/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/unroll-cond-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:14:46,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:14:46,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:14:46,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 23:14:46,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 23:14:46,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 23:14:46,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 23:14:46,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 23:14:46,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 23:14:46,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 23:14:46,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 23:14:46,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 23:14:46,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:14:46,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:14:46,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:14:46,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:14:46,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:14:46,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:14:46,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:14:46,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:14:46,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:14:46,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:14:46,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:14:46,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:14:46,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 23:14:46,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 23:14:46,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 23:14:46,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 23:14:46,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 23:14:46,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 23:14:46,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 23:14:46,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 23:14:46,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 23:14:46,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 23:14:46,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 23:14:46,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 23:14:46,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 23:14:46,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 23:14:46,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:14:46,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:14:46,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:14:46,201 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 23:14:46,222 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:14:46,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:14:46,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:14:46,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:14:46,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:14:46,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:14:46,223 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:14:46,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:14:46,223 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:14:46,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:14:46,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:14:46,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:14:46,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:14:46,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:14:46,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:14:46,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:14:46,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:14:46,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:14:46,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:14:46,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:14:46,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:14:46,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 23:14:46,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:14:46,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:14:46,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:14:46,366 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:14:46,369 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:14:46,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-01-27 23:14:47,269 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:14:47,402 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:14:47,403 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-01-27 23:14:47,410 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471915fdc/6fe88be162334008ba9ad4b6013e633c/FLAG570c87d9a [2023-01-27 23:14:47,422 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/471915fdc/6fe88be162334008ba9ad4b6013e633c [2023-01-27 23:14:47,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:14:47,424 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:14:47,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:14:47,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:14:47,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:14:47,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b5f1562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47, skipping insertion in model container [2023-01-27 23:14:47,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:14:47,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:14:47,551 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/unroll-cond-2.wvr.c[2474,2487] [2023-01-27 23:14:47,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:14:47,561 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:14:47,574 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/unroll-cond-2.wvr.c[2474,2487] [2023-01-27 23:14:47,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:14:47,584 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:14:47,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47 WrapperNode [2023-01-27 23:14:47,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:14:47,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:14:47,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:14:47,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:14:47,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,606 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2023-01-27 23:14:47,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:14:47,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:14:47,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:14:47,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:14:47,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,621 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:14:47,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:14:47,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:14:47,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:14:47,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (1/1) ... [2023-01-27 23:14:47,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:14:47,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:47,662 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 23:14:47,664 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 23:14:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:14:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 23:14:47,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 23:14:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 23:14:47,690 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 23:14:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:14:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:14:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:14:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 23:14:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:14:47,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:14:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 23:14:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:14:47,692 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 23:14:47,770 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:14:47,771 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:14:47,970 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:14:47,976 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:14:47,976 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 23:14:47,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:14:47 BoogieIcfgContainer [2023-01-27 23:14:47,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:14:47,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:14:47,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:14:47,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:14:47,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:14:47" (1/3) ... [2023-01-27 23:14:47,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cbc601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:14:47, skipping insertion in model container [2023-01-27 23:14:47,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:14:47" (2/3) ... [2023-01-27 23:14:47,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cbc601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:14:47, skipping insertion in model container [2023-01-27 23:14:47,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:14:47" (3/3) ... [2023-01-27 23:14:47,982 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2023-01-27 23:14:47,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:14:47,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 23:14:47,993 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:14:48,054 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 23:14:48,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 166 transitions, 348 flow [2023-01-27 23:14:48,141 INFO L130 PetriNetUnfolder]: 15/164 cut-off events. [2023-01-27 23:14:48,141 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:14:48,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 15/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 205 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-01-27 23:14:48,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 166 transitions, 348 flow [2023-01-27 23:14:48,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 156 transitions, 324 flow [2023-01-27 23:14:48,153 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:14:48,159 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 156 transitions, 324 flow [2023-01-27 23:14:48,161 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 156 transitions, 324 flow [2023-01-27 23:14:48,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 156 transitions, 324 flow [2023-01-27 23:14:48,208 INFO L130 PetriNetUnfolder]: 15/156 cut-off events. [2023-01-27 23:14:48,208 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:14:48,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 15/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 203 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-01-27 23:14:48,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 2692 [2023-01-27 23:14:51,605 INFO L134 LiptonReduction]: Checked pairs total: 2696 [2023-01-27 23:14:51,605 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-01-27 23:14:51,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:14:51,623 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;@75de234e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:14:51,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 23:14:51,627 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-27 23:14:51,627 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:14:51,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:51,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:51,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:51,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash -526169532, now seen corresponding path program 1 times [2023-01-27 23:14:51,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:51,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086770808] [2023-01-27 23:14:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:51,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:51,884 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 23:14:51,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:51,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086770808] [2023-01-27 23:14:51,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086770808] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:14:51,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:14:51,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:14:51,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011406552] [2023-01-27 23:14:51,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:14:51,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:14:51,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:51,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:14:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:14:51,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 347 [2023-01-27 23:14:51,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:51,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:51,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 347 [2023-01-27 23:14:51,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:51,948 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-01-27 23:14:51,948 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 23:14:51,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-01-27 23:14:51,950 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-01-27 23:14:51,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-01-27 23:14:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:14:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:14:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-01-27 23:14:51,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169068203650336 [2023-01-27 23:14:51,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-01-27 23:14:51,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-01-27 23:14:51,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:51,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-01-27 23:14:51,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:51,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:51,969 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:51,970 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 434 transitions. [2023-01-27 23:14:51,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-01-27 23:14:51,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 23:14:51,988 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-01-27 23:14:51,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-01-27 23:14:51,991 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-27 23:14:51,991 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-01-27 23:14:51,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:51,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:51,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:51,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 23:14:51,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:51,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1480683613, now seen corresponding path program 1 times [2023-01-27 23:14:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:51,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054182619] [2023-01-27 23:14:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:51,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:52,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054182619] [2023-01-27 23:14:52,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054182619] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:14:52,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:14:52,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:14:52,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435690849] [2023-01-27 23:14:52,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:14:52,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:14:52,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:14:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:14:52,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:14:52,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:52,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:14:52,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:52,330 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2023-01-27 23:14:52,331 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:14:52,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 363 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-01-27 23:14:52,332 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-01-27 23:14:52,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-01-27 23:14:52,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:14:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:14:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 700 transitions. [2023-01-27 23:14:52,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034582132564842 [2023-01-27 23:14:52,334 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 700 transitions. [2023-01-27 23:14:52,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 700 transitions. [2023-01-27 23:14:52,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:52,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 700 transitions. [2023-01-27 23:14:52,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,340 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,340 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 700 transitions. [2023-01-27 23:14:52,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-01-27 23:14:52,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 23:14:52,341 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-01-27 23:14:52,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-01-27 23:14:52,342 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-01-27 23:14:52,342 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-01-27 23:14:52,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:52,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:52,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:14:52,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:52,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:52,343 INFO L85 PathProgramCache]: Analyzing trace with hash 182747709, now seen corresponding path program 2 times [2023-01-27 23:14:52,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:52,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004243061] [2023-01-27 23:14:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:52,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:52,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:52,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004243061] [2023-01-27 23:14:52,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004243061] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:14:52,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:14:52,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:14:52,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843495853] [2023-01-27 23:14:52,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:14:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:14:52,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:52,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:14:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:14:52,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:14:52,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:52,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:14:52,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:52,557 INFO L130 PetriNetUnfolder]: 109/198 cut-off events. [2023-01-27 23:14:52,557 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-01-27 23:14:52,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 606 event pairs, 24 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 560. Up to 87 conditions per place. [2023-01-27 23:14:52,560 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-01-27 23:14:52,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2023-01-27 23:14:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 23:14:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 23:14:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 840 transitions. [2023-01-27 23:14:52,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034582132564842 [2023-01-27 23:14:52,562 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 840 transitions. [2023-01-27 23:14:52,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 840 transitions. [2023-01-27 23:14:52,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:52,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 840 transitions. [2023-01-27 23:14:52,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,567 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,567 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 840 transitions. [2023-01-27 23:14:52,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2023-01-27 23:14:52,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-27 23:14:52,570 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2023-01-27 23:14:52,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-01-27 23:14:52,571 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-01-27 23:14:52,577 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2023-01-27 23:14:52,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:52,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:52,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:14:52,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:52,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1504917559, now seen corresponding path program 3 times [2023-01-27 23:14:52,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:52,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060280893] [2023-01-27 23:14:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:52,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:52,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:52,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060280893] [2023-01-27 23:14:52,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060280893] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:14:52,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:14:52,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:14:52,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988018265] [2023-01-27 23:14:52,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:14:52,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:14:52,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:52,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:14:52,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:14:52,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:14:52,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:52,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:14:52,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:52,813 INFO L130 PetriNetUnfolder]: 119/214 cut-off events. [2023-01-27 23:14:52,813 INFO L131 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2023-01-27 23:14:52,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 686 event pairs, 28 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 778. Up to 111 conditions per place. [2023-01-27 23:14:52,814 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-01-27 23:14:52,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2023-01-27 23:14:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:14:52,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:14:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 701 transitions. [2023-01-27 23:14:52,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4040345821325648 [2023-01-27 23:14:52,816 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 701 transitions. [2023-01-27 23:14:52,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 701 transitions. [2023-01-27 23:14:52,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:52,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 701 transitions. [2023-01-27 23:14:52,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,824 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,825 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 701 transitions. [2023-01-27 23:14:52,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2023-01-27 23:14:52,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-01-27 23:14:52,830 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2023-01-27 23:14:52,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-01-27 23:14:52,831 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-01-27 23:14:52,832 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2023-01-27 23:14:52,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:52,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:52,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:52,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 23:14:52,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:52,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1764589935, now seen corresponding path program 4 times [2023-01-27 23:14:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:52,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532709153] [2023-01-27 23:14:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:52,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:53,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:53,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532709153] [2023-01-27 23:14:53,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532709153] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:14:53,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:14:53,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:14:53,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430495793] [2023-01-27 23:14:53,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:14:53,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:14:53,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:14:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:14:53,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:14:53,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:53,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:14:53,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:53,091 INFO L130 PetriNetUnfolder]: 115/210 cut-off events. [2023-01-27 23:14:53,091 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-01-27 23:14:53,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 210 events. 115/210 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 663 event pairs, 36 based on Foata normal form. 4/189 useless extension candidates. Maximal degree in co-relation 848. Up to 167 conditions per place. [2023-01-27 23:14:53,093 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-01-27 23:14:53,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2023-01-27 23:14:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:14:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:14:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 695 transitions. [2023-01-27 23:14:53,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40057636887608067 [2023-01-27 23:14:53,095 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 695 transitions. [2023-01-27 23:14:53,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 695 transitions. [2023-01-27 23:14:53,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:53,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 695 transitions. [2023-01-27 23:14:53,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,099 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,099 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 695 transitions. [2023-01-27 23:14:53,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2023-01-27 23:14:53,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-27 23:14:53,102 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2023-01-27 23:14:53,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-01-27 23:14:53,104 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-01-27 23:14:53,104 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2023-01-27 23:14:53,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:53,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:53,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 23:14:53,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:53,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:53,105 INFO L85 PathProgramCache]: Analyzing trace with hash -467573743, now seen corresponding path program 5 times [2023-01-27 23:14:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:53,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595865161] [2023-01-27 23:14:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:53,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:53,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595865161] [2023-01-27 23:14:53,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595865161] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:14:53,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:14:53,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:14:53,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29829947] [2023-01-27 23:14:53,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:14:53,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:14:53,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:14:53,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:14:53,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:14:53,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:53,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:14:53,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:53,318 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2023-01-27 23:14:53,318 INFO L131 PetriNetUnfolder]: For 617/617 co-relation queries the response was YES. [2023-01-27 23:14:53,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 695 event pairs, 24 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 920. Up to 113 conditions per place. [2023-01-27 23:14:53,320 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2023-01-27 23:14:53,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2023-01-27 23:14:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:14:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:14:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 699 transitions. [2023-01-27 23:14:53,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028818443804035 [2023-01-27 23:14:53,322 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 699 transitions. [2023-01-27 23:14:53,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 699 transitions. [2023-01-27 23:14:53,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:53,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 699 transitions. [2023-01-27 23:14:53,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,327 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,327 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 699 transitions. [2023-01-27 23:14:53,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2023-01-27 23:14:53,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-01-27 23:14:53,330 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2023-01-27 23:14:53,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-01-27 23:14:53,332 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-01-27 23:14:53,332 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2023-01-27 23:14:53,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:53,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:53,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 23:14:53,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:53,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash -263674133, now seen corresponding path program 6 times [2023-01-27 23:14:53,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:53,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789868337] [2023-01-27 23:14:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:53,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:53,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:53,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789868337] [2023-01-27 23:14:53,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789868337] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:14:53,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:14:53,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 23:14:53,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555790769] [2023-01-27 23:14:53,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:14:53,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 23:14:53,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 23:14:53,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 23:14:53,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:14:53,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:53,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:14:53,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:53,530 INFO L130 PetriNetUnfolder]: 115/206 cut-off events. [2023-01-27 23:14:53,530 INFO L131 PetriNetUnfolder]: For 770/770 co-relation queries the response was YES. [2023-01-27 23:14:53,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 627 event pairs, 35 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 884. Up to 160 conditions per place. [2023-01-27 23:14:53,531 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2023-01-27 23:14:53,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2023-01-27 23:14:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:14:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:14:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 695 transitions. [2023-01-27 23:14:53,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40057636887608067 [2023-01-27 23:14:53,533 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 695 transitions. [2023-01-27 23:14:53,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 695 transitions. [2023-01-27 23:14:53,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:53,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 695 transitions. [2023-01-27 23:14:53,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,537 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,537 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 695 transitions. [2023-01-27 23:14:53,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2023-01-27 23:14:53,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-27 23:14:53,540 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2023-01-27 23:14:53,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-01-27 23:14:53,540 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-01-27 23:14:53,540 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2023-01-27 23:14:53,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:53,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:53,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:53,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 23:14:53,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:53,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:53,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1171572305, now seen corresponding path program 1 times [2023-01-27 23:14:53,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:53,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083437598] [2023-01-27 23:14:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:53,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:53,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:53,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083437598] [2023-01-27 23:14:53,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083437598] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:14:53,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133938023] [2023-01-27 23:14:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:53,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:53,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:53,830 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 23:14:53,837 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 23:14:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:53,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 23:14:53,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:14:54,126 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 85 treesize of output 77 [2023-01-27 23:14:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:54,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:14:54,488 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:14:54,489 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 19 treesize of output 7 [2023-01-27 23:14:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:54,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133938023] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:14:54,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:14:54,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-01-27 23:14:54,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828075802] [2023-01-27 23:14:54,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:14:54,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 23:14:54,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:54,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 23:14:54,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-01-27 23:14:54,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 347 [2023-01-27 23:14:54,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 12 states, 12 states have (on average 107.33333333333333) internal successors, (1288), 12 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:54,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:54,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 347 [2023-01-27 23:14:54,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:54,935 INFO L130 PetriNetUnfolder]: 236/417 cut-off events. [2023-01-27 23:14:54,935 INFO L131 PetriNetUnfolder]: For 1346/1346 co-relation queries the response was YES. [2023-01-27 23:14:54,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 417 events. 236/417 cut-off events. For 1346/1346 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1633 event pairs, 10 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1719. Up to 113 conditions per place. [2023-01-27 23:14:54,938 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 68 selfloop transitions, 53 changer transitions 4/125 dead transitions. [2023-01-27 23:14:54,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 125 transitions, 995 flow [2023-01-27 23:14:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 23:14:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 23:14:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1467 transitions. [2023-01-27 23:14:54,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32520505431168256 [2023-01-27 23:14:54,942 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1467 transitions. [2023-01-27 23:14:54,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1467 transitions. [2023-01-27 23:14:54,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:54,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1467 transitions. [2023-01-27 23:14:54,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 112.84615384615384) internal successors, (1467), 13 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:54,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:54,951 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:54,951 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 13 states and 1467 transitions. [2023-01-27 23:14:54,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 125 transitions, 995 flow [2023-01-27 23:14:54,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 125 transitions, 933 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-01-27 23:14:54,957 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 676 flow [2023-01-27 23:14:54,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=676, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2023-01-27 23:14:54,958 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2023-01-27 23:14:54,958 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 676 flow [2023-01-27 23:14:54,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 107.33333333333333) internal successors, (1288), 12 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:54,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:54,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:54,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 23:14:55,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:55,164 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:55,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:55,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1460222474, now seen corresponding path program 1 times [2023-01-27 23:14:55,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:55,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266630158] [2023-01-27 23:14:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:55,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:55,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:55,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266630158] [2023-01-27 23:14:55,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266630158] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:14:55,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280565862] [2023-01-27 23:14:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:55,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:55,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:55,336 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 23:14:55,364 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 23:14:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:55,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 23:14:55,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:14:55,793 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-01-27 23:14:55,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 115 [2023-01-27 23:14:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:14:55,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:14:56,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:14:56,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 74 [2023-01-27 23:14:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:14:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280565862] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:14:56,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:14:56,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 21 [2023-01-27 23:14:56,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902972300] [2023-01-27 23:14:56,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:14:56,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 23:14:56,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:56,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 23:14:56,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-01-27 23:14:56,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 347 [2023-01-27 23:14:56,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 676 flow. Second operand has 21 states, 21 states have (on average 82.28571428571429) internal successors, (1728), 21 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:56,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:56,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 347 [2023-01-27 23:14:56,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:57,271 INFO L130 PetriNetUnfolder]: 375/684 cut-off events. [2023-01-27 23:14:57,271 INFO L131 PetriNetUnfolder]: For 2569/2569 co-relation queries the response was YES. [2023-01-27 23:14:57,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 684 events. 375/684 cut-off events. For 2569/2569 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3166 event pairs, 37 based on Foata normal form. 5/631 useless extension candidates. Maximal degree in co-relation 3069. Up to 232 conditions per place. [2023-01-27 23:14:57,276 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 76 selfloop transitions, 56 changer transitions 56/188 dead transitions. [2023-01-27 23:14:57,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 188 transitions, 1790 flow [2023-01-27 23:14:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 23:14:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 23:14:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1894 transitions. [2023-01-27 23:14:57,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24810060256746136 [2023-01-27 23:14:57,281 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1894 transitions. [2023-01-27 23:14:57,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1894 transitions. [2023-01-27 23:14:57,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:57,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1894 transitions. [2023-01-27 23:14:57,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.0909090909091) internal successors, (1894), 22 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:57,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 347.0) internal successors, (7981), 23 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:57,292 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 347.0) internal successors, (7981), 23 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:57,292 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 676 flow. Second operand 22 states and 1894 transitions. [2023-01-27 23:14:57,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 188 transitions, 1790 flow [2023-01-27 23:14:57,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 188 transitions, 1618 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-01-27 23:14:57,303 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 924 flow [2023-01-27 23:14:57,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=924, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2023-01-27 23:14:57,303 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-01-27 23:14:57,303 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 924 flow [2023-01-27 23:14:57,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 82.28571428571429) internal successors, (1728), 21 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:57,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:57,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:57,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 23:14:57,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-01-27 23:14:57,509 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:57,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash -990791569, now seen corresponding path program 2 times [2023-01-27 23:14:57,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:57,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663808085] [2023-01-27 23:14:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:57,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:57,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:57,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663808085] [2023-01-27 23:14:57,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663808085] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:14:57,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295185494] [2023-01-27 23:14:57,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:14:57,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:57,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:57,717 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 23:14:57,719 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 23:14:57,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:14:57,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:14:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 23:14:57,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:14:57,975 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 85 treesize of output 77 [2023-01-27 23:14:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:57,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:14:58,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:14:58,262 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 68 treesize of output 53 [2023-01-27 23:14:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:58,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295185494] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:14:58,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:14:58,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-01-27 23:14:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124514202] [2023-01-27 23:14:58,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:14:58,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 23:14:58,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 23:14:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-27 23:14:58,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 347 [2023-01-27 23:14:58,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 924 flow. Second operand has 12 states, 12 states have (on average 107.5) internal successors, (1290), 12 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:58,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:58,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 347 [2023-01-27 23:14:58,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:14:58,759 INFO L130 PetriNetUnfolder]: 323/577 cut-off events. [2023-01-27 23:14:58,759 INFO L131 PetriNetUnfolder]: For 2303/2303 co-relation queries the response was YES. [2023-01-27 23:14:58,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2739 conditions, 577 events. 323/577 cut-off events. For 2303/2303 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2495 event pairs, 5 based on Foata normal form. 2/577 useless extension candidates. Maximal degree in co-relation 2679. Up to 239 conditions per place. [2023-01-27 23:14:58,766 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 69 selfloop transitions, 74 changer transitions 4/147 dead transitions. [2023-01-27 23:14:58,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1488 flow [2023-01-27 23:14:58,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 23:14:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 23:14:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1456 transitions. [2023-01-27 23:14:58,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3227665706051873 [2023-01-27 23:14:58,769 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1456 transitions. [2023-01-27 23:14:58,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1456 transitions. [2023-01-27 23:14:58,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:14:58,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1456 transitions. [2023-01-27 23:14:58,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 112.0) internal successors, (1456), 13 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:58,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:58,777 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:58,777 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 924 flow. Second operand 13 states and 1456 transitions. [2023-01-27 23:14:58,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1488 flow [2023-01-27 23:14:58,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 147 transitions, 1364 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-01-27 23:14:58,787 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 1211 flow [2023-01-27 23:14:58,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1211, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2023-01-27 23:14:58,787 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-01-27 23:14:58,788 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 1211 flow [2023-01-27 23:14:58,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 107.5) internal successors, (1290), 12 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:58,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:14:58,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:14:58,795 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 23:14:58,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:58,994 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:14:58,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:14:58,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1059349345, now seen corresponding path program 3 times [2023-01-27 23:14:58,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:14:58,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844453823] [2023-01-27 23:14:58,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:14:58,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:14:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:14:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:59,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:14:59,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844453823] [2023-01-27 23:14:59,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844453823] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:14:59,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390435681] [2023-01-27 23:14:59,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:14:59,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:14:59,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:14:59,197 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 23:14:59,199 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 23:14:59,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:14:59,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:14:59,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 23:14:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:14:59,394 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 15 treesize of output 7 [2023-01-27 23:14:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:59,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:14:59,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:14:59,544 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 128 [2023-01-27 23:14:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:14:59,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390435681] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:14:59,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:14:59,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-01-27 23:14:59,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338139579] [2023-01-27 23:14:59,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:14:59,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 23:14:59,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:14:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 23:14:59,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-01-27 23:14:59,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 347 [2023-01-27 23:14:59,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 1211 flow. Second operand has 14 states, 14 states have (on average 107.21428571428571) internal successors, (1501), 14 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:14:59,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:14:59,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 347 [2023-01-27 23:14:59,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:00,021 INFO L130 PetriNetUnfolder]: 389/752 cut-off events. [2023-01-27 23:15:00,021 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-01-27 23:15:00,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3652 conditions, 752 events. 389/752 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3828 event pairs, 4 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 3548. Up to 216 conditions per place. [2023-01-27 23:15:00,026 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 82 selfloop transitions, 102 changer transitions 20/204 dead transitions. [2023-01-27 23:15:00,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 204 transitions, 2264 flow [2023-01-27 23:15:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 23:15:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 23:15:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1895 transitions. [2023-01-27 23:15:00,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3212408882861502 [2023-01-27 23:15:00,030 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1895 transitions. [2023-01-27 23:15:00,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1895 transitions. [2023-01-27 23:15:00,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:00,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1895 transitions. [2023-01-27 23:15:00,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 111.47058823529412) internal successors, (1895), 17 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:00,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:00,051 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:00,051 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 1211 flow. Second operand 17 states and 1895 transitions. [2023-01-27 23:15:00,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 204 transitions, 2264 flow [2023-01-27 23:15:00,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 204 transitions, 2120 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-01-27 23:15:00,068 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1713 flow [2023-01-27 23:15:00,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1713, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2023-01-27 23:15:00,069 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2023-01-27 23:15:00,069 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1713 flow [2023-01-27 23:15:00,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 107.21428571428571) internal successors, (1501), 14 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:00,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:00,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:00,078 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 23:15:00,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:00,277 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:00,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:00,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1724646899, now seen corresponding path program 4 times [2023-01-27 23:15:00,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:00,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868388008] [2023-01-27 23:15:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:00,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:15:00,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:00,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868388008] [2023-01-27 23:15:00,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868388008] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:00,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911040704] [2023-01-27 23:15:00,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:15:00,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:00,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:00,514 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 23:15:00,515 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 23:15:00,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:15:00,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:00,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-27 23:15:00,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:00,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:15:00,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:15:00,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:15:00,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 23:15:00,769 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 85 treesize of output 77 [2023-01-27 23:15:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:00,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:01,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:01,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2023-01-27 23:15:01,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:01,100 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 414 treesize of output 326 [2023-01-27 23:15:01,104 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 72 treesize of output 60 [2023-01-27 23:15:01,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:01,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-01-27 23:15:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:01,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911040704] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:01,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:01,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-01-27 23:15:01,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262769173] [2023-01-27 23:15:01,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:01,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 23:15:01,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 23:15:01,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=336, Unknown=2, NotChecked=0, Total=420 [2023-01-27 23:15:01,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 347 [2023-01-27 23:15:01,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1713 flow. Second operand has 21 states, 21 states have (on average 94.66666666666667) internal successors, (1988), 21 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:01,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:01,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 347 [2023-01-27 23:15:01,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:03,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:15:04,106 INFO L130 PetriNetUnfolder]: 476/919 cut-off events. [2023-01-27 23:15:04,106 INFO L131 PetriNetUnfolder]: For 5228/5228 co-relation queries the response was YES. [2023-01-27 23:15:04,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 919 events. 476/919 cut-off events. For 5228/5228 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4923 event pairs, 11 based on Foata normal form. 4/922 useless extension candidates. Maximal degree in co-relation 4900. Up to 213 conditions per place. [2023-01-27 23:15:04,112 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 97 selfloop transitions, 139 changer transitions 10/246 dead transitions. [2023-01-27 23:15:04,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 246 transitions, 3021 flow [2023-01-27 23:15:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 23:15:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 23:15:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1797 transitions. [2023-01-27 23:15:04,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2877041306436119 [2023-01-27 23:15:04,116 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1797 transitions. [2023-01-27 23:15:04,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1797 transitions. [2023-01-27 23:15:04,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:04,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1797 transitions. [2023-01-27 23:15:04,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 99.83333333333333) internal successors, (1797), 18 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:04,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:04,124 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:04,124 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1713 flow. Second operand 18 states and 1797 transitions. [2023-01-27 23:15:04,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 246 transitions, 3021 flow [2023-01-27 23:15:04,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 246 transitions, 2776 flow, removed 62 selfloop flow, removed 12 redundant places. [2023-01-27 23:15:04,152 INFO L231 Difference]: Finished difference. Result has 114 places, 181 transitions, 2454 flow [2023-01-27 23:15:04,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2454, PETRI_PLACES=114, PETRI_TRANSITIONS=181} [2023-01-27 23:15:04,152 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2023-01-27 23:15:04,153 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 181 transitions, 2454 flow [2023-01-27 23:15:04,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 94.66666666666667) internal successors, (1988), 21 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:04,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:04,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:04,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-27 23:15:04,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-27 23:15:04,358 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:04,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:04,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1294223865, now seen corresponding path program 5 times [2023-01-27 23:15:04,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:04,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720849649] [2023-01-27 23:15:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:04,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:15:04,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:04,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720849649] [2023-01-27 23:15:04,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720849649] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:04,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348723909] [2023-01-27 23:15:04,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:15:04,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:04,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:04,593 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 23:15:04,620 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 23:15:04,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:15:04,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:04,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-27 23:15:04,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:04,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:15:04,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:15:04,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:15:04,869 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 85 treesize of output 77 [2023-01-27 23:15:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:04,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:07,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:07,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-01-27 23:15:07,362 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:15:07,362 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 94 treesize of output 81 [2023-01-27 23:15:07,368 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 23:15:07,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2023-01-27 23:15:07,376 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 23:15:07,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2023-01-27 23:15:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:07,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348723909] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:07,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:07,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2023-01-27 23:15:07,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522525871] [2023-01-27 23:15:07,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:07,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:15:07,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:07,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:15:07,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=213, Unknown=5, NotChecked=0, Total=306 [2023-01-27 23:15:07,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 347 [2023-01-27 23:15:07,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 181 transitions, 2454 flow. Second operand has 18 states, 18 states have (on average 94.94444444444444) internal successors, (1709), 18 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:07,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:07,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 347 [2023-01-27 23:15:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:08,126 INFO L130 PetriNetUnfolder]: 528/1033 cut-off events. [2023-01-27 23:15:08,127 INFO L131 PetriNetUnfolder]: For 7788/7788 co-relation queries the response was YES. [2023-01-27 23:15:08,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6009 conditions, 1033 events. 528/1033 cut-off events. For 7788/7788 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5706 event pairs, 73 based on Foata normal form. 6/1038 useless extension candidates. Maximal degree in co-relation 5733. Up to 792 conditions per place. [2023-01-27 23:15:08,133 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 174 selfloop transitions, 55 changer transitions 11/240 dead transitions. [2023-01-27 23:15:08,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 240 transitions, 3429 flow [2023-01-27 23:15:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 23:15:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 23:15:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1196 transitions. [2023-01-27 23:15:08,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.287223823246878 [2023-01-27 23:15:08,136 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1196 transitions. [2023-01-27 23:15:08,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1196 transitions. [2023-01-27 23:15:08,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:08,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1196 transitions. [2023-01-27 23:15:08,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.66666666666667) internal successors, (1196), 12 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:08,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:08,143 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:08,143 INFO L175 Difference]: Start difference. First operand has 114 places, 181 transitions, 2454 flow. Second operand 12 states and 1196 transitions. [2023-01-27 23:15:08,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 240 transitions, 3429 flow [2023-01-27 23:15:08,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 240 transitions, 3362 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-01-27 23:15:08,178 INFO L231 Difference]: Finished difference. Result has 126 places, 201 transitions, 2896 flow [2023-01-27 23:15:08,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2896, PETRI_PLACES=126, PETRI_TRANSITIONS=201} [2023-01-27 23:15:08,179 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-01-27 23:15:08,179 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 201 transitions, 2896 flow [2023-01-27 23:15:08,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.94444444444444) internal successors, (1709), 18 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:08,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:08,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:08,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-27 23:15:08,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:08,387 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:08,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:08,387 INFO L85 PathProgramCache]: Analyzing trace with hash -469526207, now seen corresponding path program 2 times [2023-01-27 23:15:08,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:08,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202162968] [2023-01-27 23:15:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:08,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:08,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:08,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202162968] [2023-01-27 23:15:08,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202162968] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:08,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059815400] [2023-01-27 23:15:08,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:15:08,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:08,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:08,485 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 23:15:08,487 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 23:15:08,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:15:08,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:08,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 23:15:08,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:08,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:08,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059815400] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:08,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:08,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-01-27 23:15:08,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463088362] [2023-01-27 23:15:08,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:08,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 23:15:08,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:08,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 23:15:08,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-01-27 23:15:08,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:15:08,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 201 transitions, 2896 flow. Second operand has 11 states, 11 states have (on average 134.45454545454547) internal successors, (1479), 11 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:08,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:08,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:15:08,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:09,466 INFO L130 PetriNetUnfolder]: 605/1185 cut-off events. [2023-01-27 23:15:09,466 INFO L131 PetriNetUnfolder]: For 8838/8838 co-relation queries the response was YES. [2023-01-27 23:15:09,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 1185 events. 605/1185 cut-off events. For 8838/8838 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6884 event pairs, 70 based on Foata normal form. 28/1212 useless extension candidates. Maximal degree in co-relation 6674. Up to 357 conditions per place. [2023-01-27 23:15:09,474 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 182 selfloop transitions, 119 changer transitions 1/302 dead transitions. [2023-01-27 23:15:09,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 302 transitions, 4219 flow [2023-01-27 23:15:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 23:15:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 23:15:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2357 transitions. [2023-01-27 23:15:09,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39955924733005593 [2023-01-27 23:15:09,478 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2357 transitions. [2023-01-27 23:15:09,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2357 transitions. [2023-01-27 23:15:09,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:09,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2357 transitions. [2023-01-27 23:15:09,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 138.64705882352942) internal successors, (2357), 17 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:09,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:09,485 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:09,485 INFO L175 Difference]: Start difference. First operand has 126 places, 201 transitions, 2896 flow. Second operand 17 states and 2357 transitions. [2023-01-27 23:15:09,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 302 transitions, 4219 flow [2023-01-27 23:15:09,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 302 transitions, 4167 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-01-27 23:15:09,529 INFO L231 Difference]: Finished difference. Result has 146 places, 235 transitions, 3664 flow [2023-01-27 23:15:09,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3664, PETRI_PLACES=146, PETRI_TRANSITIONS=235} [2023-01-27 23:15:09,530 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-01-27 23:15:09,530 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 235 transitions, 3664 flow [2023-01-27 23:15:09,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 134.45454545454547) internal successors, (1479), 11 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:09,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:09,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:09,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:09,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:09,736 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:09,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1106126361, now seen corresponding path program 3 times [2023-01-27 23:15:09,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:09,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691180543] [2023-01-27 23:15:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:09,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:09,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:09,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691180543] [2023-01-27 23:15:09,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691180543] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:09,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77430554] [2023-01-27 23:15:09,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:15:09,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:09,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:09,872 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 23:15:09,874 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 23:15:09,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:15:09,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 23:15:09,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:10,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:10,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77430554] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:10,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:10,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 23:15:10,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789375668] [2023-01-27 23:15:10,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:10,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 23:15:10,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:10,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 23:15:10,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-01-27 23:15:10,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:15:10,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 235 transitions, 3664 flow. Second operand has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:10,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:10,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:15:10,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:10,832 INFO L130 PetriNetUnfolder]: 700/1350 cut-off events. [2023-01-27 23:15:10,832 INFO L131 PetriNetUnfolder]: For 12122/12122 co-relation queries the response was YES. [2023-01-27 23:15:10,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8675 conditions, 1350 events. 700/1350 cut-off events. For 12122/12122 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7922 event pairs, 124 based on Foata normal form. 12/1361 useless extension candidates. Maximal degree in co-relation 8400. Up to 625 conditions per place. [2023-01-27 23:15:10,842 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 211 selfloop transitions, 115 changer transitions 1/327 dead transitions. [2023-01-27 23:15:10,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 327 transitions, 5104 flow [2023-01-27 23:15:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 23:15:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 23:15:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2094 transitions. [2023-01-27 23:15:10,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023054755043228 [2023-01-27 23:15:10,845 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2094 transitions. [2023-01-27 23:15:10,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2094 transitions. [2023-01-27 23:15:10,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:10,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2094 transitions. [2023-01-27 23:15:10,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 139.6) internal successors, (2094), 15 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:10,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:10,852 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:10,852 INFO L175 Difference]: Start difference. First operand has 146 places, 235 transitions, 3664 flow. Second operand 15 states and 2094 transitions. [2023-01-27 23:15:10,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 327 transitions, 5104 flow [2023-01-27 23:15:10,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 327 transitions, 4961 flow, removed 51 selfloop flow, removed 5 redundant places. [2023-01-27 23:15:10,918 INFO L231 Difference]: Finished difference. Result has 163 places, 264 transitions, 4366 flow [2023-01-27 23:15:10,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4366, PETRI_PLACES=163, PETRI_TRANSITIONS=264} [2023-01-27 23:15:10,919 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-01-27 23:15:10,919 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 264 transitions, 4366 flow [2023-01-27 23:15:10,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:10,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:10,920 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:10,932 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 23:15:11,128 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,SelfDestructingSolverStorable14 [2023-01-27 23:15:11,129 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:11,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:11,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1138105375, now seen corresponding path program 4 times [2023-01-27 23:15:11,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:11,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718808423] [2023-01-27 23:15:11,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:11,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718808423] [2023-01-27 23:15:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718808423] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31426479] [2023-01-27 23:15:11,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:15:11,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:11,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:11,299 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 23:15:11,301 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 23:15:11,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:15:11,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:11,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 23:15:11,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:11,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:11,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31426479] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:11,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:11,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 23:15:11,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314051576] [2023-01-27 23:15:11,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:11,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 23:15:11,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 23:15:11,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-01-27 23:15:11,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:15:11,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 264 transitions, 4366 flow. Second operand has 12 states, 12 states have (on average 134.33333333333334) internal successors, (1612), 12 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:11,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:11,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:15:11,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:12,280 INFO L130 PetriNetUnfolder]: 679/1327 cut-off events. [2023-01-27 23:15:12,281 INFO L131 PetriNetUnfolder]: For 14282/14282 co-relation queries the response was YES. [2023-01-27 23:15:12,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 1327 events. 679/1327 cut-off events. For 14282/14282 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7894 event pairs, 120 based on Foata normal form. 28/1354 useless extension candidates. Maximal degree in co-relation 8784. Up to 629 conditions per place. [2023-01-27 23:15:12,295 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 214 selfloop transitions, 109 changer transitions 1/324 dead transitions. [2023-01-27 23:15:12,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 324 transitions, 5258 flow [2023-01-27 23:15:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 23:15:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 23:15:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2360 transitions. [2023-01-27 23:15:12,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4000678081030683 [2023-01-27 23:15:12,299 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2360 transitions. [2023-01-27 23:15:12,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2360 transitions. [2023-01-27 23:15:12,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:12,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2360 transitions. [2023-01-27 23:15:12,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 138.8235294117647) internal successors, (2360), 17 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:12,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:12,306 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:12,306 INFO L175 Difference]: Start difference. First operand has 163 places, 264 transitions, 4366 flow. Second operand 17 states and 2360 transitions. [2023-01-27 23:15:12,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 324 transitions, 5258 flow [2023-01-27 23:15:12,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 324 transitions, 5142 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-01-27 23:15:12,378 INFO L231 Difference]: Finished difference. Result has 177 places, 263 transitions, 4443 flow [2023-01-27 23:15:12,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4443, PETRI_PLACES=177, PETRI_TRANSITIONS=263} [2023-01-27 23:15:12,379 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-01-27 23:15:12,379 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 263 transitions, 4443 flow [2023-01-27 23:15:12,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.33333333333334) internal successors, (1612), 12 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:12,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:12,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:12,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:12,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 23:15:12,581 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:12,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1907636203, now seen corresponding path program 5 times [2023-01-27 23:15:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:12,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498680113] [2023-01-27 23:15:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:12,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:12,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498680113] [2023-01-27 23:15:12,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498680113] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554013232] [2023-01-27 23:15:12,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:15:12,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:12,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:12,704 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:12,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 23:15:12,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:15:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 23:15:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:12,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:12,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554013232] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:12,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:12,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-01-27 23:15:12,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942754987] [2023-01-27 23:15:12,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:12,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 23:15:12,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 23:15:12,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-01-27 23:15:12,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:15:12,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 263 transitions, 4443 flow. Second operand has 11 states, 11 states have (on average 134.45454545454547) internal successors, (1479), 11 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:12,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:12,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:15:12,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:13,342 INFO L130 PetriNetUnfolder]: 763/1475 cut-off events. [2023-01-27 23:15:13,342 INFO L131 PetriNetUnfolder]: For 15441/15441 co-relation queries the response was YES. [2023-01-27 23:15:13,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10115 conditions, 1475 events. 763/1475 cut-off events. For 15441/15441 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8873 event pairs, 102 based on Foata normal form. 12/1486 useless extension candidates. Maximal degree in co-relation 9914. Up to 714 conditions per place. [2023-01-27 23:15:13,351 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 189 selfloop transitions, 133 changer transitions 0/322 dead transitions. [2023-01-27 23:15:13,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 322 transitions, 5667 flow [2023-01-27 23:15:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 23:15:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 23:15:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1522 transitions. [2023-01-27 23:15:13,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398742467906733 [2023-01-27 23:15:13,353 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1522 transitions. [2023-01-27 23:15:13,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1522 transitions. [2023-01-27 23:15:13,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:13,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1522 transitions. [2023-01-27 23:15:13,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 138.36363636363637) internal successors, (1522), 11 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:13,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:13,357 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:13,357 INFO L175 Difference]: Start difference. First operand has 177 places, 263 transitions, 4443 flow. Second operand 11 states and 1522 transitions. [2023-01-27 23:15:13,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 322 transitions, 5667 flow [2023-01-27 23:15:13,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 322 transitions, 5553 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-01-27 23:15:13,432 INFO L231 Difference]: Finished difference. Result has 183 places, 284 transitions, 5098 flow [2023-01-27 23:15:13,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5098, PETRI_PLACES=183, PETRI_TRANSITIONS=284} [2023-01-27 23:15:13,432 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2023-01-27 23:15:13,432 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 284 transitions, 5098 flow [2023-01-27 23:15:13,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 134.45454545454547) internal successors, (1479), 11 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:13,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:13,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:13,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:13,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 23:15:13,638 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:13,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:13,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1697963331, now seen corresponding path program 6 times [2023-01-27 23:15:13,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:13,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735834561] [2023-01-27 23:15:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:13,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:13,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735834561] [2023-01-27 23:15:13,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735834561] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270732869] [2023-01-27 23:15:13,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:15:13,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:13,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:13,782 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:13,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 23:15:13,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 23:15:13,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:13,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 23:15:13,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:13,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:14,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270732869] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:14,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:14,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 23:15:14,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674033569] [2023-01-27 23:15:14,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:14,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 23:15:14,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:14,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 23:15:14,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-27 23:15:14,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:15:14,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 284 transitions, 5098 flow. Second operand has 13 states, 13 states have (on average 134.07692307692307) internal successors, (1743), 13 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:14,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:14,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:15:14,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:14,974 INFO L130 PetriNetUnfolder]: 1108/2170 cut-off events. [2023-01-27 23:15:14,974 INFO L131 PetriNetUnfolder]: For 28091/28091 co-relation queries the response was YES. [2023-01-27 23:15:14,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15541 conditions, 2170 events. 1108/2170 cut-off events. For 28091/28091 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14201 event pairs, 45 based on Foata normal form. 16/2185 useless extension candidates. Maximal degree in co-relation 15275. Up to 545 conditions per place. [2023-01-27 23:15:14,990 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 248 selfloop transitions, 245 changer transitions 0/493 dead transitions. [2023-01-27 23:15:14,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 493 transitions, 8920 flow [2023-01-27 23:15:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 23:15:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 23:15:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2650 transitions. [2023-01-27 23:15:14,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019414530562718 [2023-01-27 23:15:14,992 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2650 transitions. [2023-01-27 23:15:14,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2650 transitions. [2023-01-27 23:15:14,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:14,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2650 transitions. [2023-01-27 23:15:14,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 139.47368421052633) internal successors, (2650), 19 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:14,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:14,998 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:14,999 INFO L175 Difference]: Start difference. First operand has 183 places, 284 transitions, 5098 flow. Second operand 19 states and 2650 transitions. [2023-01-27 23:15:14,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 493 transitions, 8920 flow [2023-01-27 23:15:15,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 493 transitions, 8630 flow, removed 63 selfloop flow, removed 5 redundant places. [2023-01-27 23:15:15,131 INFO L231 Difference]: Finished difference. Result has 206 places, 383 transitions, 7499 flow [2023-01-27 23:15:15,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7499, PETRI_PLACES=206, PETRI_TRANSITIONS=383} [2023-01-27 23:15:15,131 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2023-01-27 23:15:15,131 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 383 transitions, 7499 flow [2023-01-27 23:15:15,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 134.07692307692307) internal successors, (1743), 13 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:15,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:15,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:15,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:15,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 23:15:15,336 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:15,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash 625542995, now seen corresponding path program 7 times [2023-01-27 23:15:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:15,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84392347] [2023-01-27 23:15:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:15,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:15,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84392347] [2023-01-27 23:15:15,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84392347] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973374420] [2023-01-27 23:15:15,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:15:15,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:15,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:15,491 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:15,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 23:15:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:15,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 23:15:15,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:15,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:15,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973374420] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:15,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:15,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 23:15:15,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675772263] [2023-01-27 23:15:15,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:15,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 23:15:15,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:15,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 23:15:15,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-01-27 23:15:15,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:15:15,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 383 transitions, 7499 flow. Second operand has 13 states, 13 states have (on average 134.23076923076923) internal successors, (1745), 13 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:15,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:15,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:15:15,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:16,604 INFO L130 PetriNetUnfolder]: 1126/2204 cut-off events. [2023-01-27 23:15:16,605 INFO L131 PetriNetUnfolder]: For 36261/36261 co-relation queries the response was YES. [2023-01-27 23:15:16,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 2204 events. 1126/2204 cut-off events. For 36261/36261 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14381 event pairs, 55 based on Foata normal form. 12/2215 useless extension candidates. Maximal degree in co-relation 16860. Up to 597 conditions per place. [2023-01-27 23:15:16,621 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 225 selfloop transitions, 248 changer transitions 0/473 dead transitions. [2023-01-27 23:15:16,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 473 transitions, 9358 flow [2023-01-27 23:15:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 23:15:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 23:15:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2626 transitions. [2023-01-27 23:15:16,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39830122857576217 [2023-01-27 23:15:16,624 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2626 transitions. [2023-01-27 23:15:16,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2626 transitions. [2023-01-27 23:15:16,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:16,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2626 transitions. [2023-01-27 23:15:16,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 138.21052631578948) internal successors, (2626), 19 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:16,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:16,630 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:16,630 INFO L175 Difference]: Start difference. First operand has 206 places, 383 transitions, 7499 flow. Second operand 19 states and 2626 transitions. [2023-01-27 23:15:16,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 473 transitions, 9358 flow [2023-01-27 23:15:16,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 473 transitions, 9004 flow, removed 90 selfloop flow, removed 4 redundant places. [2023-01-27 23:15:16,804 INFO L231 Difference]: Finished difference. Result has 226 places, 392 transitions, 8009 flow [2023-01-27 23:15:16,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=7103, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8009, PETRI_PLACES=226, PETRI_TRANSITIONS=392} [2023-01-27 23:15:16,805 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-01-27 23:15:16,805 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 392 transitions, 8009 flow [2023-01-27 23:15:16,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 134.23076923076923) internal successors, (1745), 13 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:16,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:16,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:16,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:17,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:17,010 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:17,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1892416347, now seen corresponding path program 8 times [2023-01-27 23:15:17,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:17,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583613865] [2023-01-27 23:15:17,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:17,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:17,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583613865] [2023-01-27 23:15:17,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583613865] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328877380] [2023-01-27 23:15:17,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:15:17,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:17,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:17,163 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:17,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 23:15:17,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:15:17,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:17,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 23:15:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:17,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:17,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328877380] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:17,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:17,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 23:15:17,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700042812] [2023-01-27 23:15:17,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:17,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 23:15:17,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:17,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 23:15:17,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-01-27 23:15:17,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:15:17,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 392 transitions, 8009 flow. Second operand has 12 states, 12 states have (on average 134.33333333333334) internal successors, (1612), 12 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:17,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:17,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:15:17,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:18,281 INFO L130 PetriNetUnfolder]: 1189/2331 cut-off events. [2023-01-27 23:15:18,281 INFO L131 PetriNetUnfolder]: For 42784/42784 co-relation queries the response was YES. [2023-01-27 23:15:18,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18687 conditions, 2331 events. 1189/2331 cut-off events. For 42784/42784 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15406 event pairs, 216 based on Foata normal form. 24/2354 useless extension candidates. Maximal degree in co-relation 18376. Up to 1366 conditions per place. [2023-01-27 23:15:18,298 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 296 selfloop transitions, 186 changer transitions 2/484 dead transitions. [2023-01-27 23:15:18,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 484 transitions, 10028 flow [2023-01-27 23:15:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 23:15:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 23:15:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2218 transitions. [2023-01-27 23:15:18,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994956772334294 [2023-01-27 23:15:18,301 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2218 transitions. [2023-01-27 23:15:18,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2218 transitions. [2023-01-27 23:15:18,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:18,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2218 transitions. [2023-01-27 23:15:18,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 138.625) internal successors, (2218), 16 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:18,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 347.0) internal successors, (5899), 17 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:18,306 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 347.0) internal successors, (5899), 17 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:18,306 INFO L175 Difference]: Start difference. First operand has 226 places, 392 transitions, 8009 flow. Second operand 16 states and 2218 transitions. [2023-01-27 23:15:18,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 484 transitions, 10028 flow [2023-01-27 23:15:18,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 484 transitions, 9795 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-01-27 23:15:18,492 INFO L231 Difference]: Finished difference. Result has 238 places, 421 transitions, 9012 flow [2023-01-27 23:15:18,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=7684, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9012, PETRI_PLACES=238, PETRI_TRANSITIONS=421} [2023-01-27 23:15:18,493 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 217 predicate places. [2023-01-27 23:15:18,493 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 421 transitions, 9012 flow [2023-01-27 23:15:18,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.33333333333334) internal successors, (1612), 12 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:18,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:18,493 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:18,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:18,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-01-27 23:15:18,698 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:18,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:18,699 INFO L85 PathProgramCache]: Analyzing trace with hash 158319213, now seen corresponding path program 9 times [2023-01-27 23:15:18,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:18,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422260624] [2023-01-27 23:15:18,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:18,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:18,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:18,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422260624] [2023-01-27 23:15:18,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422260624] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:18,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958778995] [2023-01-27 23:15:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:15:18,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:18,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:18,815 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:18,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 23:15:18,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:15:18,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:18,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 23:15:18,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:18,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:19,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958778995] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:19,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:19,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 23:15:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086076085] [2023-01-27 23:15:19,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:19,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 23:15:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:19,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 23:15:19,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-01-27 23:15:19,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:15:19,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 421 transitions, 9012 flow. Second operand has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:19,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:19,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:15:19,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:19,913 INFO L130 PetriNetUnfolder]: 1196/2314 cut-off events. [2023-01-27 23:15:19,913 INFO L131 PetriNetUnfolder]: For 46147/46147 co-relation queries the response was YES. [2023-01-27 23:15:19,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19529 conditions, 2314 events. 1196/2314 cut-off events. For 46147/46147 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15011 event pairs, 216 based on Foata normal form. 22/2335 useless extension candidates. Maximal degree in co-relation 19267. Up to 1376 conditions per place. [2023-01-27 23:15:19,928 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 291 selfloop transitions, 185 changer transitions 2/478 dead transitions. [2023-01-27 23:15:19,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 478 transitions, 10462 flow [2023-01-27 23:15:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 23:15:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 23:15:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1944 transitions. [2023-01-27 23:15:19,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40016467682173734 [2023-01-27 23:15:19,930 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1944 transitions. [2023-01-27 23:15:19,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1944 transitions. [2023-01-27 23:15:19,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:19,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1944 transitions. [2023-01-27 23:15:19,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 138.85714285714286) internal successors, (1944), 14 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:19,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:19,934 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:19,934 INFO L175 Difference]: Start difference. First operand has 238 places, 421 transitions, 9012 flow. Second operand 14 states and 1944 transitions. [2023-01-27 23:15:19,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 478 transitions, 10462 flow [2023-01-27 23:15:20,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 478 transitions, 10314 flow, removed 53 selfloop flow, removed 6 redundant places. [2023-01-27 23:15:20,135 INFO L231 Difference]: Finished difference. Result has 246 places, 427 transitions, 9432 flow [2023-01-27 23:15:20,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8773, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9432, PETRI_PLACES=246, PETRI_TRANSITIONS=427} [2023-01-27 23:15:20,135 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-01-27 23:15:20,135 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 427 transitions, 9432 flow [2023-01-27 23:15:20,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:20,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:20,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:20,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:20,336 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:20,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash -789546511, now seen corresponding path program 10 times [2023-01-27 23:15:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:20,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8860920] [2023-01-27 23:15:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:20,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:20,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8860920] [2023-01-27 23:15:20,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8860920] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:20,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273640080] [2023-01-27 23:15:20,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:15:20,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:20,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:20,438 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:20,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 23:15:20,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:15:20,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 23:15:20,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:20,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:20,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273640080] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:20,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:20,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-27 23:15:20,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115115319] [2023-01-27 23:15:20,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:20,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 23:15:20,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 23:15:20,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-27 23:15:20,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:15:20,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 427 transitions, 9432 flow. Second operand has 13 states, 13 states have (on average 133.92307692307693) internal successors, (1741), 13 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:20,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:20,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:15:20,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:21,832 INFO L130 PetriNetUnfolder]: 1350/2640 cut-off events. [2023-01-27 23:15:21,832 INFO L131 PetriNetUnfolder]: For 54961/54961 co-relation queries the response was YES. [2023-01-27 23:15:21,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22726 conditions, 2640 events. 1350/2640 cut-off events. For 54961/54961 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17644 event pairs, 35 based on Foata normal form. 4/2643 useless extension candidates. Maximal degree in co-relation 22569. Up to 647 conditions per place. [2023-01-27 23:15:21,850 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 309 selfloop transitions, 253 changer transitions 0/562 dead transitions. [2023-01-27 23:15:21,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 562 transitions, 12551 flow [2023-01-27 23:15:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 23:15:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 23:15:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2505 transitions. [2023-01-27 23:15:21,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010566762728146 [2023-01-27 23:15:21,855 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2505 transitions. [2023-01-27 23:15:21,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2505 transitions. [2023-01-27 23:15:21,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:21,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2505 transitions. [2023-01-27 23:15:21,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 139.16666666666666) internal successors, (2505), 18 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:21,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:21,861 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:21,861 INFO L175 Difference]: Start difference. First operand has 246 places, 427 transitions, 9432 flow. Second operand 18 states and 2505 transitions. [2023-01-27 23:15:21,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 562 transitions, 12551 flow [2023-01-27 23:15:22,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 562 transitions, 12203 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-01-27 23:15:22,099 INFO L231 Difference]: Finished difference. Result has 253 places, 444 transitions, 10131 flow [2023-01-27 23:15:22,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10131, PETRI_PLACES=253, PETRI_TRANSITIONS=444} [2023-01-27 23:15:22,099 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2023-01-27 23:15:22,099 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 444 transitions, 10131 flow [2023-01-27 23:15:22,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 133.92307692307693) internal successors, (1741), 13 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:22,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:22,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:22,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:22,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:22,300 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:22,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash -212875034, now seen corresponding path program 1 times [2023-01-27 23:15:22,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:22,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127401803] [2023-01-27 23:15:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:22,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:15:22,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:22,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127401803] [2023-01-27 23:15:22,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127401803] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:22,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047607455] [2023-01-27 23:15:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:22,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:22,380 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:22,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 23:15:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:22,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-27 23:15:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:22,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:15:22,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:15:22,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:15:22,741 INFO L321 Elim1Store]: treesize reduction 23, result has 56.6 percent of original size [2023-01-27 23:15:22,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 151 [2023-01-27 23:15:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:22,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:23,003 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x2~0 Int) (v_ArrVal_631 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* ~x2~0 4))))) (or (< .cse0 0) (= (select .cse1 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse1 (+ (* 4 .cse0) c_~f~0.offset))) (<= c_~size~0 .cse0))))) is different from false [2023-01-27 23:15:23,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:23,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2023-01-27 23:15:23,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:23,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 254 treesize of output 254 [2023-01-27 23:15:23,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:23,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 194 [2023-01-27 23:15:23,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:23,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 101 [2023-01-27 23:15:23,470 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 23:15:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047607455] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:23,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:23,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-01-27 23:15:23,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454751135] [2023-01-27 23:15:23,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:23,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 23:15:23,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 23:15:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=255, Unknown=1, NotChecked=32, Total=342 [2023-01-27 23:15:23,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-01-27 23:15:23,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 444 transitions, 10131 flow. Second operand has 19 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:23,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:23,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-01-27 23:15:23,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:24,920 INFO L130 PetriNetUnfolder]: 1673/3401 cut-off events. [2023-01-27 23:15:24,921 INFO L131 PetriNetUnfolder]: For 83073/83073 co-relation queries the response was YES. [2023-01-27 23:15:24,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28798 conditions, 3401 events. 1673/3401 cut-off events. For 83073/83073 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24940 event pairs, 172 based on Foata normal form. 148/3548 useless extension candidates. Maximal degree in co-relation 28642. Up to 1386 conditions per place. [2023-01-27 23:15:24,945 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 395 selfloop transitions, 133 changer transitions 161/689 dead transitions. [2023-01-27 23:15:24,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 689 transitions, 15671 flow [2023-01-27 23:15:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 23:15:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 23:15:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1836 transitions. [2023-01-27 23:15:24,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23004636010524998 [2023-01-27 23:15:24,947 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1836 transitions. [2023-01-27 23:15:24,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1836 transitions. [2023-01-27 23:15:24,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:24,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1836 transitions. [2023-01-27 23:15:24,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 79.82608695652173) internal successors, (1836), 23 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:24,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:24,953 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:24,953 INFO L175 Difference]: Start difference. First operand has 253 places, 444 transitions, 10131 flow. Second operand 23 states and 1836 transitions. [2023-01-27 23:15:24,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 689 transitions, 15671 flow [2023-01-27 23:15:25,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 689 transitions, 14983 flow, removed 100 selfloop flow, removed 9 redundant places. [2023-01-27 23:15:25,339 INFO L231 Difference]: Finished difference. Result has 275 places, 442 transitions, 9940 flow [2023-01-27 23:15:25,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9940, PETRI_PLACES=275, PETRI_TRANSITIONS=442} [2023-01-27 23:15:25,340 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-01-27 23:15:25,340 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 442 transitions, 9940 flow [2023-01-27 23:15:25,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:25,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:25,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:25,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:25,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-27 23:15:25,542 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:25,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:25,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1127277119, now seen corresponding path program 6 times [2023-01-27 23:15:25,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:25,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655233159] [2023-01-27 23:15:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:25,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:15:25,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:25,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655233159] [2023-01-27 23:15:25,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655233159] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:25,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119784780] [2023-01-27 23:15:25,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:15:25,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:25,627 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:25,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 23:15:25,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 23:15:25,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:25,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 23:15:25,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:25,903 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:15:25,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:25,905 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 17 treesize of output 10 [2023-01-27 23:15:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:25,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:26,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:26,109 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 128 [2023-01-27 23:15:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:26,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119784780] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:26,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:26,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-01-27 23:15:26,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846234212] [2023-01-27 23:15:26,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:26,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 23:15:26,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:26,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 23:15:26,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-01-27 23:15:26,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 347 [2023-01-27 23:15:26,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 442 transitions, 9940 flow. Second operand has 21 states, 21 states have (on average 94.19047619047619) internal successors, (1978), 21 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:26,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:26,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 347 [2023-01-27 23:15:26,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:27,601 INFO L130 PetriNetUnfolder]: 1622/3315 cut-off events. [2023-01-27 23:15:27,601 INFO L131 PetriNetUnfolder]: For 73385/73385 co-relation queries the response was YES. [2023-01-27 23:15:27,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28852 conditions, 3315 events. 1622/3315 cut-off events. For 73385/73385 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24234 event pairs, 87 based on Foata normal form. 53/3367 useless extension candidates. Maximal degree in co-relation 28683. Up to 1119 conditions per place. [2023-01-27 23:15:27,625 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 393 selfloop transitions, 107 changer transitions 166/666 dead transitions. [2023-01-27 23:15:27,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 666 transitions, 15425 flow [2023-01-27 23:15:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 23:15:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 23:15:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2716 transitions. [2023-01-27 23:15:27,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27953890489913547 [2023-01-27 23:15:27,628 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2716 transitions. [2023-01-27 23:15:27,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2716 transitions. [2023-01-27 23:15:27,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:27,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2716 transitions. [2023-01-27 23:15:27,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 97.0) internal successors, (2716), 28 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:27,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:27,635 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:27,635 INFO L175 Difference]: Start difference. First operand has 275 places, 442 transitions, 9940 flow. Second operand 28 states and 2716 transitions. [2023-01-27 23:15:27,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 666 transitions, 15425 flow [2023-01-27 23:15:28,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 666 transitions, 15053 flow, removed 167 selfloop flow, removed 11 redundant places. [2023-01-27 23:15:28,068 INFO L231 Difference]: Finished difference. Result has 285 places, 399 transitions, 8984 flow [2023-01-27 23:15:28,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9583, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8984, PETRI_PLACES=285, PETRI_TRANSITIONS=399} [2023-01-27 23:15:28,068 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-01-27 23:15:28,068 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 399 transitions, 8984 flow [2023-01-27 23:15:28,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 94.19047619047619) internal successors, (1978), 21 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:28,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:28,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:28,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-27 23:15:28,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:28,269 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:28,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:28,269 INFO L85 PathProgramCache]: Analyzing trace with hash 289751092, now seen corresponding path program 11 times [2023-01-27 23:15:28,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:28,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237558839] [2023-01-27 23:15:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:28,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:28,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:28,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237558839] [2023-01-27 23:15:28,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237558839] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:28,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639934406] [2023-01-27 23:15:28,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:15:28,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:28,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:28,421 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:28,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 23:15:28,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:15:28,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:28,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 23:15:28,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:28,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:28,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639934406] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:28,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:28,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-27 23:15:28,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546452484] [2023-01-27 23:15:28,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:28,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 23:15:28,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:28,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 23:15:28,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-01-27 23:15:28,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:15:28,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 399 transitions, 8984 flow. Second operand has 14 states, 14 states have (on average 134.14285714285714) internal successors, (1878), 14 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:28,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:28,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:15:28,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:29,937 INFO L130 PetriNetUnfolder]: 1235/2475 cut-off events. [2023-01-27 23:15:29,937 INFO L131 PetriNetUnfolder]: For 53898/53898 co-relation queries the response was YES. [2023-01-27 23:15:29,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21387 conditions, 2475 events. 1235/2475 cut-off events. For 53898/53898 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16526 event pairs, 183 based on Foata normal form. 16/2490 useless extension candidates. Maximal degree in co-relation 21220. Up to 927 conditions per place. [2023-01-27 23:15:29,953 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 267 selfloop transitions, 195 changer transitions 1/463 dead transitions. [2023-01-27 23:15:29,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 463 transitions, 10351 flow [2023-01-27 23:15:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 23:15:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 23:15:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2477 transitions. [2023-01-27 23:15:29,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39657380723663144 [2023-01-27 23:15:29,956 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2477 transitions. [2023-01-27 23:15:29,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2477 transitions. [2023-01-27 23:15:29,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:29,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2477 transitions. [2023-01-27 23:15:29,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 137.61111111111111) internal successors, (2477), 18 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:29,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:29,962 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:29,962 INFO L175 Difference]: Start difference. First operand has 285 places, 399 transitions, 8984 flow. Second operand 18 states and 2477 transitions. [2023-01-27 23:15:29,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 463 transitions, 10351 flow [2023-01-27 23:15:30,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 463 transitions, 9611 flow, removed 125 selfloop flow, removed 23 redundant places. [2023-01-27 23:15:30,166 INFO L231 Difference]: Finished difference. Result has 265 places, 405 transitions, 8805 flow [2023-01-27 23:15:30,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8277, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8805, PETRI_PLACES=265, PETRI_TRANSITIONS=405} [2023-01-27 23:15:30,167 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-01-27 23:15:30,167 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 405 transitions, 8805 flow [2023-01-27 23:15:30,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 134.14285714285714) internal successors, (1878), 14 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:30,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:30,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:30,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:30,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:30,368 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:30,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1623000778, now seen corresponding path program 2 times [2023-01-27 23:15:30,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:30,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115992194] [2023-01-27 23:15:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:30,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:30,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:30,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115992194] [2023-01-27 23:15:30,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115992194] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:30,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081448822] [2023-01-27 23:15:30,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:15:30,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:30,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:30,981 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:30,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 23:15:31,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:15:31,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 23:15:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:31,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 23:15:31,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:15:31,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:15:31,477 INFO L321 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2023-01-27 23:15:31,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2023-01-27 23:15:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:31,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:32,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:32,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2023-01-27 23:15:32,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:32,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 500 [2023-01-27 23:15:32,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:32,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 116 [2023-01-27 23:15:32,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:32,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 113 [2023-01-27 23:15:32,798 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 23:15:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:32,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081448822] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:32,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:32,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-27 23:15:32,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556562774] [2023-01-27 23:15:32,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:32,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 23:15:32,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 23:15:32,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=882, Unknown=3, NotChecked=0, Total=1056 [2023-01-27 23:15:32,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-01-27 23:15:32,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 405 transitions, 8805 flow. Second operand has 33 states, 33 states have (on average 74.51515151515152) internal successors, (2459), 33 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:32,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:32,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-01-27 23:15:32,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:35,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 23:15:39,875 INFO L130 PetriNetUnfolder]: 1541/3100 cut-off events. [2023-01-27 23:15:39,875 INFO L131 PetriNetUnfolder]: For 57246/57246 co-relation queries the response was YES. [2023-01-27 23:15:39,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25127 conditions, 3100 events. 1541/3100 cut-off events. For 57246/57246 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21833 event pairs, 129 based on Foata normal form. 39/3138 useless extension candidates. Maximal degree in co-relation 24967. Up to 1819 conditions per place. [2023-01-27 23:15:39,895 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 430 selfloop transitions, 101 changer transitions 111/642 dead transitions. [2023-01-27 23:15:39,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 642 transitions, 13257 flow [2023-01-27 23:15:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 23:15:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 23:15:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2525 transitions. [2023-01-27 23:15:39,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2273955331412104 [2023-01-27 23:15:39,898 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2525 transitions. [2023-01-27 23:15:39,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2525 transitions. [2023-01-27 23:15:39,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:39,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2525 transitions. [2023-01-27 23:15:39,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 78.90625) internal successors, (2525), 32 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:39,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:39,905 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:39,905 INFO L175 Difference]: Start difference. First operand has 265 places, 405 transitions, 8805 flow. Second operand 32 states and 2525 transitions. [2023-01-27 23:15:39,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 642 transitions, 13257 flow [2023-01-27 23:15:40,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 642 transitions, 12846 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-01-27 23:15:40,129 INFO L231 Difference]: Finished difference. Result has 309 places, 442 transitions, 9681 flow [2023-01-27 23:15:40,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9681, PETRI_PLACES=309, PETRI_TRANSITIONS=442} [2023-01-27 23:15:40,130 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-01-27 23:15:40,130 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 442 transitions, 9681 flow [2023-01-27 23:15:40,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 74.51515151515152) internal successors, (2459), 33 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:40,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:40,130 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:40,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:40,335 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:40,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1456848755, now seen corresponding path program 7 times [2023-01-27 23:15:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479557882] [2023-01-27 23:15:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:15:40,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:40,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479557882] [2023-01-27 23:15:40,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479557882] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:40,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016577065] [2023-01-27 23:15:40,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:15:40,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:40,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:40,533 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:40,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 23:15:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 23:15:40,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:40,843 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:15:40,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:40,845 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 17 treesize of output 10 [2023-01-27 23:15:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:40,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:41,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:41,045 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 71 treesize of output 56 [2023-01-27 23:15:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:41,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016577065] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:41,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:41,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-01-27 23:15:41,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092588971] [2023-01-27 23:15:41,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:41,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 23:15:41,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 23:15:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-01-27 23:15:41,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 347 [2023-01-27 23:15:41,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 442 transitions, 9681 flow. Second operand has 24 states, 24 states have (on average 94.125) internal successors, (2259), 24 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:41,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:41,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 347 [2023-01-27 23:15:41,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:43,348 INFO L130 PetriNetUnfolder]: 1470/2904 cut-off events. [2023-01-27 23:15:43,348 INFO L131 PetriNetUnfolder]: For 59284/59284 co-relation queries the response was YES. [2023-01-27 23:15:43,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24732 conditions, 2904 events. 1470/2904 cut-off events. For 59284/59284 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19669 event pairs, 138 based on Foata normal form. 19/2922 useless extension candidates. Maximal degree in co-relation 24555. Up to 2072 conditions per place. [2023-01-27 23:15:43,369 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 407 selfloop transitions, 112 changer transitions 71/590 dead transitions. [2023-01-27 23:15:43,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 590 transitions, 12513 flow [2023-01-27 23:15:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 23:15:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 23:15:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3121 transitions. [2023-01-27 23:15:43,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2810698847262248 [2023-01-27 23:15:43,372 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3121 transitions. [2023-01-27 23:15:43,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3121 transitions. [2023-01-27 23:15:43,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:43,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3121 transitions. [2023-01-27 23:15:43,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 97.53125) internal successors, (3121), 32 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:43,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:43,380 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:43,380 INFO L175 Difference]: Start difference. First operand has 309 places, 442 transitions, 9681 flow. Second operand 32 states and 3121 transitions. [2023-01-27 23:15:43,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 590 transitions, 12513 flow [2023-01-27 23:15:43,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 590 transitions, 12163 flow, removed 155 selfloop flow, removed 16 redundant places. [2023-01-27 23:15:43,615 INFO L231 Difference]: Finished difference. Result has 318 places, 445 transitions, 9876 flow [2023-01-27 23:15:43,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9332, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9876, PETRI_PLACES=318, PETRI_TRANSITIONS=445} [2023-01-27 23:15:43,615 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 297 predicate places. [2023-01-27 23:15:43,615 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 445 transitions, 9876 flow [2023-01-27 23:15:43,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 94.125) internal successors, (2259), 24 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:43,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:43,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:43,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:43,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 23:15:43,823 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:43,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1057721665, now seen corresponding path program 3 times [2023-01-27 23:15:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:43,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917559823] [2023-01-27 23:15:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:43,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:44,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:44,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917559823] [2023-01-27 23:15:44,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917559823] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200215541] [2023-01-27 23:15:44,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:15:44,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:44,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:44,749 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:44,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 23:15:44,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:15:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 23:15:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:45,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:45,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-01-27 23:15:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:15:45,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:45,549 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:15:45,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:15:45,605 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-27 23:15:45,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-27 23:15:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:45,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200215541] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:45,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:45,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-27 23:15:45,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758774963] [2023-01-27 23:15:45,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:45,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 23:15:45,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:45,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 23:15:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-01-27 23:15:45,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-27 23:15:45,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 445 transitions, 9876 flow. Second operand has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:45,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:45,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-27 23:15:45,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:48,286 INFO L130 PetriNetUnfolder]: 1576/3098 cut-off events. [2023-01-27 23:15:48,286 INFO L131 PetriNetUnfolder]: For 64253/64253 co-relation queries the response was YES. [2023-01-27 23:15:48,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26742 conditions, 3098 events. 1576/3098 cut-off events. For 64253/64253 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21189 event pairs, 155 based on Foata normal form. 6/3102 useless extension candidates. Maximal degree in co-relation 26566. Up to 2427 conditions per place. [2023-01-27 23:15:48,312 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 429 selfloop transitions, 185 changer transitions 23/637 dead transitions. [2023-01-27 23:15:48,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 637 transitions, 13657 flow [2023-01-27 23:15:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 23:15:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 23:15:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3173 transitions. [2023-01-27 23:15:48,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26125977768629066 [2023-01-27 23:15:48,315 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3173 transitions. [2023-01-27 23:15:48,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3173 transitions. [2023-01-27 23:15:48,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:48,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3173 transitions. [2023-01-27 23:15:48,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.65714285714286) internal successors, (3173), 35 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:48,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:48,323 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:48,324 INFO L175 Difference]: Start difference. First operand has 318 places, 445 transitions, 9876 flow. Second operand 35 states and 3173 transitions. [2023-01-27 23:15:48,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 637 transitions, 13657 flow [2023-01-27 23:15:48,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 637 transitions, 13228 flow, removed 63 selfloop flow, removed 18 redundant places. [2023-01-27 23:15:48,623 INFO L231 Difference]: Finished difference. Result has 336 places, 528 transitions, 11946 flow [2023-01-27 23:15:48,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11946, PETRI_PLACES=336, PETRI_TRANSITIONS=528} [2023-01-27 23:15:48,624 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-01-27 23:15:48,624 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 528 transitions, 11946 flow [2023-01-27 23:15:48,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:48,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:48,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:48,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-27 23:15:48,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 23:15:48,828 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:48,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash 457305767, now seen corresponding path program 4 times [2023-01-27 23:15:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:48,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130865736] [2023-01-27 23:15:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:48,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:49,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:49,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130865736] [2023-01-27 23:15:49,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130865736] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:49,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505602025] [2023-01-27 23:15:49,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:15:49,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:49,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:49,677 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:49,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 23:15:49,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:15:49,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:49,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 23:15:49,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:50,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:15:50,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-01-27 23:15:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:15:50,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:50,619 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:15:50,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:15:50,676 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-27 23:15:50,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-27 23:15:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:50,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505602025] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:50,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:50,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-27 23:15:50,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740660412] [2023-01-27 23:15:50,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:50,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 23:15:50,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:50,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 23:15:50,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2023-01-27 23:15:50,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-27 23:15:50,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 528 transitions, 11946 flow. Second operand has 29 states, 29 states have (on average 86.65517241379311) internal successors, (2513), 29 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:50,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:50,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-27 23:15:50,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:53,082 INFO L130 PetriNetUnfolder]: 1596/3144 cut-off events. [2023-01-27 23:15:53,082 INFO L131 PetriNetUnfolder]: For 67191/67191 co-relation queries the response was YES. [2023-01-27 23:15:53,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27955 conditions, 3144 events. 1596/3144 cut-off events. For 67191/67191 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21664 event pairs, 183 based on Foata normal form. 6/3148 useless extension candidates. Maximal degree in co-relation 27763. Up to 2479 conditions per place. [2023-01-27 23:15:53,111 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 446 selfloop transitions, 170 changer transitions 15/631 dead transitions. [2023-01-27 23:15:53,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 631 transitions, 14015 flow [2023-01-27 23:15:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 23:15:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 23:15:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2554 transitions. [2023-01-27 23:15:53,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26286537669822974 [2023-01-27 23:15:53,114 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2554 transitions. [2023-01-27 23:15:53,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2554 transitions. [2023-01-27 23:15:53,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:53,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2554 transitions. [2023-01-27 23:15:53,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 91.21428571428571) internal successors, (2554), 28 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:53,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:53,121 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:53,121 INFO L175 Difference]: Start difference. First operand has 336 places, 528 transitions, 11946 flow. Second operand 28 states and 2554 transitions. [2023-01-27 23:15:53,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 631 transitions, 14015 flow [2023-01-27 23:15:53,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 631 transitions, 13624 flow, removed 155 selfloop flow, removed 11 redundant places. [2023-01-27 23:15:53,491 INFO L231 Difference]: Finished difference. Result has 358 places, 545 transitions, 12428 flow [2023-01-27 23:15:53,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=11630, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12428, PETRI_PLACES=358, PETRI_TRANSITIONS=545} [2023-01-27 23:15:53,492 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 337 predicate places. [2023-01-27 23:15:53,492 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 545 transitions, 12428 flow [2023-01-27 23:15:53,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.65517241379311) internal successors, (2513), 29 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:53,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:53,493 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:53,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:53,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 23:15:53,694 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:53,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:53,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1593429793, now seen corresponding path program 5 times [2023-01-27 23:15:53,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:53,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824121262] [2023-01-27 23:15:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:53,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:15:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:15:54,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:15:54,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824121262] [2023-01-27 23:15:54,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824121262] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:15:54,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136319584] [2023-01-27 23:15:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:15:54,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:54,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:15:54,434 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:15:54,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 23:15:54,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:15:54,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:15:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 23:15:54,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:15:54,825 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:15:54,839 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-01-27 23:15:54,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 33 [2023-01-27 23:15:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:15:54,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:15:55,435 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:15:55,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:15:55,493 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-27 23:15:55,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-27 23:15:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:15:55,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136319584] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:15:55,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:15:55,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2023-01-27 23:15:55,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213995540] [2023-01-27 23:15:55,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:15:55,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 23:15:55,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:15:55,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 23:15:55,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-01-27 23:15:55,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-27 23:15:55,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 545 transitions, 12428 flow. Second operand has 30 states, 30 states have (on average 86.73333333333333) internal successors, (2602), 30 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:55,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:15:55,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-27 23:15:55,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:58,619 INFO L130 PetriNetUnfolder]: 1625/3195 cut-off events. [2023-01-27 23:15:58,619 INFO L131 PetriNetUnfolder]: For 69894/69894 co-relation queries the response was YES. [2023-01-27 23:15:58,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28688 conditions, 3195 events. 1625/3195 cut-off events. For 69894/69894 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22001 event pairs, 173 based on Foata normal form. 4/3198 useless extension candidates. Maximal degree in co-relation 28489. Up to 2545 conditions per place. [2023-01-27 23:15:58,647 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 455 selfloop transitions, 178 changer transitions 21/654 dead transitions. [2023-01-27 23:15:58,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 654 transitions, 14454 flow [2023-01-27 23:15:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 23:15:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 23:15:58,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2916 transitions. [2023-01-27 23:15:58,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26260806916426516 [2023-01-27 23:15:58,650 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2916 transitions. [2023-01-27 23:15:58,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2916 transitions. [2023-01-27 23:15:58,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:58,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2916 transitions. [2023-01-27 23:15:58,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 91.125) internal successors, (2916), 32 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:58,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:58,657 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:58,657 INFO L175 Difference]: Start difference. First operand has 358 places, 545 transitions, 12428 flow. Second operand 32 states and 2916 transitions. [2023-01-27 23:15:58,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 654 transitions, 14454 flow [2023-01-27 23:15:59,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 654 transitions, 14282 flow, removed 49 selfloop flow, removed 12 redundant places. [2023-01-27 23:15:59,052 INFO L231 Difference]: Finished difference. Result has 381 places, 554 transitions, 12866 flow [2023-01-27 23:15:59,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=12260, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12866, PETRI_PLACES=381, PETRI_TRANSITIONS=554} [2023-01-27 23:15:59,052 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 360 predicate places. [2023-01-27 23:15:59,052 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 554 transitions, 12866 flow [2023-01-27 23:15:59,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.73333333333333) internal successors, (2602), 30 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:59,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:15:59,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:15:59,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:59,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:59,257 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:15:59,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:15:59,258 INFO L85 PathProgramCache]: Analyzing trace with hash -571252333, now seen corresponding path program 6 times [2023-01-27 23:15:59,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:15:59,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689631884] [2023-01-27 23:15:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:15:59,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:15:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:16:00,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:00,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689631884] [2023-01-27 23:16:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689631884] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:00,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882043533] [2023-01-27 23:16:00,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:16:00,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:00,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:00,072 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:00,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 23:16:00,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 23:16:00,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:16:00,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 23:16:00,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:00,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:16:00,397 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-01-27 23:16:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:16:00,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:00,946 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:16:00,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:16:01,000 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-27 23:16:01,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-27 23:16:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:01,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882043533] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:01,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:01,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-27 23:16:01,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029864801] [2023-01-27 23:16:01,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:01,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 23:16:01,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 23:16:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-01-27 23:16:01,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-27 23:16:01,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 554 transitions, 12866 flow. Second operand has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:01,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:01,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-27 23:16:01,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:04,104 INFO L130 PetriNetUnfolder]: 1722/3362 cut-off events. [2023-01-27 23:16:04,104 INFO L131 PetriNetUnfolder]: For 77790/77790 co-relation queries the response was YES. [2023-01-27 23:16:04,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30870 conditions, 3362 events. 1722/3362 cut-off events. For 77790/77790 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 23342 event pairs, 221 based on Foata normal form. 5/3366 useless extension candidates. Maximal degree in co-relation 30665. Up to 2866 conditions per place. [2023-01-27 23:16:04,139 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 517 selfloop transitions, 145 changer transitions 21/683 dead transitions. [2023-01-27 23:16:04,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 683 transitions, 15742 flow [2023-01-27 23:16:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 23:16:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 23:16:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3164 transitions. [2023-01-27 23:16:04,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26051873198847264 [2023-01-27 23:16:04,142 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3164 transitions. [2023-01-27 23:16:04,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3164 transitions. [2023-01-27 23:16:04,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:04,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3164 transitions. [2023-01-27 23:16:04,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.4) internal successors, (3164), 35 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:04,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:04,151 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:04,151 INFO L175 Difference]: Start difference. First operand has 381 places, 554 transitions, 12866 flow. Second operand 35 states and 3164 transitions. [2023-01-27 23:16:04,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 683 transitions, 15742 flow [2023-01-27 23:16:04,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 683 transitions, 15405 flow, removed 27 selfloop flow, removed 25 redundant places. [2023-01-27 23:16:04,594 INFO L231 Difference]: Finished difference. Result has 396 places, 594 transitions, 13952 flow [2023-01-27 23:16:04,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=12543, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13952, PETRI_PLACES=396, PETRI_TRANSITIONS=594} [2023-01-27 23:16:04,595 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 375 predicate places. [2023-01-27 23:16:04,595 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 594 transitions, 13952 flow [2023-01-27 23:16:04,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.79310344827586) internal successors, (2517), 29 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:04,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:04,595 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:04,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:04,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:04,797 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:04,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:04,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1478888581, now seen corresponding path program 7 times [2023-01-27 23:16:04,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:04,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247666327] [2023-01-27 23:16:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:04,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:16:05,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247666327] [2023-01-27 23:16:05,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247666327] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:05,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880409630] [2023-01-27 23:16:05,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:16:05,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:05,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:05,698 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:05,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 23:16:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:05,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 23:16:05,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:06,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:16:06,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-01-27 23:16:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:06,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:06,661 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:16:06,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:16:06,721 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-27 23:16:06,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-27 23:16:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:06,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880409630] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:06,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:06,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 27 [2023-01-27 23:16:06,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655299020] [2023-01-27 23:16:06,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:06,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 23:16:06,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:06,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 23:16:06,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-01-27 23:16:06,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-27 23:16:06,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 594 transitions, 13952 flow. Second operand has 29 states, 29 states have (on average 86.62068965517241) internal successors, (2512), 29 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:06,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:06,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-27 23:16:06,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:10,038 INFO L130 PetriNetUnfolder]: 1781/3477 cut-off events. [2023-01-27 23:16:10,039 INFO L131 PetriNetUnfolder]: For 84319/84319 co-relation queries the response was YES. [2023-01-27 23:16:10,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32396 conditions, 3477 events. 1781/3477 cut-off events. For 84319/84319 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24306 event pairs, 243 based on Foata normal form. 3/3479 useless extension candidates. Maximal degree in co-relation 32184. Up to 3047 conditions per place. [2023-01-27 23:16:10,070 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 548 selfloop transitions, 138 changer transitions 15/701 dead transitions. [2023-01-27 23:16:10,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 701 transitions, 16523 flow [2023-01-27 23:16:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 23:16:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 23:16:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2877 transitions. [2023-01-27 23:16:10,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2590958213256484 [2023-01-27 23:16:10,073 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2877 transitions. [2023-01-27 23:16:10,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2877 transitions. [2023-01-27 23:16:10,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:10,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2877 transitions. [2023-01-27 23:16:10,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 89.90625) internal successors, (2877), 32 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:10,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:10,080 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:10,080 INFO L175 Difference]: Start difference. First operand has 396 places, 594 transitions, 13952 flow. Second operand 32 states and 2877 transitions. [2023-01-27 23:16:10,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 701 transitions, 16523 flow [2023-01-27 23:16:10,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 701 transitions, 15733 flow, removed 83 selfloop flow, removed 21 redundant places. [2023-01-27 23:16:10,488 INFO L231 Difference]: Finished difference. Result has 412 places, 630 transitions, 14397 flow [2023-01-27 23:16:10,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=13206, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14397, PETRI_PLACES=412, PETRI_TRANSITIONS=630} [2023-01-27 23:16:10,489 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 391 predicate places. [2023-01-27 23:16:10,489 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 630 transitions, 14397 flow [2023-01-27 23:16:10,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.62068965517241) internal successors, (2512), 29 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:10,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:10,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:10,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:10,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-27 23:16:10,691 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:10,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:10,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1479483227, now seen corresponding path program 8 times [2023-01-27 23:16:10,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:10,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777448308] [2023-01-27 23:16:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:10,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:16:11,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:11,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777448308] [2023-01-27 23:16:11,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777448308] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:11,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290970392] [2023-01-27 23:16:11,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:16:11,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:11,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:11,337 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:11,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 23:16:11,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:16:11,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:16:11,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 23:16:11,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:11,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:16:11,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-01-27 23:16:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:16:11,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:12,295 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:16:12,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:16:12,345 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-01-27 23:16:12,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-01-27 23:16:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:12,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290970392] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:12,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:12,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-27 23:16:12,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185074328] [2023-01-27 23:16:12,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:12,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 23:16:12,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:12,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 23:16:12,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-01-27 23:16:12,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 347 [2023-01-27 23:16:12,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 630 transitions, 14397 flow. Second operand has 29 states, 29 states have (on average 93.65517241379311) internal successors, (2716), 29 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:12,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:12,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 347 [2023-01-27 23:16:12,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:15,397 INFO L130 PetriNetUnfolder]: 1826/3559 cut-off events. [2023-01-27 23:16:15,397 INFO L131 PetriNetUnfolder]: For 89339/89339 co-relation queries the response was YES. [2023-01-27 23:16:15,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33151 conditions, 3559 events. 1826/3559 cut-off events. For 89339/89339 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24992 event pairs, 233 based on Foata normal form. 7/3565 useless extension candidates. Maximal degree in co-relation 32935. Up to 3050 conditions per place. [2023-01-27 23:16:15,433 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 564 selfloop transitions, 145 changer transitions 26/735 dead transitions. [2023-01-27 23:16:15,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 735 transitions, 16993 flow [2023-01-27 23:16:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-27 23:16:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-27 23:16:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3308 transitions. [2023-01-27 23:16:15,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2803865061874894 [2023-01-27 23:16:15,436 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3308 transitions. [2023-01-27 23:16:15,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3308 transitions. [2023-01-27 23:16:15,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:15,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3308 transitions. [2023-01-27 23:16:15,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 97.29411764705883) internal successors, (3308), 34 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:15,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:15,447 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:15,447 INFO L175 Difference]: Start difference. First operand has 412 places, 630 transitions, 14397 flow. Second operand 34 states and 3308 transitions. [2023-01-27 23:16:15,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 735 transitions, 16993 flow [2023-01-27 23:16:15,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 735 transitions, 16627 flow, removed 115 selfloop flow, removed 19 redundant places. [2023-01-27 23:16:15,948 INFO L231 Difference]: Finished difference. Result has 433 places, 652 transitions, 15108 flow [2023-01-27 23:16:15,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=14030, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15108, PETRI_PLACES=433, PETRI_TRANSITIONS=652} [2023-01-27 23:16:15,949 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 412 predicate places. [2023-01-27 23:16:15,949 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 652 transitions, 15108 flow [2023-01-27 23:16:15,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 93.65517241379311) internal successors, (2716), 29 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:15,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:15,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:15,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:16,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-01-27 23:16:16,150 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:16,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:16,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2036955866, now seen corresponding path program 9 times [2023-01-27 23:16:16,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:16,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622677101] [2023-01-27 23:16:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:16,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:16,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622677101] [2023-01-27 23:16:16,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622677101] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156137740] [2023-01-27 23:16:16,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:16:16,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:16,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:16,288 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:16,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 23:16:16,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:16:16,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:16:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-27 23:16:16,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:16:16,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:16:16,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156137740] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:16,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:16,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-01-27 23:16:16,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475016619] [2023-01-27 23:16:16,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:16,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 23:16:16,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:16,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 23:16:16,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-01-27 23:16:16,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:16:16,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 652 transitions, 15108 flow. Second operand has 11 states, 11 states have (on average 134.54545454545453) internal successors, (1480), 11 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:16,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:16,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:16:16,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:17,631 INFO L130 PetriNetUnfolder]: 1789/3412 cut-off events. [2023-01-27 23:16:17,631 INFO L131 PetriNetUnfolder]: For 92525/92525 co-relation queries the response was YES. [2023-01-27 23:16:17,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32588 conditions, 3412 events. 1789/3412 cut-off events. For 92525/92525 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23104 event pairs, 484 based on Foata normal form. 34/3445 useless extension candidates. Maximal degree in co-relation 32385. Up to 2150 conditions per place. [2023-01-27 23:16:17,666 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 515 selfloop transitions, 154 changer transitions 0/669 dead transitions. [2023-01-27 23:16:17,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 669 transitions, 16527 flow [2023-01-27 23:16:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 23:16:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 23:16:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1114 transitions. [2023-01-27 23:16:17,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40129682997118155 [2023-01-27 23:16:17,668 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1114 transitions. [2023-01-27 23:16:17,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1114 transitions. [2023-01-27 23:16:17,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:17,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1114 transitions. [2023-01-27 23:16:17,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 139.25) internal successors, (1114), 8 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:17,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:17,670 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:17,670 INFO L175 Difference]: Start difference. First operand has 433 places, 652 transitions, 15108 flow. Second operand 8 states and 1114 transitions. [2023-01-27 23:16:17,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 669 transitions, 16527 flow [2023-01-27 23:16:18,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 669 transitions, 16264 flow, removed 71 selfloop flow, removed 24 redundant places. [2023-01-27 23:16:18,253 INFO L231 Difference]: Finished difference. Result has 411 places, 648 transitions, 15133 flow [2023-01-27 23:16:18,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=14589, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15133, PETRI_PLACES=411, PETRI_TRANSITIONS=648} [2023-01-27 23:16:18,254 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 390 predicate places. [2023-01-27 23:16:18,254 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 648 transitions, 15133 flow [2023-01-27 23:16:18,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 134.54545454545453) internal successors, (1480), 11 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:18,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:18,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:18,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:18,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:18,455 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:18,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:18,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1984941564, now seen corresponding path program 10 times [2023-01-27 23:16:18,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:18,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768705876] [2023-01-27 23:16:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:18,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:18,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:18,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768705876] [2023-01-27 23:16:18,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768705876] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:18,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809211220] [2023-01-27 23:16:18,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:16:18,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:18,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:18,588 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:18,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 23:16:18,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:16:18,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:16:18,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 23:16:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:18,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:19,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809211220] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:19,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:19,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 23:16:19,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431024438] [2023-01-27 23:16:19,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:19,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:16:19,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:19,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:16:19,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:16:19,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:16:19,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 648 transitions, 15133 flow. Second operand has 18 states, 18 states have (on average 133.88888888888889) internal successors, (2410), 18 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:19,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:19,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:16:19,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:22,072 INFO L130 PetriNetUnfolder]: 2063/4008 cut-off events. [2023-01-27 23:16:22,072 INFO L131 PetriNetUnfolder]: For 103834/103834 co-relation queries the response was YES. [2023-01-27 23:16:22,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37734 conditions, 4008 events. 2063/4008 cut-off events. For 103834/103834 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28590 event pairs, 398 based on Foata normal form. 58/4065 useless extension candidates. Maximal degree in co-relation 37506. Up to 2197 conditions per place. [2023-01-27 23:16:22,115 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 546 selfloop transitions, 308 changer transitions 2/856 dead transitions. [2023-01-27 23:16:22,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 856 transitions, 19797 flow [2023-01-27 23:16:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 23:16:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 23:16:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5098 transitions. [2023-01-27 23:16:22,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39707142300802245 [2023-01-27 23:16:22,119 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5098 transitions. [2023-01-27 23:16:22,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5098 transitions. [2023-01-27 23:16:22,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:22,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5098 transitions. [2023-01-27 23:16:22,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 137.78378378378378) internal successors, (5098), 37 states have internal predecessors, (5098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:22,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:22,128 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:22,128 INFO L175 Difference]: Start difference. First operand has 411 places, 648 transitions, 15133 flow. Second operand 37 states and 5098 transitions. [2023-01-27 23:16:22,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 856 transitions, 19797 flow [2023-01-27 23:16:22,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 856 transitions, 19296 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-01-27 23:16:22,826 INFO L231 Difference]: Finished difference. Result has 456 places, 734 transitions, 17686 flow [2023-01-27 23:16:22,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=14667, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17686, PETRI_PLACES=456, PETRI_TRANSITIONS=734} [2023-01-27 23:16:22,827 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 435 predicate places. [2023-01-27 23:16:22,827 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 734 transitions, 17686 flow [2023-01-27 23:16:22,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.88888888888889) internal successors, (2410), 18 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:22,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:22,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:22,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-27 23:16:23,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:23,028 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:23,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:23,028 INFO L85 PathProgramCache]: Analyzing trace with hash -102502875, now seen corresponding path program 11 times [2023-01-27 23:16:23,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:23,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567090551] [2023-01-27 23:16:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:23,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:16:23,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:23,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567090551] [2023-01-27 23:16:23,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567090551] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:23,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373139410] [2023-01-27 23:16:23,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:16:23,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:23,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:23,890 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:23,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 23:16:23,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:16:23,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:16:23,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 23:16:23,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:24,298 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:16:24,311 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2023-01-27 23:16:24,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 31 [2023-01-27 23:16:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:24,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:24,975 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-27 23:16:24,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-27 23:16:25,120 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:16:25,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:16:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:25,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373139410] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:25,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:25,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2023-01-27 23:16:25,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948708538] [2023-01-27 23:16:25,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:25,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 23:16:25,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:25,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 23:16:25,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2023-01-27 23:16:25,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-27 23:16:25,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 734 transitions, 17686 flow. Second operand has 29 states, 29 states have (on average 86.75862068965517) internal successors, (2516), 29 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:25,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:25,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-27 23:16:25,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:28,918 INFO L130 PetriNetUnfolder]: 2133/4127 cut-off events. [2023-01-27 23:16:28,918 INFO L131 PetriNetUnfolder]: For 112263/112263 co-relation queries the response was YES. [2023-01-27 23:16:28,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40340 conditions, 4127 events. 2133/4127 cut-off events. For 112263/112263 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29489 event pairs, 217 based on Foata normal form. 4/4130 useless extension candidates. Maximal degree in co-relation 40097. Up to 3658 conditions per place. [2023-01-27 23:16:28,960 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 703 selfloop transitions, 122 changer transitions 14/839 dead transitions. [2023-01-27 23:16:28,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 839 transitions, 20400 flow [2023-01-27 23:16:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 23:16:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 23:16:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2634 transitions. [2023-01-27 23:16:28,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2617509688959555 [2023-01-27 23:16:28,963 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2634 transitions. [2023-01-27 23:16:28,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2634 transitions. [2023-01-27 23:16:28,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:28,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2634 transitions. [2023-01-27 23:16:28,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 90.82758620689656) internal successors, (2634), 29 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:28,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 347.0) internal successors, (10410), 30 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:28,969 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 347.0) internal successors, (10410), 30 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:28,969 INFO L175 Difference]: Start difference. First operand has 456 places, 734 transitions, 17686 flow. Second operand 29 states and 2634 transitions. [2023-01-27 23:16:28,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 839 transitions, 20400 flow [2023-01-27 23:16:29,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 839 transitions, 19619 flow, removed 307 selfloop flow, removed 12 redundant places. [2023-01-27 23:16:29,764 INFO L231 Difference]: Finished difference. Result has 480 places, 756 transitions, 17848 flow [2023-01-27 23:16:29,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=16905, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=17848, PETRI_PLACES=480, PETRI_TRANSITIONS=756} [2023-01-27 23:16:29,764 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 459 predicate places. [2023-01-27 23:16:29,764 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 756 transitions, 17848 flow [2023-01-27 23:16:29,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.75862068965517) internal successors, (2516), 29 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:29,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:29,765 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:29,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:29,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:29,965 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:29,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:29,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1211782553, now seen corresponding path program 12 times [2023-01-27 23:16:29,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:29,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906725346] [2023-01-27 23:16:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:29,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:16:30,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:30,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906725346] [2023-01-27 23:16:30,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906725346] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:30,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939021365] [2023-01-27 23:16:30,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:16:30,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:30,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:30,607 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:30,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-27 23:16:30,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 23:16:30,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:16:30,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 23:16:30,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:30,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:16:30,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-01-27 23:16:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:16:31,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:31,523 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-27 23:16:31,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-27 23:16:31,643 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:16:31,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:16:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:31,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939021365] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:31,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:31,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-01-27 23:16:31,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463331684] [2023-01-27 23:16:31,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:31,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 23:16:31,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:31,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 23:16:31,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2023-01-27 23:16:31,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-27 23:16:31,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 756 transitions, 17848 flow. Second operand has 28 states, 28 states have (on average 86.71428571428571) internal successors, (2428), 28 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:31,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:31,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-27 23:16:31,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:34,180 INFO L130 PetriNetUnfolder]: 2561/4966 cut-off events. [2023-01-27 23:16:34,180 INFO L131 PetriNetUnfolder]: For 126684/126684 co-relation queries the response was YES. [2023-01-27 23:16:34,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47257 conditions, 4966 events. 2561/4966 cut-off events. For 126684/126684 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 37072 event pairs, 282 based on Foata normal form. 4/4969 useless extension candidates. Maximal degree in co-relation 46922. Up to 3871 conditions per place. [2023-01-27 23:16:34,240 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 781 selfloop transitions, 180 changer transitions 12/973 dead transitions. [2023-01-27 23:16:34,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 973 transitions, 23733 flow [2023-01-27 23:16:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 23:16:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 23:16:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2801 transitions. [2023-01-27 23:16:34,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26038858417774474 [2023-01-27 23:16:34,243 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2801 transitions. [2023-01-27 23:16:34,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2801 transitions. [2023-01-27 23:16:34,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:34,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2801 transitions. [2023-01-27 23:16:34,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 90.35483870967742) internal successors, (2801), 31 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:34,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:34,249 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:34,249 INFO L175 Difference]: Start difference. First operand has 480 places, 756 transitions, 17848 flow. Second operand 31 states and 2801 transitions. [2023-01-27 23:16:34,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 973 transitions, 23733 flow [2023-01-27 23:16:35,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 973 transitions, 23314 flow, removed 119 selfloop flow, removed 20 redundant places. [2023-01-27 23:16:35,443 INFO L231 Difference]: Finished difference. Result has 499 places, 855 transitions, 20824 flow [2023-01-27 23:16:35,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=17455, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=20824, PETRI_PLACES=499, PETRI_TRANSITIONS=855} [2023-01-27 23:16:35,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 478 predicate places. [2023-01-27 23:16:35,444 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 855 transitions, 20824 flow [2023-01-27 23:16:35,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 86.71428571428571) internal successors, (2428), 28 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:35,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:35,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:35,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:35,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-27 23:16:35,645 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:35,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:35,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1193348527, now seen corresponding path program 13 times [2023-01-27 23:16:35,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:35,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172429346] [2023-01-27 23:16:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:35,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:16:36,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:36,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172429346] [2023-01-27 23:16:36,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172429346] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:36,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178444249] [2023-01-27 23:16:36,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:16:36,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:36,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:36,419 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:36,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-27 23:16:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 23:16:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:36,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:16:36,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-01-27 23:16:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:16:36,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:37,527 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-27 23:16:37,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-27 23:16:37,658 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:16:37,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:16:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:37,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178444249] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:37,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:37,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-01-27 23:16:37,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126861915] [2023-01-27 23:16:37,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:37,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-27 23:16:37,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-27 23:16:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-01-27 23:16:37,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-27 23:16:37,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 855 transitions, 20824 flow. Second operand has 28 states, 28 states have (on average 86.71428571428571) internal successors, (2428), 28 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:37,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:37,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-27 23:16:37,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:40,804 INFO L130 PetriNetUnfolder]: 2638/5144 cut-off events. [2023-01-27 23:16:40,804 INFO L131 PetriNetUnfolder]: For 141988/141988 co-relation queries the response was YES. [2023-01-27 23:16:40,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49999 conditions, 5144 events. 2638/5144 cut-off events. For 141988/141988 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 38955 event pairs, 354 based on Foata normal form. 5/5148 useless extension candidates. Maximal degree in co-relation 49650. Up to 4186 conditions per place. [2023-01-27 23:16:40,862 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 831 selfloop transitions, 169 changer transitions 15/1015 dead transitions. [2023-01-27 23:16:40,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1015 transitions, 25200 flow [2023-01-27 23:16:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 23:16:40,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 23:16:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2980 transitions. [2023-01-27 23:16:40,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2602392804121911 [2023-01-27 23:16:40,865 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2980 transitions. [2023-01-27 23:16:40,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2980 transitions. [2023-01-27 23:16:40,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:40,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2980 transitions. [2023-01-27 23:16:40,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 90.3030303030303) internal successors, (2980), 33 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:40,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:40,872 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:40,872 INFO L175 Difference]: Start difference. First operand has 499 places, 855 transitions, 20824 flow. Second operand 33 states and 2980 transitions. [2023-01-27 23:16:40,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1015 transitions, 25200 flow [2023-01-27 23:16:42,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1015 transitions, 24661 flow, removed 221 selfloop flow, removed 14 redundant places. [2023-01-27 23:16:42,101 INFO L231 Difference]: Finished difference. Result has 525 places, 888 transitions, 21721 flow [2023-01-27 23:16:42,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=20474, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21721, PETRI_PLACES=525, PETRI_TRANSITIONS=888} [2023-01-27 23:16:42,102 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 504 predicate places. [2023-01-27 23:16:42,102 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 888 transitions, 21721 flow [2023-01-27 23:16:42,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 86.71428571428571) internal successors, (2428), 28 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:42,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:42,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:42,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:42,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-27 23:16:42,303 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:42,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:42,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1218230575, now seen corresponding path program 14 times [2023-01-27 23:16:42,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:42,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592332267] [2023-01-27 23:16:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:42,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:16:43,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:43,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592332267] [2023-01-27 23:16:43,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592332267] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:43,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082307637] [2023-01-27 23:16:43,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:16:43,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:43,040 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:43,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-27 23:16:43,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:16:43,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:16:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 23:16:43,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:43,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:16:43,350 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-01-27 23:16:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:16:43,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:16:43,892 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-01-27 23:16:43,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-01-27 23:16:44,015 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-01-27 23:16:44,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-01-27 23:16:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:44,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082307637] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:16:44,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:16:44,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-01-27 23:16:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640147349] [2023-01-27 23:16:44,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:16:44,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 23:16:44,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:16:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 23:16:44,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-01-27 23:16:44,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-01-27 23:16:44,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 888 transitions, 21721 flow. Second operand has 29 states, 29 states have (on average 86.65517241379311) internal successors, (2513), 29 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:44,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:16:44,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-01-27 23:16:44,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:16:47,518 INFO L130 PetriNetUnfolder]: 2659/5179 cut-off events. [2023-01-27 23:16:47,518 INFO L131 PetriNetUnfolder]: For 147646/147646 co-relation queries the response was YES. [2023-01-27 23:16:47,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50772 conditions, 5179 events. 2659/5179 cut-off events. For 147646/147646 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39206 event pairs, 295 based on Foata normal form. 5/5183 useless extension candidates. Maximal degree in co-relation 50407. Up to 4624 conditions per place. [2023-01-27 23:16:47,578 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 828 selfloop transitions, 145 changer transitions 14/987 dead transitions. [2023-01-27 23:16:47,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 987 transitions, 24501 flow [2023-01-27 23:16:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 23:16:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 23:16:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2988 transitions. [2023-01-27 23:16:47,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26093790935289496 [2023-01-27 23:16:47,581 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2988 transitions. [2023-01-27 23:16:47,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2988 transitions. [2023-01-27 23:16:47,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:16:47,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2988 transitions. [2023-01-27 23:16:47,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 90.54545454545455) internal successors, (2988), 33 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:47,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:47,588 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:47,588 INFO L175 Difference]: Start difference. First operand has 525 places, 888 transitions, 21721 flow. Second operand 33 states and 2988 transitions. [2023-01-27 23:16:47,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 987 transitions, 24501 flow [2023-01-27 23:16:48,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 987 transitions, 24181 flow, removed 72 selfloop flow, removed 19 redundant places. [2023-01-27 23:16:48,843 INFO L231 Difference]: Finished difference. Result has 543 places, 899 transitions, 22097 flow [2023-01-27 23:16:48,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=21401, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=22097, PETRI_PLACES=543, PETRI_TRANSITIONS=899} [2023-01-27 23:16:48,844 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 522 predicate places. [2023-01-27 23:16:48,844 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 899 transitions, 22097 flow [2023-01-27 23:16:48,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.65517241379311) internal successors, (2513), 29 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:16:48,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:16:48,844 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:16:48,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-27 23:16:49,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-27 23:16:49,049 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:16:49,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:16:49,049 INFO L85 PathProgramCache]: Analyzing trace with hash -259290172, now seen corresponding path program 15 times [2023-01-27 23:16:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:16:49,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121698532] [2023-01-27 23:16:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:16:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:16:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:16:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:49,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:16:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121698532] [2023-01-27 23:16:49,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121698532] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:16:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271281013] [2023-01-27 23:16:49,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:16:49,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:16:49,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:16:49,178 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:16:49,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-27 23:16:49,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:16:49,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:16:49,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:16:49,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:16:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:16:49,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:17:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:17:53,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271281013] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:17:53,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:17:53,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-27 23:17:53,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588178252] [2023-01-27 23:17:53,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:17:53,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 23:17:53,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:17:53,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 23:17:53,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-01-27 23:17:53,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 347 [2023-01-27 23:17:53,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 899 transitions, 22097 flow. Second operand has 18 states, 18 states have (on average 133.66666666666666) internal successors, (2406), 18 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:53,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:17:53,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 347 [2023-01-27 23:17:53,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:17:58,914 INFO L130 PetriNetUnfolder]: 2661/5065 cut-off events. [2023-01-27 23:17:58,915 INFO L131 PetriNetUnfolder]: For 156822/156822 co-relation queries the response was YES. [2023-01-27 23:17:58,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51104 conditions, 5065 events. 2661/5065 cut-off events. For 156822/156822 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 37317 event pairs, 367 based on Foata normal form. 114/5178 useless extension candidates. Maximal degree in co-relation 50856. Up to 2022 conditions per place. [2023-01-27 23:17:58,969 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 500 selfloop transitions, 536 changer transitions 0/1036 dead transitions. [2023-01-27 23:17:58,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1036 transitions, 25911 flow [2023-01-27 23:17:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 23:17:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 23:17:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5094 transitions. [2023-01-27 23:17:58,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396759872264195 [2023-01-27 23:17:58,974 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5094 transitions. [2023-01-27 23:17:58,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5094 transitions. [2023-01-27 23:17:58,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:17:58,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5094 transitions. [2023-01-27 23:17:58,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 137.67567567567568) internal successors, (5094), 37 states have internal predecessors, (5094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:58,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:58,983 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:17:58,983 INFO L175 Difference]: Start difference. First operand has 543 places, 899 transitions, 22097 flow. Second operand 37 states and 5094 transitions. [2023-01-27 23:17:58,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1036 transitions, 25911 flow [2023-01-27 23:18:00,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1036 transitions, 25455 flow, removed 118 selfloop flow, removed 28 redundant places. [2023-01-27 23:18:00,289 INFO L231 Difference]: Finished difference. Result has 556 places, 942 transitions, 24248 flow [2023-01-27 23:18:00,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=21276, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24248, PETRI_PLACES=556, PETRI_TRANSITIONS=942} [2023-01-27 23:18:00,290 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 535 predicate places. [2023-01-27 23:18:00,290 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 942 transitions, 24248 flow [2023-01-27 23:18:00,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.66666666666666) internal successors, (2406), 18 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:18:00,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:18:00,290 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:18:00,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-27 23:18:00,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-27 23:18:00,491 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:18:00,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:18:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1493905089, now seen corresponding path program 12 times [2023-01-27 23:18:00,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:18:00,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342496826] [2023-01-27 23:18:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:18:00,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:18:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:18:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:18:00,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:18:00,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342496826] [2023-01-27 23:18:00,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342496826] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:18:00,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597030400] [2023-01-27 23:18:00,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:18:00,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:18:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:18:00,646 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:18:00,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-27 23:18:00,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 23:18:00,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:18:00,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:18:00,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:18:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:18:01,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:21:44,847 WARN L222 SmtUtils]: Spent 3.71m on a formula simplification. DAG size of input: 4544 DAG size of output: 4318 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-01-27 23:29:02,816 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 23:29:02,816 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 23:29:03,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-27 23:29:03,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown