 19:43:17,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479601313] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:43:17,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317176259] [2023-01-27 19:43:17,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:43:17,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:43:17,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:43:17,317 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:43:17,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-27 19:43:17,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:43:17,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:43:17,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-27 19:43:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:43:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:43:17,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:43:18,215 INFO L321 Elim1Store]: treesize reduction 15, result has 93.1 percent of original size [2023-01-27 19:43:18,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 232 [2023-01-27 19:43:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:43:30,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317176259] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:43:30,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:43:30,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 30 [2023-01-27 19:43:30,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389785557] [2023-01-27 19:43:30,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:43:30,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 19:43:30,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:43:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 19:43:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-01-27 19:43:30,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:43:30,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1330 transitions, 29586 flow. Second operand has 31 states, 31 states have (on average 90.16129032258064) internal successors, (2795), 31 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:30,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:43:30,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:43:30,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:43:39,222 INFO L130 PetriNetUnfolder]: 6739/12315 cut-off events. [2023-01-27 19:43:39,222 INFO L131 PetriNetUnfolder]: For 1048221/1048221 co-relation queries the response was YES. [2023-01-27 19:43:39,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148941 conditions, 12315 events. 6739/12315 cut-off events. For 1048221/1048221 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 98476 event pairs, 929 based on Foata normal form. 420/12735 useless extension candidates. Maximal degree in co-relation 148663. Up to 6377 conditions per place. [2023-01-27 19:43:39,404 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 864 selfloop transitions, 863 changer transitions 53/1780 dead transitions. [2023-01-27 19:43:39,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1780 transitions, 43417 flow [2023-01-27 19:43:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-01-27 19:43:39,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-01-27 19:43:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5068 transitions. [2023-01-27 19:43:39,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28966620941929583 [2023-01-27 19:43:39,408 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 5068 transitions. [2023-01-27 19:43:39,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 5068 transitions. [2023-01-27 19:43:39,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:43:39,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 5068 transitions. [2023-01-27 19:43:39,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 93.85185185185185) internal successors, (5068), 54 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:39,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 324.0) internal successors, (17820), 55 states have internal predecessors, (17820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:39,422 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 324.0) internal successors, (17820), 55 states have internal predecessors, (17820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:39,422 INFO L175 Difference]: Start difference. First operand has 462 places, 1330 transitions, 29586 flow. Second operand 54 states and 5068 transitions. [2023-01-27 19:43:39,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1780 transitions, 43417 flow [2023-01-27 19:43:45,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1780 transitions, 41242 flow, removed 1050 selfloop flow, removed 12 redundant places. [2023-01-27 19:43:45,079 INFO L231 Difference]: Finished difference. Result has 520 places, 1497 transitions, 35199 flow [2023-01-27 19:43:45,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=28689, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=35199, PETRI_PLACES=520, PETRI_TRANSITIONS=1497} [2023-01-27 19:43:45,081 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 499 predicate places. [2023-01-27 19:43:45,081 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 1497 transitions, 35199 flow [2023-01-27 19:43:45,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 90.16129032258064) internal successors, (2795), 31 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:45,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:43:45,081 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:43:45,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-27 19:43:45,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-01-27 19:43:45,287 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:43:45,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:43:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1305015792, now seen corresponding path program 29 times [2023-01-27 19:43:45,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:43:45,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441699559] [2023-01-27 19:43:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:43:45,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:43:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:43:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:43:46,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:43:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441699559] [2023-01-27 19:43:46,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441699559] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:43:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168024230] [2023-01-27 19:43:46,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 19:43:46,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:43:46,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:43:46,004 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:43:46,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-27 19:43:46,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 19:43:46,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:43:46,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 19:43:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:43:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:43:46,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:43:46,970 INFO L321 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-01-27 19:43:46,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 183 [2023-01-27 19:43:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:43:47,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168024230] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:43:47,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:43:47,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 31 [2023-01-27 19:43:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756977568] [2023-01-27 19:43:47,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:43:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 19:43:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:43:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 19:43:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-01-27 19:43:47,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:43:47,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 1497 transitions, 35199 flow. Second operand has 32 states, 32 states have (on average 89.96875) internal successors, (2879), 32 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:47,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:43:47,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:43:47,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:43:55,123 INFO L130 PetriNetUnfolder]: 6535/11827 cut-off events. [2023-01-27 19:43:55,123 INFO L131 PetriNetUnfolder]: For 1575580/1575580 co-relation queries the response was YES. [2023-01-27 19:43:55,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162809 conditions, 11827 events. 6535/11827 cut-off events. For 1575580/1575580 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 92799 event pairs, 1141 based on Foata normal form. 32/11859 useless extension candidates. Maximal degree in co-relation 162605. Up to 8924 conditions per place. [2023-01-27 19:43:55,315 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 917 selfloop transitions, 615 changer transitions 11/1543 dead transitions. [2023-01-27 19:43:55,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 1543 transitions, 39317 flow [2023-01-27 19:43:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 19:43:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 19:43:55,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2410 transitions. [2023-01-27 19:43:55,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28608736942070273 [2023-01-27 19:43:55,317 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2410 transitions. [2023-01-27 19:43:55,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2410 transitions. [2023-01-27 19:43:55,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:43:55,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2410 transitions. [2023-01-27 19:43:55,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 92.6923076923077) internal successors, (2410), 26 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:55,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:55,324 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:43:55,324 INFO L175 Difference]: Start difference. First operand has 520 places, 1497 transitions, 35199 flow. Second operand 26 states and 2410 transitions. [2023-01-27 19:43:55,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 1543 transitions, 39317 flow [2023-01-27 19:44:02,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 1543 transitions, 36904 flow, removed 697 selfloop flow, removed 18 redundant places. [2023-01-27 19:44:02,592 INFO L231 Difference]: Finished difference. Result has 529 places, 1489 transitions, 33917 flow [2023-01-27 19:44:02,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=32612, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=33917, PETRI_PLACES=529, PETRI_TRANSITIONS=1489} [2023-01-27 19:44:02,608 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 508 predicate places. [2023-01-27 19:44:02,608 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 1489 transitions, 33917 flow [2023-01-27 19:44:02,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.96875) internal successors, (2879), 32 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:02,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:44:02,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:44:02,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-01-27 19:44:02,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-01-27 19:44:02,815 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:44:02,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:44:02,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2133455558, now seen corresponding path program 30 times [2023-01-27 19:44:02,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:44:02,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201973685] [2023-01-27 19:44:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:44:02,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:44:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:44:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:44:03,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:44:03,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201973685] [2023-01-27 19:44:03,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201973685] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:44:03,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644150867] [2023-01-27 19:44:03,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 19:44:03,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:44:03,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:44:03,459 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:44:03,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-27 19:44:03,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 19:44:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:44:03,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 19:44:03,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:44:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:44:04,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:44:04,758 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:44:04,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:44:04,793 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:44:04,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:44:04,810 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-27 19:44:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:44:05,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644150867] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:44:05,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:44:05,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 45 [2023-01-27 19:44:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002702068] [2023-01-27 19:44:05,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:44:05,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-27 19:44:05,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:44:05,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-27 19:44:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1841, Unknown=0, NotChecked=0, Total=2070 [2023-01-27 19:44:05,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:44:05,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 1489 transitions, 33917 flow. Second operand has 46 states, 46 states have (on average 89.54347826086956) internal successors, (4119), 46 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:05,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:44:05,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:44:05,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:44:17,580 INFO L130 PetriNetUnfolder]: 7244/13187 cut-off events. [2023-01-27 19:44:17,580 INFO L131 PetriNetUnfolder]: For 2117453/2117453 co-relation queries the response was YES. [2023-01-27 19:44:17,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185395 conditions, 13187 events. 7244/13187 cut-off events. For 2117453/2117453 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 105192 event pairs, 986 based on Foata normal form. 166/13353 useless extension candidates. Maximal degree in co-relation 185190. Up to 6002 conditions per place. [2023-01-27 19:44:17,818 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 781 selfloop transitions, 1077 changer transitions 11/1869 dead transitions. [2023-01-27 19:44:17,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 1869 transitions, 46218 flow [2023-01-27 19:44:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-01-27 19:44:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-01-27 19:44:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5305 transitions. [2023-01-27 19:44:17,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28725362789690273 [2023-01-27 19:44:17,837 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5305 transitions. [2023-01-27 19:44:17,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5305 transitions. [2023-01-27 19:44:17,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:44:17,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5305 transitions. [2023-01-27 19:44:17,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 93.0701754385965) internal successors, (5305), 57 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:17,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 324.0) internal successors, (18792), 58 states have internal predecessors, (18792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:17,851 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 324.0) internal successors, (18792), 58 states have internal predecessors, (18792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:17,851 INFO L175 Difference]: Start difference. First operand has 529 places, 1489 transitions, 33917 flow. Second operand 57 states and 5305 transitions. [2023-01-27 19:44:17,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 1869 transitions, 46218 flow [2023-01-27 19:44:26,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 1869 transitions, 44352 flow, removed 98 selfloop flow, removed 28 redundant places. [2023-01-27 19:44:26,722 INFO L231 Difference]: Finished difference. Result has 561 places, 1650 transitions, 40189 flow [2023-01-27 19:44:26,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=32312, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=926, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=40189, PETRI_PLACES=561, PETRI_TRANSITIONS=1650} [2023-01-27 19:44:26,729 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 540 predicate places. [2023-01-27 19:44:26,729 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 1650 transitions, 40189 flow [2023-01-27 19:44:26,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 89.54347826086956) internal successors, (4119), 46 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:26,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:44:26,730 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:44:26,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-27 19:44:26,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-27 19:44:26,936 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:44:26,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:44:26,936 INFO L85 PathProgramCache]: Analyzing trace with hash -17367259, now seen corresponding path program 16 times [2023-01-27 19:44:26,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:44:26,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910341618] [2023-01-27 19:44:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:44:26,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:44:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:44:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:44:27,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:44:27,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910341618] [2023-01-27 19:44:27,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910341618] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:44:27,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316410845] [2023-01-27 19:44:27,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:44:27,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:44:27,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:44:27,558 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:44:27,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-27 19:44:27,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:44:27,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:44:27,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 19:44:27,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:44:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:44:27,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:44:28,078 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:44:28,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:44:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-01-27 19:44:28,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316410845] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:44:28,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:44:28,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 6] total 25 [2023-01-27 19:44:28,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699668465] [2023-01-27 19:44:28,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:44:28,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 19:44:28,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:44:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 19:44:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2023-01-27 19:44:28,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-27 19:44:28,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 1650 transitions, 40189 flow. Second operand has 26 states, 26 states have (on average 104.34615384615384) internal successors, (2713), 26 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:28,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:44:28,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-27 19:44:28,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:44:37,659 INFO L130 PetriNetUnfolder]: 7339/13380 cut-off events. [2023-01-27 19:44:37,660 INFO L131 PetriNetUnfolder]: For 2381422/2381422 co-relation queries the response was YES. [2023-01-27 19:44:37,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202340 conditions, 13380 events. 7339/13380 cut-off events. For 2381422/2381422 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 106896 event pairs, 1331 based on Foata normal form. 32/13412 useless extension candidates. Maximal degree in co-relation 202127. Up to 10144 conditions per place. [2023-01-27 19:44:37,901 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 1134 selfloop transitions, 584 changer transitions 23/1741 dead transitions. [2023-01-27 19:44:37,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 1741 transitions, 45782 flow [2023-01-27 19:44:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 19:44:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 19:44:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2394 transitions. [2023-01-27 19:44:37,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33585858585858586 [2023-01-27 19:44:37,904 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2394 transitions. [2023-01-27 19:44:37,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2394 transitions. [2023-01-27 19:44:37,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:44:37,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2394 transitions. [2023-01-27 19:44:37,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 108.81818181818181) internal successors, (2394), 22 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:37,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:37,911 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:37,911 INFO L175 Difference]: Start difference. First operand has 561 places, 1650 transitions, 40189 flow. Second operand 22 states and 2394 transitions. [2023-01-27 19:44:37,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 1741 transitions, 45782 flow [2023-01-27 19:44:47,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1741 transitions, 44203 flow, removed 569 selfloop flow, removed 29 redundant places. [2023-01-27 19:44:47,126 INFO L231 Difference]: Finished difference. Result has 556 places, 1660 transitions, 40151 flow [2023-01-27 19:44:47,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=38433, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=40151, PETRI_PLACES=556, PETRI_TRANSITIONS=1660} [2023-01-27 19:44:47,127 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 535 predicate places. [2023-01-27 19:44:47,156 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 1660 transitions, 40151 flow [2023-01-27 19:44:47,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.34615384615384) internal successors, (2713), 26 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:47,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:44:47,156 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:44:47,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-27 19:44:47,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:44:47,362 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:44:47,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:44:47,363 INFO L85 PathProgramCache]: Analyzing trace with hash -953429951, now seen corresponding path program 17 times [2023-01-27 19:44:47,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:44:47,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723045361] [2023-01-27 19:44:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:44:47,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:44:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:44:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:44:47,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:44:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723045361] [2023-01-27 19:44:47,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723045361] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:44:47,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311756732] [2023-01-27 19:44:47,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 19:44:47,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:44:47,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:44:47,969 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:44:48,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-27 19:44:48,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 19:44:48,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:44:48,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 19:44:48,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:44:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:44:48,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:44:48,728 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:44:48,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:44:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-01-27 19:44:48,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311756732] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:44:48,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:44:48,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 7] total 23 [2023-01-27 19:44:48,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429301924] [2023-01-27 19:44:48,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:44:48,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 19:44:48,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:44:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 19:44:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-01-27 19:44:48,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-27 19:44:48,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 1660 transitions, 40151 flow. Second operand has 24 states, 24 states have (on average 104.08333333333333) internal successors, (2498), 24 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:48,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:44:48,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-27 19:44:48,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:44:58,370 INFO L130 PetriNetUnfolder]: 7382/13476 cut-off events. [2023-01-27 19:44:58,376 INFO L131 PetriNetUnfolder]: For 2378403/2378403 co-relation queries the response was YES. [2023-01-27 19:44:58,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202648 conditions, 13476 events. 7382/13476 cut-off events. For 2378403/2378403 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 108121 event pairs, 1334 based on Foata normal form. 36/13512 useless extension candidates. Maximal degree in co-relation 202432. Up to 10142 conditions per place. [2023-01-27 19:44:58,664 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 1100 selfloop transitions, 651 changer transitions 21/1772 dead transitions. [2023-01-27 19:44:58,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1772 transitions, 46785 flow [2023-01-27 19:44:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 19:44:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 19:44:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2596 transitions. [2023-01-27 19:44:58,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3338477366255144 [2023-01-27 19:44:58,685 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2596 transitions. [2023-01-27 19:44:58,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2596 transitions. [2023-01-27 19:44:58,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:44:58,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2596 transitions. [2023-01-27 19:44:58,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 108.16666666666667) internal successors, (2596), 24 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:58,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 324.0) internal successors, (8100), 25 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:58,691 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 324.0) internal successors, (8100), 25 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:44:58,692 INFO L175 Difference]: Start difference. First operand has 556 places, 1660 transitions, 40151 flow. Second operand 24 states and 2596 transitions. [2023-01-27 19:44:58,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1772 transitions, 46785 flow [2023-01-27 19:45:08,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 1772 transitions, 45413 flow, removed 76 selfloop flow, removed 13 redundant places. [2023-01-27 19:45:08,114 INFO L231 Difference]: Finished difference. Result has 566 places, 1698 transitions, 41621 flow [2023-01-27 19:45:08,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=38867, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=613, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=41621, PETRI_PLACES=566, PETRI_TRANSITIONS=1698} [2023-01-27 19:45:08,116 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 545 predicate places. [2023-01-27 19:45:08,116 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1698 transitions, 41621 flow [2023-01-27 19:45:08,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 104.08333333333333) internal successors, (2498), 24 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:08,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:45:08,117 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:45:08,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-27 19:45:08,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:45:08,323 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:45:08,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:45:08,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2023043557, now seen corresponding path program 18 times [2023-01-27 19:45:08,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:45:08,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934525270] [2023-01-27 19:45:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:45:08,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:45:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:45:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:45:08,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:45:08,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934525270] [2023-01-27 19:45:08,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934525270] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:45:08,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063601317] [2023-01-27 19:45:08,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 19:45:08,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:45:08,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:45:08,829 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:45:08,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-27 19:45:09,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 19:45:09,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:45:09,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 19:45:09,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:45:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:45:09,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:45:09,386 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:45:09,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:45:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:45:09,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063601317] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:45:09,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:45:09,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 6] total 22 [2023-01-27 19:45:09,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804734671] [2023-01-27 19:45:09,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:45:09,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 19:45:09,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:45:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 19:45:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-01-27 19:45:09,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-27 19:45:09,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1698 transitions, 41621 flow. Second operand has 23 states, 23 states have (on average 104.26086956521739) internal successors, (2398), 23 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:09,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:45:09,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-27 19:45:09,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:45:19,342 INFO L130 PetriNetUnfolder]: 7456/13545 cut-off events. [2023-01-27 19:45:19,342 INFO L131 PetriNetUnfolder]: For 2390190/2390190 co-relation queries the response was YES. [2023-01-27 19:45:19,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204459 conditions, 13545 events. 7456/13545 cut-off events. For 2390190/2390190 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 108070 event pairs, 1091 based on Foata normal form. 36/13581 useless extension candidates. Maximal degree in co-relation 204240. Up to 9640 conditions per place. [2023-01-27 19:45:19,626 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 1159 selfloop transitions, 660 changer transitions 3/1822 dead transitions. [2023-01-27 19:45:19,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 1822 transitions, 48730 flow [2023-01-27 19:45:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 19:45:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 19:45:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2403 transitions. [2023-01-27 19:45:19,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3371212121212121 [2023-01-27 19:45:19,628 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2403 transitions. [2023-01-27 19:45:19,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2403 transitions. [2023-01-27 19:45:19,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:45:19,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2403 transitions. [2023-01-27 19:45:19,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 109.22727272727273) internal successors, (2403), 22 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:19,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:19,633 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:19,633 INFO L175 Difference]: Start difference. First operand has 566 places, 1698 transitions, 41621 flow. Second operand 22 states and 2403 transitions. [2023-01-27 19:45:19,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 1822 transitions, 48730 flow [2023-01-27 19:45:30,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1822 transitions, 47988 flow, removed 19 selfloop flow, removed 14 redundant places. [2023-01-27 19:45:30,301 INFO L231 Difference]: Finished difference. Result has 574 places, 1710 transitions, 42621 flow [2023-01-27 19:45:30,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=40881, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=651, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1043, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=42621, PETRI_PLACES=574, PETRI_TRANSITIONS=1710} [2023-01-27 19:45:30,303 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 553 predicate places. [2023-01-27 19:45:30,303 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 1710 transitions, 42621 flow [2023-01-27 19:45:30,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 104.26086956521739) internal successors, (2398), 23 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:30,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:45:30,303 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:45:30,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-27 19:45:30,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:45:30,510 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:45:30,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:45:30,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1268350612, now seen corresponding path program 31 times [2023-01-27 19:45:30,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:45:30,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113320454] [2023-01-27 19:45:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:45:30,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:45:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:45:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:45:31,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:45:31,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113320454] [2023-01-27 19:45:31,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113320454] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:45:31,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582591182] [2023-01-27 19:45:31,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 19:45:31,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:45:31,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:45:31,373 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:45:31,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-27 19:45:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:45:31,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-27 19:45:31,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:45:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:45:32,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:45:32,301 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:45:32,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:45:32,338 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:45:32,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:45:32,356 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 19:45:32,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 19:45:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:45:32,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582591182] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:45:32,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:45:32,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2023-01-27 19:45:32,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274629628] [2023-01-27 19:45:32,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:45:32,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-27 19:45:32,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:45:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-27 19:45:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2023-01-27 19:45:32,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:45:32,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 1710 transitions, 42621 flow. Second operand has 44 states, 44 states have (on average 89.6590909090909) internal successors, (3945), 44 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:32,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:45:32,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:45:32,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:45:43,307 INFO L130 PetriNetUnfolder]: 7536/13697 cut-off events. [2023-01-27 19:45:43,307 INFO L131 PetriNetUnfolder]: For 2555219/2555219 co-relation queries the response was YES. [2023-01-27 19:45:43,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208970 conditions, 13697 events. 7536/13697 cut-off events. For 2555219/2555219 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 109495 event pairs, 1583 based on Foata normal form. 72/13769 useless extension candidates. Maximal degree in co-relation 208750. Up to 12496 conditions per place. [2023-01-27 19:45:43,577 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 1438 selfloop transitions, 347 changer transitions 6/1791 dead transitions. [2023-01-27 19:45:43,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 1791 transitions, 47910 flow [2023-01-27 19:45:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 19:45:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 19:45:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2218 transitions. [2023-01-27 19:45:43,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2852366255144033 [2023-01-27 19:45:43,579 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2218 transitions. [2023-01-27 19:45:43,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2218 transitions. [2023-01-27 19:45:43,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:45:43,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2218 transitions. [2023-01-27 19:45:43,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.41666666666667) internal successors, (2218), 24 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:43,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 324.0) internal successors, (8100), 25 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:43,584 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 324.0) internal successors, (8100), 25 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:43,584 INFO L175 Difference]: Start difference. First operand has 574 places, 1710 transitions, 42621 flow. Second operand 24 states and 2218 transitions. [2023-01-27 19:45:43,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 1791 transitions, 47910 flow [2023-01-27 19:45:54,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 1791 transitions, 45925 flow, removed 30 selfloop flow, removed 18 redundant places. [2023-01-27 19:45:54,601 INFO L231 Difference]: Finished difference. Result has 580 places, 1723 transitions, 41873 flow [2023-01-27 19:45:54,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=40700, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=41873, PETRI_PLACES=580, PETRI_TRANSITIONS=1723} [2023-01-27 19:45:54,618 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 559 predicate places. [2023-01-27 19:45:54,618 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1723 transitions, 41873 flow [2023-01-27 19:45:54,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 89.6590909090909) internal successors, (3945), 44 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:54,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:45:54,619 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:45:54,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-27 19:45:54,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-01-27 19:45:54,825 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:45:54,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:45:54,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1673633428, now seen corresponding path program 32 times [2023-01-27 19:45:54,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:45:54,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427223915] [2023-01-27 19:45:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:45:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:45:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:45:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:45:55,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:45:55,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427223915] [2023-01-27 19:45:55,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427223915] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:45:55,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664816532] [2023-01-27 19:45:55,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:45:55,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:45:55,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:45:55,578 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:45:55,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-27 19:45:55,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:45:55,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:45:55,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 19:45:55,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:45:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:45:56,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:45:56,403 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 19:45:56,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 80 [2023-01-27 19:45:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:45:56,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664816532] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:45:56,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:45:56,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2023-01-27 19:45:56,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553518398] [2023-01-27 19:45:56,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:45:56,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-27 19:45:56,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:45:56,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-27 19:45:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1751, Unknown=0, NotChecked=0, Total=1980 [2023-01-27 19:45:56,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:45:56,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1723 transitions, 41873 flow. Second operand has 45 states, 45 states have (on average 89.57777777777778) internal successors, (4031), 45 states have internal predecessors, (4031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:45:56,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:45:56,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:45:56,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:46:06,364 INFO L130 PetriNetUnfolder]: 7532/13693 cut-off events. [2023-01-27 19:46:06,364 INFO L131 PetriNetUnfolder]: For 2456633/2456633 co-relation queries the response was YES. [2023-01-27 19:46:06,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207760 conditions, 13693 events. 7532/13693 cut-off events. For 2456633/2456633 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 109714 event pairs, 1610 based on Foata normal form. 4/13697 useless extension candidates. Maximal degree in co-relation 207542. Up to 12802 conditions per place. [2023-01-27 19:46:06,625 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 1494 selfloop transitions, 251 changer transitions 6/1751 dead transitions. [2023-01-27 19:46:06,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 1751 transitions, 45987 flow [2023-01-27 19:46:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 19:46:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 19:46:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1658 transitions. [2023-01-27 19:46:06,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2842935528120713 [2023-01-27 19:46:06,627 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1658 transitions. [2023-01-27 19:46:06,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1658 transitions. [2023-01-27 19:46:06,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:46:06,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1658 transitions. [2023-01-27 19:46:06,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 92.11111111111111) internal successors, (1658), 18 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:46:06,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:46:06,631 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 324.0) internal successors, (6156), 19 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:46:06,632 INFO L175 Difference]: Start difference. First operand has 580 places, 1723 transitions, 41873 flow. Second operand 18 states and 1658 transitions. [2023-01-27 19:46:06,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 1751 transitions, 45987 flow [2023-01-27 19:46:16,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1751 transitions, 45290 flow, removed 101 selfloop flow, removed 19 redundant places. [2023-01-27 19:46:16,586 INFO L231 Difference]: Finished difference. Result has 580 places, 1726 transitions, 41903 flow [2023-01-27 19:46:16,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=41176, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=41903, PETRI_PLACES=580, PETRI_TRANSITIONS=1726} [2023-01-27 19:46:16,588 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 559 predicate places. [2023-01-27 19:46:16,588 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1726 transitions, 41903 flow [2023-01-27 19:46:16,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 89.57777777777778) internal successors, (4031), 45 states have internal predecessors, (4031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:46:16,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:46:16,589 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:46:16,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-27 19:46:16,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-01-27 19:46:16,795 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:46:16,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:46:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2022690630, now seen corresponding path program 33 times [2023-01-27 19:46:16,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:46:16,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379052408] [2023-01-27 19:46:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:46:16,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:46:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:46:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:46:17,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:46:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379052408] [2023-01-27 19:46:17,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379052408] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:46:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560382942] [2023-01-27 19:46:17,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:46:17,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:46:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:46:17,851 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:46:17,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-27 19:46:18,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-01-27 19:46:18,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:46:18,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 53 conjunts are in the unsatisfiable core [2023-01-27 19:46:18,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:46:18,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-01-27 19:46:18,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:46:18,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 19:46:18,930 INFO L321 Elim1Store]: treesize reduction 27, result has 64.9 percent of original size [2023-01-27 19:46:18,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 57 [2023-01-27 19:46:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:46:19,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:46:30,595 WARN L222 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 19:46:35,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-01-27 19:46:35,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 854 treesize of output 738 [2023-01-27 19:46:35,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 271 [2023-01-27 19:46:35,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 223 [2023-01-27 19:46:35,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-01-27 19:46:35,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 422 treesize of output 370 [2023-01-27 19:46:35,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 319 [2023-01-27 19:46:35,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 223 [2023-01-27 19:46:35,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2023-01-27 19:46:35,549 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:46:35,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1740 treesize of output 1520 [2023-01-27 19:46:35,781 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:46:35,782 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:46:35,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 724 treesize of output 670 [2023-01-27 19:46:35,819 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:46:35,819 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 19:46:35,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 19:46:35,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 620 treesize of output 462 [2023-01-27 19:46:38,051 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-01-27 19:46:38,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 1 [2023-01-27 19:46:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:46:40,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560382942] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:46:40,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:46:40,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-01-27 19:46:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132347196] [2023-01-27 19:46:40,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:46:40,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-01-27 19:46:40,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:46:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-01-27 19:46:40,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1932, Unknown=6, NotChecked=0, Total=2162 [2023-01-27 19:46:40,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 324 [2023-01-27 19:46:40,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1726 transitions, 41903 flow. Second operand has 47 states, 47 states have (on average 81.46808510638297) internal successors, (3829), 47 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:46:40,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:46:40,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 324 [2023-01-27 19:46:40,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:47:02,669 INFO L130 PetriNetUnfolder]: 11026/20179 cut-off events. [2023-01-27 19:47:02,669 INFO L131 PetriNetUnfolder]: For 4304778/4304778 co-relation queries the response was YES. [2023-01-27 19:47:03,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318897 conditions, 20179 events. 11026/20179 cut-off events. For 4304778/4304778 co-relation queries the response was YES. Maximal size of possible extension queue 1197. Compared 174482 event pairs, 872 based on Foata normal form. 166/20345 useless extension candidates. Maximal degree in co-relation 318677. Up to 5387 conditions per place. [2023-01-27 19:47:03,429 INFO L137 encePairwiseOnDemand]: 311/324 looper letters, 970 selfloop transitions, 1932 changer transitions 18/2920 dead transitions. [2023-01-27 19:47:03,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 2920 transitions, 75811 flow [2023-01-27 19:47:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-01-27 19:47:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-01-27 19:47:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 7116 transitions. [2023-01-27 19:47:03,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2646140116019634 [2023-01-27 19:47:03,434 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 7116 transitions. [2023-01-27 19:47:03,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 7116 transitions. [2023-01-27 19:47:03,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:47:03,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 7116 transitions. [2023-01-27 19:47:03,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 85.73493975903614) internal successors, (7116), 83 states have internal predecessors, (7116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:47:03,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 324.0) internal successors, (27216), 84 states have internal predecessors, (27216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:47:03,455 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 324.0) internal successors, (27216), 84 states have internal predecessors, (27216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:47:03,456 INFO L175 Difference]: Start difference. First operand has 580 places, 1726 transitions, 41903 flow. Second operand 83 states and 7116 transitions. [2023-01-27 19:47:03,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 2920 transitions, 75811 flow [2023-01-27 19:47:21,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 2920 transitions, 75023 flow, removed 156 selfloop flow, removed 14 redundant places. [2023-01-27 19:47:21,233 INFO L231 Difference]: Finished difference. Result has 675 places, 2549 transitions, 68919 flow [2023-01-27 19:47:21,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=41309, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=68919, PETRI_PLACES=675, PETRI_TRANSITIONS=2549} [2023-01-27 19:47:21,235 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 654 predicate places. [2023-01-27 19:47:21,235 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 2549 transitions, 68919 flow [2023-01-27 19:47:21,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 81.46808510638297) internal successors, (3829), 47 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:47:21,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:47:21,236 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:47:21,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-01-27 19:47:21,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:47:21,442 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:47:21,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:47:21,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1100132187, now seen corresponding path program 19 times [2023-01-27 19:47:21,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:47:21,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207277571] [2023-01-27 19:47:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:47:21,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:47:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:47:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:47:21,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:47:21,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207277571] [2023-01-27 19:47:21,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207277571] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:47:21,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462913894] [2023-01-27 19:47:21,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 19:47:21,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:47:21,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:47:21,897 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:47:21,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-27 19:47:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:47:22,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 19:47:22,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:47:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:47:22,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:47:22,391 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-01-27 19:47:22,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-01-27 19:47:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:47:22,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462913894] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:47:22,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:47:22,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 7] total 27 [2023-01-27 19:47:22,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386001588] [2023-01-27 19:47:22,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:47:22,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 19:47:22,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:47:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 19:47:22,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2023-01-27 19:47:22,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-27 19:47:22,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 2549 transitions, 68919 flow. Second operand has 28 states, 28 states have (on average 104.17857142857143) internal successors, (2917), 28 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:47:22,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:47:22,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-27 19:47:22,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:47:48,068 INFO L130 PetriNetUnfolder]: 11477/20946 cut-off events. [2023-01-27 19:47:48,069 INFO L131 PetriNetUnfolder]: For 5741795/5741795 co-relation queries the response was YES. [2023-01-27 19:47:49,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372912 conditions, 20946 events. 11477/20946 cut-off events. For 5741795/5741795 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 181246 event pairs, 1844 based on Foata normal form. 121/21067 useless extension candidates. Maximal degree in co-relation 372664. Up to 15793 conditions per place. [2023-01-27 19:47:49,500 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 2106 selfloop transitions, 698 changer transitions 5/2809 dead transitions. [2023-01-27 19:47:49,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 2809 transitions, 83772 flow [2023-01-27 19:47:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 19:47:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 19:47:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3347 transitions. [2023-01-27 19:47:49,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3332337714058144 [2023-01-27 19:47:49,503 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3347 transitions. [2023-01-27 19:47:49,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3347 transitions. [2023-01-27 19:47:49,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:47:49,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3347 transitions. [2023-01-27 19:47:49,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 107.96774193548387) internal successors, (3347), 31 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:47:49,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:47:49,510 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:47:49,510 INFO L175 Difference]: Start difference. First operand has 675 places, 2549 transitions, 68919 flow. Second operand 31 states and 3347 transitions. [2023-01-27 19:47:49,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 2809 transitions, 83772 flow [2023-01-27 19:48:26,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 2809 transitions, 78962 flow, removed 2048 selfloop flow, removed 34 redundant places. [2023-01-27 19:48:27,010 INFO L231 Difference]: Finished difference. Result has 684 places, 2628 transitions, 69720 flow [2023-01-27 19:48:27,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=65307, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1894, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=69720, PETRI_PLACES=684, PETRI_TRANSITIONS=2628} [2023-01-27 19:48:27,012 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 663 predicate places. [2023-01-27 19:48:27,012 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 2628 transitions, 69720 flow [2023-01-27 19:48:27,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 104.17857142857143) internal successors, (2917), 28 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:48:27,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:48:27,013 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:48:27,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-01-27 19:48:27,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:48:27,221 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:48:27,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:48:27,221 INFO L85 PathProgramCache]: Analyzing trace with hash 227044638, now seen corresponding path program 34 times [2023-01-27 19:48:27,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:48:27,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426739833] [2023-01-27 19:48:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:48:27,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:48:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:48:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:48:27,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:48:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426739833] [2023-01-27 19:48:27,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426739833] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:48:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456409963] [2023-01-27 19:48:27,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 19:48:27,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:48:27,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:48:27,821 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:48:27,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-27 19:48:28,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 19:48:28,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:48:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 19:48:28,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:48:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:48:28,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:48:28,499 INFO L321 Elim1Store]: treesize reduction 26, result has 68.7 percent of original size [2023-01-27 19:48:28,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 71 [2023-01-27 19:48:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:48:28,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456409963] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:48:28,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:48:28,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 7] total 31 [2023-01-27 19:48:28,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541864254] [2023-01-27 19:48:28,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:48:28,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 19:48:28,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:48:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 19:48:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2023-01-27 19:48:28,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 324 [2023-01-27 19:48:28,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 2628 transitions, 69720 flow. Second operand has 32 states, 32 states have (on average 89.96875) internal successors, (2879), 32 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:48:28,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:48:28,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 324 [2023-01-27 19:48:28,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:48:52,008 INFO L130 PetriNetUnfolder]: 11451/20937 cut-off events. [2023-01-27 19:48:52,009 INFO L131 PetriNetUnfolder]: For 5685114/5685114 co-relation queries the response was YES. [2023-01-27 19:48:52,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369131 conditions, 20937 events. 11451/20937 cut-off events. For 5685114/5685114 co-relation queries the response was YES. Maximal size of possible extension queue 1255. Compared 181655 event pairs, 1612 based on Foata normal form. 52/20989 useless extension candidates. Maximal degree in co-relation 368875. Up to 13864 conditions per place. [2023-01-27 19:48:52,628 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 2394 selfloop transitions, 555 changer transitions 125/3074 dead transitions. [2023-01-27 19:48:52,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 711 places, 3074 transitions, 87393 flow [2023-01-27 19:48:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 19:48:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 19:48:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2602 transitions. [2023-01-27 19:48:52,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28681657848324515 [2023-01-27 19:48:52,631 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2602 transitions. [2023-01-27 19:48:52,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2602 transitions. [2023-01-27 19:48:52,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:48:52,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2602 transitions. [2023-01-27 19:48:52,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 92.92857142857143) internal successors, (2602), 28 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:48:52,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 324.0) internal successors, (9396), 29 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:48:52,637 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 324.0) internal successors, (9396), 29 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:48:52,637 INFO L175 Difference]: Start difference. First operand has 684 places, 2628 transitions, 69720 flow. Second operand 28 states and 2602 transitions. [2023-01-27 19:48:52,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 711 places, 3074 transitions, 87393 flow [2023-01-27 19:49:26,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 3074 transitions, 86139 flow, removed 341 selfloop flow, removed 14 redundant places. [2023-01-27 19:49:26,608 INFO L231 Difference]: Finished difference. Result has 704 places, 2644 transitions, 71062 flow [2023-01-27 19:49:26,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=68716, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2097, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=71062, PETRI_PLACES=704, PETRI_TRANSITIONS=2644} [2023-01-27 19:49:26,610 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 683 predicate places. [2023-01-27 19:49:26,610 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 2644 transitions, 71062 flow [2023-01-27 19:49:26,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 89.96875) internal successors, (2879), 32 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:26,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:49:26,610 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:49:26,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-01-27 19:49:26,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-01-27 19:49:26,816 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:49:26,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:49:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash 217840293, now seen corresponding path program 20 times [2023-01-27 19:49:26,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:49:26,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113688182] [2023-01-27 19:49:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:26,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:49:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:49:27,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:49:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113688182] [2023-01-27 19:49:27,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113688182] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:49:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390391781] [2023-01-27 19:49:27,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:49:27,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:49:27,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:49:27,179 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:49:27,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-27 19:49:27,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:49:27,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:49:27,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 19:49:27,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:49:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-01-27 19:49:27,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:49:27,686 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:49:27,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:49:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-01-27 19:49:27,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390391781] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:49:27,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:49:27,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 6] total 24 [2023-01-27 19:49:27,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058941411] [2023-01-27 19:49:27,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:49:27,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 19:49:27,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:49:27,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 19:49:27,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-01-27 19:49:27,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-27 19:49:27,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 2644 transitions, 71062 flow. Second operand has 25 states, 25 states have (on average 104.52) internal successors, (2613), 25 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:27,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:49:27,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-27 19:49:27,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:49:49,287 INFO L130 PetriNetUnfolder]: 11131/20404 cut-off events. [2023-01-27 19:49:49,287 INFO L131 PetriNetUnfolder]: For 5872954/5872954 co-relation queries the response was YES. [2023-01-27 19:49:49,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366705 conditions, 20404 events. 11131/20404 cut-off events. For 5872954/5872954 co-relation queries the response was YES. Maximal size of possible extension queue 1252. Compared 176589 event pairs, 2232 based on Foata normal form. 60/20464 useless extension candidates. Maximal degree in co-relation 366443. Up to 17878 conditions per place. [2023-01-27 19:49:49,834 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 2146 selfloop transitions, 550 changer transitions 26/2722 dead transitions. [2023-01-27 19:49:49,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 2722 transitions, 79408 flow [2023-01-27 19:49:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 19:49:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 19:49:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2481 transitions. [2023-01-27 19:49:49,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3329307568438003 [2023-01-27 19:49:49,836 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2481 transitions. [2023-01-27 19:49:49,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2481 transitions. [2023-01-27 19:49:49,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:49:49,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2481 transitions. [2023-01-27 19:49:49,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.8695652173913) internal successors, (2481), 23 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:49,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:49,841 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:49,841 INFO L175 Difference]: Start difference. First operand has 704 places, 2644 transitions, 71062 flow. Second operand 23 states and 2481 transitions. [2023-01-27 19:49:49,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 2722 transitions, 79408 flow [2023-01-27 19:50:27,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 2722 transitions, 76973 flow, removed 956 selfloop flow, removed 18 redundant places. [2023-01-27 19:50:27,113 INFO L231 Difference]: Finished difference. Result has 707 places, 2638 transitions, 70930 flow [2023-01-27 19:50:27,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=69434, PETRI_DIFFERENCE_MINUEND_PLACES=681, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2086, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=70930, PETRI_PLACES=707, PETRI_TRANSITIONS=2638} [2023-01-27 19:50:27,115 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 686 predicate places. [2023-01-27 19:50:27,115 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 2638 transitions, 70930 flow [2023-01-27 19:50:27,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 104.52) internal successors, (2613), 25 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:50:27,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:50:27,116 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:50:27,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-01-27 19:50:27,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-01-27 19:50:27,322 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:50:27,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:50:27,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1572075405, now seen corresponding path program 21 times [2023-01-27 19:50:27,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:50:27,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834073330] [2023-01-27 19:50:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:50:27,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:50:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:50:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 19:50:27,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:50:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834073330] [2023-01-27 19:50:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834073330] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:50:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921727116] [2023-01-27 19:50:27,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 19:50:27,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:50:27,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:50:27,681 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:50:27,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-01-27 19:50:28,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 19:50:28,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:50:28,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 19:50:28,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:50:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-27 19:50:28,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:50:28,364 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 19:50:28,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 19:50:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-01-27 19:50:28,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921727116] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:50:28,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:50:28,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 6] total 23 [2023-01-27 19:50:28,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588802156] [2023-01-27 19:50:28,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:50:28,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 19:50:28,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:50:28,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 19:50:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-01-27 19:50:28,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 324 [2023-01-27 19:50:28,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 2638 transitions, 70930 flow. Second operand has 24 states, 24 states have (on average 104.20833333333333) internal successors, (2501), 24 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:50:28,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:50:28,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 324 [2023-01-27 19:50:28,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:50:48,070 INFO L130 PetriNetUnfolder]: 11009/20099 cut-off events. [2023-01-27 19:50:48,072 INFO L131 PetriNetUnfolder]: For 5293259/5293259 co-relation queries the response was YES. [2023-01-27 19:50:48,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344619 conditions, 20099 events. 11009/20099 cut-off events. For 5293259/5293259 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 172423 event pairs, 2150 based on Foata normal form. 56/20155 useless extension candidates. Maximal degree in co-relation 344355. Up to 17588 conditions per place. [2023-01-27 19:50:48,617 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 2130 selfloop transitions, 592 changer transitions 7/2729 dead transitions. [2023-01-27 19:50:48,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 2729 transitions, 78816 flow [2023-01-27 19:50:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 19:50:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 19:50:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2896 transitions. [2023-01-27 19:50:48,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3310470964791952 [2023-01-27 19:50:48,620 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2896 transitions. [2023-01-27 19:50:48,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2896 transitions. [2023-01-27 19:50:48,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:50:48,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2896 transitions. [2023-01-27 19:50:48,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 107.25925925925925) internal successors, (2896), 27 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:50:48,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:50:48,628 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:50:48,628 INFO L175 Difference]: Start difference. First operand has 707 places, 2638 transitions, 70930 flow. Second operand 27 states and 2896 transitions. [2023-01-27 19:50:48,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 2729 transitions, 78816 flow Received shutdown request... [2023-01-27 19:51:07,772 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 19:51:07,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-01-27 19:51:07,794 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 19:51:07,794 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 19:51:07,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:51:07,985 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-27 19:51:07,989 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 19:51:07,989 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 19:51:07,990 INFO L445 BasicCegarLoop]: Path program histogram: [34, 21, 5, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:51:07,995 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 19:51:07,995 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 19:51:07,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 07:51:07 BasicIcfg [2023-01-27 19:51:07,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 19:51:07,997 INFO L158 Benchmark]: Toolchain (without parser) took 898799.43ms. Allocated memory was 406.8MB in the beginning and 14.1GB in the end (delta: 13.7GB). Free memory was 356.4MB in the beginning and 10.1GB in the end (delta: -9.7GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. [2023-01-27 19:51:07,997 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 308.3MB. Free memory was 255.9MB in the beginning and 255.8MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 19:51:07,997 INFO L158 Benchmark]: CACSL2BoogieTranslator took 377.96ms. Allocated memory is still 406.8MB. Free memory was 356.4MB in the beginning and 345.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 19:51:07,997 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.20ms. Allocated memory is still 406.8MB. Free memory was 345.2MB in the beginning and 343.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 19:51:07,997 INFO L158 Benchmark]: Boogie Preprocessor took 57.10ms. Allocated memory is still 406.8MB. Free memory was 343.2MB in the beginning and 341.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 19:51:07,997 INFO L158 Benchmark]: RCFGBuilder took 593.42ms. Allocated memory is still 406.8MB. Free memory was 341.8MB in the beginning and 324.7MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-01-27 19:51:07,997 INFO L158 Benchmark]: TraceAbstraction took 897705.22ms. Allocated memory was 406.8MB in the beginning and 14.1GB in the end (delta: 13.7GB). Free memory was 324.0MB in the beginning and 10.1GB in the end (delta: -9.8GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. [2023-01-27 19:51:07,998 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 308.3MB. Free memory was 255.9MB in the beginning and 255.8MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 377.96ms. Allocated memory is still 406.8MB. Free memory was 356.4MB in the beginning and 345.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 51.20ms. Allocated memory is still 406.8MB. Free memory was 345.2MB in the beginning and 343.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 57.10ms. Allocated memory is still 406.8MB. Free memory was 343.2MB in the beginning and 341.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 593.42ms. Allocated memory is still 406.8MB. Free memory was 341.8MB in the beginning and 324.7MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 897705.22ms. Allocated memory was 406.8MB in the beginning and 14.1GB in the end (delta: 13.7GB). Free memory was 324.0MB in the beginning and 10.1GB in the end (delta: -9.8GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.9s, 145 PlacesBefore, 21 PlacesAfterwards, 153 TransitionsBefore, 19 TransitionsAfterwards, 992 CoEnabledTransitionPairs, 7 FixpointIterations, 94 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 8 ConcurrentYvCompositions, 10 ChoiceCompositions, 161 TotalNumberOfCompositions, 1281 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1142, independent: 1103, independent conditional: 0, independent unconditional: 1103, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 576, independent: 565, independent conditional: 0, independent unconditional: 565, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1142, independent: 538, independent conditional: 0, independent unconditional: 538, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 576, unknown conditional: 0, unknown unconditional: 576] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 179 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 897.5s, OverallIterations: 70, TraceHistogramMax: 3, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.0s, AutomataDifference: 568.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.1s, HoareTripleCheckerStatistics: 434 mSolverCounterUnknown, 8565 SdHoareTripleChecker+Valid, 53.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8565 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 48.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 563 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 840 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51095 IncrementalHoareTripleChecker+Invalid, 52932 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 840 mSolverCounterUnsat, 0 mSDtfsCounter, 51095 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4247 GetRequests, 1959 SyntacticMatches, 36 SemanticMatches, 2252 ConstructedPredicates, 8 IntricatePredicates, 2 DeprecatedPredicates, 19639 ImplicationChecksByTransitivity, 119.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71062occurred in iteration=68, InterpolantAutomatonStates: 1284, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 294.2s InterpolantComputationTime, 2990 NumberOfCodeBlocks, 2988 NumberOfCodeBlocksAsserted, 215 NumberOfCheckSat, 4242 ConstructedInterpolants, 154 QuantifiedInterpolants, 54423 SizeOfPredicates, 641 NumberOfNonLiveVariables, 15089 ConjunctsInSsa, 1697 ConjunctsInUnsatCore, 198 InterpolantComputations, 10 PerfectInterpolantSequences, 1220/2622 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown