/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/chl-name-comparator-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 20:14:12,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 20:14:12,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 20:14:12,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 20:14:12,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 20:14:12,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 20:14:12,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 20:14:12,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 20:14:12,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 20:14:12,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 20:14:12,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 20:14:12,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 20:14:12,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 20:14:12,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 20:14:12,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 20:14:12,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 20:14:12,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 20:14:12,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 20:14:12,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 20:14:12,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 20:14:12,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 20:14:12,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 20:14:12,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 20:14:12,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 20:14:12,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 20:14:12,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 20:14:12,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 20:14:12,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 20:14:12,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 20:14:12,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 20:14:12,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 20:14:12,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 20:14:12,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 20:14:12,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 20:14:12,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 20:14:12,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 20:14:12,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 20:14:12,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 20:14:12,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 20:14:12,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 20:14:12,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 20:14:12,200 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 20:14:12,230 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 20:14:12,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 20:14:12,231 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 20:14:12,231 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 20:14:12,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 20:14:12,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 20:14:12,232 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 20:14:12,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 20:14:12,232 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 20:14:12,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 20:14:12,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 20:14:12,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 20:14:12,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 20:14:12,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 20:14:12,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 20:14:12,236 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 20:14:12,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 20:14:12,237 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 20:14:12,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 20:14:12,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 20:14:12,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 20:14:12,237 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 20:14:12,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 20:14:12,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 20:14:12,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 20:14:12,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 20:14:12,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 20:14:12,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 20:14:12,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 20:14:12,239 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 20:14:12,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 20:14:12,239 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 20:14:12,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 20:14:12,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 20:14:12,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 20:14:12,436 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 20:14:12,437 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 20:14:12,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-01-27 20:14:13,546 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 20:14:13,740 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 20:14:13,741 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-01-27 20:14:13,751 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4c209848/94acb9ffe396400da0d990925e28bb48/FLAGcf717ebde [2023-01-27 20:14:13,767 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4c209848/94acb9ffe396400da0d990925e28bb48 [2023-01-27 20:14:13,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 20:14:13,771 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 20:14:13,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 20:14:13,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 20:14:13,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 20:14:13,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 08:14:13" (1/1) ... [2023-01-27 20:14:13,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e98b0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:13, skipping insertion in model container [2023-01-27 20:14:13,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 08:14:13" (1/1) ... [2023-01-27 20:14:13,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 20:14:13,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 20:14:13,942 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/chl-name-comparator-trans.wvr.c[4788,4801] [2023-01-27 20:14:13,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 20:14:13,958 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 20:14:13,986 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/chl-name-comparator-trans.wvr.c[4788,4801] [2023-01-27 20:14:13,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 20:14:14,003 INFO L208 MainTranslator]: Completed translation [2023-01-27 20:14:14,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14 WrapperNode [2023-01-27 20:14:14,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 20:14:14,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 20:14:14,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 20:14:14,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 20:14:14,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,042 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 316 [2023-01-27 20:14:14,047 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 20:14:14,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 20:14:14,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 20:14:14,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 20:14:14,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,072 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 20:14:14,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 20:14:14,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 20:14:14,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 20:14:14,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (1/1) ... [2023-01-27 20:14:14,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 20:14:14,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:14,106 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 20:14:14,127 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 20:14:14,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 20:14:14,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 20:14:14,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 20:14:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 20:14:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 20:14:14,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 20:14:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 20:14:14,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 20:14:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 20:14:14,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 20:14:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 20:14:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 20:14:14,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 20:14:14,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 20:14:14,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 20:14:14,162 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 20:14:14,326 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 20:14:14,328 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 20:14:14,701 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 20:14:14,710 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 20:14:14,711 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-27 20:14:14,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 08:14:14 BoogieIcfgContainer [2023-01-27 20:14:14,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 20:14:14,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 20:14:14,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 20:14:14,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 20:14:14,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 08:14:13" (1/3) ... [2023-01-27 20:14:14,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a6876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 08:14:14, skipping insertion in model container [2023-01-27 20:14:14,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:14:14" (2/3) ... [2023-01-27 20:14:14,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a6876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 08:14:14, skipping insertion in model container [2023-01-27 20:14:14,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 08:14:14" (3/3) ... [2023-01-27 20:14:14,720 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-01-27 20:14:14,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 20:14:14,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 20:14:14,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 20:14:14,870 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 20:14:14,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 360 transitions, 744 flow [2023-01-27 20:14:15,052 INFO L130 PetriNetUnfolder]: 26/357 cut-off events. [2023-01-27 20:14:15,052 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 20:14:15,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 357 events. 26/357 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-01-27 20:14:15,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 360 transitions, 744 flow [2023-01-27 20:14:15,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 347 transitions, 712 flow [2023-01-27 20:14:15,076 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 20:14:15,096 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 331 places, 347 transitions, 712 flow [2023-01-27 20:14:15,099 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 331 places, 347 transitions, 712 flow [2023-01-27 20:14:15,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 347 transitions, 712 flow [2023-01-27 20:14:15,168 INFO L130 PetriNetUnfolder]: 26/347 cut-off events. [2023-01-27 20:14:15,168 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 20:14:15,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 26/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 807 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-01-27 20:14:15,186 INFO L119 LiptonReduction]: Number of co-enabled transitions 28350 [2023-01-27 20:14:24,978 INFO L134 LiptonReduction]: Checked pairs total: 26332 [2023-01-27 20:14:24,978 INFO L136 LiptonReduction]: Total number of compositions: 411 [2023-01-27 20:14:24,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 20:14:24,996 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;@19dec698, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 20:14:24,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 20:14:25,001 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-01-27 20:14:25,002 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 20:14:25,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:25,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:25,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:14:25,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash 938001691, now seen corresponding path program 1 times [2023-01-27 20:14:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743745266] [2023-01-27 20:14:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:25,415 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 20:14:25,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743745266] [2023-01-27 20:14:25,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743745266] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:25,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:25,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 20:14:25,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281462464] [2023-01-27 20:14:25,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:25,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 20:14:25,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 20:14:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 20:14:25,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 771 [2023-01-27 20:14:25,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:25,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 771 [2023-01-27 20:14:25,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:25,563 INFO L130 PetriNetUnfolder]: 221/328 cut-off events. [2023-01-27 20:14:25,563 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-01-27 20:14:25,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2023-01-27 20:14:25,566 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-01-27 20:14:25,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2023-01-27 20:14:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 20:14:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 20:14:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 995 transitions. [2023-01-27 20:14:25,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301772589710333 [2023-01-27 20:14:25,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 995 transitions. [2023-01-27 20:14:25,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 995 transitions. [2023-01-27 20:14:25,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:25,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 995 transitions. [2023-01-27 20:14:25,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,606 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 995 transitions. [2023-01-27 20:14:25,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2023-01-27 20:14:25,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 20:14:25,611 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-01-27 20:14:25,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-01-27 20:14:25,615 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-01-27 20:14:25,615 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-01-27 20:14:25,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:25,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:25,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:25,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 20:14:25,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:14:25,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1524160958, now seen corresponding path program 1 times [2023-01-27 20:14:25,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:25,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799546098] [2023-01-27 20:14:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:14:25,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799546098] [2023-01-27 20:14:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799546098] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600318363] [2023-01-27 20:14:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:25,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:25,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:25,773 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 20:14:25,798 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 20:14:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:25,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-27 20:14:25,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:14:25,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:14:26,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600318363] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:26,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:26,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 20:14:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814313917] [2023-01-27 20:14:26,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:26,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 20:14:26,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 20:14:26,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 20:14:26,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 771 [2023-01-27 20:14:26,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 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 20:14:26,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:26,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 771 [2023-01-27 20:14:26,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:26,115 INFO L130 PetriNetUnfolder]: 221/330 cut-off events. [2023-01-27 20:14:26,115 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 20:14:26,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2023-01-27 20:14:26,117 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-01-27 20:14:26,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2023-01-27 20:14:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:14:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:14:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1644 transitions. [2023-01-27 20:14:26,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264591439688716 [2023-01-27 20:14:26,122 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1644 transitions. [2023-01-27 20:14:26,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1644 transitions. [2023-01-27 20:14:26,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:26,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1644 transitions. [2023-01-27 20:14:26,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 328.8) internal successors, (1644), 5 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:26,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:26,139 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:26,140 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1644 transitions. [2023-01-27 20:14:26,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2023-01-27 20:14:26,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 20:14:26,141 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2023-01-27 20:14:26,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-01-27 20:14:26,142 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-01-27 20:14:26,142 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2023-01-27 20:14:26,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 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 20:14:26,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:26,144 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:26,157 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 20:14:26,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:26,350 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:14:26,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash -793936030, now seen corresponding path program 2 times [2023-01-27 20:14:26,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:26,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149731556] [2023-01-27 20:14:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:26,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:26,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:26,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149731556] [2023-01-27 20:14:26,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149731556] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:26,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:26,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 20:14:26,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942959771] [2023-01-27 20:14:26,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:26,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:14:26,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:26,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:14:26,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:14:26,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 771 [2023-01-27 20:14:26,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 289.2) internal successors, (1446), 5 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:26,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:26,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 771 [2023-01-27 20:14:26,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:27,062 INFO L130 PetriNetUnfolder]: 381/567 cut-off events. [2023-01-27 20:14:27,062 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 20:14:27,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1711 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2023-01-27 20:14:27,064 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2023-01-27 20:14:27,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2023-01-27 20:14:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:14:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:14:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1194 transitions. [2023-01-27 20:14:27,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38715953307393 [2023-01-27 20:14:27,068 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1194 transitions. [2023-01-27 20:14:27,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1194 transitions. [2023-01-27 20:14:27,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:27,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1194 transitions. [2023-01-27 20:14:27,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:27,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:27,078 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:27,078 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1194 transitions. [2023-01-27 20:14:27,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2023-01-27 20:14:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-27 20:14:27,079 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2023-01-27 20:14:27,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-01-27 20:14:27,080 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-01-27 20:14:27,081 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2023-01-27 20:14:27,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.2) internal successors, (1446), 5 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:27,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:27,082 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:27,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 20:14:27,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:14:27,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 529846484, now seen corresponding path program 1 times [2023-01-27 20:14:27,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:27,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748905708] [2023-01-27 20:14:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:27,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:27,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:27,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748905708] [2023-01-27 20:14:27,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748905708] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:14:27,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:14:27,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 20:14:27,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7457057] [2023-01-27 20:14:27,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:14:27,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:14:27,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:14:27,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:14:27,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 771 [2023-01-27 20:14:27,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 300.5) internal successors, (1202), 4 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:27,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:27,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 771 [2023-01-27 20:14:27,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:27,646 INFO L130 PetriNetUnfolder]: 462/680 cut-off events. [2023-01-27 20:14:27,647 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-01-27 20:14:27,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2167 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2023-01-27 20:14:27,650 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2023-01-27 20:14:27,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2023-01-27 20:14:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:14:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:14:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1232 transitions. [2023-01-27 20:14:27,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39948119325551235 [2023-01-27 20:14:27,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1232 transitions. [2023-01-27 20:14:27,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1232 transitions. [2023-01-27 20:14:27,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:27,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1232 transitions. [2023-01-27 20:14:27,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:27,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:27,664 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:27,665 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1232 transitions. [2023-01-27 20:14:27,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2023-01-27 20:14:27,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-27 20:14:27,667 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-01-27 20:14:27,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-01-27 20:14:27,667 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-01-27 20:14:27,668 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-01-27 20:14:27,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 300.5) internal successors, (1202), 4 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:27,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:27,669 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:27,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 20:14:27,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:14:27,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1499019307, now seen corresponding path program 1 times [2023-01-27 20:14:27,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:27,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192431655] [2023-01-27 20:14:27,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:27,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:14:29,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:29,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192431655] [2023-01-27 20:14:29,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192431655] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:29,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396212204] [2023-01-27 20:14:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:29,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:29,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:29,713 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 20:14:29,716 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 20:14:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:29,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-27 20:14:29,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:30,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 202 treesize of output 138 [2023-01-27 20:14:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:31,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:33,092 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:33,093 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 200 treesize of output 108 [2023-01-27 20:14:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:33,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396212204] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:33,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:33,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 32 [2023-01-27 20:14:33,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451136652] [2023-01-27 20:14:33,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:33,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 20:14:33,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:33,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 20:14:33,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 20:14:33,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 771 [2023-01-27 20:14:33,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 33 states, 33 states have (on average 231.15151515151516) internal successors, (7628), 33 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:33,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:33,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 771 [2023-01-27 20:14:33,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:14:55,081 INFO L130 PetriNetUnfolder]: 2871/4544 cut-off events. [2023-01-27 20:14:55,081 INFO L131 PetriNetUnfolder]: For 1055/1055 co-relation queries the response was YES. [2023-01-27 20:14:55,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11251 conditions, 4544 events. 2871/4544 cut-off events. For 1055/1055 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25278 event pairs, 148 based on Foata normal form. 15/3302 useless extension candidates. Maximal degree in co-relation 11225. Up to 1113 conditions per place. [2023-01-27 20:14:55,102 INFO L137 encePairwiseOnDemand]: 758/771 looper letters, 603 selfloop transitions, 231 changer transitions 99/933 dead transitions. [2023-01-27 20:14:55,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 933 transitions, 4425 flow [2023-01-27 20:14:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-01-27 20:14:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-01-27 20:14:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 26585 transitions. [2023-01-27 20:14:55,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3078677969242172 [2023-01-27 20:14:55,161 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 26585 transitions. [2023-01-27 20:14:55,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 26585 transitions. [2023-01-27 20:14:55,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:14:55,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 26585 transitions. [2023-01-27 20:14:55,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 237.36607142857142) internal successors, (26585), 112 states have internal predecessors, (26585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:55,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:55,344 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:55,344 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 112 states and 26585 transitions. [2023-01-27 20:14:55,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 933 transitions, 4425 flow [2023-01-27 20:14:55,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 933 transitions, 4305 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-01-27 20:14:55,365 INFO L231 Difference]: Finished difference. Result has 216 places, 271 transitions, 1851 flow [2023-01-27 20:14:55,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=1851, PETRI_PLACES=216, PETRI_TRANSITIONS=271} [2023-01-27 20:14:55,367 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2023-01-27 20:14:55,367 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 271 transitions, 1851 flow [2023-01-27 20:14:55,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 231.15151515151516) internal successors, (7628), 33 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:55,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:14:55,370 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:14:55,378 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 20:14:55,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:55,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:14:55,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:14:55,576 INFO L85 PathProgramCache]: Analyzing trace with hash -99656019, now seen corresponding path program 2 times [2023-01-27 20:14:55,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:14:55,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478402307] [2023-01-27 20:14:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:14:55,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:14:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:14:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:56,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:14:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478402307] [2023-01-27 20:14:56,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478402307] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:14:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753196470] [2023-01-27 20:14:56,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:14:56,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:14:56,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:14:56,897 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 20:14:56,920 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 20:14:57,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:14:57,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:14:57,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-27 20:14:57,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:14:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:14:57,360 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 100 treesize of output 90 [2023-01-27 20:14:58,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 171 treesize of output 115 [2023-01-27 20:14:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:58,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:14:59,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:14:59,473 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 219 treesize of output 139 [2023-01-27 20:14:59,479 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 30 treesize of output 26 [2023-01-27 20:14:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:14:59,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753196470] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:14:59,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:14:59,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 20:14:59,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093320572] [2023-01-27 20:14:59,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:14:59,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 20:14:59,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:14:59,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 20:14:59,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1075, Unknown=1, NotChecked=0, Total=1190 [2023-01-27 20:14:59,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-01-27 20:14:59,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 271 transitions, 1851 flow. Second operand has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:14:59,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:14:59,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-01-27 20:14:59,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:12,332 INFO L130 PetriNetUnfolder]: 6428/10131 cut-off events. [2023-01-27 20:15:12,332 INFO L131 PetriNetUnfolder]: For 601915/601915 co-relation queries the response was YES. [2023-01-27 20:15:12,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109709 conditions, 10131 events. 6428/10131 cut-off events. For 601915/601915 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 64574 event pairs, 460 based on Foata normal form. 5/8713 useless extension candidates. Maximal degree in co-relation 109612. Up to 3098 conditions per place. [2023-01-27 20:15:12,482 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 416 selfloop transitions, 522 changer transitions 25/963 dead transitions. [2023-01-27 20:15:12,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 963 transitions, 11580 flow [2023-01-27 20:15:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-27 20:15:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-27 20:15:12,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 12488 transitions. [2023-01-27 20:15:12,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31759110907657484 [2023-01-27 20:15:12,498 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 12488 transitions. [2023-01-27 20:15:12,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 12488 transitions. [2023-01-27 20:15:12,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:12,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 12488 transitions. [2023-01-27 20:15:12,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 244.86274509803923) internal successors, (12488), 51 states have internal predecessors, (12488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:12,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:12,556 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:12,556 INFO L175 Difference]: Start difference. First operand has 216 places, 271 transitions, 1851 flow. Second operand 51 states and 12488 transitions. [2023-01-27 20:15:12,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 963 transitions, 11580 flow [2023-01-27 20:15:14,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 963 transitions, 10471 flow, removed 518 selfloop flow, removed 17 redundant places. [2023-01-27 20:15:14,119 INFO L231 Difference]: Finished difference. Result has 254 places, 671 transitions, 8994 flow [2023-01-27 20:15:14,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8994, PETRI_PLACES=254, PETRI_TRANSITIONS=671} [2023-01-27 20:15:14,120 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2023-01-27 20:15:14,120 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 671 transitions, 8994 flow [2023-01-27 20:15:14,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:14,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:14,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:14,128 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 20:15:14,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:14,329 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:15:14,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:14,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1692020307, now seen corresponding path program 3 times [2023-01-27 20:15:14,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:14,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640406930] [2023-01-27 20:15:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:14,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:15,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:15,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640406930] [2023-01-27 20:15:15,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640406930] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:15,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630128210] [2023-01-27 20:15:15,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:15:15,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:15,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:15,162 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 20:15:15,165 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 20:15:15,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:15:15,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 20:15:15,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:16,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 133 treesize of output 89 [2023-01-27 20:15:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:16,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:16,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:16,991 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 136 treesize of output 76 [2023-01-27 20:15:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:17,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630128210] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:17,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:17,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-01-27 20:15:17,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877207728] [2023-01-27 20:15:17,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:17,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 20:15:17,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:17,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 20:15:17,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:15:17,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 771 [2023-01-27 20:15:17,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 671 transitions, 8994 flow. Second operand has 22 states, 22 states have (on average 259.8181818181818) internal successors, (5716), 22 states have internal predecessors, (5716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:17,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:17,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 771 [2023-01-27 20:15:17,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:15:22,332 INFO L130 PetriNetUnfolder]: 8336/12983 cut-off events. [2023-01-27 20:15:22,332 INFO L131 PetriNetUnfolder]: For 877237/877237 co-relation queries the response was YES. [2023-01-27 20:15:22,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147306 conditions, 12983 events. 8336/12983 cut-off events. For 877237/877237 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 83351 event pairs, 1143 based on Foata normal form. 8/11887 useless extension candidates. Maximal degree in co-relation 147205. Up to 3916 conditions per place. [2023-01-27 20:15:22,522 INFO L137 encePairwiseOnDemand]: 761/771 looper letters, 962 selfloop transitions, 361 changer transitions 71/1394 dead transitions. [2023-01-27 20:15:22,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1394 transitions, 30002 flow [2023-01-27 20:15:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 20:15:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 20:15:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 7750 transitions. [2023-01-27 20:15:22,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346616574980992 [2023-01-27 20:15:22,584 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 7750 transitions. [2023-01-27 20:15:22,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 7750 transitions. [2023-01-27 20:15:22,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:15:22,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 7750 transitions. [2023-01-27 20:15:22,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 267.2413793103448) internal successors, (7750), 29 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:22,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:22,615 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:22,616 INFO L175 Difference]: Start difference. First operand has 254 places, 671 transitions, 8994 flow. Second operand 29 states and 7750 transitions. [2023-01-27 20:15:22,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1394 transitions, 30002 flow [2023-01-27 20:15:45,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1394 transitions, 13642 flow, removed 8142 selfloop flow, removed 4 redundant places. [2023-01-27 20:15:45,021 INFO L231 Difference]: Finished difference. Result has 297 places, 875 transitions, 7455 flow [2023-01-27 20:15:45,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7455, PETRI_PLACES=297, PETRI_TRANSITIONS=875} [2023-01-27 20:15:45,022 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2023-01-27 20:15:45,022 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 875 transitions, 7455 flow [2023-01-27 20:15:45,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 259.8181818181818) internal successors, (5716), 22 states have internal predecessors, (5716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:45,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:15:45,023 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:15:45,031 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 20:15:45,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:45,228 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:15:45,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:15:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1447694667, now seen corresponding path program 4 times [2023-01-27 20:15:45,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:15:45,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277048804] [2023-01-27 20:15:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:15:45,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:15:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:15:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:46,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:15:46,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277048804] [2023-01-27 20:15:46,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277048804] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:15:46,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126133527] [2023-01-27 20:15:46,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:15:46,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:15:46,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:15:46,077 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 20:15:46,101 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 20:15:46,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:15:46,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:15:46,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 20:15:46,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:15:46,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:15:46,599 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 39 treesize of output 37 [2023-01-27 20:15:46,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 125 treesize of output 81 [2023-01-27 20:15:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:47,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:15:48,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:15:48,325 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 212 treesize of output 132 [2023-01-27 20:15:48,332 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 46 treesize of output 44 [2023-01-27 20:15:48,338 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 44 treesize of output 42 [2023-01-27 20:15:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:15:48,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126133527] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:15:48,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:15:48,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-01-27 20:15:48,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999206705] [2023-01-27 20:15:48,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:15:48,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 20:15:48,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:15:48,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 20:15:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=928, Unknown=19, NotChecked=0, Total=1056 [2023-01-27 20:15:48,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-01-27 20:15:48,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 875 transitions, 7455 flow. Second operand has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:15:48,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:15:48,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-01-27 20:15:48,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:00,398 INFO L130 PetriNetUnfolder]: 13942/22118 cut-off events. [2023-01-27 20:16:00,398 INFO L131 PetriNetUnfolder]: For 243772/243772 co-relation queries the response was YES. [2023-01-27 20:16:00,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120382 conditions, 22118 events. 13942/22118 cut-off events. For 243772/243772 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 159485 event pairs, 1693 based on Foata normal form. 21/20315 useless extension candidates. Maximal degree in co-relation 120274. Up to 4592 conditions per place. [2023-01-27 20:16:00,725 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 1215 selfloop transitions, 693 changer transitions 73/1981 dead transitions. [2023-01-27 20:16:00,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1981 transitions, 22237 flow [2023-01-27 20:16:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-27 20:16:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-27 20:16:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 9387 transitions. [2023-01-27 20:16:00,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.320397296743805 [2023-01-27 20:16:00,738 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 9387 transitions. [2023-01-27 20:16:00,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 9387 transitions. [2023-01-27 20:16:00,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:00,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 9387 transitions. [2023-01-27 20:16:00,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 247.02631578947367) internal successors, (9387), 38 states have internal predecessors, (9387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:00,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 771.0) internal successors, (30069), 39 states have internal predecessors, (30069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:00,782 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 771.0) internal successors, (30069), 39 states have internal predecessors, (30069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:00,782 INFO L175 Difference]: Start difference. First operand has 297 places, 875 transitions, 7455 flow. Second operand 38 states and 9387 transitions. [2023-01-27 20:16:00,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1981 transitions, 22237 flow [2023-01-27 20:16:03,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1981 transitions, 21793 flow, removed 186 selfloop flow, removed 8 redundant places. [2023-01-27 20:16:03,263 INFO L231 Difference]: Finished difference. Result has 344 places, 1262 transitions, 13766 flow [2023-01-27 20:16:03,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13766, PETRI_PLACES=344, PETRI_TRANSITIONS=1262} [2023-01-27 20:16:03,264 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 314 predicate places. [2023-01-27 20:16:03,264 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1262 transitions, 13766 flow [2023-01-27 20:16:03,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:03,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:03,265 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:03,271 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 20:16:03,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:03,471 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:16:03,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1234564250, now seen corresponding path program 5 times [2023-01-27 20:16:03,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:03,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911784057] [2023-01-27 20:16:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:16:04,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911784057] [2023-01-27 20:16:04,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911784057] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415385427] [2023-01-27 20:16:04,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:16:04,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:04,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:04,849 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 20:16:04,851 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 20:16:04,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:16:04,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:04,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-27 20:16:04,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:05,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 104 treesize of output 72 [2023-01-27 20:16:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:05,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:06,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:06,022 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 117 treesize of output 69 [2023-01-27 20:16:06,103 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 20:16:06,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415385427] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:06,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:06,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 31 [2023-01-27 20:16:06,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612984687] [2023-01-27 20:16:06,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:06,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:16:06,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:06,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:16:06,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-01-27 20:16:06,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-01-27 20:16:06,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1262 transitions, 13766 flow. Second operand has 31 states, 31 states have (on average 239.1290322580645) internal successors, (7413), 31 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:06,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:06,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-01-27 20:16:06,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:18,307 INFO L130 PetriNetUnfolder]: 17917/29495 cut-off events. [2023-01-27 20:16:18,307 INFO L131 PetriNetUnfolder]: For 410292/410292 co-relation queries the response was YES. [2023-01-27 20:16:18,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178763 conditions, 29495 events. 17917/29495 cut-off events. For 410292/410292 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 235297 event pairs, 3142 based on Foata normal form. 64/26993 useless extension candidates. Maximal degree in co-relation 178623. Up to 10768 conditions per place. [2023-01-27 20:16:18,764 INFO L137 encePairwiseOnDemand]: 757/771 looper letters, 1580 selfloop transitions, 715 changer transitions 27/2322 dead transitions. [2023-01-27 20:16:18,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 2322 transitions, 30986 flow [2023-01-27 20:16:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-27 20:16:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-27 20:16:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 10122 transitions. [2023-01-27 20:16:18,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3202049919331878 [2023-01-27 20:16:18,782 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 10122 transitions. [2023-01-27 20:16:18,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 10122 transitions. [2023-01-27 20:16:18,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:18,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 10122 transitions. [2023-01-27 20:16:18,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 246.8780487804878) internal successors, (10122), 41 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:18,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:18,830 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:18,830 INFO L175 Difference]: Start difference. First operand has 344 places, 1262 transitions, 13766 flow. Second operand 41 states and 10122 transitions. [2023-01-27 20:16:18,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 2322 transitions, 30986 flow [2023-01-27 20:16:25,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 2322 transitions, 28322 flow, removed 1304 selfloop flow, removed 8 redundant places. [2023-01-27 20:16:25,871 INFO L231 Difference]: Finished difference. Result has 400 places, 1578 transitions, 19480 flow [2023-01-27 20:16:25,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=12694, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=19480, PETRI_PLACES=400, PETRI_TRANSITIONS=1578} [2023-01-27 20:16:25,873 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 370 predicate places. [2023-01-27 20:16:25,873 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1578 transitions, 19480 flow [2023-01-27 20:16:25,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 239.1290322580645) internal successors, (7413), 31 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:25,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:16:25,874 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:16:25,879 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 20:16:26,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:26,075 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:16:26,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:16:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1440443928, now seen corresponding path program 6 times [2023-01-27 20:16:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:16:26,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367843574] [2023-01-27 20:16:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:16:26,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:16:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:16:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:16:27,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:16:27,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367843574] [2023-01-27 20:16:27,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367843574] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:16:27,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718302979] [2023-01-27 20:16:27,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:16:27,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:16:27,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:16:27,335 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 20:16:27,336 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 20:16:27,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:16:27,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:16:27,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 20:16:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:16:27,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 112 treesize of output 80 [2023-01-27 20:16:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:16:27,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:16:28,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:16:28,262 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 117 treesize of output 69 [2023-01-27 20:16:28,332 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 20:16:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718302979] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:16:28,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:16:28,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 30 [2023-01-27 20:16:28,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214117658] [2023-01-27 20:16:28,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:16:28,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 20:16:28,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:16:28,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 20:16:28,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2023-01-27 20:16:28,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 771 [2023-01-27 20:16:28,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1578 transitions, 19480 flow. Second operand has 30 states, 30 states have (on average 239.96666666666667) internal successors, (7199), 30 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:28,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:16:28,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 771 [2023-01-27 20:16:28,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:16:56,953 INFO L130 PetriNetUnfolder]: 39088/64313 cut-off events. [2023-01-27 20:16:56,954 INFO L131 PetriNetUnfolder]: For 1186605/1186605 co-relation queries the response was YES. [2023-01-27 20:16:58,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438989 conditions, 64313 events. 39088/64313 cut-off events. For 1186605/1186605 co-relation queries the response was YES. Maximal size of possible extension queue 3353. Compared 567099 event pairs, 9553 based on Foata normal form. 32/58817 useless extension candidates. Maximal degree in co-relation 437467. Up to 20579 conditions per place. [2023-01-27 20:16:59,287 INFO L137 encePairwiseOnDemand]: 758/771 looper letters, 3528 selfloop transitions, 827 changer transitions 0/4355 dead transitions. [2023-01-27 20:16:59,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 4355 transitions, 63280 flow [2023-01-27 20:16:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-01-27 20:16:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-01-27 20:16:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 13458 transitions. [2023-01-27 20:16:59,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32324542441273957 [2023-01-27 20:16:59,296 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 13458 transitions. [2023-01-27 20:16:59,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 13458 transitions. [2023-01-27 20:16:59,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:16:59,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 13458 transitions. [2023-01-27 20:16:59,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 249.22222222222223) internal successors, (13458), 54 states have internal predecessors, (13458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:59,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 771.0) internal successors, (42405), 55 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:59,345 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 771.0) internal successors, (42405), 55 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:16:59,346 INFO L175 Difference]: Start difference. First operand has 400 places, 1578 transitions, 19480 flow. Second operand 54 states and 13458 transitions. [2023-01-27 20:16:59,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 4355 transitions, 63280 flow [2023-01-27 20:17:37,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 4355 transitions, 60299 flow, removed 1396 selfloop flow, removed 13 redundant places. [2023-01-27 20:17:37,682 INFO L231 Difference]: Finished difference. Result has 472 places, 2136 transitions, 28870 flow [2023-01-27 20:17:37,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=18445, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=28870, PETRI_PLACES=472, PETRI_TRANSITIONS=2136} [2023-01-27 20:17:37,683 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 442 predicate places. [2023-01-27 20:17:37,683 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 2136 transitions, 28870 flow [2023-01-27 20:17:37,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 239.96666666666667) internal successors, (7199), 30 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:37,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:17:37,684 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:17:37,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-27 20:17:37,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:37,885 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:17:37,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:17:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1001808469, now seen corresponding path program 7 times [2023-01-27 20:17:37,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:17:37,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589339841] [2023-01-27 20:17:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:17:37,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:17:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:17:38,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:17:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589339841] [2023-01-27 20:17:38,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589339841] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:17:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401158125] [2023-01-27 20:17:38,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:17:38,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:17:38,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:17:38,989 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 20:17:38,991 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 20:17:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:17:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-27 20:17:39,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:17:39,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 149 treesize of output 97 [2023-01-27 20:17:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:39,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:17:40,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:17:40,315 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 100 treesize of output 60 [2023-01-27 20:17:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:17:40,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401158125] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:17:40,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:17:40,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2023-01-27 20:17:40,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454183561] [2023-01-27 20:17:40,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:17:40,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:17:40,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:17:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:17:40,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:17:40,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 771 [2023-01-27 20:17:40,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 2136 transitions, 28870 flow. Second operand has 32 states, 32 states have (on average 224.1875) internal successors, (7174), 32 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:17:40,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:17:40,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 771 [2023-01-27 20:17:40,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:18:43,073 INFO L130 PetriNetUnfolder]: 62594/106641 cut-off events. [2023-01-27 20:18:43,074 INFO L131 PetriNetUnfolder]: For 1896930/1896930 co-relation queries the response was YES. [2023-01-27 20:18:47,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750455 conditions, 106641 events. 62594/106641 cut-off events. For 1896930/1896930 co-relation queries the response was YES. Maximal size of possible extension queue 5635. Compared 1058101 event pairs, 5673 based on Foata normal form. 22/93785 useless extension candidates. Maximal degree in co-relation 749780. Up to 23981 conditions per place. [2023-01-27 20:18:47,636 INFO L137 encePairwiseOnDemand]: 756/771 looper letters, 4126 selfloop transitions, 3078 changer transitions 130/7334 dead transitions. [2023-01-27 20:18:47,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 7334 transitions, 107827 flow [2023-01-27 20:18:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-01-27 20:18:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2023-01-27 20:18:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 27246 transitions. [2023-01-27 20:18:47,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29696236471242193 [2023-01-27 20:18:47,660 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 27246 transitions. [2023-01-27 20:18:47,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 27246 transitions. [2023-01-27 20:18:47,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:18:47,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 27246 transitions. [2023-01-27 20:18:47,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 228.9579831932773) internal successors, (27246), 119 states have internal predecessors, (27246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:47,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 771.0) internal successors, (92520), 120 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:47,766 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 771.0) internal successors, (92520), 120 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:18:47,766 INFO L175 Difference]: Start difference. First operand has 472 places, 2136 transitions, 28870 flow. Second operand 119 states and 27246 transitions. [2023-01-27 20:18:47,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 7334 transitions, 107827 flow [2023-01-27 20:20:02,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 7334 transitions, 107182 flow, removed 199 selfloop flow, removed 6 redundant places. [2023-01-27 20:20:02,302 INFO L231 Difference]: Finished difference. Result has 642 places, 4623 transitions, 73509 flow [2023-01-27 20:20:02,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=28625, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=73509, PETRI_PLACES=642, PETRI_TRANSITIONS=4623} [2023-01-27 20:20:02,305 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 612 predicate places. [2023-01-27 20:20:02,305 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 4623 transitions, 73509 flow [2023-01-27 20:20:02,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 224.1875) internal successors, (7174), 32 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:02,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:20:02,306 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:20:02,313 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 20:20:02,511 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,SelfDestructingSolverStorable10 [2023-01-27 20:20:02,512 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 20:20:02,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:20:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash -770250497, now seen corresponding path program 8 times [2023-01-27 20:20:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:20:02,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466935312] [2023-01-27 20:20:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:20:02,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:20:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:20:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:20:03,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:20:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466935312] [2023-01-27 20:20:03,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466935312] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:20:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474178357] [2023-01-27 20:20:03,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:20:03,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:20:03,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:20:03,708 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 20:20:03,709 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 20:20:03,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:20:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:20:03,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 20:20:03,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:20:04,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 187 treesize of output 127 [2023-01-27 20:20:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:20:04,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:20:05,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:20:05,835 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 180 treesize of output 108 [2023-01-27 20:20:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:20:06,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474178357] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:20:06,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:20:06,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 33 [2023-01-27 20:20:06,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484466804] [2023-01-27 20:20:06,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:20:06,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-27 20:20:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:20:06,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-27 20:20:06,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2023-01-27 20:20:06,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 771 [2023-01-27 20:20:06,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 4623 transitions, 73509 flow. Second operand has 34 states, 34 states have (on average 228.02941176470588) internal successors, (7753), 34 states have internal predecessors, (7753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:20:06,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:20:06,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 771 [2023-01-27 20:20:06,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand