/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 20:35:53,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 20:35:53,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 20:35:53,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 20:35:53,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 20:35:53,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 20:35:53,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 20:35:53,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 20:35:53,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 20:35:53,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 20:35:53,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 20:35:53,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 20:35:53,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 20:35:53,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 20:35:53,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 20:35:53,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 20:35:53,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 20:35:53,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 20:35:53,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 20:35:53,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 20:35:53,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 20:35:53,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 20:35:53,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 20:35:53,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 20:35:53,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 20:35:53,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 20:35:53,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 20:35:53,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 20:35:53,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 20:35:53,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 20:35:53,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 20:35:53,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 20:35:53,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 20:35:53,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 20:35:53,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 20:35:53,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 20:35:53,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 20:35:53,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 20:35:53,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 20:35:53,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 20:35:53,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 20:35:53,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 20:35:53,831 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 20:35:53,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 20:35:53,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 20:35:53,832 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 20:35:53,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 20:35:53,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 20:35:53,833 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 20:35:53,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 20:35:53,833 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 20:35:53,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 20:35:53,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 20:35:53,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 20:35:53,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 20:35:53,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 20:35:53,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 20:35:53,834 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 20:35:53,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 20:35:53,834 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 20:35:53,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 20:35:53,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 20:35:53,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 20:35:53,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 20:35:53,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 20:35:53,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 20:35:53,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 20:35:53,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 20:35:53,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 20:35:53,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 20:35:53,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 20:35:53,836 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 20:35:53,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 20:35:53,836 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 20:35:53,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 20:35:54,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 20:35:54,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 20:35:54,021 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 20:35:54,024 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 20:35:54,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-01-27 20:35:55,067 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 20:35:55,212 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 20:35:55,212 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2023-01-27 20:35:55,217 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3dcb624/6828bcaa5af74a4ebfbaa08d0fbfb984/FLAG5d2e76b4c [2023-01-27 20:35:55,251 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd3dcb624/6828bcaa5af74a4ebfbaa08d0fbfb984 [2023-01-27 20:35:55,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 20:35:55,254 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 20:35:55,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 20:35:55,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 20:35:55,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 20:35:55,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c22906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55, skipping insertion in model container [2023-01-27 20:35:55,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 20:35:55,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 20:35:55,383 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c[2848,2861] [2023-01-27 20:35:55,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 20:35:55,395 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 20:35:55,410 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c[2848,2861] [2023-01-27 20:35:55,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 20:35:55,422 INFO L208 MainTranslator]: Completed translation [2023-01-27 20:35:55,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55 WrapperNode [2023-01-27 20:35:55,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 20:35:55,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 20:35:55,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 20:35:55,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 20:35:55,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,451 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 134 [2023-01-27 20:35:55,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 20:35:55,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 20:35:55,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 20:35:55,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 20:35:55,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,480 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 20:35:55,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 20:35:55,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 20:35:55,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 20:35:55,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (1/1) ... [2023-01-27 20:35:55,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 20:35:55,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:35:55,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 20:35:55,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 20:35:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 20:35:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 20:35:55,649 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 20:35:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 20:35:55,649 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 20:35:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 20:35:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 20:35:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 20:35:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 20:35:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 20:35:55,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 20:35:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 20:35:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 20:35:55,650 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 20:35:55,812 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 20:35:55,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 20:35:56,192 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 20:35:56,199 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 20:35:56,199 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-27 20:35:56,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 08:35:56 BoogieIcfgContainer [2023-01-27 20:35:56,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 20:35:56,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 20:35:56,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 20:35:56,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 20:35:56,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 08:35:55" (1/3) ... [2023-01-27 20:35:56,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64805f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 08:35:56, skipping insertion in model container [2023-01-27 20:35:56,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 08:35:55" (2/3) ... [2023-01-27 20:35:56,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64805f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 08:35:56, skipping insertion in model container [2023-01-27 20:35:56,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 08:35:56" (3/3) ... [2023-01-27 20:35:56,206 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-01-27 20:35:56,217 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 20:35:56,218 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 20:35:56,218 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 20:35:56,333 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 20:35:56,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 213 transitions, 442 flow [2023-01-27 20:35:56,442 INFO L130 PetriNetUnfolder]: 21/211 cut-off events. [2023-01-27 20:35:56,443 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:35:56,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 211 events. 21/211 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2023-01-27 20:35:56,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 213 transitions, 442 flow [2023-01-27 20:35:56,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 203 transitions, 418 flow [2023-01-27 20:35:56,462 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 20:35:56,482 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 203 transitions, 418 flow [2023-01-27 20:35:56,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 203 transitions, 418 flow [2023-01-27 20:35:56,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 203 transitions, 418 flow [2023-01-27 20:35:56,512 INFO L130 PetriNetUnfolder]: 21/203 cut-off events. [2023-01-27 20:35:56,512 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:35:56,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 203 events. 21/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 229 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2023-01-27 20:35:56,514 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-01-27 20:36:01,248 INFO L134 LiptonReduction]: Checked pairs total: 3067 [2023-01-27 20:36:01,248 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-01-27 20:36:01,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 20:36:01,276 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;@4f0769b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 20:36:01,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 20:36:01,285 INFO L130 PetriNetUnfolder]: 7/24 cut-off events. [2023-01-27 20:36:01,285 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 20:36:01,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:01,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:01,286 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 20:36:01,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -266999657, now seen corresponding path program 1 times [2023-01-27 20:36:01,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:01,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521143757] [2023-01-27 20:36:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:01,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:01,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521143757] [2023-01-27 20:36:01,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521143757] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:01,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:01,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 20:36:01,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570981332] [2023-01-27 20:36:01,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:01,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:36:01,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:36:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:36:01,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-01-27 20:36:01,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:01,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:01,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-01-27 20:36:01,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:01,975 INFO L130 PetriNetUnfolder]: 112/192 cut-off events. [2023-01-27 20:36:01,976 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-01-27 20:36:01,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 192 events. 112/192 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 556 event pairs, 51 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 338. Up to 151 conditions per place. [2023-01-27 20:36:01,979 INFO L137 encePairwiseOnDemand]: 431/435 looper letters, 35 selfloop transitions, 1 changer transitions 5/41 dead transitions. [2023-01-27 20:36:01,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 188 flow [2023-01-27 20:36:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:36:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:36:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 755 transitions. [2023-01-27 20:36:01,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339080459770115 [2023-01-27 20:36:01,999 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 755 transitions. [2023-01-27 20:36:01,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 755 transitions. [2023-01-27 20:36:02,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:02,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 755 transitions. [2023-01-27 20:36:02,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 435.0) internal successors, (2175), 5 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,014 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 435.0) internal successors, (2175), 5 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,016 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 62 flow. Second operand 4 states and 755 transitions. [2023-01-27 20:36:02,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 41 transitions, 188 flow [2023-01-27 20:36:02,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 41 transitions, 172 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 20:36:02,020 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 63 flow [2023-01-27 20:36:02,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-01-27 20:36:02,025 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2023-01-27 20:36:02,026 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 63 flow [2023-01-27 20:36:02,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:02,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:02,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 20:36:02,027 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 20:36:02,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash 541242839, now seen corresponding path program 2 times [2023-01-27 20:36:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:02,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127002148] [2023-01-27 20:36:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:02,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:02,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:02,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127002148] [2023-01-27 20:36:02,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127002148] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:02,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:02,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 20:36:02,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859256128] [2023-01-27 20:36:02,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:02,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 20:36:02,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 20:36:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 20:36:02,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 435 [2023-01-27 20:36:02,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:02,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 435 [2023-01-27 20:36:02,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:02,366 INFO L130 PetriNetUnfolder]: 119/215 cut-off events. [2023-01-27 20:36:02,367 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-01-27 20:36:02,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 215 events. 119/215 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 686 event pairs, 67 based on Foata normal form. 5/172 useless extension candidates. Maximal degree in co-relation 466. Up to 179 conditions per place. [2023-01-27 20:36:02,369 INFO L137 encePairwiseOnDemand]: 431/435 looper letters, 31 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2023-01-27 20:36:02,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 179 flow [2023-01-27 20:36:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 20:36:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 20:36:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 753 transitions. [2023-01-27 20:36:02,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43275862068965515 [2023-01-27 20:36:02,371 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 753 transitions. [2023-01-27 20:36:02,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 753 transitions. [2023-01-27 20:36:02,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:02,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 753 transitions. [2023-01-27 20:36:02,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.25) internal successors, (753), 4 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 435.0) internal successors, (2175), 5 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,375 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 435.0) internal successors, (2175), 5 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,375 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 63 flow. Second operand 4 states and 753 transitions. [2023-01-27 20:36:02,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 179 flow [2023-01-27 20:36:02,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 173 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-27 20:36:02,379 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 69 flow [2023-01-27 20:36:02,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-01-27 20:36:02,379 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-01-27 20:36:02,379 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 69 flow [2023-01-27 20:36:02,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:02,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:02,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 20:36:02,380 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 20:36:02,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:02,382 INFO L85 PathProgramCache]: Analyzing trace with hash -682121893, now seen corresponding path program 1 times [2023-01-27 20:36:02,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:02,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367108509] [2023-01-27 20:36:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:02,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:02,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:02,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367108509] [2023-01-27 20:36:02,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367108509] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:02,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:02,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 20:36:02,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332918936] [2023-01-27 20:36:02,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:02,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 20:36:02,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 20:36:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 20:36:02,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 435 [2023-01-27 20:36:02,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:02,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 435 [2023-01-27 20:36:02,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:02,456 INFO L130 PetriNetUnfolder]: 87/154 cut-off events. [2023-01-27 20:36:02,456 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2023-01-27 20:36:02,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 154 events. 87/154 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 408 event pairs, 24 based on Foata normal form. 16/138 useless extension candidates. Maximal degree in co-relation 348. Up to 133 conditions per place. [2023-01-27 20:36:02,458 INFO L137 encePairwiseOnDemand]: 431/435 looper letters, 26 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2023-01-27 20:36:02,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 153 flow [2023-01-27 20:36:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 20:36:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 20:36:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-01-27 20:36:02,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559386973180077 [2023-01-27 20:36:02,461 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-01-27 20:36:02,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-01-27 20:36:02,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:02,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-01-27 20:36:02,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,466 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 435.0) internal successors, (1740), 4 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,466 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 69 flow. Second operand 3 states and 595 transitions. [2023-01-27 20:36:02,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 153 flow [2023-01-27 20:36:02,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 150 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-27 20:36:02,469 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 72 flow [2023-01-27 20:36:02,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-01-27 20:36:02,470 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-01-27 20:36:02,473 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 72 flow [2023-01-27 20:36:02,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:02,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:02,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 20:36:02,474 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 20:36:02,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:02,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1884163200, now seen corresponding path program 1 times [2023-01-27 20:36:02,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:02,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241132377] [2023-01-27 20:36:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:02,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:02,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:02,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241132377] [2023-01-27 20:36:02,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241132377] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:02,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:02,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-27 20:36:02,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999736011] [2023-01-27 20:36:02,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:02,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:36:02,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:36:02,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:36:02,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:02,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 72 flow. Second operand has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:02,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:02,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:02,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:03,334 INFO L130 PetriNetUnfolder]: 268/494 cut-off events. [2023-01-27 20:36:03,334 INFO L131 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2023-01-27 20:36:03,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 494 events. 268/494 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2010 event pairs, 43 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 395. Up to 100 conditions per place. [2023-01-27 20:36:03,337 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 111 selfloop transitions, 25 changer transitions 22/158 dead transitions. [2023-01-27 20:36:03,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 158 transitions, 747 flow [2023-01-27 20:36:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 20:36:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 20:36:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2660 transitions. [2023-01-27 20:36:03,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3397190293742018 [2023-01-27 20:36:03,343 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2660 transitions. [2023-01-27 20:36:03,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2660 transitions. [2023-01-27 20:36:03,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:03,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2660 transitions. [2023-01-27 20:36:03,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 147.77777777777777) internal successors, (2660), 18 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:03,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 435.0) internal successors, (8265), 19 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:03,363 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 435.0) internal successors, (8265), 19 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:03,364 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 72 flow. Second operand 18 states and 2660 transitions. [2023-01-27 20:36:03,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 158 transitions, 747 flow [2023-01-27 20:36:03,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 158 transitions, 707 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-01-27 20:36:03,369 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 252 flow [2023-01-27 20:36:03,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=252, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-01-27 20:36:03,370 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 28 predicate places. [2023-01-27 20:36:03,370 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 252 flow [2023-01-27 20:36:03,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:03,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:03,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:03,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 20:36:03,371 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 20:36:03,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash 839378742, now seen corresponding path program 2 times [2023-01-27 20:36:03,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:03,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365119064] [2023-01-27 20:36:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:03,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:03,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365119064] [2023-01-27 20:36:03,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365119064] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:03,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:03,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-27 20:36:03,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931950461] [2023-01-27 20:36:03,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:03,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:36:03,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:03,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:36:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:36:03,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:03,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 252 flow. Second operand has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:03,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:03,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:03,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:04,151 INFO L130 PetriNetUnfolder]: 274/499 cut-off events. [2023-01-27 20:36:04,151 INFO L131 PetriNetUnfolder]: For 1057/1057 co-relation queries the response was YES. [2023-01-27 20:36:04,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1686 conditions, 499 events. 274/499 cut-off events. For 1057/1057 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1987 event pairs, 51 based on Foata normal form. 13/485 useless extension candidates. Maximal degree in co-relation 1650. Up to 209 conditions per place. [2023-01-27 20:36:04,154 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 72 selfloop transitions, 23 changer transitions 10/105 dead transitions. [2023-01-27 20:36:04,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 676 flow [2023-01-27 20:36:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:36:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:36:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1622 transitions. [2023-01-27 20:36:04,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33897596656217344 [2023-01-27 20:36:04,157 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1622 transitions. [2023-01-27 20:36:04,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1622 transitions. [2023-01-27 20:36:04,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:04,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1622 transitions. [2023-01-27 20:36:04,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 147.45454545454547) internal successors, (1622), 11 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:04,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:04,190 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:04,190 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 252 flow. Second operand 11 states and 1622 transitions. [2023-01-27 20:36:04,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 676 flow [2023-01-27 20:36:04,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 105 transitions, 630 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-01-27 20:36:04,194 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 361 flow [2023-01-27 20:36:04,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=361, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-01-27 20:36:04,194 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2023-01-27 20:36:04,195 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 361 flow [2023-01-27 20:36:04,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:04,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:04,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:04,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 20:36:04,195 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 20:36:04,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1337186352, now seen corresponding path program 3 times [2023-01-27 20:36:04,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:04,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788858060] [2023-01-27 20:36:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:04,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:04,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:04,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788858060] [2023-01-27 20:36:04,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788858060] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:04,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:04,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-27 20:36:04,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174495497] [2023-01-27 20:36:04,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:04,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:36:04,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:04,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:36:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:36:04,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:04,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 361 flow. Second operand has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:04,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:04,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:04,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:04,963 INFO L130 PetriNetUnfolder]: 302/562 cut-off events. [2023-01-27 20:36:04,964 INFO L131 PetriNetUnfolder]: For 1148/1148 co-relation queries the response was YES. [2023-01-27 20:36:04,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2046 conditions, 562 events. 302/562 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2407 event pairs, 31 based on Foata normal form. 14/543 useless extension candidates. Maximal degree in co-relation 1828. Up to 99 conditions per place. [2023-01-27 20:36:04,967 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 136 selfloop transitions, 33 changer transitions 14/183 dead transitions. [2023-01-27 20:36:04,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 183 transitions, 1160 flow [2023-01-27 20:36:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 20:36:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 20:36:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2824 transitions. [2023-01-27 20:36:04,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34168179068360555 [2023-01-27 20:36:04,972 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2824 transitions. [2023-01-27 20:36:04,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2824 transitions. [2023-01-27 20:36:04,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:04,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2824 transitions. [2023-01-27 20:36:04,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 148.6315789473684) internal successors, (2824), 19 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:04,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 435.0) internal successors, (8700), 20 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:04,985 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 435.0) internal successors, (8700), 20 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:04,985 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 361 flow. Second operand 19 states and 2824 transitions. [2023-01-27 20:36:04,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 183 transitions, 1160 flow [2023-01-27 20:36:04,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 183 transitions, 998 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-01-27 20:36:04,991 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 403 flow [2023-01-27 20:36:04,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=403, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2023-01-27 20:36:04,991 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-01-27 20:36:04,992 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 403 flow [2023-01-27 20:36:04,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:04,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:04,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:04,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 20:36:04,992 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 20:36:04,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:04,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1557044638, now seen corresponding path program 4 times [2023-01-27 20:36:04,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:04,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400699470] [2023-01-27 20:36:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:04,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:05,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:05,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400699470] [2023-01-27 20:36:05,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400699470] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:05,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:05,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-27 20:36:05,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320920813] [2023-01-27 20:36:05,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:05,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:36:05,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:36:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:36:05,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:05,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 403 flow. Second operand has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:05,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:05,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:05,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:05,649 INFO L130 PetriNetUnfolder]: 281/536 cut-off events. [2023-01-27 20:36:05,650 INFO L131 PetriNetUnfolder]: For 1062/1062 co-relation queries the response was YES. [2023-01-27 20:36:05,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 536 events. 281/536 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2320 event pairs, 68 based on Foata normal form. 19/522 useless extension candidates. Maximal degree in co-relation 1867. Up to 257 conditions per place. [2023-01-27 20:36:05,652 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 73 selfloop transitions, 26 changer transitions 9/108 dead transitions. [2023-01-27 20:36:05,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 760 flow [2023-01-27 20:36:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:36:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:36:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1619 transitions. [2023-01-27 20:36:05,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33834900731452455 [2023-01-27 20:36:05,656 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1619 transitions. [2023-01-27 20:36:05,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1619 transitions. [2023-01-27 20:36:05,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:05,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1619 transitions. [2023-01-27 20:36:05,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 147.1818181818182) internal successors, (1619), 11 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:05,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:05,663 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:05,664 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 403 flow. Second operand 11 states and 1619 transitions. [2023-01-27 20:36:05,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 760 flow [2023-01-27 20:36:05,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 694 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-01-27 20:36:05,668 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 448 flow [2023-01-27 20:36:05,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=448, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2023-01-27 20:36:05,668 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 52 predicate places. [2023-01-27 20:36:05,668 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 448 flow [2023-01-27 20:36:05,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:05,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:05,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:05,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 20:36:05,669 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 20:36:05,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:05,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1332429184, now seen corresponding path program 5 times [2023-01-27 20:36:05,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:05,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180428657] [2023-01-27 20:36:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:05,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:06,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:06,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180428657] [2023-01-27 20:36:06,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180428657] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:06,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:06,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-27 20:36:06,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130022225] [2023-01-27 20:36:06,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:06,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:36:06,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:06,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:36:06,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:36:06,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:06,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 448 flow. Second operand has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:06,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:06,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:06,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:06,421 INFO L130 PetriNetUnfolder]: 270/536 cut-off events. [2023-01-27 20:36:06,422 INFO L131 PetriNetUnfolder]: For 1618/1618 co-relation queries the response was YES. [2023-01-27 20:36:06,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2014 conditions, 536 events. 270/536 cut-off events. For 1618/1618 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2466 event pairs, 49 based on Foata normal form. 20/519 useless extension candidates. Maximal degree in co-relation 1863. Up to 143 conditions per place. [2023-01-27 20:36:06,425 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 103 selfloop transitions, 34 changer transitions 7/144 dead transitions. [2023-01-27 20:36:06,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 144 transitions, 996 flow [2023-01-27 20:36:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:36:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:36:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2213 transitions. [2023-01-27 20:36:06,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33915708812260537 [2023-01-27 20:36:06,429 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2213 transitions. [2023-01-27 20:36:06,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2213 transitions. [2023-01-27 20:36:06,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:06,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2213 transitions. [2023-01-27 20:36:06,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 147.53333333333333) internal successors, (2213), 15 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:06,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:06,439 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:06,439 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 448 flow. Second operand 15 states and 2213 transitions. [2023-01-27 20:36:06,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 144 transitions, 996 flow [2023-01-27 20:36:06,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 144 transitions, 906 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-01-27 20:36:06,445 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 530 flow [2023-01-27 20:36:06,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=530, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-01-27 20:36:06,445 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 61 predicate places. [2023-01-27 20:36:06,445 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 530 flow [2023-01-27 20:36:06,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:06,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:06,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:06,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 20:36:06,447 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 20:36:06,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:06,447 INFO L85 PathProgramCache]: Analyzing trace with hash 481879698, now seen corresponding path program 6 times [2023-01-27 20:36:06,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:06,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720511789] [2023-01-27 20:36:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:06,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:06,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:06,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720511789] [2023-01-27 20:36:06,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720511789] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:06,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:06,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-27 20:36:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836910902] [2023-01-27 20:36:06,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:06,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:36:06,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:36:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:36:06,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:06,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 530 flow. Second operand has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:06,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:06,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:06,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:07,594 INFO L130 PetriNetUnfolder]: 264/518 cut-off events. [2023-01-27 20:36:07,594 INFO L131 PetriNetUnfolder]: For 1242/1242 co-relation queries the response was YES. [2023-01-27 20:36:07,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1980 conditions, 518 events. 264/518 cut-off events. For 1242/1242 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2306 event pairs, 51 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 1938. Up to 87 conditions per place. [2023-01-27 20:36:07,597 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 134 selfloop transitions, 36 changer transitions 10/180 dead transitions. [2023-01-27 20:36:07,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 1173 flow [2023-01-27 20:36:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 20:36:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 20:36:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2955 transitions. [2023-01-27 20:36:07,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3396551724137931 [2023-01-27 20:36:07,604 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2955 transitions. [2023-01-27 20:36:07,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2955 transitions. [2023-01-27 20:36:07,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:07,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2955 transitions. [2023-01-27 20:36:07,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 147.75) internal successors, (2955), 20 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:07,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 435.0) internal successors, (9135), 21 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:07,618 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 435.0) internal successors, (9135), 21 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:07,618 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 530 flow. Second operand 20 states and 2955 transitions. [2023-01-27 20:36:07,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 1173 flow [2023-01-27 20:36:07,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 180 transitions, 1095 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-01-27 20:36:07,624 INFO L231 Difference]: Finished difference. Result has 97 places, 69 transitions, 539 flow [2023-01-27 20:36:07,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=539, PETRI_PLACES=97, PETRI_TRANSITIONS=69} [2023-01-27 20:36:07,625 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 72 predicate places. [2023-01-27 20:36:07,625 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 69 transitions, 539 flow [2023-01-27 20:36:07,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:07,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:07,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:07,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 20:36:07,626 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 20:36:07,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1377073745, now seen corresponding path program 1 times [2023-01-27 20:36:07,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:07,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660499698] [2023-01-27 20:36:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:07,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:07,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660499698] [2023-01-27 20:36:07,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660499698] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353851504] [2023-01-27 20:36:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:07,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:07,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:07,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:36:07,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 20:36:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 20:36:08,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:08,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:08,440 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 112 treesize of output 77 [2023-01-27 20:36:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:08,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:08,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:08,625 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 158 treesize of output 122 [2023-01-27 20:36:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:09,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353851504] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:36:09,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:36:09,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-01-27 20:36:09,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271268924] [2023-01-27 20:36:09,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:36:09,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:36:09,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:09,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:36:09,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-01-27 20:36:09,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:09,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 69 transitions, 539 flow. Second operand has 26 states, 26 states have (on average 140.84615384615384) internal successors, (3662), 26 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:09,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:09,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:09,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:11,541 INFO L130 PetriNetUnfolder]: 636/1206 cut-off events. [2023-01-27 20:36:11,542 INFO L131 PetriNetUnfolder]: For 2965/2965 co-relation queries the response was YES. [2023-01-27 20:36:11,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4554 conditions, 1206 events. 636/1206 cut-off events. For 2965/2965 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6509 event pairs, 117 based on Foata normal form. 30/1156 useless extension candidates. Maximal degree in co-relation 4475. Up to 223 conditions per place. [2023-01-27 20:36:11,548 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 200 selfloop transitions, 74 changer transitions 15/289 dead transitions. [2023-01-27 20:36:11,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 289 transitions, 2139 flow [2023-01-27 20:36:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 20:36:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 20:36:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4834 transitions. [2023-01-27 20:36:11,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3367467781260885 [2023-01-27 20:36:11,554 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4834 transitions. [2023-01-27 20:36:11,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4834 transitions. [2023-01-27 20:36:11,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:11,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4834 transitions. [2023-01-27 20:36:11,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 146.4848484848485) internal successors, (4834), 33 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:11,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 435.0) internal successors, (14790), 34 states have internal predecessors, (14790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:11,587 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 435.0) internal successors, (14790), 34 states have internal predecessors, (14790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:11,587 INFO L175 Difference]: Start difference. First operand has 97 places, 69 transitions, 539 flow. Second operand 33 states and 4834 transitions. [2023-01-27 20:36:11,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 289 transitions, 2139 flow [2023-01-27 20:36:11,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 289 transitions, 1973 flow, removed 21 selfloop flow, removed 18 redundant places. [2023-01-27 20:36:11,617 INFO L231 Difference]: Finished difference. Result has 122 places, 113 transitions, 985 flow [2023-01-27 20:36:11,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=985, PETRI_PLACES=122, PETRI_TRANSITIONS=113} [2023-01-27 20:36:11,618 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 97 predicate places. [2023-01-27 20:36:11,618 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 113 transitions, 985 flow [2023-01-27 20:36:11,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 140.84615384615384) internal successors, (3662), 26 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:11,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:11,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:11,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 20:36:11,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-27 20:36:11,824 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 20:36:11,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:11,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1571800870, now seen corresponding path program 1 times [2023-01-27 20:36:11,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:11,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373338604] [2023-01-27 20:36:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:11,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:12,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:12,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373338604] [2023-01-27 20:36:12,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373338604] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:12,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331970958] [2023-01-27 20:36:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:12,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:12,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:12,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:36:12,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 20:36:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:12,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 20:36:12,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:12,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:12,318 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 112 treesize of output 77 [2023-01-27 20:36:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:12,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:12,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:12,445 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 158 treesize of output 122 [2023-01-27 20:36:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:12,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331970958] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:12,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:12,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 21 [2023-01-27 20:36:12,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547875006] [2023-01-27 20:36:12,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:12,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:36:12,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:12,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:36:12,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:36:12,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:12,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 113 transitions, 985 flow. Second operand has 9 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:12,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:12,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:12,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:13,589 INFO L130 PetriNetUnfolder]: 628/1178 cut-off events. [2023-01-27 20:36:13,589 INFO L131 PetriNetUnfolder]: For 5762/5762 co-relation queries the response was YES. [2023-01-27 20:36:13,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5068 conditions, 1178 events. 628/1178 cut-off events. For 5762/5762 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6225 event pairs, 117 based on Foata normal form. 2/1101 useless extension candidates. Maximal degree in co-relation 4988. Up to 313 conditions per place. [2023-01-27 20:36:13,597 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 100 selfloop transitions, 60 changer transitions 10/170 dead transitions. [2023-01-27 20:36:13,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 170 transitions, 1511 flow [2023-01-27 20:36:13,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:36:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:36:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2048 transitions. [2023-01-27 20:36:13,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3362889983579639 [2023-01-27 20:36:13,601 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2048 transitions. [2023-01-27 20:36:13,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2048 transitions. [2023-01-27 20:36:13,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:13,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2048 transitions. [2023-01-27 20:36:13,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 146.28571428571428) internal successors, (2048), 14 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:13,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:13,607 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:13,608 INFO L175 Difference]: Start difference. First operand has 122 places, 113 transitions, 985 flow. Second operand 14 states and 2048 transitions. [2023-01-27 20:36:13,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 170 transitions, 1511 flow [2023-01-27 20:36:13,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 170 transitions, 1355 flow, removed 57 selfloop flow, removed 14 redundant places. [2023-01-27 20:36:13,631 INFO L231 Difference]: Finished difference. Result has 120 places, 112 transitions, 957 flow [2023-01-27 20:36:13,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=957, PETRI_PLACES=120, PETRI_TRANSITIONS=112} [2023-01-27 20:36:13,631 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 95 predicate places. [2023-01-27 20:36:13,631 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 112 transitions, 957 flow [2023-01-27 20:36:13,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:13,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:13,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:13,644 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 20:36:13,837 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,SelfDestructingSolverStorable10 [2023-01-27 20:36:13,837 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 20:36:13,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:13,838 INFO L85 PathProgramCache]: Analyzing trace with hash -525334967, now seen corresponding path program 2 times [2023-01-27 20:36:13,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:13,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457545388] [2023-01-27 20:36:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:13,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:14,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:14,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457545388] [2023-01-27 20:36:14,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457545388] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:14,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614589376] [2023-01-27 20:36:14,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:36:14,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:14,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:36:14,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 20:36:14,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:36:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:14,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 20:36:14,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:14,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:14,252 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 112 treesize of output 77 [2023-01-27 20:36:14,273 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 20:36:14,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:36:14,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614589376] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:14,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:36:14,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-01-27 20:36:14,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423737204] [2023-01-27 20:36:14,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:14,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:36:14,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:14,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:36:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-01-27 20:36:14,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:14,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 112 transitions, 957 flow. Second operand has 9 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:14,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:14,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:14,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:14,484 INFO L130 PetriNetUnfolder]: 620/1151 cut-off events. [2023-01-27 20:36:14,484 INFO L131 PetriNetUnfolder]: For 4594/4594 co-relation queries the response was YES. [2023-01-27 20:36:14,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4855 conditions, 1151 events. 620/1151 cut-off events. For 4594/4594 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5934 event pairs, 129 based on Foata normal form. 1/1074 useless extension candidates. Maximal degree in co-relation 4803. Up to 563 conditions per place. [2023-01-27 20:36:14,491 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 84 selfloop transitions, 55 changer transitions 11/150 dead transitions. [2023-01-27 20:36:14,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 150 transitions, 1437 flow [2023-01-27 20:36:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:36:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:36:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1326 transitions. [2023-01-27 20:36:14,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33869731800766284 [2023-01-27 20:36:14,493 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1326 transitions. [2023-01-27 20:36:14,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1326 transitions. [2023-01-27 20:36:14,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:14,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1326 transitions. [2023-01-27 20:36:14,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.33333333333334) internal successors, (1326), 9 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:14,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:14,497 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:14,497 INFO L175 Difference]: Start difference. First operand has 120 places, 112 transitions, 957 flow. Second operand 9 states and 1326 transitions. [2023-01-27 20:36:14,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 150 transitions, 1437 flow [2023-01-27 20:36:14,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 150 transitions, 1359 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-01-27 20:36:14,509 INFO L231 Difference]: Finished difference. Result has 117 places, 112 transitions, 998 flow [2023-01-27 20:36:14,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=998, PETRI_PLACES=117, PETRI_TRANSITIONS=112} [2023-01-27 20:36:14,510 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 92 predicate places. [2023-01-27 20:36:14,510 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 112 transitions, 998 flow [2023-01-27 20:36:14,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:14,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:14,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:14,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 20:36:14,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:14,721 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 20:36:14,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:14,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2145988610, now seen corresponding path program 2 times [2023-01-27 20:36:14,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:14,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085469095] [2023-01-27 20:36:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:14,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:15,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:15,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085469095] [2023-01-27 20:36:15,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085469095] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:15,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760873513] [2023-01-27 20:36:15,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:36:15,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:15,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:36:15,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 20:36:15,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:36:15,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:15,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 20:36:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:15,283 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 20:36:15,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:36:15,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760873513] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:15,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:36:15,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-01-27 20:36:15,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471857550] [2023-01-27 20:36:15,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:15,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 20:36:15,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 20:36:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-01-27 20:36:15,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:15,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 112 transitions, 998 flow. Second operand has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:15,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:15,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:15,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:15,506 INFO L130 PetriNetUnfolder]: 614/1134 cut-off events. [2023-01-27 20:36:15,507 INFO L131 PetriNetUnfolder]: For 4984/4984 co-relation queries the response was YES. [2023-01-27 20:36:15,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4895 conditions, 1134 events. 614/1134 cut-off events. For 4984/4984 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5819 event pairs, 142 based on Foata normal form. 2/1058 useless extension candidates. Maximal degree in co-relation 4838. Up to 559 conditions per place. [2023-01-27 20:36:15,513 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 110 selfloop transitions, 46 changer transitions 9/165 dead transitions. [2023-01-27 20:36:15,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 165 transitions, 1474 flow [2023-01-27 20:36:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:36:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:36:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1632 transitions. [2023-01-27 20:36:15,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34106583072100316 [2023-01-27 20:36:15,515 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1632 transitions. [2023-01-27 20:36:15,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1632 transitions. [2023-01-27 20:36:15,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:15,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1632 transitions. [2023-01-27 20:36:15,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 148.36363636363637) internal successors, (1632), 11 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:15,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:15,522 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:15,522 INFO L175 Difference]: Start difference. First operand has 117 places, 112 transitions, 998 flow. Second operand 11 states and 1632 transitions. [2023-01-27 20:36:15,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 165 transitions, 1474 flow [2023-01-27 20:36:15,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 165 transitions, 1357 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-01-27 20:36:15,538 INFO L231 Difference]: Finished difference. Result has 119 places, 109 transitions, 960 flow [2023-01-27 20:36:15,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=960, PETRI_PLACES=119, PETRI_TRANSITIONS=109} [2023-01-27 20:36:15,540 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 94 predicate places. [2023-01-27 20:36:15,540 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 960 flow [2023-01-27 20:36:15,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:15,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:15,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:15,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-27 20:36:15,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:15,745 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 20:36:15,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:15,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1204862359, now seen corresponding path program 3 times [2023-01-27 20:36:15,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:15,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524407690] [2023-01-27 20:36:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:15,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:16,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:16,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524407690] [2023-01-27 20:36:16,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524407690] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:16,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990259903] [2023-01-27 20:36:16,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:36:16,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:16,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:16,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:36:16,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 20:36:16,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-27 20:36:16,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 20:36:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:16,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:16,431 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 108 treesize of output 73 [2023-01-27 20:36:16,479 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 20:36:16,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:36:16,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990259903] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:16,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:36:16,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-01-27 20:36:16,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407150374] [2023-01-27 20:36:16,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:16,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:36:16,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:36:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-01-27 20:36:16,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:16,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 109 transitions, 960 flow. Second operand has 9 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:16,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:16,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:16,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:16,759 INFO L130 PetriNetUnfolder]: 606/1107 cut-off events. [2023-01-27 20:36:16,760 INFO L131 PetriNetUnfolder]: For 4463/4463 co-relation queries the response was YES. [2023-01-27 20:36:16,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4831 conditions, 1107 events. 606/1107 cut-off events. For 4463/4463 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5523 event pairs, 109 based on Foata normal form. 1/1030 useless extension candidates. Maximal degree in co-relation 4667. Up to 504 conditions per place. [2023-01-27 20:36:16,766 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 84 selfloop transitions, 57 changer transitions 5/146 dead transitions. [2023-01-27 20:36:16,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 146 transitions, 1397 flow [2023-01-27 20:36:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:36:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:36:16,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1328 transitions. [2023-01-27 20:36:16,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392081736909323 [2023-01-27 20:36:16,768 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1328 transitions. [2023-01-27 20:36:16,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1328 transitions. [2023-01-27 20:36:16,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:16,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1328 transitions. [2023-01-27 20:36:16,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.55555555555554) internal successors, (1328), 9 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:16,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:16,772 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:16,773 INFO L175 Difference]: Start difference. First operand has 119 places, 109 transitions, 960 flow. Second operand 9 states and 1328 transitions. [2023-01-27 20:36:16,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 146 transitions, 1397 flow [2023-01-27 20:36:16,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 146 transitions, 1268 flow, removed 2 selfloop flow, removed 13 redundant places. [2023-01-27 20:36:16,785 INFO L231 Difference]: Finished difference. Result has 113 places, 108 transitions, 942 flow [2023-01-27 20:36:16,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=942, PETRI_PLACES=113, PETRI_TRANSITIONS=108} [2023-01-27 20:36:16,785 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 88 predicate places. [2023-01-27 20:36:16,785 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 108 transitions, 942 flow [2023-01-27 20:36:16,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:16,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:16,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:16,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 20:36:16,990 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,SelfDestructingSolverStorable13 [2023-01-27 20:36:16,997 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 20:36:17,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:17,000 INFO L85 PathProgramCache]: Analyzing trace with hash -410144759, now seen corresponding path program 4 times [2023-01-27 20:36:17,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:17,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392731732] [2023-01-27 20:36:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:17,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:17,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:17,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392731732] [2023-01-27 20:36:17,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392731732] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:17,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625697191] [2023-01-27 20:36:17,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:36:17,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:17,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:36:17,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 20:36:17,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:36:17,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:17,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2023-01-27 20:36:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:17,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:17,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:17,587 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 158 treesize of output 122 [2023-01-27 20:36:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:18,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625697191] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:18,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:18,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2023-01-27 20:36:18,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266329010] [2023-01-27 20:36:18,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:18,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 20:36:18,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 20:36:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-01-27 20:36:18,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:18,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 108 transitions, 942 flow. Second operand has 10 states, 10 states have (on average 140.6) internal successors, (1406), 10 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:18,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:18,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:18,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:18,820 INFO L130 PetriNetUnfolder]: 576/1077 cut-off events. [2023-01-27 20:36:18,820 INFO L131 PetriNetUnfolder]: For 4379/4379 co-relation queries the response was YES. [2023-01-27 20:36:18,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4424 conditions, 1077 events. 576/1077 cut-off events. For 4379/4379 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5475 event pairs, 140 based on Foata normal form. 29/1028 useless extension candidates. Maximal degree in co-relation 4372. Up to 316 conditions per place. [2023-01-27 20:36:18,827 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 100 selfloop transitions, 62 changer transitions 9/171 dead transitions. [2023-01-27 20:36:18,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1536 flow [2023-01-27 20:36:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:36:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:36:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1913 transitions. [2023-01-27 20:36:18,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3382847038019452 [2023-01-27 20:36:18,829 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1913 transitions. [2023-01-27 20:36:18,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1913 transitions. [2023-01-27 20:36:18,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:18,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1913 transitions. [2023-01-27 20:36:18,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 147.15384615384616) internal successors, (1913), 13 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:18,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 435.0) internal successors, (6090), 14 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:18,835 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 435.0) internal successors, (6090), 14 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:18,835 INFO L175 Difference]: Start difference. First operand has 113 places, 108 transitions, 942 flow. Second operand 13 states and 1913 transitions. [2023-01-27 20:36:18,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1536 flow [2023-01-27 20:36:18,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 171 transitions, 1406 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-01-27 20:36:18,847 INFO L231 Difference]: Finished difference. Result has 123 places, 110 transitions, 1060 flow [2023-01-27 20:36:18,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1060, PETRI_PLACES=123, PETRI_TRANSITIONS=110} [2023-01-27 20:36:18,847 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 98 predicate places. [2023-01-27 20:36:18,847 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 110 transitions, 1060 flow [2023-01-27 20:36:18,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.6) internal successors, (1406), 10 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:18,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:18,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:18,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 20:36:19,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 20:36:19,052 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 20:36:19,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:19,053 INFO L85 PathProgramCache]: Analyzing trace with hash 938212337, now seen corresponding path program 5 times [2023-01-27 20:36:19,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:19,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127912695] [2023-01-27 20:36:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:19,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:19,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127912695] [2023-01-27 20:36:19,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127912695] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849989389] [2023-01-27 20:36:19,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:36:19,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:19,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:19,241 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:36:19,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 20:36:19,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:36:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:19,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 20:36:19,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:19,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:19,494 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 108 treesize of output 73 [2023-01-27 20:36:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:19,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:19,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:19,764 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 158 treesize of output 122 [2023-01-27 20:36:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:19,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849989389] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:36:19,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:36:19,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-01-27 20:36:19,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740278261] [2023-01-27 20:36:19,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:36:19,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:36:19,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:19,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:36:19,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-01-27 20:36:19,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:19,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 110 transitions, 1060 flow. Second operand has 26 states, 26 states have (on average 140.84615384615384) internal successors, (3662), 26 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:19,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:19,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:19,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:21,447 INFO L130 PetriNetUnfolder]: 592/1122 cut-off events. [2023-01-27 20:36:21,447 INFO L131 PetriNetUnfolder]: For 5303/5303 co-relation queries the response was YES. [2023-01-27 20:36:21,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4784 conditions, 1122 events. 592/1122 cut-off events. For 5303/5303 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5913 event pairs, 140 based on Foata normal form. 2/1038 useless extension candidates. Maximal degree in co-relation 4725. Up to 186 conditions per place. [2023-01-27 20:36:21,457 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 187 selfloop transitions, 73 changer transitions 10/270 dead transitions. [2023-01-27 20:36:21,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 270 transitions, 2253 flow [2023-01-27 20:36:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 20:36:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 20:36:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4667 transitions. [2023-01-27 20:36:21,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3352729885057471 [2023-01-27 20:36:21,476 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4667 transitions. [2023-01-27 20:36:21,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4667 transitions. [2023-01-27 20:36:21,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:21,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4667 transitions. [2023-01-27 20:36:21,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 145.84375) internal successors, (4667), 32 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:21,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 435.0) internal successors, (14355), 33 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:21,496 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 435.0) internal successors, (14355), 33 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:21,496 INFO L175 Difference]: Start difference. First operand has 123 places, 110 transitions, 1060 flow. Second operand 32 states and 4667 transitions. [2023-01-27 20:36:21,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 270 transitions, 2253 flow [2023-01-27 20:36:21,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 270 transitions, 2079 flow, removed 58 selfloop flow, removed 11 redundant places. [2023-01-27 20:36:21,515 INFO L231 Difference]: Finished difference. Result has 147 places, 118 transitions, 1214 flow [2023-01-27 20:36:21,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1214, PETRI_PLACES=147, PETRI_TRANSITIONS=118} [2023-01-27 20:36:21,516 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 122 predicate places. [2023-01-27 20:36:21,516 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 118 transitions, 1214 flow [2023-01-27 20:36:21,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 140.84615384615384) internal successors, (3662), 26 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:21,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:21,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:21,537 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 20:36:21,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:21,723 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 20:36:21,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:21,723 INFO L85 PathProgramCache]: Analyzing trace with hash 87662851, now seen corresponding path program 6 times [2023-01-27 20:36:21,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:21,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017943024] [2023-01-27 20:36:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:21,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:21,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:21,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017943024] [2023-01-27 20:36:21,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017943024] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:21,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721209071] [2023-01-27 20:36:21,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:36:21,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:21,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:21,925 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:36:21,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 20:36:22,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-01-27 20:36:22,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 20:36:22,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:22,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:22,216 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 108 treesize of output 73 [2023-01-27 20:36:22,255 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 20:36:22,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:36:22,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721209071] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:22,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:36:22,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-01-27 20:36:22,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500908498] [2023-01-27 20:36:22,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:22,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:36:22,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:22,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:36:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-01-27 20:36:22,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:22,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 118 transitions, 1214 flow. Second operand has 9 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:22,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:22,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:22,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:22,501 INFO L130 PetriNetUnfolder]: 590/1109 cut-off events. [2023-01-27 20:36:22,502 INFO L131 PetriNetUnfolder]: For 3839/3839 co-relation queries the response was YES. [2023-01-27 20:36:22,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4705 conditions, 1109 events. 590/1109 cut-off events. For 3839/3839 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5774 event pairs, 140 based on Foata normal form. 1/1024 useless extension candidates. Maximal degree in co-relation 4645. Up to 512 conditions per place. [2023-01-27 20:36:22,512 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 90 selfloop transitions, 58 changer transitions 6/154 dead transitions. [2023-01-27 20:36:22,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 154 transitions, 1623 flow [2023-01-27 20:36:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:36:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:36:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1327 transitions. [2023-01-27 20:36:22,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3389527458492976 [2023-01-27 20:36:22,514 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1327 transitions. [2023-01-27 20:36:22,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1327 transitions. [2023-01-27 20:36:22,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:22,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1327 transitions. [2023-01-27 20:36:22,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 147.44444444444446) internal successors, (1327), 9 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:22,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:22,518 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:22,518 INFO L175 Difference]: Start difference. First operand has 147 places, 118 transitions, 1214 flow. Second operand 9 states and 1327 transitions. [2023-01-27 20:36:22,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 154 transitions, 1623 flow [2023-01-27 20:36:22,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 154 transitions, 1508 flow, removed 11 selfloop flow, removed 22 redundant places. [2023-01-27 20:36:22,535 INFO L231 Difference]: Finished difference. Result has 132 places, 116 transitions, 1196 flow [2023-01-27 20:36:22,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1196, PETRI_PLACES=132, PETRI_TRANSITIONS=116} [2023-01-27 20:36:22,535 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 107 predicate places. [2023-01-27 20:36:22,535 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 116 transitions, 1196 flow [2023-01-27 20:36:22,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:22,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:22,536 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 20:36:22,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 20:36:22,741 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,SelfDestructingSolverStorable16 [2023-01-27 20:36:22,741 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 20:36:22,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:22,742 INFO L85 PathProgramCache]: Analyzing trace with hash -74845507, now seen corresponding path program 1 times [2023-01-27 20:36:22,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:22,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105223248] [2023-01-27 20:36:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:22,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:22,834 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 20:36:22,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:22,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105223248] [2023-01-27 20:36:22,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105223248] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725993319] [2023-01-27 20:36:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:22,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:22,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:22,836 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:36:22,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 20:36:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:22,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 20:36:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:23,067 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 20:36:23,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:23,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725993319] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:23,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:23,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-01-27 20:36:23,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178447185] [2023-01-27 20:36:23,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:23,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 20:36:23,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:23,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 20:36:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-01-27 20:36:23,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 435 [2023-01-27 20:36:23,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 116 transitions, 1196 flow. Second operand has 7 states, 7 states have (on average 158.42857142857142) internal successors, (1109), 7 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:23,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:23,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 435 [2023-01-27 20:36:23,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:23,410 INFO L130 PetriNetUnfolder]: 627/1189 cut-off events. [2023-01-27 20:36:23,411 INFO L131 PetriNetUnfolder]: For 5251/5251 co-relation queries the response was YES. [2023-01-27 20:36:23,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5166 conditions, 1189 events. 627/1189 cut-off events. For 5251/5251 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6405 event pairs, 106 based on Foata normal form. 16/1119 useless extension candidates. Maximal degree in co-relation 5109. Up to 357 conditions per place. [2023-01-27 20:36:23,425 INFO L137 encePairwiseOnDemand]: 426/435 looper letters, 156 selfloop transitions, 19 changer transitions 0/175 dead transitions. [2023-01-27 20:36:23,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 175 transitions, 1918 flow [2023-01-27 20:36:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:36:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:36:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1643 transitions. [2023-01-27 20:36:23,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3777011494252874 [2023-01-27 20:36:23,427 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1643 transitions. [2023-01-27 20:36:23,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1643 transitions. [2023-01-27 20:36:23,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:23,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1643 transitions. [2023-01-27 20:36:23,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 164.3) internal successors, (1643), 10 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:23,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:23,431 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:23,431 INFO L175 Difference]: Start difference. First operand has 132 places, 116 transitions, 1196 flow. Second operand 10 states and 1643 transitions. [2023-01-27 20:36:23,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 175 transitions, 1918 flow [2023-01-27 20:36:23,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 175 transitions, 1752 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-01-27 20:36:23,445 INFO L231 Difference]: Finished difference. Result has 130 places, 121 transitions, 1127 flow [2023-01-27 20:36:23,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1127, PETRI_PLACES=130, PETRI_TRANSITIONS=121} [2023-01-27 20:36:23,445 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 105 predicate places. [2023-01-27 20:36:23,445 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 121 transitions, 1127 flow [2023-01-27 20:36:23,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.42857142857142) internal successors, (1109), 7 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:23,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:23,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:23,451 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 20:36:23,648 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,SelfDestructingSolverStorable17 [2023-01-27 20:36:23,649 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 20:36:23,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:23,649 INFO L85 PathProgramCache]: Analyzing trace with hash -116190729, now seen corresponding path program 1 times [2023-01-27 20:36:23,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:23,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699340906] [2023-01-27 20:36:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:23,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:23,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:23,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699340906] [2023-01-27 20:36:23,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699340906] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:23,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:23,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 20:36:23,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428840492] [2023-01-27 20:36:23,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:23,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:36:23,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:23,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:36:23,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:36:23,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 435 [2023-01-27 20:36:23,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 121 transitions, 1127 flow. Second operand has 5 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:23,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:23,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 435 [2023-01-27 20:36:23,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:23,900 INFO L130 PetriNetUnfolder]: 402/790 cut-off events. [2023-01-27 20:36:23,900 INFO L131 PetriNetUnfolder]: For 3590/3590 co-relation queries the response was YES. [2023-01-27 20:36:23,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3628 conditions, 790 events. 402/790 cut-off events. For 3590/3590 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3725 event pairs, 237 based on Foata normal form. 42/832 useless extension candidates. Maximal degree in co-relation 3399. Up to 687 conditions per place. [2023-01-27 20:36:23,904 INFO L137 encePairwiseOnDemand]: 430/435 looper letters, 74 selfloop transitions, 2 changer transitions 33/109 dead transitions. [2023-01-27 20:36:23,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 109 transitions, 1176 flow [2023-01-27 20:36:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:36:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:36:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 835 transitions. [2023-01-27 20:36:23,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3839080459770115 [2023-01-27 20:36:23,906 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 835 transitions. [2023-01-27 20:36:23,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 835 transitions. [2023-01-27 20:36:23,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:23,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 835 transitions. [2023-01-27 20:36:23,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:23,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 435.0) internal successors, (2610), 6 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:23,909 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 435.0) internal successors, (2610), 6 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:23,909 INFO L175 Difference]: Start difference. First operand has 130 places, 121 transitions, 1127 flow. Second operand 5 states and 835 transitions. [2023-01-27 20:36:23,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 109 transitions, 1176 flow [2023-01-27 20:36:23,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 109 transitions, 1097 flow, removed 10 selfloop flow, removed 12 redundant places. [2023-01-27 20:36:23,919 INFO L231 Difference]: Finished difference. Result has 117 places, 76 transitions, 649 flow [2023-01-27 20:36:23,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=649, PETRI_PLACES=117, PETRI_TRANSITIONS=76} [2023-01-27 20:36:23,920 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 92 predicate places. [2023-01-27 20:36:23,920 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 76 transitions, 649 flow [2023-01-27 20:36:23,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:23,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:23,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:23,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-01-27 20:36:23,921 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 20:36:23,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1934131672, now seen corresponding path program 1 times [2023-01-27 20:36:23,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:23,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565317815] [2023-01-27 20:36:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:23,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:24,041 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 20:36:24,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:24,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565317815] [2023-01-27 20:36:24,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565317815] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:36:24,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:36:24,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 20:36:24,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211573029] [2023-01-27 20:36:24,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:24,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 20:36:24,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:24,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 20:36:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 20:36:24,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 435 [2023-01-27 20:36:24,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 76 transitions, 649 flow. Second operand has 5 states, 5 states have (on average 162.8) internal successors, (814), 5 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:24,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:24,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 435 [2023-01-27 20:36:24,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:24,151 INFO L130 PetriNetUnfolder]: 226/442 cut-off events. [2023-01-27 20:36:24,152 INFO L131 PetriNetUnfolder]: For 1807/1807 co-relation queries the response was YES. [2023-01-27 20:36:24,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2014 conditions, 442 events. 226/442 cut-off events. For 1807/1807 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1699 event pairs, 126 based on Foata normal form. 28/470 useless extension candidates. Maximal degree in co-relation 1978. Up to 375 conditions per place. [2023-01-27 20:36:24,153 INFO L137 encePairwiseOnDemand]: 430/435 looper letters, 38 selfloop transitions, 4 changer transitions 25/67 dead transitions. [2023-01-27 20:36:24,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 67 transitions, 627 flow [2023-01-27 20:36:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 20:36:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 20:36:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 833 transitions. [2023-01-27 20:36:24,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38298850574712645 [2023-01-27 20:36:24,154 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 833 transitions. [2023-01-27 20:36:24,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 833 transitions. [2023-01-27 20:36:24,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:24,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 833 transitions. [2023-01-27 20:36:24,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.6) internal successors, (833), 5 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:24,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 435.0) internal successors, (2610), 6 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:24,157 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 435.0) internal successors, (2610), 6 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:24,157 INFO L175 Difference]: Start difference. First operand has 117 places, 76 transitions, 649 flow. Second operand 5 states and 833 transitions. [2023-01-27 20:36:24,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 67 transitions, 627 flow [2023-01-27 20:36:24,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 67 transitions, 574 flow, removed 9 selfloop flow, removed 15 redundant places. [2023-01-27 20:36:24,160 INFO L231 Difference]: Finished difference. Result has 79 places, 42 transitions, 243 flow [2023-01-27 20:36:24,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=79, PETRI_TRANSITIONS=42} [2023-01-27 20:36:24,161 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 54 predicate places. [2023-01-27 20:36:24,161 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 42 transitions, 243 flow [2023-01-27 20:36:24,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 162.8) internal successors, (814), 5 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:24,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:24,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:24,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-01-27 20:36:24,162 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 20:36:24,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash 331731570, now seen corresponding path program 1 times [2023-01-27 20:36:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036303184] [2023-01-27 20:36:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:24,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:24,503 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 20:36:24,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:24,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036303184] [2023-01-27 20:36:24,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036303184] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:24,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621597069] [2023-01-27 20:36:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:24,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:24,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:24,505 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 20:36:24,571 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 20:36:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:24,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:36:24,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:24,737 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-01-27 20:36:24,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 16 [2023-01-27 20:36:24,831 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-27 20:36:24,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 20:36:24,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:36:24,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:36:24,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:36:24,983 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 20:36:24,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:25,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621597069] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:25,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:25,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 25 [2023-01-27 20:36:25,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704024210] [2023-01-27 20:36:25,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:25,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:36:25,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:25,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:36:25,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=500, Unknown=7, NotChecked=0, Total=650 [2023-01-27 20:36:25,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 435 [2023-01-27 20:36:25,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 42 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 127.58333333333333) internal successors, (1531), 12 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:25,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:25,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 435 [2023-01-27 20:36:25,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:25,720 INFO L130 PetriNetUnfolder]: 514/926 cut-off events. [2023-01-27 20:36:25,720 INFO L131 PetriNetUnfolder]: For 1595/1595 co-relation queries the response was YES. [2023-01-27 20:36:25,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3525 conditions, 926 events. 514/926 cut-off events. For 1595/1595 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4338 event pairs, 100 based on Foata normal form. 32/957 useless extension candidates. Maximal degree in co-relation 3441. Up to 348 conditions per place. [2023-01-27 20:36:25,724 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 85 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2023-01-27 20:36:25,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 794 flow [2023-01-27 20:36:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:36:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:36:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1333 transitions. [2023-01-27 20:36:25,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3064367816091954 [2023-01-27 20:36:25,729 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1333 transitions. [2023-01-27 20:36:25,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1333 transitions. [2023-01-27 20:36:25,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:25,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1333 transitions. [2023-01-27 20:36:25,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 133.3) internal successors, (1333), 10 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:25,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:25,733 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:25,733 INFO L175 Difference]: Start difference. First operand has 79 places, 42 transitions, 243 flow. Second operand 10 states and 1333 transitions. [2023-01-27 20:36:25,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 794 flow [2023-01-27 20:36:25,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 102 transitions, 740 flow, removed 23 selfloop flow, removed 9 redundant places. [2023-01-27 20:36:25,737 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 312 flow [2023-01-27 20:36:25,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=312, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-01-27 20:36:25,738 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2023-01-27 20:36:25,738 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 312 flow [2023-01-27 20:36:25,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 127.58333333333333) internal successors, (1531), 12 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:25,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:25,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:25,743 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 20:36:25,943 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,SelfDestructingSolverStorable20 [2023-01-27 20:36:25,943 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 20:36:25,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1880584320, now seen corresponding path program 2 times [2023-01-27 20:36:25,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:25,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57163755] [2023-01-27 20:36:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:25,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:26,233 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 20:36:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57163755] [2023-01-27 20:36:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57163755] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:26,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775115195] [2023-01-27 20:36:26,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:36:26,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:26,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:26,235 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 20:36:26,237 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 20:36:26,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:36:26,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 20:36:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:26,484 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 20:36:26,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:26,578 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:26,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:36:26,583 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:26,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:36:26,618 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:36:26,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 20:36:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:26,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775115195] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:36:26,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:36:26,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-01-27 20:36:26,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847493169] [2023-01-27 20:36:26,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:36:26,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 20:36:26,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:26,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 20:36:26,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:36:26,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 435 [2023-01-27 20:36:26,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 312 flow. Second operand has 22 states, 22 states have (on average 132.77272727272728) internal successors, (2921), 22 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:26,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:26,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 435 [2023-01-27 20:36:26,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:27,217 INFO L130 PetriNetUnfolder]: 894/1642 cut-off events. [2023-01-27 20:36:27,217 INFO L131 PetriNetUnfolder]: For 3114/3114 co-relation queries the response was YES. [2023-01-27 20:36:27,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 1642 events. 894/1642 cut-off events. For 3114/3114 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9073 event pairs, 254 based on Foata normal form. 64/1705 useless extension candidates. Maximal degree in co-relation 3138. Up to 757 conditions per place. [2023-01-27 20:36:27,223 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 84 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2023-01-27 20:36:27,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 894 flow [2023-01-27 20:36:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:36:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:36:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1511 transitions. [2023-01-27 20:36:27,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31577847439916407 [2023-01-27 20:36:27,225 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1511 transitions. [2023-01-27 20:36:27,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1511 transitions. [2023-01-27 20:36:27,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:27,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1511 transitions. [2023-01-27 20:36:27,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 137.36363636363637) internal successors, (1511), 11 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:27,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:27,228 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:27,229 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 312 flow. Second operand 11 states and 1511 transitions. [2023-01-27 20:36:27,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 894 flow [2023-01-27 20:36:27,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 876 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-01-27 20:36:27,232 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 488 flow [2023-01-27 20:36:27,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=488, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2023-01-27 20:36:27,233 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 46 predicate places. [2023-01-27 20:36:27,233 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 488 flow [2023-01-27 20:36:27,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 132.77272727272728) internal successors, (2921), 22 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:27,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:27,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:27,247 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 20:36:27,438 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,SelfDestructingSolverStorable21 [2023-01-27 20:36:27,439 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 20:36:27,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:27,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1839051542, now seen corresponding path program 3 times [2023-01-27 20:36:27,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:27,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379264533] [2023-01-27 20:36:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:27,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:27,733 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 20:36:27,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:27,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379264533] [2023-01-27 20:36:27,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379264533] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:27,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33116211] [2023-01-27 20:36:27,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:36:27,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:27,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:27,750 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 20:36:27,751 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 20:36:27,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:36:27,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:27,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 20:36:27,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:27,943 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 20:36:27,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:28,058 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:28,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:36:28,099 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:36:28,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-01-27 20:36:28,112 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:28,112 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 12 treesize of output 4 [2023-01-27 20:36:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:28,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33116211] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:28,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:28,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2023-01-27 20:36:28,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785227246] [2023-01-27 20:36:28,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:28,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 20:36:28,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 20:36:28,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:36:28,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 435 [2023-01-27 20:36:28,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 488 flow. Second operand has 10 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:28,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:28,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 435 [2023-01-27 20:36:28,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:28,635 INFO L130 PetriNetUnfolder]: 1060/1974 cut-off events. [2023-01-27 20:36:28,635 INFO L131 PetriNetUnfolder]: For 5813/5813 co-relation queries the response was YES. [2023-01-27 20:36:28,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8545 conditions, 1974 events. 1060/1974 cut-off events. For 5813/5813 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11384 event pairs, 336 based on Foata normal form. 64/2038 useless extension candidates. Maximal degree in co-relation 8505. Up to 1040 conditions per place. [2023-01-27 20:36:28,662 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 79 selfloop transitions, 31 changer transitions 0/110 dead transitions. [2023-01-27 20:36:28,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 1024 flow [2023-01-27 20:36:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:36:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:36:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1416 transitions. [2023-01-27 20:36:28,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255172413793103 [2023-01-27 20:36:28,664 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1416 transitions. [2023-01-27 20:36:28,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1416 transitions. [2023-01-27 20:36:28,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:28,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1416 transitions. [2023-01-27 20:36:28,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.6) internal successors, (1416), 10 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:28,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:28,668 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:28,668 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 488 flow. Second operand 10 states and 1416 transitions. [2023-01-27 20:36:28,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 1024 flow [2023-01-27 20:36:28,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 110 transitions, 1002 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-01-27 20:36:28,675 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 632 flow [2023-01-27 20:36:28,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=632, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2023-01-27 20:36:28,675 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 54 predicate places. [2023-01-27 20:36:28,675 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 632 flow [2023-01-27 20:36:28,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:28,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:28,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:28,690 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 20:36:28,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-27 20:36:28,881 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 20:36:28,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:28,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2036209612, now seen corresponding path program 4 times [2023-01-27 20:36:28,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:28,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804749480] [2023-01-27 20:36:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:28,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:29,178 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 20:36:29,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804749480] [2023-01-27 20:36:29,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804749480] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747263706] [2023-01-27 20:36:29,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:36:29,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:29,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:29,181 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 20:36:29,182 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 20:36:29,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:36:29,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:29,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:36:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:29,313 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 20:36:29,336 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 20:36:29,353 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 20:36:29,437 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 20:36:29,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:36:29,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747263706] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:29,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:29,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 22 [2023-01-27 20:36:29,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739232589] [2023-01-27 20:36:29,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:29,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:36:29,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:29,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:36:29,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:36:29,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 435 [2023-01-27 20:36:29,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 632 flow. Second operand has 6 states, 6 states have (on average 158.16666666666666) internal successors, (949), 6 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:29,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:29,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 435 [2023-01-27 20:36:29,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:29,949 INFO L130 PetriNetUnfolder]: 1152/2126 cut-off events. [2023-01-27 20:36:29,949 INFO L131 PetriNetUnfolder]: For 7537/7537 co-relation queries the response was YES. [2023-01-27 20:36:29,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10046 conditions, 2126 events. 1152/2126 cut-off events. For 7537/7537 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12387 event pairs, 370 based on Foata normal form. 4/2130 useless extension candidates. Maximal degree in co-relation 10002. Up to 1587 conditions per place. [2023-01-27 20:36:29,960 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 103 selfloop transitions, 24 changer transitions 0/127 dead transitions. [2023-01-27 20:36:29,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 1292 flow [2023-01-27 20:36:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 20:36:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 20:36:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1310 transitions. [2023-01-27 20:36:29,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3764367816091954 [2023-01-27 20:36:29,962 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1310 transitions. [2023-01-27 20:36:29,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1310 transitions. [2023-01-27 20:36:29,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:29,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1310 transitions. [2023-01-27 20:36:29,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 163.75) internal successors, (1310), 8 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:29,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:29,965 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:29,965 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 632 flow. Second operand 8 states and 1310 transitions. [2023-01-27 20:36:29,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 1292 flow [2023-01-27 20:36:29,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1241 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-01-27 20:36:29,978 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 775 flow [2023-01-27 20:36:29,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=775, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-01-27 20:36:29,979 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 59 predicate places. [2023-01-27 20:36:29,979 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 775 flow [2023-01-27 20:36:29,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.16666666666666) internal successors, (949), 6 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:29,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:29,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:29,997 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 20:36:30,184 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,SelfDestructingSolverStorable23 [2023-01-27 20:36:30,185 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 20:36:30,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 705047868, now seen corresponding path program 5 times [2023-01-27 20:36:30,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:30,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519048787] [2023-01-27 20:36:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:30,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:30,474 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 20:36:30,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519048787] [2023-01-27 20:36:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519048787] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507410861] [2023-01-27 20:36:30,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:36:30,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:30,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:30,476 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 20:36:30,478 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 20:36:30,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:36:30,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:30,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:36:30,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:30,607 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 20:36:30,633 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 20:36:30,655 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 20:36:30,794 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 20:36:30,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:36:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507410861] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:30,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:30,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 24 [2023-01-27 20:36:30,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964327097] [2023-01-27 20:36:30,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:30,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:36:30,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:30,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:36:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:36:30,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 435 [2023-01-27 20:36:30,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 775 flow. Second operand has 6 states, 6 states have (on average 158.16666666666666) internal successors, (949), 6 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:30,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:30,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 435 [2023-01-27 20:36:30,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:31,356 INFO L130 PetriNetUnfolder]: 1172/2180 cut-off events. [2023-01-27 20:36:31,356 INFO L131 PetriNetUnfolder]: For 8870/8870 co-relation queries the response was YES. [2023-01-27 20:36:31,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10568 conditions, 2180 events. 1172/2180 cut-off events. For 8870/8870 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13064 event pairs, 344 based on Foata normal form. 4/2184 useless extension candidates. Maximal degree in co-relation 9532. Up to 1445 conditions per place. [2023-01-27 20:36:31,373 INFO L137 encePairwiseOnDemand]: 426/435 looper letters, 114 selfloop transitions, 26 changer transitions 0/140 dead transitions. [2023-01-27 20:36:31,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 140 transitions, 1454 flow [2023-01-27 20:36:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:36:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:36:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1156 transitions. [2023-01-27 20:36:31,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37963875205254516 [2023-01-27 20:36:31,385 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1156 transitions. [2023-01-27 20:36:31,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1156 transitions. [2023-01-27 20:36:31,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:31,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1156 transitions. [2023-01-27 20:36:31,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 165.14285714285714) internal successors, (1156), 7 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:31,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:31,388 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:31,388 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 775 flow. Second operand 7 states and 1156 transitions. [2023-01-27 20:36:31,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 140 transitions, 1454 flow [2023-01-27 20:36:31,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 140 transitions, 1401 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-01-27 20:36:31,405 INFO L231 Difference]: Finished difference. Result has 93 places, 95 transitions, 977 flow [2023-01-27 20:36:31,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=977, PETRI_PLACES=93, PETRI_TRANSITIONS=95} [2023-01-27 20:36:31,405 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 68 predicate places. [2023-01-27 20:36:31,405 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 95 transitions, 977 flow [2023-01-27 20:36:31,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.16666666666666) internal successors, (949), 6 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:31,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:31,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:31,412 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 20:36:31,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:31,610 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 20:36:31,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:31,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1236215570, now seen corresponding path program 6 times [2023-01-27 20:36:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:31,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657268406] [2023-01-27 20:36:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:31,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:31,892 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 20:36:31,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:31,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657268406] [2023-01-27 20:36:31,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657268406] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:31,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950085743] [2023-01-27 20:36:31,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:36:31,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:31,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:31,894 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 20:36:31,896 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 20:36:32,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 20:36:32,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:32,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 20:36:32,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:32,133 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 20:36:32,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:32,195 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:32,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:36:32,201 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:32,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:36:32,234 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:36:32,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 20:36:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:32,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950085743] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:32,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:32,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-01-27 20:36:32,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077683721] [2023-01-27 20:36:32,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:32,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 20:36:32,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:32,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 20:36:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:36:32,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 435 [2023-01-27 20:36:32,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 95 transitions, 977 flow. Second operand has 10 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:32,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:32,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 435 [2023-01-27 20:36:32,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:32,734 INFO L130 PetriNetUnfolder]: 1154/2110 cut-off events. [2023-01-27 20:36:32,734 INFO L131 PetriNetUnfolder]: For 11019/11019 co-relation queries the response was YES. [2023-01-27 20:36:32,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10756 conditions, 2110 events. 1154/2110 cut-off events. For 11019/11019 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12247 event pairs, 376 based on Foata normal form. 8/2118 useless extension candidates. Maximal degree in co-relation 10562. Up to 1372 conditions per place. [2023-01-27 20:36:32,743 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 90 selfloop transitions, 39 changer transitions 0/129 dead transitions. [2023-01-27 20:36:32,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 129 transitions, 1541 flow [2023-01-27 20:36:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:36:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:36:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1410 transitions. [2023-01-27 20:36:32,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32413793103448274 [2023-01-27 20:36:32,745 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1410 transitions. [2023-01-27 20:36:32,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1410 transitions. [2023-01-27 20:36:32,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:32,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1410 transitions. [2023-01-27 20:36:32,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.0) internal successors, (1410), 10 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:32,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:32,749 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:32,749 INFO L175 Difference]: Start difference. First operand has 93 places, 95 transitions, 977 flow. Second operand 10 states and 1410 transitions. [2023-01-27 20:36:32,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 129 transitions, 1541 flow [2023-01-27 20:36:32,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 129 transitions, 1503 flow, removed 19 selfloop flow, removed 0 redundant places. [2023-01-27 20:36:32,769 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 1134 flow [2023-01-27 20:36:32,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1134, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2023-01-27 20:36:32,770 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 78 predicate places. [2023-01-27 20:36:32,770 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 1134 flow [2023-01-27 20:36:32,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:32,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:32,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:32,775 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 20:36:32,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 20:36:32,975 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 20:36:32,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2051793062, now seen corresponding path program 7 times [2023-01-27 20:36:32,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:32,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075681752] [2023-01-27 20:36:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:32,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:33,281 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 20:36:33,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:33,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075681752] [2023-01-27 20:36:33,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075681752] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:33,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681680501] [2023-01-27 20:36:33,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:36:33,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:33,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:33,282 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 20:36:33,302 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 20:36:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:33,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-27 20:36:33,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:33,436 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-01-27 20:36:33,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 16 [2023-01-27 20:36:33,499 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-27 20:36:33,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 20:36:33,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 20:36:33,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:36:33,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:36:33,637 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 20:36:33,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:33,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:33,996 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 48 treesize of output 37 [2023-01-27 20:36:34,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:34,019 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 294 treesize of output 274 [2023-01-27 20:36:34,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:34,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 239 [2023-01-27 20:36:34,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:34,039 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 230 treesize of output 223 [2023-01-27 20:36:34,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:34,247 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 48 treesize of output 37 [2023-01-27 20:36:34,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:34,254 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 598 treesize of output 546 [2023-01-27 20:36:34,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:34,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 255 [2023-01-27 20:36:34,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:34,278 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 246 treesize of output 223 [2023-01-27 20:36:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:34,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681680501] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:36:34,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:36:34,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2023-01-27 20:36:34,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141071766] [2023-01-27 20:36:34,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:36:34,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:36:34,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:34,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:36:34,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=503, Unknown=10, NotChecked=0, Total=650 [2023-01-27 20:36:34,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 435 [2023-01-27 20:36:34,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 1134 flow. Second operand has 26 states, 26 states have (on average 122.53846153846153) internal successors, (3186), 26 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:34,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:34,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 435 [2023-01-27 20:36:34,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:35,555 INFO L130 PetriNetUnfolder]: 1410/2618 cut-off events. [2023-01-27 20:36:35,555 INFO L131 PetriNetUnfolder]: For 15946/15946 co-relation queries the response was YES. [2023-01-27 20:36:35,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13560 conditions, 2618 events. 1410/2618 cut-off events. For 15946/15946 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16306 event pairs, 328 based on Foata normal form. 44/2662 useless extension candidates. Maximal degree in co-relation 13340. Up to 1431 conditions per place. [2023-01-27 20:36:35,569 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 122 selfloop transitions, 37 changer transitions 0/159 dead transitions. [2023-01-27 20:36:35,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 159 transitions, 1991 flow [2023-01-27 20:36:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:36:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:36:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1398 transitions. [2023-01-27 20:36:35,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2921630094043887 [2023-01-27 20:36:35,584 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1398 transitions. [2023-01-27 20:36:35,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1398 transitions. [2023-01-27 20:36:35,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:35,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1398 transitions. [2023-01-27 20:36:35,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 127.0909090909091) internal successors, (1398), 11 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:35,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:35,603 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:35,603 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 1134 flow. Second operand 11 states and 1398 transitions. [2023-01-27 20:36:35,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 159 transitions, 1991 flow [2023-01-27 20:36:35,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 159 transitions, 1891 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-01-27 20:36:35,668 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 1276 flow [2023-01-27 20:36:35,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1276, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2023-01-27 20:36:35,669 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 84 predicate places. [2023-01-27 20:36:35,669 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 1276 flow [2023-01-27 20:36:35,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 122.53846153846153) internal successors, (3186), 26 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:35,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:35,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:35,684 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 20:36:35,874 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,SelfDestructingSolverStorable26 [2023-01-27 20:36:35,874 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 20:36:35,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:35,875 INFO L85 PathProgramCache]: Analyzing trace with hash 428376716, now seen corresponding path program 8 times [2023-01-27 20:36:35,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:35,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101534565] [2023-01-27 20:36:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:35,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:36,205 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 20:36:36,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:36,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101534565] [2023-01-27 20:36:36,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101534565] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:36,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039447860] [2023-01-27 20:36:36,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:36:36,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:36,237 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 20:36:36,239 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 20:36:36,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:36:36,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:36,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 20:36:36,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:36,481 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 20:36:36,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:36,596 INFO L321 Elim1Store]: treesize reduction 11, result has 84.1 percent of original size [2023-01-27 20:36:36,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 72 [2023-01-27 20:36:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:36,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039447860] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:36,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:36,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-01-27 20:36:36,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782906573] [2023-01-27 20:36:36,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:36,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 20:36:36,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:36,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 20:36:36,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:36:36,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 435 [2023-01-27 20:36:36,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 1276 flow. Second operand has 10 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:36,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:36,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 435 [2023-01-27 20:36:36,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:37,125 INFO L130 PetriNetUnfolder]: 1416/2652 cut-off events. [2023-01-27 20:36:37,125 INFO L131 PetriNetUnfolder]: For 18594/18594 co-relation queries the response was YES. [2023-01-27 20:36:37,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14779 conditions, 2652 events. 1416/2652 cut-off events. For 18594/18594 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16581 event pairs, 324 based on Foata normal form. 4/2656 useless extension candidates. Maximal degree in co-relation 14719. Up to 1436 conditions per place. [2023-01-27 20:36:37,137 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 112 selfloop transitions, 44 changer transitions 0/156 dead transitions. [2023-01-27 20:36:37,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 156 transitions, 1982 flow [2023-01-27 20:36:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:36:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:36:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1410 transitions. [2023-01-27 20:36:37,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32413793103448274 [2023-01-27 20:36:37,139 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1410 transitions. [2023-01-27 20:36:37,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1410 transitions. [2023-01-27 20:36:37,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:37,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1410 transitions. [2023-01-27 20:36:37,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.0) internal successors, (1410), 10 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:37,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:37,151 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:37,151 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 1276 flow. Second operand 10 states and 1410 transitions. [2023-01-27 20:36:37,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 156 transitions, 1982 flow [2023-01-27 20:36:37,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 156 transitions, 1943 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-01-27 20:36:37,185 INFO L231 Difference]: Finished difference. Result has 116 places, 114 transitions, 1477 flow [2023-01-27 20:36:37,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1477, PETRI_PLACES=116, PETRI_TRANSITIONS=114} [2023-01-27 20:36:37,189 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 91 predicate places. [2023-01-27 20:36:37,190 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 114 transitions, 1477 flow [2023-01-27 20:36:37,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:37,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:37,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:37,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 20:36:37,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 20:36:37,395 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 20:36:37,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:37,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2137221722, now seen corresponding path program 9 times [2023-01-27 20:36:37,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:37,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604204314] [2023-01-27 20:36:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:37,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:37,677 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 20:36:37,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:37,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604204314] [2023-01-27 20:36:37,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604204314] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:37,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157602518] [2023-01-27 20:36:37,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:36:37,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:37,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:37,687 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 20:36:37,688 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 20:36:37,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:36:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 20:36:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:38,008 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 20:36:38,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:38,080 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:38,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:36:38,085 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:38,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:36:38,114 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:36:38,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 20:36:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:38,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157602518] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:38,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:38,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-01-27 20:36:38,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896344102] [2023-01-27 20:36:38,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:38,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 20:36:38,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:38,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 20:36:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:36:38,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 435 [2023-01-27 20:36:38,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 114 transitions, 1477 flow. Second operand has 10 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:38,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:38,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 435 [2023-01-27 20:36:38,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:38,632 INFO L130 PetriNetUnfolder]: 1418/2658 cut-off events. [2023-01-27 20:36:38,632 INFO L131 PetriNetUnfolder]: For 22024/22024 co-relation queries the response was YES. [2023-01-27 20:36:38,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15998 conditions, 2658 events. 1418/2658 cut-off events. For 22024/22024 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16817 event pairs, 332 based on Foata normal form. 4/2662 useless extension candidates. Maximal degree in co-relation 15827. Up to 1436 conditions per place. [2023-01-27 20:36:38,647 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 108 selfloop transitions, 39 changer transitions 0/147 dead transitions. [2023-01-27 20:36:38,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 147 transitions, 2070 flow [2023-01-27 20:36:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:36:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:36:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1407 transitions. [2023-01-27 20:36:38,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.323448275862069 [2023-01-27 20:36:38,673 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1407 transitions. [2023-01-27 20:36:38,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1407 transitions. [2023-01-27 20:36:38,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:38,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1407 transitions. [2023-01-27 20:36:38,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 140.7) internal successors, (1407), 10 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:38,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:38,677 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:38,677 INFO L175 Difference]: Start difference. First operand has 116 places, 114 transitions, 1477 flow. Second operand 10 states and 1407 transitions. [2023-01-27 20:36:38,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 147 transitions, 2070 flow [2023-01-27 20:36:38,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 147 transitions, 2007 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-01-27 20:36:38,723 INFO L231 Difference]: Finished difference. Result has 121 places, 117 transitions, 1576 flow [2023-01-27 20:36:38,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1576, PETRI_PLACES=121, PETRI_TRANSITIONS=117} [2023-01-27 20:36:38,725 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 96 predicate places. [2023-01-27 20:36:38,725 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 117 transitions, 1576 flow [2023-01-27 20:36:38,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:38,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:38,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:38,730 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 20:36:38,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 20:36:38,929 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 20:36:38,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:38,929 INFO L85 PathProgramCache]: Analyzing trace with hash -905893090, now seen corresponding path program 10 times [2023-01-27 20:36:38,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:38,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090247337] [2023-01-27 20:36:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:38,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:39,300 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 20:36:39,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:39,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090247337] [2023-01-27 20:36:39,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090247337] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:39,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028744434] [2023-01-27 20:36:39,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:36:39,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:39,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:39,307 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 20:36:39,310 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 20:36:39,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:36:39,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:39,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:36:39,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:39,466 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 20:36:39,492 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 20:36:39,516 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 20:36:39,763 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 20:36:39,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:36:40,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028744434] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:40,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:40,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 24 [2023-01-27 20:36:40,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450164795] [2023-01-27 20:36:40,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:40,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:36:40,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:40,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:36:40,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:36:40,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 435 [2023-01-27 20:36:40,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 117 transitions, 1576 flow. Second operand has 6 states, 6 states have (on average 158.16666666666666) internal successors, (949), 6 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:40,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:40,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 435 [2023-01-27 20:36:40,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:40,619 INFO L130 PetriNetUnfolder]: 1398/2582 cut-off events. [2023-01-27 20:36:40,619 INFO L131 PetriNetUnfolder]: For 21402/21402 co-relation queries the response was YES. [2023-01-27 20:36:40,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15483 conditions, 2582 events. 1398/2582 cut-off events. For 21402/21402 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15763 event pairs, 292 based on Foata normal form. 4/2586 useless extension candidates. Maximal degree in co-relation 15419. Up to 1189 conditions per place. [2023-01-27 20:36:40,635 INFO L137 encePairwiseOnDemand]: 426/435 looper letters, 128 selfloop transitions, 51 changer transitions 0/179 dead transitions. [2023-01-27 20:36:40,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 179 transitions, 2420 flow [2023-01-27 20:36:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 20:36:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 20:36:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1318 transitions. [2023-01-27 20:36:40,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37873563218390804 [2023-01-27 20:36:40,637 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1318 transitions. [2023-01-27 20:36:40,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1318 transitions. [2023-01-27 20:36:40,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:40,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1318 transitions. [2023-01-27 20:36:40,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.75) internal successors, (1318), 8 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:40,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:40,640 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:40,640 INFO L175 Difference]: Start difference. First operand has 121 places, 117 transitions, 1576 flow. Second operand 8 states and 1318 transitions. [2023-01-27 20:36:40,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 179 transitions, 2420 flow [2023-01-27 20:36:40,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 179 transitions, 2282 flow, removed 20 selfloop flow, removed 8 redundant places. [2023-01-27 20:36:40,690 INFO L231 Difference]: Finished difference. Result has 123 places, 135 transitions, 1860 flow [2023-01-27 20:36:40,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1860, PETRI_PLACES=123, PETRI_TRANSITIONS=135} [2023-01-27 20:36:40,690 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 98 predicate places. [2023-01-27 20:36:40,690 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 135 transitions, 1860 flow [2023-01-27 20:36:40,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.16666666666666) internal successors, (949), 6 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:40,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:40,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:40,699 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 20:36:40,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:40,899 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 20:36:40,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash 593308546, now seen corresponding path program 11 times [2023-01-27 20:36:40,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:40,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358902682] [2023-01-27 20:36:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:40,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:41,561 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 20:36:41,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:41,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358902682] [2023-01-27 20:36:41,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358902682] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:41,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654170232] [2023-01-27 20:36:41,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:36:41,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:41,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:41,577 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 20:36:41,580 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 20:36:41,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:36:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:41,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 20:36:41,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:41,734 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 20:36:41,762 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 20:36:41,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:36:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:36:41,893 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:36:41,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-01-27 20:36:41,984 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 20:36:41,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:42,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:42,339 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 90 treesize of output 54 [2023-01-27 20:36:42,351 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:42,354 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 636 treesize of output 556 [2023-01-27 20:36:42,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:42,424 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 300 treesize of output 284 [2023-01-27 20:36:42,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:42,439 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 230 treesize of output 206 [2023-01-27 20:36:42,817 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 20:36:42,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654170232] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:36:42,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:36:42,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2023-01-27 20:36:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368990581] [2023-01-27 20:36:42,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:36:42,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 20:36:42,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 20:36:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=742, Unknown=8, NotChecked=0, Total=870 [2023-01-27 20:36:42,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 435 [2023-01-27 20:36:42,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 135 transitions, 1860 flow. Second operand has 30 states, 30 states have (on average 120.56666666666666) internal successors, (3617), 30 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:42,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:42,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 435 [2023-01-27 20:36:42,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:44,320 INFO L130 PetriNetUnfolder]: 1992/3622 cut-off events. [2023-01-27 20:36:44,320 INFO L131 PetriNetUnfolder]: For 32334/32334 co-relation queries the response was YES. [2023-01-27 20:36:44,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21242 conditions, 3622 events. 1992/3622 cut-off events. For 32334/32334 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23251 event pairs, 248 based on Foata normal form. 64/3686 useless extension candidates. Maximal degree in co-relation 21067. Up to 1408 conditions per place. [2023-01-27 20:36:44,343 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 160 selfloop transitions, 70 changer transitions 0/230 dead transitions. [2023-01-27 20:36:44,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 230 transitions, 3430 flow [2023-01-27 20:36:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:36:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:36:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1518 transitions. [2023-01-27 20:36:44,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2908045977011494 [2023-01-27 20:36:44,345 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1518 transitions. [2023-01-27 20:36:44,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1518 transitions. [2023-01-27 20:36:44,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:44,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1518 transitions. [2023-01-27 20:36:44,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.5) internal successors, (1518), 12 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:44,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:44,382 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:44,385 INFO L175 Difference]: Start difference. First operand has 123 places, 135 transitions, 1860 flow. Second operand 12 states and 1518 transitions. [2023-01-27 20:36:44,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 230 transitions, 3430 flow [2023-01-27 20:36:44,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 230 transitions, 3364 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-01-27 20:36:44,488 INFO L231 Difference]: Finished difference. Result has 138 places, 153 transitions, 2317 flow [2023-01-27 20:36:44,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2317, PETRI_PLACES=138, PETRI_TRANSITIONS=153} [2023-01-27 20:36:44,488 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 113 predicate places. [2023-01-27 20:36:44,489 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 153 transitions, 2317 flow [2023-01-27 20:36:44,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 120.56666666666666) internal successors, (3617), 30 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:44,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:44,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:44,499 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 20:36:44,694 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,SelfDestructingSolverStorable30 [2023-01-27 20:36:44,695 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 20:36:44,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash -473871770, now seen corresponding path program 12 times [2023-01-27 20:36:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:44,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106580232] [2023-01-27 20:36:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:44,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:45,068 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 20:36:45,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106580232] [2023-01-27 20:36:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106580232] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273316474] [2023-01-27 20:36:45,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:36:45,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:45,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:45,074 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 20:36:45,075 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 20:36:45,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 20:36:45,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:45,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 20:36:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:45,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:36:45,479 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 20:36:45,553 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 20:36:45,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:45,695 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~get2~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) (let ((.cse3 (forall ((~get2~0.base Int) (v_ArrVal_970 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_970) ~get2~0.base) .cse2) |c_thread1Thread1of1ForFork0_#t~mem2|))))) (and (forall ((~get2~0.base Int) (v_ArrVal_970 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_970))) (let ((.cse0 (select .cse1 ~get2~0.base))) (or (= (select .cse0 c_~get2~0.offset) (select (select .cse1 c_~get1~0.base) c_~get1~0.offset)) (not (= (select .cse0 .cse2) |c_thread1Thread1of1ForFork0_#t~mem2|)))))) (or (< 0 c_~n2~0) .cse3) (or (< 0 c_~n1~0) .cse3)))) is different from false [2023-01-27 20:36:45,743 INFO L321 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-01-27 20:36:45,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 127 [2023-01-27 20:36:45,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:45,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-01-27 20:36:45,923 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:45,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2023-01-27 20:36:45,928 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:45,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2023-01-27 20:36:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:46,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273316474] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:46,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:46,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 11] total 28 [2023-01-27 20:36:46,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167550298] [2023-01-27 20:36:46,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:46,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:36:46,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:36:46,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=651, Unknown=1, NotChecked=52, Total=812 [2023-01-27 20:36:46,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 435 [2023-01-27 20:36:46,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 153 transitions, 2317 flow. Second operand has 11 states, 11 states have (on average 128.72727272727272) internal successors, (1416), 11 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:46,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:46,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 435 [2023-01-27 20:36:46,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:49,091 INFO L130 PetriNetUnfolder]: 2038/3638 cut-off events. [2023-01-27 20:36:49,091 INFO L131 PetriNetUnfolder]: For 40681/40681 co-relation queries the response was YES. [2023-01-27 20:36:49,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23712 conditions, 3638 events. 2038/3638 cut-off events. For 40681/40681 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22659 event pairs, 762 based on Foata normal form. 8/3646 useless extension candidates. Maximal degree in co-relation 23457. Up to 2649 conditions per place. [2023-01-27 20:36:49,118 INFO L137 encePairwiseOnDemand]: 420/435 looper letters, 123 selfloop transitions, 89 changer transitions 0/212 dead transitions. [2023-01-27 20:36:49,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 212 transitions, 3657 flow [2023-01-27 20:36:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 20:36:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 20:36:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1585 transitions. [2023-01-27 20:36:49,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.303639846743295 [2023-01-27 20:36:49,121 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1585 transitions. [2023-01-27 20:36:49,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1585 transitions. [2023-01-27 20:36:49,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:49,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1585 transitions. [2023-01-27 20:36:49,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 132.08333333333334) internal successors, (1585), 12 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:49,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:49,139 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 435.0) internal successors, (5655), 13 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:49,139 INFO L175 Difference]: Start difference. First operand has 138 places, 153 transitions, 2317 flow. Second operand 12 states and 1585 transitions. [2023-01-27 20:36:49,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 212 transitions, 3657 flow [2023-01-27 20:36:49,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 212 transitions, 3590 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-01-27 20:36:49,245 INFO L231 Difference]: Finished difference. Result has 146 places, 189 transitions, 3224 flow [2023-01-27 20:36:49,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3224, PETRI_PLACES=146, PETRI_TRANSITIONS=189} [2023-01-27 20:36:49,246 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 121 predicate places. [2023-01-27 20:36:49,246 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 189 transitions, 3224 flow [2023-01-27 20:36:49,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 128.72727272727272) internal successors, (1416), 11 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:49,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:49,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:49,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 20:36:49,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:49,452 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 20:36:49,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1418947498, now seen corresponding path program 13 times [2023-01-27 20:36:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:49,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189606528] [2023-01-27 20:36:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:49,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:49,820 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 20:36:49,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:49,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189606528] [2023-01-27 20:36:49,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189606528] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:49,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350537317] [2023-01-27 20:36:49,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:36:49,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:49,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:49,821 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 20:36:49,823 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 20:36:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:49,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-27 20:36:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:50,035 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 20:36:50,080 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 20:36:50,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:36:50,198 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 20:36:50,294 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 20:36:50,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:50,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:50,638 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 93 treesize of output 57 [2023-01-27 20:36:50,647 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:36:50,647 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 868 treesize of output 756 [2023-01-27 20:36:50,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:50,670 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 368 treesize of output 348 [2023-01-27 20:36:50,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:50,680 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 340 treesize of output 308 [2023-01-27 20:36:50,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:50,836 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 45 treesize of output 34 [2023-01-27 20:36:50,843 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:50,843 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 146 treesize of output 134 [2023-01-27 20:36:50,847 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 122 treesize of output 114 [2023-01-27 20:36:50,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:50,853 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 114 treesize of output 111 [2023-01-27 20:36:50,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:50,942 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 45 treesize of output 34 [2023-01-27 20:36:50,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:50,954 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 146 treesize of output 134 [2023-01-27 20:36:50,959 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 122 treesize of output 114 [2023-01-27 20:36:50,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:50,971 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 114 treesize of output 111 [2023-01-27 20:36:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:51,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350537317] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:36:51,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:36:51,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-01-27 20:36:51,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759161137] [2023-01-27 20:36:51,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:36:51,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:36:51,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:51,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:36:51,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=757, Unknown=25, NotChecked=0, Total=930 [2023-01-27 20:36:51,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 435 [2023-01-27 20:36:51,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 189 transitions, 3224 flow. Second operand has 31 states, 31 states have (on average 124.51612903225806) internal successors, (3860), 31 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:51,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:51,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 435 [2023-01-27 20:36:51,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:53,292 INFO L130 PetriNetUnfolder]: 2260/4040 cut-off events. [2023-01-27 20:36:53,292 INFO L131 PetriNetUnfolder]: For 45528/45528 co-relation queries the response was YES. [2023-01-27 20:36:53,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26915 conditions, 4040 events. 2260/4040 cut-off events. For 45528/45528 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 25587 event pairs, 288 based on Foata normal form. 56/4096 useless extension candidates. Maximal degree in co-relation 26840. Up to 1500 conditions per place. [2023-01-27 20:36:53,318 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 188 selfloop transitions, 105 changer transitions 0/293 dead transitions. [2023-01-27 20:36:53,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 293 transitions, 5000 flow [2023-01-27 20:36:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 20:36:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 20:36:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2070 transitions. [2023-01-27 20:36:53,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974137931034483 [2023-01-27 20:36:53,325 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2070 transitions. [2023-01-27 20:36:53,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2070 transitions. [2023-01-27 20:36:53,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:53,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2070 transitions. [2023-01-27 20:36:53,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 129.375) internal successors, (2070), 16 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:53,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 435.0) internal successors, (7395), 17 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:53,333 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 435.0) internal successors, (7395), 17 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:53,333 INFO L175 Difference]: Start difference. First operand has 146 places, 189 transitions, 3224 flow. Second operand 16 states and 2070 transitions. [2023-01-27 20:36:53,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 293 transitions, 5000 flow [2023-01-27 20:36:53,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 293 transitions, 4816 flow, removed 30 selfloop flow, removed 8 redundant places. [2023-01-27 20:36:53,431 INFO L231 Difference]: Finished difference. Result has 156 places, 215 transitions, 3722 flow [2023-01-27 20:36:53,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3722, PETRI_PLACES=156, PETRI_TRANSITIONS=215} [2023-01-27 20:36:53,432 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 131 predicate places. [2023-01-27 20:36:53,432 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 215 transitions, 3722 flow [2023-01-27 20:36:53,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 124.51612903225806) internal successors, (3860), 31 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:53,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:53,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:53,445 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 20:36:53,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:53,638 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 20:36:53,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1777071356, now seen corresponding path program 14 times [2023-01-27 20:36:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:53,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407705539] [2023-01-27 20:36:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:53,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:54,029 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 20:36:54,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:54,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407705539] [2023-01-27 20:36:54,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407705539] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:54,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815440971] [2023-01-27 20:36:54,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:36:54,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:54,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:54,031 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 20:36:54,033 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 20:36:54,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:36:54,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:36:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 20:36:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:54,306 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 20:36:54,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:54,396 INFO L321 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-01-27 20:36:54,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 80 [2023-01-27 20:36:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:36:54,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815440971] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:54,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:36:54,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 22 [2023-01-27 20:36:54,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915316072] [2023-01-27 20:36:54,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:36:54,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 20:36:54,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 20:36:54,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:36:54,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 435 [2023-01-27 20:36:54,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 215 transitions, 3722 flow. Second operand has 10 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:54,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:54,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 435 [2023-01-27 20:36:54,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:55,256 INFO L130 PetriNetUnfolder]: 2228/3940 cut-off events. [2023-01-27 20:36:55,256 INFO L131 PetriNetUnfolder]: For 45275/45275 co-relation queries the response was YES. [2023-01-27 20:36:55,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27766 conditions, 3940 events. 2228/3940 cut-off events. For 45275/45275 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 24640 event pairs, 752 based on Foata normal form. 6/3946 useless extension candidates. Maximal degree in co-relation 27688. Up to 2956 conditions per place. [2023-01-27 20:36:55,281 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 181 selfloop transitions, 65 changer transitions 0/246 dead transitions. [2023-01-27 20:36:55,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 246 transitions, 4492 flow [2023-01-27 20:36:55,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:36:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:36:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1412 transitions. [2023-01-27 20:36:55,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32459770114942527 [2023-01-27 20:36:55,283 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1412 transitions. [2023-01-27 20:36:55,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1412 transitions. [2023-01-27 20:36:55,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:55,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1412 transitions. [2023-01-27 20:36:55,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.2) internal successors, (1412), 10 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:55,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:55,286 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:55,287 INFO L175 Difference]: Start difference. First operand has 156 places, 215 transitions, 3722 flow. Second operand 10 states and 1412 transitions. [2023-01-27 20:36:55,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 246 transitions, 4492 flow [2023-01-27 20:36:55,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 246 transitions, 4253 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-01-27 20:36:55,399 INFO L231 Difference]: Finished difference. Result has 158 places, 218 transitions, 3808 flow [2023-01-27 20:36:55,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3808, PETRI_PLACES=158, PETRI_TRANSITIONS=218} [2023-01-27 20:36:55,399 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 133 predicate places. [2023-01-27 20:36:55,399 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 218 transitions, 3808 flow [2023-01-27 20:36:55,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 136.9) internal successors, (1369), 10 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:55,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:55,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:55,411 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 20:36:55,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:55,605 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 20:36:55,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:55,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1175767787, now seen corresponding path program 1 times [2023-01-27 20:36:55,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:55,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886573700] [2023-01-27 20:36:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:55,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:36:55,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:36:55,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886573700] [2023-01-27 20:36:55,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886573700] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:36:55,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561021740] [2023-01-27 20:36:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:55,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:55,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:36:55,942 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 20:36:55,944 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 20:36:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:36:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 20:36:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:36:56,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:56,388 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 128 treesize of output 93 [2023-01-27 20:36:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:36:56,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:36:56,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:36:56,479 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 158 treesize of output 122 [2023-01-27 20:36:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:36:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561021740] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:36:56,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:36:56,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-01-27 20:36:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582247331] [2023-01-27 20:36:56,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:36:56,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 20:36:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:36:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 20:36:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-01-27 20:36:56,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:36:56,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 218 transitions, 3808 flow. Second operand has 26 states, 26 states have (on average 141.15384615384616) internal successors, (3670), 26 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:56,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:36:56,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:36:56,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:36:58,467 INFO L130 PetriNetUnfolder]: 4913/8263 cut-off events. [2023-01-27 20:36:58,468 INFO L131 PetriNetUnfolder]: For 94963/94963 co-relation queries the response was YES. [2023-01-27 20:36:58,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58762 conditions, 8263 events. 4913/8263 cut-off events. For 94963/94963 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 55572 event pairs, 857 based on Foata normal form. 128/8391 useless extension candidates. Maximal degree in co-relation 58283. Up to 2237 conditions per place. [2023-01-27 20:36:58,540 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 508 selfloop transitions, 169 changer transitions 46/723 dead transitions. [2023-01-27 20:36:58,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 723 transitions, 13366 flow [2023-01-27 20:36:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 20:36:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 20:36:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3216 transitions. [2023-01-27 20:36:58,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3360501567398119 [2023-01-27 20:36:58,544 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3216 transitions. [2023-01-27 20:36:58,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3216 transitions. [2023-01-27 20:36:58,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:36:58,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3216 transitions. [2023-01-27 20:36:58,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 146.1818181818182) internal successors, (3216), 22 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:58,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 435.0) internal successors, (10005), 23 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:58,564 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 435.0) internal successors, (10005), 23 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:58,564 INFO L175 Difference]: Start difference. First operand has 158 places, 218 transitions, 3808 flow. Second operand 22 states and 3216 transitions. [2023-01-27 20:36:58,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 723 transitions, 13366 flow [2023-01-27 20:36:59,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 723 transitions, 13023 flow, removed 81 selfloop flow, removed 6 redundant places. [2023-01-27 20:36:59,070 INFO L231 Difference]: Finished difference. Result has 187 places, 340 transitions, 6892 flow [2023-01-27 20:36:59,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=3683, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6892, PETRI_PLACES=187, PETRI_TRANSITIONS=340} [2023-01-27 20:36:59,070 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 162 predicate places. [2023-01-27 20:36:59,070 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 340 transitions, 6892 flow [2023-01-27 20:36:59,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 141.15384615384616) internal successors, (3670), 26 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:36:59,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:36:59,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:36:59,076 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 20:36:59,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:36:59,276 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 20:36:59,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:36:59,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1835803252, now seen corresponding path program 1 times [2023-01-27 20:36:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:36:59,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870126249] [2023-01-27 20:36:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:36:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:36:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:00,029 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 20:37:00,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:00,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870126249] [2023-01-27 20:37:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870126249] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:00,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644416105] [2023-01-27 20:37:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:00,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:00,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:00,031 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 20:37:00,033 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 20:37:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 20:37:00,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:00,210 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 20:37:00,255 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 20:37:00,292 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 20:37:00,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:00,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:37:00,550 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 20:37:00,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:37:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:37:01,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644416105] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:01,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:37:01,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 11] total 28 [2023-01-27 20:37:01,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829949492] [2023-01-27 20:37:01,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:01,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:37:01,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:01,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:37:01,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2023-01-27 20:37:01,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 435 [2023-01-27 20:37:01,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 340 transitions, 6892 flow. Second operand has 11 states, 11 states have (on average 130.8181818181818) internal successors, (1439), 11 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:01,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:01,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 435 [2023-01-27 20:37:01,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:02,970 INFO L130 PetriNetUnfolder]: 4792/8054 cut-off events. [2023-01-27 20:37:02,971 INFO L131 PetriNetUnfolder]: For 113545/113545 co-relation queries the response was YES. [2023-01-27 20:37:03,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62543 conditions, 8054 events. 4792/8054 cut-off events. For 113545/113545 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 53859 event pairs, 1476 based on Foata normal form. 3/8057 useless extension candidates. Maximal degree in co-relation 62050. Up to 6833 conditions per place. [2023-01-27 20:37:03,048 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 359 selfloop transitions, 49 changer transitions 12/420 dead transitions. [2023-01-27 20:37:03,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 420 transitions, 9016 flow [2023-01-27 20:37:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:37:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:37:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1476 transitions. [2023-01-27 20:37:03,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3084639498432602 [2023-01-27 20:37:03,056 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1476 transitions. [2023-01-27 20:37:03,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1476 transitions. [2023-01-27 20:37:03,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:03,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1476 transitions. [2023-01-27 20:37:03,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.1818181818182) internal successors, (1476), 11 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:03,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:03,060 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:03,060 INFO L175 Difference]: Start difference. First operand has 187 places, 340 transitions, 6892 flow. Second operand 11 states and 1476 transitions. [2023-01-27 20:37:03,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 420 transitions, 9016 flow [2023-01-27 20:37:03,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 420 transitions, 8903 flow, removed 46 selfloop flow, removed 5 redundant places. [2023-01-27 20:37:03,665 INFO L231 Difference]: Finished difference. Result has 197 places, 364 transitions, 7327 flow [2023-01-27 20:37:03,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=6783, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7327, PETRI_PLACES=197, PETRI_TRANSITIONS=364} [2023-01-27 20:37:03,665 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 172 predicate places. [2023-01-27 20:37:03,666 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 364 transitions, 7327 flow [2023-01-27 20:37:03,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.8181818181818) internal successors, (1439), 11 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:03,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:03,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:03,674 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 20:37:03,877 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,SelfDestructingSolverStorable35 [2023-01-27 20:37:03,877 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 20:37:03,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:03,877 INFO L85 PathProgramCache]: Analyzing trace with hash 717068420, now seen corresponding path program 2 times [2023-01-27 20:37:03,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:03,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471563779] [2023-01-27 20:37:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:03,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:04,876 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 20:37:04,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:04,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471563779] [2023-01-27 20:37:04,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471563779] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:04,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194278511] [2023-01-27 20:37:04,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:37:04,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:04,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:04,878 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 20:37:04,880 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 20:37:05,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:37:05,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:37:05,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 20:37:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:05,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:05,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:37:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:37:05,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:37:05,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194278511] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:37:05,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:37:05,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2023-01-27 20:37:05,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245007639] [2023-01-27 20:37:05,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:05,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:37:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:05,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:37:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:37:05,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 435 [2023-01-27 20:37:05,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 364 transitions, 7327 flow. Second operand has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:05,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:05,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 435 [2023-01-27 20:37:05,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:06,974 INFO L130 PetriNetUnfolder]: 4930/8337 cut-off events. [2023-01-27 20:37:06,974 INFO L131 PetriNetUnfolder]: For 122167/122167 co-relation queries the response was YES. [2023-01-27 20:37:07,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66339 conditions, 8337 events. 4930/8337 cut-off events. For 122167/122167 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 56742 event pairs, 1346 based on Foata normal form. 6/8343 useless extension candidates. Maximal degree in co-relation 65983. Up to 5953 conditions per place. [2023-01-27 20:37:07,053 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 373 selfloop transitions, 74 changer transitions 24/471 dead transitions. [2023-01-27 20:37:07,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 471 transitions, 10072 flow [2023-01-27 20:37:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:37:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:37:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1355 transitions. [2023-01-27 20:37:07,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34610472541507026 [2023-01-27 20:37:07,060 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1355 transitions. [2023-01-27 20:37:07,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1355 transitions. [2023-01-27 20:37:07,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:07,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1355 transitions. [2023-01-27 20:37:07,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 150.55555555555554) internal successors, (1355), 9 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:07,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:07,063 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:07,063 INFO L175 Difference]: Start difference. First operand has 197 places, 364 transitions, 7327 flow. Second operand 9 states and 1355 transitions. [2023-01-27 20:37:07,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 471 transitions, 10072 flow [2023-01-27 20:37:07,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 471 transitions, 10034 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-01-27 20:37:07,711 INFO L231 Difference]: Finished difference. Result has 202 places, 371 transitions, 7797 flow [2023-01-27 20:37:07,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=7303, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7797, PETRI_PLACES=202, PETRI_TRANSITIONS=371} [2023-01-27 20:37:07,712 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 177 predicate places. [2023-01-27 20:37:07,712 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 371 transitions, 7797 flow [2023-01-27 20:37:07,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:07,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:07,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:07,718 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 20:37:07,917 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,SelfDestructingSolverStorable36 [2023-01-27 20:37:07,917 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 20:37:07,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1526172356, now seen corresponding path program 3 times [2023-01-27 20:37:07,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:07,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145015579] [2023-01-27 20:37:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:07,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:08,512 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 20:37:08,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:08,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145015579] [2023-01-27 20:37:08,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145015579] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:08,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699958376] [2023-01-27 20:37:08,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:37:08,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:08,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:08,513 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 20:37:08,515 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 20:37:08,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-27 20:37:08,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:37:08,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 20:37:08,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:09,056 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:37:09,056 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 79 treesize of output 43 [2023-01-27 20:37:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:37:09,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:37:09,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699958376] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:37:09,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:37:09,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2023-01-27 20:37:09,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730217644] [2023-01-27 20:37:09,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:09,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:37:09,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:09,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:37:09,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:37:09,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 435 [2023-01-27 20:37:09,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 371 transitions, 7797 flow. Second operand has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:09,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:09,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 435 [2023-01-27 20:37:09,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:10,697 INFO L130 PetriNetUnfolder]: 5034/8557 cut-off events. [2023-01-27 20:37:10,697 INFO L131 PetriNetUnfolder]: For 137664/137664 co-relation queries the response was YES. [2023-01-27 20:37:10,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70101 conditions, 8557 events. 5034/8557 cut-off events. For 137664/137664 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 59079 event pairs, 1397 based on Foata normal form. 6/8563 useless extension candidates. Maximal degree in co-relation 69712. Up to 5953 conditions per place. [2023-01-27 20:37:10,787 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 425 selfloop transitions, 70 changer transitions 11/506 dead transitions. [2023-01-27 20:37:10,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 506 transitions, 11503 flow [2023-01-27 20:37:10,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:37:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:37:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1358 transitions. [2023-01-27 20:37:10,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34687100893997447 [2023-01-27 20:37:10,789 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1358 transitions. [2023-01-27 20:37:10,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1358 transitions. [2023-01-27 20:37:10,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:10,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1358 transitions. [2023-01-27 20:37:10,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 150.88888888888889) internal successors, (1358), 9 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:10,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:10,792 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:10,792 INFO L175 Difference]: Start difference. First operand has 202 places, 371 transitions, 7797 flow. Second operand 9 states and 1358 transitions. [2023-01-27 20:37:10,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 506 transitions, 11503 flow [2023-01-27 20:37:11,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 506 transitions, 11185 flow, removed 124 selfloop flow, removed 5 redundant places. [2023-01-27 20:37:11,713 INFO L231 Difference]: Finished difference. Result has 206 places, 387 transitions, 8164 flow [2023-01-27 20:37:11,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=7629, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8164, PETRI_PLACES=206, PETRI_TRANSITIONS=387} [2023-01-27 20:37:11,713 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 181 predicate places. [2023-01-27 20:37:11,713 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 387 transitions, 8164 flow [2023-01-27 20:37:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:11,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:11,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:11,723 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 20:37:11,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-27 20:37:11,914 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 20:37:11,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:11,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1843499728, now seen corresponding path program 4 times [2023-01-27 20:37:11,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:11,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016488762] [2023-01-27 20:37:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:11,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:13,076 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 20:37:13,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016488762] [2023-01-27 20:37:13,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016488762] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960585004] [2023-01-27 20:37:13,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:37:13,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:13,089 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 20:37:13,092 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 20:37:13,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:37:13,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:37:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 20:37:13,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:13,252 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 20:37:13,277 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 20:37:13,294 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 20:37:13,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:13,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:37:13,577 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 20:37:13,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:37:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:37:14,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960585004] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:14,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:37:14,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 12] total 31 [2023-01-27 20:37:14,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197510287] [2023-01-27 20:37:14,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:14,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:37:14,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:14,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:37:14,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:37:14,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 435 [2023-01-27 20:37:14,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 387 transitions, 8164 flow. Second operand has 9 states, 9 states have (on average 147.22222222222223) internal successors, (1325), 9 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:14,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:14,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 435 [2023-01-27 20:37:14,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:16,722 INFO L130 PetriNetUnfolder]: 5081/8651 cut-off events. [2023-01-27 20:37:16,722 INFO L131 PetriNetUnfolder]: For 146992/146992 co-relation queries the response was YES. [2023-01-27 20:37:16,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72574 conditions, 8651 events. 5081/8651 cut-off events. For 146992/146992 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59948 event pairs, 1543 based on Foata normal form. 3/8654 useless extension candidates. Maximal degree in co-relation 72167. Up to 7194 conditions per place. [2023-01-27 20:37:16,825 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 394 selfloop transitions, 61 changer transitions 17/472 dead transitions. [2023-01-27 20:37:16,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 472 transitions, 10692 flow [2023-01-27 20:37:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:37:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:37:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1375 transitions. [2023-01-27 20:37:16,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.351213282247765 [2023-01-27 20:37:16,828 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1375 transitions. [2023-01-27 20:37:16,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1375 transitions. [2023-01-27 20:37:16,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:16,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1375 transitions. [2023-01-27 20:37:16,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.77777777777777) internal successors, (1375), 9 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:16,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:16,831 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:16,831 INFO L175 Difference]: Start difference. First operand has 206 places, 387 transitions, 8164 flow. Second operand 9 states and 1375 transitions. [2023-01-27 20:37:16,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 472 transitions, 10692 flow [2023-01-27 20:37:17,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 472 transitions, 10617 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-01-27 20:37:17,682 INFO L231 Difference]: Finished difference. Result has 213 places, 398 transitions, 8520 flow [2023-01-27 20:37:17,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8093, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8520, PETRI_PLACES=213, PETRI_TRANSITIONS=398} [2023-01-27 20:37:17,683 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2023-01-27 20:37:17,683 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 398 transitions, 8520 flow [2023-01-27 20:37:17,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 147.22222222222223) internal successors, (1325), 9 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:17,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:17,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:17,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-27 20:37:17,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-27 20:37:17,885 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 20:37:17,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:17,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1503335692, now seen corresponding path program 5 times [2023-01-27 20:37:17,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:17,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970341277] [2023-01-27 20:37:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:17,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:18,550 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 20:37:18,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:18,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970341277] [2023-01-27 20:37:18,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970341277] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:18,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978039055] [2023-01-27 20:37:18,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:37:18,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:18,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:18,552 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 20:37:18,553 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 20:37:18,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:37:18,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:37:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 20:37:18,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:18,773 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 20:37:18,818 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 20:37:18,861 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 20:37:19,057 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:37:19,057 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 79 treesize of output 43 [2023-01-27 20:37:19,101 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 20:37:19,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:37:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:37:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978039055] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:19,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:37:19,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11] total 31 [2023-01-27 20:37:19,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796061214] [2023-01-27 20:37:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:19,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:37:19,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:19,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:37:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 20:37:19,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 435 [2023-01-27 20:37:19,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 398 transitions, 8520 flow. Second operand has 11 states, 11 states have (on average 130.8181818181818) internal successors, (1439), 11 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:19,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:19,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 435 [2023-01-27 20:37:19,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:21,739 INFO L130 PetriNetUnfolder]: 5089/8665 cut-off events. [2023-01-27 20:37:21,740 INFO L131 PetriNetUnfolder]: For 149448/149448 co-relation queries the response was YES. [2023-01-27 20:37:21,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73095 conditions, 8665 events. 5089/8665 cut-off events. For 149448/149448 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59875 event pairs, 1539 based on Foata normal form. 3/8668 useless extension candidates. Maximal degree in co-relation 72685. Up to 7187 conditions per place. [2023-01-27 20:37:21,846 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 390 selfloop transitions, 58 changer transitions 10/458 dead transitions. [2023-01-27 20:37:21,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 458 transitions, 10526 flow [2023-01-27 20:37:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:37:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:37:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1478 transitions. [2023-01-27 20:37:21,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3088819226750261 [2023-01-27 20:37:21,848 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1478 transitions. [2023-01-27 20:37:21,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1478 transitions. [2023-01-27 20:37:21,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:21,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1478 transitions. [2023-01-27 20:37:21,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.36363636363637) internal successors, (1478), 11 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:21,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:21,852 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:21,852 INFO L175 Difference]: Start difference. First operand has 213 places, 398 transitions, 8520 flow. Second operand 11 states and 1478 transitions. [2023-01-27 20:37:21,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 458 transitions, 10526 flow [2023-01-27 20:37:22,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 458 transitions, 10402 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-01-27 20:37:22,671 INFO L231 Difference]: Finished difference. Result has 218 places, 399 transitions, 8561 flow [2023-01-27 20:37:22,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8404, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8561, PETRI_PLACES=218, PETRI_TRANSITIONS=399} [2023-01-27 20:37:22,672 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 193 predicate places. [2023-01-27 20:37:22,673 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 399 transitions, 8561 flow [2023-01-27 20:37:22,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.8181818181818) internal successors, (1439), 11 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:22,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:22,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:22,680 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 20:37:22,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-27 20:37:22,881 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 20:37:22,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1925954328, now seen corresponding path program 6 times [2023-01-27 20:37:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:22,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341476567] [2023-01-27 20:37:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:22,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:23,761 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 20:37:23,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:23,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341476567] [2023-01-27 20:37:23,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341476567] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:23,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775567801] [2023-01-27 20:37:23,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:37:23,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:23,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:23,773 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 20:37:23,799 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 20:37:23,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-01-27 20:37:23,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:37:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 20:37:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:24,161 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:37:24,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 43 [2023-01-27 20:37:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:37:24,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:37:24,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775567801] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:37:24,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:37:24,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2023-01-27 20:37:24,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631713500] [2023-01-27 20:37:24,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:24,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:37:24,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:24,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:37:24,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:37:24,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 435 [2023-01-27 20:37:24,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 399 transitions, 8561 flow. Second operand has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:24,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:24,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 435 [2023-01-27 20:37:24,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:26,017 INFO L130 PetriNetUnfolder]: 5120/8754 cut-off events. [2023-01-27 20:37:26,018 INFO L131 PetriNetUnfolder]: For 151349/151349 co-relation queries the response was YES. [2023-01-27 20:37:26,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73814 conditions, 8754 events. 5120/8754 cut-off events. For 151349/151349 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 61199 event pairs, 1410 based on Foata normal form. 9/8763 useless extension candidates. Maximal degree in co-relation 73404. Up to 5953 conditions per place. [2023-01-27 20:37:26,104 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 399 selfloop transitions, 100 changer transitions 11/510 dead transitions. [2023-01-27 20:37:26,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 510 transitions, 11647 flow [2023-01-27 20:37:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:37:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:37:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1358 transitions. [2023-01-27 20:37:26,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34687100893997447 [2023-01-27 20:37:26,106 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1358 transitions. [2023-01-27 20:37:26,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1358 transitions. [2023-01-27 20:37:26,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:26,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1358 transitions. [2023-01-27 20:37:26,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 150.88888888888889) internal successors, (1358), 9 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:26,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:26,109 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:26,109 INFO L175 Difference]: Start difference. First operand has 218 places, 399 transitions, 8561 flow. Second operand 9 states and 1358 transitions. [2023-01-27 20:37:26,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 510 transitions, 11647 flow [2023-01-27 20:37:26,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 510 transitions, 11526 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-01-27 20:37:26,792 INFO L231 Difference]: Finished difference. Result has 221 places, 421 transitions, 9255 flow [2023-01-27 20:37:26,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8460, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9255, PETRI_PLACES=221, PETRI_TRANSITIONS=421} [2023-01-27 20:37:26,793 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 196 predicate places. [2023-01-27 20:37:26,793 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 421 transitions, 9255 flow [2023-01-27 20:37:26,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:26,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:26,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:26,800 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 20:37:26,998 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,SelfDestructingSolverStorable40 [2023-01-27 20:37:26,998 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:37:27,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:27,009 INFO L85 PathProgramCache]: Analyzing trace with hash -804013576, now seen corresponding path program 7 times [2023-01-27 20:37:27,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:27,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238676614] [2023-01-27 20:37:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:27,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:27,701 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 20:37:27,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238676614] [2023-01-27 20:37:27,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238676614] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333074704] [2023-01-27 20:37:27,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:37:27,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:27,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:27,705 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 20:37:27,707 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 20:37:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:27,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 20:37:27,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:27,903 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 20:37:27,935 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 20:37:27,966 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 20:37:28,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:28,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:37:28,177 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 20:37:28,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:37:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:37:28,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333074704] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:28,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:37:28,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11] total 30 [2023-01-27 20:37:28,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047770146] [2023-01-27 20:37:28,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:28,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:37:28,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:28,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:37:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:37:28,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 435 [2023-01-27 20:37:28,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 421 transitions, 9255 flow. Second operand has 11 states, 11 states have (on average 130.8181818181818) internal successors, (1439), 11 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:28,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:28,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 435 [2023-01-27 20:37:28,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:30,698 INFO L130 PetriNetUnfolder]: 5093/8700 cut-off events. [2023-01-27 20:37:30,698 INFO L131 PetriNetUnfolder]: For 155236/155236 co-relation queries the response was YES. [2023-01-27 20:37:30,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74360 conditions, 8700 events. 5093/8700 cut-off events. For 155236/155236 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 60496 event pairs, 1537 based on Foata normal form. 6/8706 useless extension candidates. Maximal degree in co-relation 73962. Up to 7267 conditions per place. [2023-01-27 20:37:30,790 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 368 selfloop transitions, 83 changer transitions 24/475 dead transitions. [2023-01-27 20:37:30,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 475 transitions, 11114 flow [2023-01-27 20:37:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:37:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:37:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1482 transitions. [2023-01-27 20:37:30,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30971786833855797 [2023-01-27 20:37:30,793 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1482 transitions. [2023-01-27 20:37:30,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1482 transitions. [2023-01-27 20:37:30,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:30,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1482 transitions. [2023-01-27 20:37:30,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.72727272727272) internal successors, (1482), 11 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:30,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:30,797 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:30,797 INFO L175 Difference]: Start difference. First operand has 221 places, 421 transitions, 9255 flow. Second operand 11 states and 1482 transitions. [2023-01-27 20:37:30,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 475 transitions, 11114 flow [2023-01-27 20:37:31,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 475 transitions, 10973 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-01-27 20:37:31,626 INFO L231 Difference]: Finished difference. Result has 229 places, 423 transitions, 9380 flow [2023-01-27 20:37:31,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9118, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9380, PETRI_PLACES=229, PETRI_TRANSITIONS=423} [2023-01-27 20:37:31,627 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 204 predicate places. [2023-01-27 20:37:31,627 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 423 transitions, 9380 flow [2023-01-27 20:37:31,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.8181818181818) internal successors, (1439), 11 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:31,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:31,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:31,634 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 20:37:31,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:31,833 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:37:31,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:31,833 INFO L85 PathProgramCache]: Analyzing trace with hash -371235756, now seen corresponding path program 8 times [2023-01-27 20:37:31,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:31,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819459946] [2023-01-27 20:37:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:31,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:32,405 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 20:37:32,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:32,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819459946] [2023-01-27 20:37:32,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819459946] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:32,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274693377] [2023-01-27 20:37:32,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:37:32,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:32,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:32,407 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 20:37:32,408 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 20:37:32,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:37:32,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:37:32,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 20:37:32,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:32,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:32,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:37:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:37:32,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:37:32,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274693377] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:37:32,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:37:32,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-01-27 20:37:32,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328608322] [2023-01-27 20:37:32,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:32,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:37:32,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:32,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:37:32,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:37:32,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 435 [2023-01-27 20:37:32,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 423 transitions, 9380 flow. Second operand has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:32,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:32,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 435 [2023-01-27 20:37:32,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:34,847 INFO L130 PetriNetUnfolder]: 5062/8711 cut-off events. [2023-01-27 20:37:34,847 INFO L131 PetriNetUnfolder]: For 152216/152216 co-relation queries the response was YES. [2023-01-27 20:37:34,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73933 conditions, 8711 events. 5062/8711 cut-off events. For 152216/152216 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 61258 event pairs, 1394 based on Foata normal form. 6/8717 useless extension candidates. Maximal degree in co-relation 73586. Up to 5953 conditions per place. [2023-01-27 20:37:34,942 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 365 selfloop transitions, 102 changer transitions 38/505 dead transitions. [2023-01-27 20:37:34,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 505 transitions, 11619 flow [2023-01-27 20:37:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:37:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:37:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1363 transitions. [2023-01-27 20:37:34,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34814814814814815 [2023-01-27 20:37:34,944 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1363 transitions. [2023-01-27 20:37:34,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1363 transitions. [2023-01-27 20:37:34,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:34,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1363 transitions. [2023-01-27 20:37:34,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.44444444444446) internal successors, (1363), 9 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:34,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:34,947 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:34,947 INFO L175 Difference]: Start difference. First operand has 229 places, 423 transitions, 9380 flow. Second operand 9 states and 1363 transitions. [2023-01-27 20:37:34,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 505 transitions, 11619 flow [2023-01-27 20:37:35,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 505 transitions, 11523 flow, removed 31 selfloop flow, removed 7 redundant places. [2023-01-27 20:37:35,717 INFO L231 Difference]: Finished difference. Result has 232 places, 410 transitions, 9160 flow [2023-01-27 20:37:35,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9294, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9160, PETRI_PLACES=232, PETRI_TRANSITIONS=410} [2023-01-27 20:37:35,718 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 207 predicate places. [2023-01-27 20:37:35,718 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 410 transitions, 9160 flow [2023-01-27 20:37:35,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:35,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:35,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:35,725 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 20:37:35,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:35,923 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:37:35,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:35,924 INFO L85 PathProgramCache]: Analyzing trace with hash 833066182, now seen corresponding path program 9 times [2023-01-27 20:37:35,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:35,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057065132] [2023-01-27 20:37:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:35,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:36,694 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 20:37:36,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:36,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057065132] [2023-01-27 20:37:36,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057065132] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:36,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683221384] [2023-01-27 20:37:36,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:37:36,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:36,696 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 20:37:36,697 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 20:37:36,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-27 20:37:36,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:37:36,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 20:37:36,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:37,081 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:37:37,082 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 79 treesize of output 43 [2023-01-27 20:37:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:37:37,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:37:37,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683221384] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:37:37,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:37:37,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 21 [2023-01-27 20:37:37,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92032810] [2023-01-27 20:37:37,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:37,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:37:37,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:37,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:37:37,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2023-01-27 20:37:37,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 435 [2023-01-27 20:37:37,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 410 transitions, 9160 flow. Second operand has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:37,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:37,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 435 [2023-01-27 20:37:37,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:38,952 INFO L130 PetriNetUnfolder]: 5004/8605 cut-off events. [2023-01-27 20:37:38,953 INFO L131 PetriNetUnfolder]: For 155290/155290 co-relation queries the response was YES. [2023-01-27 20:37:39,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73461 conditions, 8605 events. 5004/8605 cut-off events. For 155290/155290 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 60450 event pairs, 1392 based on Foata normal form. 6/8611 useless extension candidates. Maximal degree in co-relation 73043. Up to 5953 conditions per place. [2023-01-27 20:37:39,041 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 349 selfloop transitions, 115 changer transitions 11/475 dead transitions. [2023-01-27 20:37:39,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 475 transitions, 11073 flow [2023-01-27 20:37:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:37:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:37:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1359 transitions. [2023-01-27 20:37:39,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3471264367816092 [2023-01-27 20:37:39,043 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1359 transitions. [2023-01-27 20:37:39,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1359 transitions. [2023-01-27 20:37:39,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:39,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1359 transitions. [2023-01-27 20:37:39,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.0) internal successors, (1359), 9 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:39,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:39,046 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:39,046 INFO L175 Difference]: Start difference. First operand has 232 places, 410 transitions, 9160 flow. Second operand 9 states and 1359 transitions. [2023-01-27 20:37:39,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 475 transitions, 11073 flow [2023-01-27 20:37:39,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 475 transitions, 10894 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-01-27 20:37:39,819 INFO L231 Difference]: Finished difference. Result has 235 places, 420 transitions, 9500 flow [2023-01-27 20:37:39,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9015, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9500, PETRI_PLACES=235, PETRI_TRANSITIONS=420} [2023-01-27 20:37:39,819 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 210 predicate places. [2023-01-27 20:37:39,819 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 420 transitions, 9500 flow [2023-01-27 20:37:39,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:39,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:39,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:39,824 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 20:37:40,021 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,SelfDestructingSolverStorable43 [2023-01-27 20:37:40,021 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:37:40,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1324051588, now seen corresponding path program 10 times [2023-01-27 20:37:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:40,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583919494] [2023-01-27 20:37:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:40,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:40,725 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 20:37:40,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:40,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583919494] [2023-01-27 20:37:40,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583919494] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:40,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38755859] [2023-01-27 20:37:40,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:37:40,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:40,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:40,727 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 20:37:40,728 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 20:37:40,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:37:40,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:37:40,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 20:37:40,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:40,907 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 20:37:40,934 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 20:37:40,960 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 20:37:41,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:41,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:37:41,378 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 20:37:41,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:37:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:37:41,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38755859] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:41,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:37:41,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 12] total 33 [2023-01-27 20:37:41,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220849149] [2023-01-27 20:37:41,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:41,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:37:41,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:41,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:37:41,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2023-01-27 20:37:41,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 435 [2023-01-27 20:37:41,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 420 transitions, 9500 flow. Second operand has 9 states, 9 states have (on average 147.22222222222223) internal successors, (1325), 9 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:41,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:41,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 435 [2023-01-27 20:37:41,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:44,307 INFO L130 PetriNetUnfolder]: 4980/8584 cut-off events. [2023-01-27 20:37:44,307 INFO L131 PetriNetUnfolder]: For 157362/157362 co-relation queries the response was YES. [2023-01-27 20:37:44,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73588 conditions, 8584 events. 4980/8584 cut-off events. For 157362/157362 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 60372 event pairs, 1478 based on Foata normal form. 3/8587 useless extension candidates. Maximal degree in co-relation 73154. Up to 6654 conditions per place. [2023-01-27 20:37:44,402 INFO L137 encePairwiseOnDemand]: 421/435 looper letters, 356 selfloop transitions, 87 changer transitions 19/462 dead transitions. [2023-01-27 20:37:44,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 462 transitions, 10856 flow [2023-01-27 20:37:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:37:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:37:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1522 transitions. [2023-01-27 20:37:44,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34988505747126436 [2023-01-27 20:37:44,418 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1522 transitions. [2023-01-27 20:37:44,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1522 transitions. [2023-01-27 20:37:44,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:44,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1522 transitions. [2023-01-27 20:37:44,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 152.2) internal successors, (1522), 10 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 20:37:44,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:44,445 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:44,445 INFO L175 Difference]: Start difference. First operand has 235 places, 420 transitions, 9500 flow. Second operand 10 states and 1522 transitions. [2023-01-27 20:37:44,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 462 transitions, 10856 flow [2023-01-27 20:37:45,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 462 transitions, 10630 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-01-27 20:37:45,268 INFO L231 Difference]: Finished difference. Result has 241 places, 411 transitions, 9209 flow [2023-01-27 20:37:45,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9284, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9209, PETRI_PLACES=241, PETRI_TRANSITIONS=411} [2023-01-27 20:37:45,269 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 216 predicate places. [2023-01-27 20:37:45,269 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 411 transitions, 9209 flow [2023-01-27 20:37:45,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 147.22222222222223) internal successors, (1325), 9 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:45,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:45,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:45,275 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 20:37:45,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:45,475 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:37:45,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash 460643924, now seen corresponding path program 11 times [2023-01-27 20:37:45,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:45,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411982479] [2023-01-27 20:37:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:45,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:46,254 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 20:37:46,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411982479] [2023-01-27 20:37:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411982479] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004876865] [2023-01-27 20:37:46,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:37:46,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:46,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:46,255 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:37:46,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-27 20:37:46,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:37:46,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:37:46,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-27 20:37:46,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:46,467 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 20:37:46,504 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 20:37:46,541 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 20:37:46,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:46,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:37:47,001 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 20:37:47,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:37:49,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:49,895 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 47 treesize of output 36 [2023-01-27 20:37:49,905 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:37:49,905 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 1142 treesize of output 1021 [2023-01-27 20:37:49,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:49,928 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 246 treesize of output 238 [2023-01-27 20:37:49,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:49,938 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 230 treesize of output 206 [2023-01-27 20:37:50,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:50,252 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 47 treesize of output 36 [2023-01-27 20:37:50,261 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:37:50,262 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 278 treesize of output 253 [2023-01-27 20:37:50,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:50,274 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 246 treesize of output 238 [2023-01-27 20:37:50,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:50,287 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 230 treesize of output 206 [2023-01-27 20:37:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:37:50,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004876865] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:37:50,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:37:50,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-01-27 20:37:50,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742210540] [2023-01-27 20:37:50,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:37:50,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 20:37:50,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:50,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 20:37:50,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1203, Unknown=15, NotChecked=0, Total=1482 [2023-01-27 20:37:50,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 435 [2023-01-27 20:37:50,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 411 transitions, 9209 flow. Second operand has 39 states, 39 states have (on average 107.41025641025641) internal successors, (4189), 39 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:50,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:50,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 435 [2023-01-27 20:37:50,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:54,610 INFO L130 PetriNetUnfolder]: 5038/8719 cut-off events. [2023-01-27 20:37:54,611 INFO L131 PetriNetUnfolder]: For 162530/162530 co-relation queries the response was YES. [2023-01-27 20:37:54,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74530 conditions, 8719 events. 5038/8719 cut-off events. For 162530/162530 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 61947 event pairs, 840 based on Foata normal form. 38/8757 useless extension candidates. Maximal degree in co-relation 74079. Up to 5284 conditions per place. [2023-01-27 20:37:54,715 INFO L137 encePairwiseOnDemand]: 420/435 looper letters, 266 selfloop transitions, 254 changer transitions 24/544 dead transitions. [2023-01-27 20:37:54,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 544 transitions, 12138 flow [2023-01-27 20:37:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 20:37:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 20:37:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2988 transitions. [2023-01-27 20:37:54,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25440613026819925 [2023-01-27 20:37:54,718 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2988 transitions. [2023-01-27 20:37:54,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2988 transitions. [2023-01-27 20:37:54,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:54,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2988 transitions. [2023-01-27 20:37:54,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 110.66666666666667) internal successors, (2988), 27 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 20:37:54,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 435.0) internal successors, (12180), 28 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:54,726 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 435.0) internal successors, (12180), 28 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:54,726 INFO L175 Difference]: Start difference. First operand has 241 places, 411 transitions, 9209 flow. Second operand 27 states and 2988 transitions. [2023-01-27 20:37:54,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 544 transitions, 12138 flow [2023-01-27 20:37:55,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 544 transitions, 11962 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-01-27 20:37:55,651 INFO L231 Difference]: Finished difference. Result has 259 places, 446 transitions, 10324 flow [2023-01-27 20:37:55,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9050, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10324, PETRI_PLACES=259, PETRI_TRANSITIONS=446} [2023-01-27 20:37:55,652 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 234 predicate places. [2023-01-27 20:37:55,652 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 446 transitions, 10324 flow [2023-01-27 20:37:55,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 107.41025641025641) internal successors, (4189), 39 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:55,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:37:55,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:37:55,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-27 20:37:55,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-27 20:37:55,858 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:37:55,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:37:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1370477854, now seen corresponding path program 12 times [2023-01-27 20:37:55,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:37:55,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760104262] [2023-01-27 20:37:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:37:55,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:37:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:37:56,618 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 20:37:56,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:37:56,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760104262] [2023-01-27 20:37:56,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760104262] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:37:56,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195004739] [2023-01-27 20:37:56,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:37:56,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:37:56,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:37:56,620 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:37:56,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-27 20:37:56,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-01-27 20:37:56,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:37:56,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 20:37:56,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:37:57,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:37:57,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:37:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:37:57,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:37:57,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195004739] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:37:57,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:37:57,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-01-27 20:37:57,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033301170] [2023-01-27 20:37:57,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:37:57,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:37:57,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:37:57,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:37:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:37:57,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 435 [2023-01-27 20:37:57,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 446 transitions, 10324 flow. Second operand has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:57,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:37:57,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 435 [2023-01-27 20:37:57,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:37:58,969 INFO L130 PetriNetUnfolder]: 5021/8687 cut-off events. [2023-01-27 20:37:58,969 INFO L131 PetriNetUnfolder]: For 177126/177126 co-relation queries the response was YES. [2023-01-27 20:37:59,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77349 conditions, 8687 events. 5021/8687 cut-off events. For 177126/177126 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61693 event pairs, 876 based on Foata normal form. 3/8690 useless extension candidates. Maximal degree in co-relation 77228. Up to 5440 conditions per place. [2023-01-27 20:37:59,083 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 294 selfloop transitions, 180 changer transitions 18/492 dead transitions. [2023-01-27 20:37:59,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 492 transitions, 11780 flow [2023-01-27 20:37:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:37:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:37:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1355 transitions. [2023-01-27 20:37:59,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34610472541507026 [2023-01-27 20:37:59,085 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1355 transitions. [2023-01-27 20:37:59,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1355 transitions. [2023-01-27 20:37:59,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:37:59,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1355 transitions. [2023-01-27 20:37:59,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 150.55555555555554) internal successors, (1355), 9 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:59,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:59,088 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:37:59,088 INFO L175 Difference]: Start difference. First operand has 259 places, 446 transitions, 10324 flow. Second operand 9 states and 1355 transitions. [2023-01-27 20:37:59,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 492 transitions, 11780 flow [2023-01-27 20:38:00,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 492 transitions, 11048 flow, removed 103 selfloop flow, removed 24 redundant places. [2023-01-27 20:38:00,182 INFO L231 Difference]: Finished difference. Result has 242 places, 438 transitions, 9846 flow [2023-01-27 20:38:00,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9624, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9846, PETRI_PLACES=242, PETRI_TRANSITIONS=438} [2023-01-27 20:38:00,182 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 217 predicate places. [2023-01-27 20:38:00,183 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 438 transitions, 9846 flow [2023-01-27 20:38:00,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:00,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:38:00,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:38:00,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-27 20:38:00,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:00,388 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:38:00,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:38:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1337180468, now seen corresponding path program 13 times [2023-01-27 20:38:00,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:38:00,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443549407] [2023-01-27 20:38:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:38:00,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:38:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:00,936 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 20:38:00,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:38:00,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443549407] [2023-01-27 20:38:00,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443549407] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:00,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375820288] [2023-01-27 20:38:00,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:38:00,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:00,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:38:00,938 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:38:00,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-27 20:38:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:01,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 20:38:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:38:01,144 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 20:38:01,181 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 20:38:01,217 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 20:38:01,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:01,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:38:01,499 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 20:38:01,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:38:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:38:01,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375820288] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:01,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:38:01,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11] total 31 [2023-01-27 20:38:01,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627940093] [2023-01-27 20:38:01,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:38:01,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:38:01,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:38:01,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:38:01,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 20:38:01,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 435 [2023-01-27 20:38:01,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 438 transitions, 9846 flow. Second operand has 11 states, 11 states have (on average 130.8181818181818) internal successors, (1439), 11 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:01,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:38:01,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 435 [2023-01-27 20:38:01,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:38:03,946 INFO L130 PetriNetUnfolder]: 5002/8623 cut-off events. [2023-01-27 20:38:03,947 INFO L131 PetriNetUnfolder]: For 176284/176284 co-relation queries the response was YES. [2023-01-27 20:38:04,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77092 conditions, 8623 events. 5002/8623 cut-off events. For 176284/176284 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 60793 event pairs, 876 based on Foata normal form. 3/8626 useless extension candidates. Maximal degree in co-relation 76852. Up to 5434 conditions per place. [2023-01-27 20:38:04,049 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 260 selfloop transitions, 195 changer transitions 20/475 dead transitions. [2023-01-27 20:38:04,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 475 transitions, 11187 flow [2023-01-27 20:38:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:38:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:38:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1477 transitions. [2023-01-27 20:38:04,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30867293625914316 [2023-01-27 20:38:04,051 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1477 transitions. [2023-01-27 20:38:04,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1477 transitions. [2023-01-27 20:38:04,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:38:04,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1477 transitions. [2023-01-27 20:38:04,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.27272727272728) internal successors, (1477), 11 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:04,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:04,054 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:04,055 INFO L175 Difference]: Start difference. First operand has 242 places, 438 transitions, 9846 flow. Second operand 11 states and 1477 transitions. [2023-01-27 20:38:04,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 475 transitions, 11187 flow [2023-01-27 20:38:04,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 475 transitions, 10827 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-01-27 20:38:04,959 INFO L231 Difference]: Finished difference. Result has 244 places, 428 transitions, 9622 flow [2023-01-27 20:38:04,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9494, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9622, PETRI_PLACES=244, PETRI_TRANSITIONS=428} [2023-01-27 20:38:04,960 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 219 predicate places. [2023-01-27 20:38:04,960 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 428 transitions, 9622 flow [2023-01-27 20:38:04,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 130.8181818181818) internal successors, (1439), 11 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:04,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:38:04,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:38:04,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-27 20:38:05,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-27 20:38:05,165 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:38:05,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:38:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1229202098, now seen corresponding path program 14 times [2023-01-27 20:38:05,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:38:05,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466647702] [2023-01-27 20:38:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:38:05,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:38:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:05,650 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 20:38:05,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:38:05,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466647702] [2023-01-27 20:38:05,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466647702] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:05,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270406293] [2023-01-27 20:38:05,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:38:05,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:05,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:38:05,652 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:38:05,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-27 20:38:05,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:38:05,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:38:05,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 20:38:05,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:38:06,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:06,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:38:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:38:06,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:38:06,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270406293] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:38:06,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:38:06,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-01-27 20:38:06,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693802908] [2023-01-27 20:38:06,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:38:06,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:38:06,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:38:06,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:38:06,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-01-27 20:38:06,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:38:06,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 428 transitions, 9622 flow. Second operand has 11 states, 11 states have (on average 140.8181818181818) internal successors, (1549), 11 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:06,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:38:06,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:38:06,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:38:08,198 INFO L130 PetriNetUnfolder]: 4977/8565 cut-off events. [2023-01-27 20:38:08,198 INFO L131 PetriNetUnfolder]: For 174470/174470 co-relation queries the response was YES. [2023-01-27 20:38:08,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76621 conditions, 8565 events. 4977/8565 cut-off events. For 174470/174470 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 60086 event pairs, 924 based on Foata normal form. 3/8568 useless extension candidates. Maximal degree in co-relation 76449. Up to 5690 conditions per place. [2023-01-27 20:38:08,297 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 258 selfloop transitions, 180 changer transitions 24/462 dead transitions. [2023-01-27 20:38:08,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 462 transitions, 10864 flow [2023-01-27 20:38:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:38:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:38:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1312 transitions. [2023-01-27 20:38:08,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3351213282247765 [2023-01-27 20:38:08,321 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1312 transitions. [2023-01-27 20:38:08,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1312 transitions. [2023-01-27 20:38:08,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:38:08,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1312 transitions. [2023-01-27 20:38:08,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.77777777777777) internal successors, (1312), 9 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:08,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:08,324 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:08,324 INFO L175 Difference]: Start difference. First operand has 244 places, 428 transitions, 9622 flow. Second operand 9 states and 1312 transitions. [2023-01-27 20:38:08,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 462 transitions, 10864 flow [2023-01-27 20:38:09,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 462 transitions, 10356 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-01-27 20:38:09,264 INFO L231 Difference]: Finished difference. Result has 235 places, 409 transitions, 9089 flow [2023-01-27 20:38:09,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9116, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9089, PETRI_PLACES=235, PETRI_TRANSITIONS=409} [2023-01-27 20:38:09,265 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 210 predicate places. [2023-01-27 20:38:09,265 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 409 transitions, 9089 flow [2023-01-27 20:38:09,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 140.8181818181818) internal successors, (1549), 11 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:09,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:38:09,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:38:09,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-27 20:38:09,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-27 20:38:09,471 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:38:09,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:38:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1861463260, now seen corresponding path program 15 times [2023-01-27 20:38:09,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:38:09,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739947529] [2023-01-27 20:38:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:38:09,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:38:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:10,253 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 20:38:10,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:38:10,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739947529] [2023-01-27 20:38:10,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739947529] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:10,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105060491] [2023-01-27 20:38:10,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:38:10,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:10,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:38:10,269 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:38:10,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-27 20:38:10,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-01-27 20:38:10,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:38:10,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 20:38:10,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:38:10,670 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:38:10,670 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 79 treesize of output 43 [2023-01-27 20:38:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:38:10,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:38:10,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105060491] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:38:10,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:38:10,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-01-27 20:38:10,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736137188] [2023-01-27 20:38:10,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:38:10,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:38:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:38:10,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:38:10,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:38:10,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 435 [2023-01-27 20:38:10,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 409 transitions, 9089 flow. Second operand has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:10,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:38:10,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 435 [2023-01-27 20:38:10,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:38:12,499 INFO L130 PetriNetUnfolder]: 4946/8498 cut-off events. [2023-01-27 20:38:12,500 INFO L131 PetriNetUnfolder]: For 170451/170451 co-relation queries the response was YES. [2023-01-27 20:38:12,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75278 conditions, 8498 events. 4946/8498 cut-off events. For 170451/170451 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 59507 event pairs, 876 based on Foata normal form. 3/8501 useless extension candidates. Maximal degree in co-relation 74868. Up to 5440 conditions per place. [2023-01-27 20:38:12,583 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 261 selfloop transitions, 163 changer transitions 18/442 dead transitions. [2023-01-27 20:38:12,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 442 transitions, 10298 flow [2023-01-27 20:38:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:38:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:38:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1343 transitions. [2023-01-27 20:38:12,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34303959131545336 [2023-01-27 20:38:12,593 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1343 transitions. [2023-01-27 20:38:12,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1343 transitions. [2023-01-27 20:38:12,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:38:12,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1343 transitions. [2023-01-27 20:38:12,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.22222222222223) internal successors, (1343), 9 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:12,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:12,596 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:12,597 INFO L175 Difference]: Start difference. First operand has 235 places, 409 transitions, 9089 flow. Second operand 9 states and 1343 transitions. [2023-01-27 20:38:12,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 442 transitions, 10298 flow [2023-01-27 20:38:13,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 442 transitions, 9927 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-01-27 20:38:13,341 INFO L231 Difference]: Finished difference. Result has 234 places, 400 transitions, 8867 flow [2023-01-27 20:38:13,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8720, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8867, PETRI_PLACES=234, PETRI_TRANSITIONS=400} [2023-01-27 20:38:13,342 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 209 predicate places. [2023-01-27 20:38:13,342 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 400 transitions, 8867 flow [2023-01-27 20:38:13,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:13,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:38:13,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:38:13,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-27 20:38:13,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-27 20:38:13,548 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:38:13,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:38:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1828364272, now seen corresponding path program 16 times [2023-01-27 20:38:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:38:13,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513776737] [2023-01-27 20:38:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:38:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:38:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:14,519 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 20:38:14,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:38:14,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513776737] [2023-01-27 20:38:14,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513776737] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:14,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367411072] [2023-01-27 20:38:14,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:38:14,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:14,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:38:14,521 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:38:14,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-27 20:38:14,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:38:14,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:38:14,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 20:38:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:38:14,714 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 20:38:14,755 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 20:38:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:38:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:38:14,976 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:38:14,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2023-01-27 20:38:15,149 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:38:15,150 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 79 treesize of output 43 [2023-01-27 20:38:15,188 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 20:38:15,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:38:15,538 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (select (select |c_#memory_int| c_~get2~0.base) (+ c_~get2~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) (.cse0 (< 0 c_~n1~0)) (.cse1 (< 0 c_~n2~0))) (and (or (and .cse0 .cse1 (forall ((v_ArrVal_1729 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1729))) (let ((.cse3 (select (select .cse4 c_~get2~0.base) c_~get2~0.offset)) (.cse2 (select (select .cse4 c_~get1~0.base) c_~get1~0.offset))) (or (= .cse2 .cse3) (< .cse3 .cse2)))))) (< |c_thread1Thread1of1ForFork0_#t~mem4| .cse5)) (or (<= .cse5 |c_thread1Thread1of1ForFork0_#t~mem4|) (and .cse0 .cse1 (forall ((v_ArrVal_1729 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1729))) (<= (select (select .cse6 c_~get1~0.base) c_~get1~0.offset) (select (select .cse6 c_~get2~0.base) c_~get2~0.offset)))))))) is different from false [2023-01-27 20:38:15,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:15,976 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 89 treesize of output 53 [2023-01-27 20:38:15,983 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:38:15,983 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 631 treesize of output 551 [2023-01-27 20:38:16,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:16,017 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 295 treesize of output 279 [2023-01-27 20:38:16,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:16,026 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 230 treesize of output 206 [2023-01-27 20:38:16,674 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-01-27 20:38:16,674 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 136 treesize of output 1 [2023-01-27 20:38:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:38:16,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367411072] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:38:16,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:38:16,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-01-27 20:38:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357943984] [2023-01-27 20:38:16,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:38:16,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-27 20:38:16,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:38:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-27 20:38:16,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1094, Unknown=24, NotChecked=68, Total=1332 [2023-01-27 20:38:16,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 435 [2023-01-27 20:38:16,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 400 transitions, 8867 flow. Second operand has 37 states, 37 states have (on average 111.62162162162163) internal successors, (4130), 37 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:16,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:38:16,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 435 [2023-01-27 20:38:16,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:38:19,415 INFO L130 PetriNetUnfolder]: 4897/8429 cut-off events. [2023-01-27 20:38:19,416 INFO L131 PetriNetUnfolder]: For 171242/171242 co-relation queries the response was YES. [2023-01-27 20:38:19,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74392 conditions, 8429 events. 4897/8429 cut-off events. For 171242/171242 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 59156 event pairs, 1346 based on Foata normal form. 39/8468 useless extension candidates. Maximal degree in co-relation 73982. Up to 5979 conditions per place. [2023-01-27 20:38:19,510 INFO L137 encePairwiseOnDemand]: 421/435 looper letters, 319 selfloop transitions, 126 changer transitions 26/471 dead transitions. [2023-01-27 20:38:19,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 471 transitions, 11095 flow [2023-01-27 20:38:19,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 20:38:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 20:38:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1504 transitions. [2023-01-27 20:38:19,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26595932802829353 [2023-01-27 20:38:19,511 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1504 transitions. [2023-01-27 20:38:19,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1504 transitions. [2023-01-27 20:38:19,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:38:19,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1504 transitions. [2023-01-27 20:38:19,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.6923076923077) internal successors, (1504), 13 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:19,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 435.0) internal successors, (6090), 14 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:19,515 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 435.0) internal successors, (6090), 14 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:19,515 INFO L175 Difference]: Start difference. First operand has 234 places, 400 transitions, 8867 flow. Second operand 13 states and 1504 transitions. [2023-01-27 20:38:19,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 471 transitions, 11095 flow [2023-01-27 20:38:20,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 471 transitions, 10755 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-01-27 20:38:20,357 INFO L231 Difference]: Finished difference. Result has 235 places, 401 transitions, 8919 flow [2023-01-27 20:38:20,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8481, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8919, PETRI_PLACES=235, PETRI_TRANSITIONS=401} [2023-01-27 20:38:20,358 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 210 predicate places. [2023-01-27 20:38:20,358 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 401 transitions, 8919 flow [2023-01-27 20:38:20,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 111.62162162162163) internal successors, (4130), 37 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:20,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:38:20,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:38:20,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-27 20:38:20,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-01-27 20:38:20,564 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:38:20,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:38:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash -670017954, now seen corresponding path program 17 times [2023-01-27 20:38:20,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:38:20,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326954691] [2023-01-27 20:38:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:38:20,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:38:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:21,330 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 20:38:21,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:38:21,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326954691] [2023-01-27 20:38:21,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326954691] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:21,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917195630] [2023-01-27 20:38:21,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:38:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:38:21,332 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:38:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-27 20:38:21,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:38:21,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:38:21,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-27 20:38:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:38:21,576 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 20:38:21,624 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 20:38:21,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:38:21,769 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 20:38:21,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:21,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:38:22,026 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 20:38:22,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:38:22,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:22,714 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 139 treesize of output 79 [2023-01-27 20:38:22,727 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:38:22,727 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 2568 treesize of output 2264 [2023-01-27 20:38:22,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:22,800 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 604 treesize of output 568 [2023-01-27 20:38:22,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:22,820 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 513 treesize of output 449 [2023-01-27 20:38:24,173 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-01-27 20:38:24,173 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 92 treesize of output 1 [2023-01-27 20:38:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:38:30,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917195630] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:38:30,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:38:30,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 34 [2023-01-27 20:38:30,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712173333] [2023-01-27 20:38:30,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:38:30,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-27 20:38:30,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:38:30,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-27 20:38:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1076, Unknown=21, NotChecked=0, Total=1260 [2023-01-27 20:38:30,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 435 [2023-01-27 20:38:30,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 401 transitions, 8919 flow. Second operand has 36 states, 36 states have (on average 111.55555555555556) internal successors, (4016), 36 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:30,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:38:30,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 435 [2023-01-27 20:38:30,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:38:33,330 INFO L130 PetriNetUnfolder]: 4790/8269 cut-off events. [2023-01-27 20:38:33,331 INFO L131 PetriNetUnfolder]: For 161972/161972 co-relation queries the response was YES. [2023-01-27 20:38:33,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72264 conditions, 8269 events. 4790/8269 cut-off events. For 161972/161972 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 57948 event pairs, 1373 based on Foata normal form. 36/8305 useless extension candidates. Maximal degree in co-relation 71851. Up to 5972 conditions per place. [2023-01-27 20:38:33,425 INFO L137 encePairwiseOnDemand]: 420/435 looper letters, 303 selfloop transitions, 134 changer transitions 28/465 dead transitions. [2023-01-27 20:38:33,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 465 transitions, 11125 flow [2023-01-27 20:38:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:38:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:38:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1609 transitions. [2023-01-27 20:38:33,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26420361247947455 [2023-01-27 20:38:33,428 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1609 transitions. [2023-01-27 20:38:33,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1609 transitions. [2023-01-27 20:38:33,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:38:33,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1609 transitions. [2023-01-27 20:38:33,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.92857142857143) internal successors, (1609), 14 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:33,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:33,432 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:33,432 INFO L175 Difference]: Start difference. First operand has 235 places, 401 transitions, 8919 flow. Second operand 14 states and 1609 transitions. [2023-01-27 20:38:33,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 465 transitions, 11125 flow [2023-01-27 20:38:34,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 465 transitions, 10962 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-01-27 20:38:34,169 INFO L231 Difference]: Finished difference. Result has 237 places, 400 transitions, 9166 flow [2023-01-27 20:38:34,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8659, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9166, PETRI_PLACES=237, PETRI_TRANSITIONS=400} [2023-01-27 20:38:34,177 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 212 predicate places. [2023-01-27 20:38:34,177 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 400 transitions, 9166 flow [2023-01-27 20:38:34,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 111.55555555555556) internal successors, (4016), 36 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:34,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:38:34,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:38:34,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-27 20:38:34,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:34,383 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:38:34,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:38:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash 628445230, now seen corresponding path program 18 times [2023-01-27 20:38:34,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:38:34,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085419709] [2023-01-27 20:38:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:38:34,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:38:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:35,301 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 20:38:35,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:38:35,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085419709] [2023-01-27 20:38:35,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085419709] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:35,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425466237] [2023-01-27 20:38:35,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:38:35,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:35,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:38:35,303 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:38:35,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-27 20:38:35,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-01-27 20:38:35,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:38:35,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:38:35,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:38:35,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:38:35,658 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 20:38:35,783 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 20:38:35,783 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 79 treesize of output 43 [2023-01-27 20:38:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:38:35,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:38:35,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425466237] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:38:35,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:38:35,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 23 [2023-01-27 20:38:35,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152117560] [2023-01-27 20:38:35,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:38:35,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:38:35,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:38:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:38:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2023-01-27 20:38:35,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:38:35,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 400 transitions, 9166 flow. Second operand has 12 states, 12 states have (on average 140.66666666666666) internal successors, (1688), 12 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:35,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:38:35,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:38:35,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:38:37,792 INFO L130 PetriNetUnfolder]: 4760/8181 cut-off events. [2023-01-27 20:38:37,792 INFO L131 PetriNetUnfolder]: For 156631/156631 co-relation queries the response was YES. [2023-01-27 20:38:37,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71758 conditions, 8181 events. 4760/8181 cut-off events. For 156631/156631 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 56751 event pairs, 1365 based on Foata normal form. 6/8187 useless extension candidates. Maximal degree in co-relation 71375. Up to 5981 conditions per place. [2023-01-27 20:38:37,875 INFO L137 encePairwiseOnDemand]: 424/435 looper letters, 319 selfloop transitions, 113 changer transitions 15/447 dead transitions. [2023-01-27 20:38:37,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 447 transitions, 10892 flow [2023-01-27 20:38:37,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 20:38:37,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 20:38:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1452 transitions. [2023-01-27 20:38:37,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33379310344827584 [2023-01-27 20:38:37,877 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1452 transitions. [2023-01-27 20:38:37,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1452 transitions. [2023-01-27 20:38:37,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:38:37,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1452 transitions. [2023-01-27 20:38:37,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 145.2) internal successors, (1452), 10 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:37,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:37,880 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 435.0) internal successors, (4785), 11 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:37,880 INFO L175 Difference]: Start difference. First operand has 237 places, 400 transitions, 9166 flow. Second operand 10 states and 1452 transitions. [2023-01-27 20:38:37,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 447 transitions, 10892 flow [2023-01-27 20:38:38,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 447 transitions, 10596 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-01-27 20:38:38,676 INFO L231 Difference]: Finished difference. Result has 235 places, 400 transitions, 9127 flow [2023-01-27 20:38:38,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8872, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9127, PETRI_PLACES=235, PETRI_TRANSITIONS=400} [2023-01-27 20:38:38,677 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 210 predicate places. [2023-01-27 20:38:38,677 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 400 transitions, 9127 flow [2023-01-27 20:38:38,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 140.66666666666666) internal successors, (1688), 12 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:38,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:38:38,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:38:38,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-01-27 20:38:38,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:38,882 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:38:38,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:38:38,882 INFO L85 PathProgramCache]: Analyzing trace with hash 905011214, now seen corresponding path program 19 times [2023-01-27 20:38:38,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:38:38,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921142086] [2023-01-27 20:38:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:38:38,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:38:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:39,365 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 20:38:39,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:38:39,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921142086] [2023-01-27 20:38:39,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921142086] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:39,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671037880] [2023-01-27 20:38:39,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:38:39,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:39,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:38:39,366 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:38:39,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-27 20:38:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-27 20:38:39,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:38:39,593 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 20:38:39,623 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 20:38:39,690 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 20:38:39,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:39,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:38:39,882 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 20:38:39,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:38:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:38:40,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671037880] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:40,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:38:40,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 11] total 30 [2023-01-27 20:38:40,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270235109] [2023-01-27 20:38:40,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:38:40,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 20:38:40,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:38:40,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 20:38:40,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=810, Unknown=16, NotChecked=0, Total=992 [2023-01-27 20:38:40,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 435 [2023-01-27 20:38:40,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 400 transitions, 9127 flow. Second operand has 12 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:40,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:38:40,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 435 [2023-01-27 20:38:40,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:38:40,805 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse21 (* c_thread1Thread1of1ForFork0_~i~0 4))) (let ((.cse5 (+ c_~get2~0.offset .cse21)) (.cse20 (select |c_#memory_int| c_~get2~0.base)) (.cse22 (* c_thread2Thread1of1ForFork1_~i~1 4))) (let ((.cse14 (+ .cse22 c_~get1~0.offset)) (.cse11 (select .cse20 (+ c_~get2~0.offset .cse22))) (.cse10 (select .cse20 .cse5)) (.cse3 (+ c_~get1~0.offset .cse21)) (.cse7 (select .cse20 c_~get2~0.offset))) (and (< c_thread2Thread1of1ForFork1_~i~1 c_~n2~0) (< 0 c_~n1~0) (< 0 c_~n2~0) (forall ((~get1~0.base Int) (v_ArrVal_1852 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1852))) (let ((.cse2 (select .cse6 ~get1~0.base)) (.cse4 (select .cse6 c_~get2~0.base))) (let ((.cse0 (select .cse4 c_~get2~0.offset)) (.cse1 (select .cse2 c_~get1~0.offset))) (or (< .cse0 .cse1) (= .cse0 .cse1) (< (select .cse2 .cse3) (select .cse4 .cse5))))))) (forall ((~get1~0.base Int)) (let ((.cse9 (select |c_#memory_int| ~get1~0.base))) (let ((.cse8 (select .cse9 c_~get1~0.offset))) (or (< .cse7 .cse8) (= .cse8 .cse7) (< (select .cse9 .cse3) .cse10))))) (forall ((~get1~0.base Int)) (let ((.cse13 (select |c_#memory_int| ~get1~0.base))) (let ((.cse12 (select .cse13 .cse14))) (or (< .cse11 .cse12) (= .cse11 .cse12) (< (select .cse13 .cse3) .cse10))))) (forall ((~get1~0.base Int) (v_ArrVal_1852 (Array Int Int))) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1852))) (let ((.cse16 (select .cse17 ~get1~0.base)) (.cse15 (select .cse17 c_~get2~0.base))) (or (<= (select .cse15 .cse5) (select .cse16 .cse3)) (<= (select .cse16 c_~get1~0.offset) (select .cse15 c_~get2~0.offset)))))) (< c_thread2Thread1of1ForFork1_~i~1 c_~n1~0) (forall ((~get1~0.base Int)) (let ((.cse18 (select |c_#memory_int| ~get1~0.base))) (or (<= .cse10 (select .cse18 .cse3)) (<= (select .cse18 .cse14) .cse11)))) (forall ((~get1~0.base Int)) (let ((.cse19 (select |c_#memory_int| ~get1~0.base))) (or (<= .cse10 (select .cse19 .cse3)) (<= (select .cse19 c_~get1~0.offset) .cse7)))))))) is different from false [2023-01-27 20:38:45,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 20:38:48,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 20:38:50,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 20:38:52,182 INFO L130 PetriNetUnfolder]: 5642/9760 cut-off events. [2023-01-27 20:38:52,182 INFO L131 PetriNetUnfolder]: For 193621/193621 co-relation queries the response was YES. [2023-01-27 20:38:52,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86736 conditions, 9760 events. 5642/9760 cut-off events. For 193621/193621 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 70130 event pairs, 1412 based on Foata normal form. 6/9766 useless extension candidates. Maximal degree in co-relation 86237. Up to 5721 conditions per place. [2023-01-27 20:38:52,280 INFO L137 encePairwiseOnDemand]: 419/435 looper letters, 460 selfloop transitions, 117 changer transitions 29/606 dead transitions. [2023-01-27 20:38:52,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 606 transitions, 14724 flow [2023-01-27 20:38:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:38:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:38:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1986 transitions. [2023-01-27 20:38:52,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.304367816091954 [2023-01-27 20:38:52,282 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1986 transitions. [2023-01-27 20:38:52,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1986 transitions. [2023-01-27 20:38:52,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:38:52,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1986 transitions. [2023-01-27 20:38:52,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 132.4) internal successors, (1986), 15 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:52,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:52,286 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:52,286 INFO L175 Difference]: Start difference. First operand has 235 places, 400 transitions, 9127 flow. Second operand 15 states and 1986 transitions. [2023-01-27 20:38:52,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 606 transitions, 14724 flow [2023-01-27 20:38:53,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 606 transitions, 14473 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-01-27 20:38:53,291 INFO L231 Difference]: Finished difference. Result has 243 places, 417 transitions, 9844 flow [2023-01-27 20:38:53,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=8954, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9844, PETRI_PLACES=243, PETRI_TRANSITIONS=417} [2023-01-27 20:38:53,291 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 218 predicate places. [2023-01-27 20:38:53,291 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 417 transitions, 9844 flow [2023-01-27 20:38:53,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:53,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:38:53,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:38:53,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-27 20:38:53,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-01-27 20:38:53,501 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:38:53,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:38:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1687766972, now seen corresponding path program 20 times [2023-01-27 20:38:53,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:38:53,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237353788] [2023-01-27 20:38:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:38:53,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:38:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:54,394 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 20:38:54,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:38:54,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237353788] [2023-01-27 20:38:54,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237353788] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:54,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609267278] [2023-01-27 20:38:54,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:38:54,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:54,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:38:54,397 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:38:54,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-27 20:38:54,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 20:38:54,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:38:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 20:38:54,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:38:54,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:54,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 69 [2023-01-27 20:38:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:38:55,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 20:38:55,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609267278] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:38:55,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 20:38:55,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-01-27 20:38:55,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743322301] [2023-01-27 20:38:55,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:38:55,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:38:55,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:38:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:38:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-01-27 20:38:55,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 435 [2023-01-27 20:38:55,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 417 transitions, 9844 flow. Second operand has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:55,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:38:55,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 435 [2023-01-27 20:38:55,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:38:57,050 INFO L130 PetriNetUnfolder]: 5608/9669 cut-off events. [2023-01-27 20:38:57,050 INFO L131 PetriNetUnfolder]: For 194054/194054 co-relation queries the response was YES. [2023-01-27 20:38:57,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87176 conditions, 9669 events. 5608/9669 cut-off events. For 194054/194054 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 69304 event pairs, 1575 based on Foata normal form. 3/9672 useless extension candidates. Maximal degree in co-relation 86691. Up to 6923 conditions per place. [2023-01-27 20:38:57,174 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 317 selfloop transitions, 106 changer transitions 19/442 dead transitions. [2023-01-27 20:38:57,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 442 transitions, 10973 flow [2023-01-27 20:38:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 20:38:57,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 20:38:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1347 transitions. [2023-01-27 20:38:57,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34406130268199236 [2023-01-27 20:38:57,175 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1347 transitions. [2023-01-27 20:38:57,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1347 transitions. [2023-01-27 20:38:57,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:38:57,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1347 transitions. [2023-01-27 20:38:57,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.66666666666666) internal successors, (1347), 9 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:57,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:57,178 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 435.0) internal successors, (4350), 10 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:57,178 INFO L175 Difference]: Start difference. First operand has 243 places, 417 transitions, 9844 flow. Second operand 9 states and 1347 transitions. [2023-01-27 20:38:57,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 442 transitions, 10973 flow [2023-01-27 20:38:58,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 442 transitions, 10713 flow, removed 34 selfloop flow, removed 11 redundant places. [2023-01-27 20:38:58,395 INFO L231 Difference]: Finished difference. Result has 238 places, 407 transitions, 9563 flow [2023-01-27 20:38:58,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9590, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9563, PETRI_PLACES=238, PETRI_TRANSITIONS=407} [2023-01-27 20:38:58,395 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 213 predicate places. [2023-01-27 20:38:58,395 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 407 transitions, 9563 flow [2023-01-27 20:38:58,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 144.8181818181818) internal successors, (1593), 11 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:38:58,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:38:58,396 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:38:58,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-27 20:38:58,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:58,601 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:38:58,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:38:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash -276521586, now seen corresponding path program 2 times [2023-01-27 20:38:58,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:38:58,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710790667] [2023-01-27 20:38:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:38:58,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:38:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:38:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:38:58,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:38:58,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710790667] [2023-01-27 20:38:58,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710790667] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:38:58,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023507047] [2023-01-27 20:38:58,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:38:58,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:38:58,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:38:58,913 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:38:58,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-27 20:38:59,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:38:59,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:38:59,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:38:59,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:38:59,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:59,664 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 112 treesize of output 77 [2023-01-27 20:38:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:38:59,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:38:59,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:38:59,806 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 158 treesize of output 122 [2023-01-27 20:39:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:39:00,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023507047] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:39:00,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:39:00,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 20:39:00,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937558019] [2023-01-27 20:39:00,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:39:00,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 20:39:00,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:39:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 20:39:00,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 20:39:00,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:39:00,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 407 transitions, 9563 flow. Second operand has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:00,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:39:00,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:39:00,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:39:06,004 INFO L130 PetriNetUnfolder]: 8164/14529 cut-off events. [2023-01-27 20:39:06,004 INFO L131 PetriNetUnfolder]: For 286693/286693 co-relation queries the response was YES. [2023-01-27 20:39:06,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127514 conditions, 14529 events. 8164/14529 cut-off events. For 286693/286693 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 116541 event pairs, 1023 based on Foata normal form. 280/14809 useless extension candidates. Maximal degree in co-relation 126710. Up to 4063 conditions per place. [2023-01-27 20:39:06,570 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1305 selfloop transitions, 421 changer transitions 30/1756 dead transitions. [2023-01-27 20:39:06,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 1756 transitions, 39407 flow [2023-01-27 20:39:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-27 20:39:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-27 20:39:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6437 transitions. [2023-01-27 20:39:06,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3363113897596656 [2023-01-27 20:39:06,574 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6437 transitions. [2023-01-27 20:39:06,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6437 transitions. [2023-01-27 20:39:06,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:39:06,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6437 transitions. [2023-01-27 20:39:06,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 146.29545454545453) internal successors, (6437), 44 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:06,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 435.0) internal successors, (19575), 45 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:06,587 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 435.0) internal successors, (19575), 45 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:06,587 INFO L175 Difference]: Start difference. First operand has 238 places, 407 transitions, 9563 flow. Second operand 44 states and 6437 transitions. [2023-01-27 20:39:06,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 1756 transitions, 39407 flow [2023-01-27 20:39:08,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1756 transitions, 37610 flow, removed 110 selfloop flow, removed 12 redundant places. [2023-01-27 20:39:08,466 INFO L231 Difference]: Finished difference. Result has 278 places, 631 transitions, 16191 flow [2023-01-27 20:39:08,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=9112, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16191, PETRI_PLACES=278, PETRI_TRANSITIONS=631} [2023-01-27 20:39:08,467 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 253 predicate places. [2023-01-27 20:39:08,467 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 631 transitions, 16191 flow [2023-01-27 20:39:08,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:08,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:39:08,467 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:39:08,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-27 20:39:08,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-27 20:39:08,673 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:39:08,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:39:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash 324441220, now seen corresponding path program 3 times [2023-01-27 20:39:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:39:08,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735188315] [2023-01-27 20:39:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:39:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:39:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:39:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:39:08,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:39:08,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735188315] [2023-01-27 20:39:08,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735188315] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:39:08,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322433070] [2023-01-27 20:39:08,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:39:08,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:39:08,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:39:08,912 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:39:08,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-27 20:39:09,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:39:09,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:39:09,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:39:09,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:39:09,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:39:09,398 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 112 treesize of output 77 [2023-01-27 20:39:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:39:09,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:39:09,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:39:09,518 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 158 treesize of output 122 [2023-01-27 20:39:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:39:10,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322433070] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:39:10,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:39:10,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 20:39:10,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027354418] [2023-01-27 20:39:10,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:39:10,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 20:39:10,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:39:10,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 20:39:10,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 20:39:10,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:39:10,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 631 transitions, 16191 flow. Second operand has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:10,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:39:10,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:39:10,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:39:14,874 INFO L130 PetriNetUnfolder]: 8123/14406 cut-off events. [2023-01-27 20:39:14,875 INFO L131 PetriNetUnfolder]: For 355227/355227 co-relation queries the response was YES. [2023-01-27 20:39:15,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135481 conditions, 14406 events. 8123/14406 cut-off events. For 355227/355227 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 114858 event pairs, 1252 based on Foata normal form. 4/14410 useless extension candidates. Maximal degree in co-relation 134529. Up to 4349 conditions per place. [2023-01-27 20:39:15,100 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 944 selfloop transitions, 216 changer transitions 29/1189 dead transitions. [2023-01-27 20:39:15,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1189 transitions, 29041 flow [2023-01-27 20:39:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 20:39:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 20:39:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3780 transitions. [2023-01-27 20:39:15,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33421750663129973 [2023-01-27 20:39:15,121 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3780 transitions. [2023-01-27 20:39:15,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3780 transitions. [2023-01-27 20:39:15,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:39:15,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3780 transitions. [2023-01-27 20:39:15,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 145.3846153846154) internal successors, (3780), 26 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:15,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:15,128 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:15,128 INFO L175 Difference]: Start difference. First operand has 278 places, 631 transitions, 16191 flow. Second operand 26 states and 3780 transitions. [2023-01-27 20:39:15,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1189 transitions, 29041 flow [2023-01-27 20:39:19,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1189 transitions, 27980 flow, removed 232 selfloop flow, removed 18 redundant places. [2023-01-27 20:39:19,333 INFO L231 Difference]: Finished difference. Result has 287 places, 629 transitions, 15609 flow [2023-01-27 20:39:19,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=15184, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15609, PETRI_PLACES=287, PETRI_TRANSITIONS=629} [2023-01-27 20:39:19,334 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 262 predicate places. [2023-01-27 20:39:19,334 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 629 transitions, 15609 flow [2023-01-27 20:39:19,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:19,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:39:19,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:39:19,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-27 20:39:19,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:39:19,540 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:39:19,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:39:19,540 INFO L85 PathProgramCache]: Analyzing trace with hash -305931662, now seen corresponding path program 4 times [2023-01-27 20:39:19,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:39:19,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181167753] [2023-01-27 20:39:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:39:19,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:39:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:39:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:39:19,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:39:19,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181167753] [2023-01-27 20:39:19,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181167753] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:39:19,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279460485] [2023-01-27 20:39:19,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:39:19,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:39:19,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:39:19,755 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:39:19,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-27 20:39:19,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:39:19,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:39:19,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:39:19,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:39:20,135 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-01-27 20:39:20,135 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 58 treesize of output 31 [2023-01-27 20:39:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:39:20,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:39:20,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:39:20,528 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 158 treesize of output 122 [2023-01-27 20:39:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:39:21,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279460485] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:39:21,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:39:21,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 28 [2023-01-27 20:39:21,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976915094] [2023-01-27 20:39:21,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:39:21,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 20:39:21,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:39:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 20:39:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2023-01-27 20:39:21,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 435 [2023-01-27 20:39:21,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 629 transitions, 15609 flow. Second operand has 30 states, 30 states have (on average 134.1) internal successors, (4023), 30 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:21,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:39:21,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 435 [2023-01-27 20:39:21,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:39:28,664 INFO L130 PetriNetUnfolder]: 8685/15489 cut-off events. [2023-01-27 20:39:28,664 INFO L131 PetriNetUnfolder]: For 334624/334624 co-relation queries the response was YES. [2023-01-27 20:39:28,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141301 conditions, 15489 events. 8685/15489 cut-off events. For 334624/334624 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 125799 event pairs, 466 based on Foata normal form. 38/15527 useless extension candidates. Maximal degree in co-relation 140849. Up to 4416 conditions per place. [2023-01-27 20:39:28,890 INFO L137 encePairwiseOnDemand]: 421/435 looper letters, 800 selfloop transitions, 723 changer transitions 26/1549 dead transitions. [2023-01-27 20:39:28,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1549 transitions, 34498 flow [2023-01-27 20:39:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-01-27 20:39:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-01-27 20:39:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 10066 transitions. [2023-01-27 20:39:28,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31698945048023935 [2023-01-27 20:39:28,898 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 10066 transitions. [2023-01-27 20:39:28,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 10066 transitions. [2023-01-27 20:39:28,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:39:28,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 10066 transitions. [2023-01-27 20:39:28,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 137.8904109589041) internal successors, (10066), 73 states have internal predecessors, (10066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:28,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 435.0) internal successors, (32190), 74 states have internal predecessors, (32190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:28,924 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 435.0) internal successors, (32190), 74 states have internal predecessors, (32190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:28,925 INFO L175 Difference]: Start difference. First operand has 287 places, 629 transitions, 15609 flow. Second operand 73 states and 10066 transitions. [2023-01-27 20:39:28,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1549 transitions, 34498 flow [2023-01-27 20:39:32,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1549 transitions, 34062 flow, removed 64 selfloop flow, removed 20 redundant places. [2023-01-27 20:39:32,325 INFO L231 Difference]: Finished difference. Result has 373 places, 992 transitions, 25979 flow [2023-01-27 20:39:32,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=15276, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=25979, PETRI_PLACES=373, PETRI_TRANSITIONS=992} [2023-01-27 20:39:32,326 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 348 predicate places. [2023-01-27 20:39:32,326 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 992 transitions, 25979 flow [2023-01-27 20:39:32,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 134.1) internal successors, (4023), 30 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:32,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:39:32,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:39:32,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-27 20:39:32,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:39:32,531 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:39:32,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:39:32,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1224613424, now seen corresponding path program 5 times [2023-01-27 20:39:32,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:39:32,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002739094] [2023-01-27 20:39:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:39:32,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:39:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:39:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:39:32,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:39:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002739094] [2023-01-27 20:39:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002739094] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:39:32,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497942211] [2023-01-27 20:39:32,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:39:32,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:39:32,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:39:32,785 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:39:32,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-27 20:39:32,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:39:32,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:39:32,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:39:32,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:39:33,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:39:33,293 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 112 treesize of output 77 [2023-01-27 20:39:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:39:33,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:39:33,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:39:33,433 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 158 treesize of output 122 [2023-01-27 20:39:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:39:34,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497942211] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:39:34,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:39:34,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 20:39:34,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35546634] [2023-01-27 20:39:34,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:39:34,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 20:39:34,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:39:34,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 20:39:34,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 20:39:34,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:39:34,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 992 transitions, 25979 flow. Second operand has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:34,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:39:34,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:39:34,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:39:43,512 INFO L130 PetriNetUnfolder]: 10504/18759 cut-off events. [2023-01-27 20:39:43,512 INFO L131 PetriNetUnfolder]: For 554575/554575 co-relation queries the response was YES. [2023-01-27 20:39:43,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190166 conditions, 18759 events. 10504/18759 cut-off events. For 554575/554575 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 155233 event pairs, 1591 based on Foata normal form. 10/18769 useless extension candidates. Maximal degree in co-relation 188916. Up to 5358 conditions per place. [2023-01-27 20:39:43,758 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1469 selfloop transitions, 478 changer transitions 53/2000 dead transitions. [2023-01-27 20:39:43,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 2000 transitions, 51301 flow [2023-01-27 20:39:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 20:39:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 20:39:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5813 transitions. [2023-01-27 20:39:43,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33408045977011497 [2023-01-27 20:39:43,762 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5813 transitions. [2023-01-27 20:39:43,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5813 transitions. [2023-01-27 20:39:43,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:39:43,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5813 transitions. [2023-01-27 20:39:43,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 145.325) internal successors, (5813), 40 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:43,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 435.0) internal successors, (17835), 41 states have internal predecessors, (17835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:43,773 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 435.0) internal successors, (17835), 41 states have internal predecessors, (17835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:43,773 INFO L175 Difference]: Start difference. First operand has 373 places, 992 transitions, 25979 flow. Second operand 40 states and 5813 transitions. [2023-01-27 20:39:43,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 2000 transitions, 51301 flow [2023-01-27 20:39:52,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 2000 transitions, 48729 flow, removed 1066 selfloop flow, removed 21 redundant places. [2023-01-27 20:39:52,069 INFO L231 Difference]: Finished difference. Result has 388 places, 1029 transitions, 26443 flow [2023-01-27 20:39:52,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=24554, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=26443, PETRI_PLACES=388, PETRI_TRANSITIONS=1029} [2023-01-27 20:39:52,070 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 363 predicate places. [2023-01-27 20:39:52,070 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1029 transitions, 26443 flow [2023-01-27 20:39:52,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:52,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:39:52,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:39:52,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-27 20:39:52,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-01-27 20:39:52,276 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:39:52,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:39:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1712007179, now seen corresponding path program 6 times [2023-01-27 20:39:52,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:39:52,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821623626] [2023-01-27 20:39:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:39:52,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:39:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:39:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:39:52,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:39:52,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821623626] [2023-01-27 20:39:52,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821623626] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:39:52,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093163524] [2023-01-27 20:39:52,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:39:52,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:39:52,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:39:52,520 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:39:52,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-27 20:39:52,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 20:39:52,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:39:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-27 20:39:52,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:39:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:39:53,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:39:53,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:39:53,145 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 158 treesize of output 122 [2023-01-27 20:39:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:39:53,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093163524] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:39:53,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:39:53,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-01-27 20:39:53,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846804478] [2023-01-27 20:39:53,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:39:53,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-27 20:39:53,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:39:53,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-27 20:39:53,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2023-01-27 20:39:53,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:39:53,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1029 transitions, 26443 flow. Second operand has 34 states, 34 states have (on average 140.85294117647058) internal successors, (4789), 34 states have internal predecessors, (4789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:39:53,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:39:53,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:39:53,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:40:02,341 INFO L130 PetriNetUnfolder]: 10195/18494 cut-off events. [2023-01-27 20:40:02,341 INFO L131 PetriNetUnfolder]: For 530787/530787 co-relation queries the response was YES. [2023-01-27 20:40:02,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178458 conditions, 18494 events. 10195/18494 cut-off events. For 530787/530787 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 156086 event pairs, 1384 based on Foata normal form. 407/18901 useless extension candidates. Maximal degree in co-relation 178212. Up to 5337 conditions per place. [2023-01-27 20:40:02,650 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1152 selfloop transitions, 532 changer transitions 22/1706 dead transitions. [2023-01-27 20:40:02,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1706 transitions, 42689 flow [2023-01-27 20:40:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 20:40:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 20:40:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4690 transitions. [2023-01-27 20:40:02,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3369252873563218 [2023-01-27 20:40:02,654 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4690 transitions. [2023-01-27 20:40:02,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4690 transitions. [2023-01-27 20:40:02,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:40:02,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4690 transitions. [2023-01-27 20:40:02,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 146.5625) internal successors, (4690), 32 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:02,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 435.0) internal successors, (14355), 33 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:02,665 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 435.0) internal successors, (14355), 33 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:02,665 INFO L175 Difference]: Start difference. First operand has 388 places, 1029 transitions, 26443 flow. Second operand 32 states and 4690 transitions. [2023-01-27 20:40:02,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1706 transitions, 42689 flow [2023-01-27 20:40:09,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1706 transitions, 41921 flow, removed 48 selfloop flow, removed 30 redundant places. [2023-01-27 20:40:09,471 INFO L231 Difference]: Finished difference. Result has 393 places, 1163 transitions, 31136 flow [2023-01-27 20:40:09,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=25731, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=31136, PETRI_PLACES=393, PETRI_TRANSITIONS=1163} [2023-01-27 20:40:09,473 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 368 predicate places. [2023-01-27 20:40:09,473 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1163 transitions, 31136 flow [2023-01-27 20:40:09,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 140.85294117647058) internal successors, (4789), 34 states have internal predecessors, (4789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:09,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:40:09,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:40:09,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-27 20:40:09,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-27 20:40:09,679 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:40:09,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:40:09,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1631064705, now seen corresponding path program 7 times [2023-01-27 20:40:09,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:40:09,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549781930] [2023-01-27 20:40:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:40:09,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:40:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:40:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:40:10,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:40:10,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549781930] [2023-01-27 20:40:10,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549781930] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:40:10,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468381520] [2023-01-27 20:40:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:40:10,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:40:10,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:40:10,024 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:40:10,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-27 20:40:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:40:10,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:40:10,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:40:10,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:40:10,445 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 112 treesize of output 77 [2023-01-27 20:40:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:40:10,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:40:10,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:40:10,552 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 158 treesize of output 122 [2023-01-27 20:40:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:40:11,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468381520] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:40:11,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:40:11,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-27 20:40:11,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413203331] [2023-01-27 20:40:11,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:40:11,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:40:11,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:40:11,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:40:11,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:40:11,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:40:11,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1163 transitions, 31136 flow. Second operand has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:40:11,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:40:11,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:40:11,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:40:19,925 INFO L130 PetriNetUnfolder]: 10162/18437 cut-off events. [2023-01-27 20:40:19,925 INFO L131 PetriNetUnfolder]: For 587548/587548 co-relation queries the response was YES. [2023-01-27 20:40:20,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186719 conditions, 18437 events. 10162/18437 cut-off events. For 587548/587548 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 155306 event pairs, 1678 based on Foata normal form. 8/18445 useless extension candidates. Maximal degree in co-relation 185812. Up to 5331 conditions per place. [2023-01-27 20:40:20,247 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1125 selfloop transitions, 331 changer transitions 23/1479 dead transitions. [2023-01-27 20:40:20,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1479 transitions, 39698 flow [2023-01-27 20:40:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 20:40:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 20:40:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3063 transitions. [2023-01-27 20:40:20,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33530377668308703 [2023-01-27 20:40:20,250 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3063 transitions. [2023-01-27 20:40:20,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3063 transitions. [2023-01-27 20:40:20,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:40:20,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3063 transitions. [2023-01-27 20:40:20,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 145.85714285714286) internal successors, (3063), 21 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:20,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 435.0) internal successors, (9570), 22 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:20,257 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 435.0) internal successors, (9570), 22 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:20,257 INFO L175 Difference]: Start difference. First operand has 393 places, 1163 transitions, 31136 flow. Second operand 21 states and 3063 transitions. [2023-01-27 20:40:20,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1479 transitions, 39698 flow [2023-01-27 20:40:30,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1479 transitions, 37398 flow, removed 634 selfloop flow, removed 31 redundant places. [2023-01-27 20:40:30,045 INFO L231 Difference]: Finished difference. Result has 383 places, 1159 transitions, 29503 flow [2023-01-27 20:40:30,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=28898, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=29503, PETRI_PLACES=383, PETRI_TRANSITIONS=1159} [2023-01-27 20:40:30,046 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 358 predicate places. [2023-01-27 20:40:30,046 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 1159 transitions, 29503 flow [2023-01-27 20:40:30,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:40:30,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:40:30,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:40:30,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-27 20:40:30,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-01-27 20:40:30,256 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:40:30,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:40:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2033529709, now seen corresponding path program 8 times [2023-01-27 20:40:30,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:40:30,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6801458] [2023-01-27 20:40:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:40:30,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:40:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:40:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:40:30,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:40:30,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6801458] [2023-01-27 20:40:30,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6801458] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:40:30,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599902531] [2023-01-27 20:40:30,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:40:30,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:40:30,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:40:30,493 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:40:30,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-27 20:40:30,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:40:30,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:40:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:40:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:40:31,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:40:31,078 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 108 treesize of output 73 [2023-01-27 20:40:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:40:31,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:40:31,314 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:40:31,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 122 [2023-01-27 20:40:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:40:31,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599902531] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:40:31,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:40:31,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-27 20:40:31,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717475444] [2023-01-27 20:40:31,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:40:31,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:40:31,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:40:31,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:40:31,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:40:31,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:40:31,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1159 transitions, 29503 flow. Second operand has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:40:31,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:40:31,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:40:31,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:40:40,092 INFO L130 PetriNetUnfolder]: 10090/18251 cut-off events. [2023-01-27 20:40:40,092 INFO L131 PetriNetUnfolder]: For 494500/494500 co-relation queries the response was YES. [2023-01-27 20:40:40,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180564 conditions, 18251 events. 10090/18251 cut-off events. For 494500/494500 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 152694 event pairs, 1380 based on Foata normal form. 10/18261 useless extension candidates. Maximal degree in co-relation 180333. Up to 5307 conditions per place. [2023-01-27 20:40:40,331 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1022 selfloop transitions, 524 changer transitions 9/1555 dead transitions. [2023-01-27 20:40:40,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1555 transitions, 39168 flow [2023-01-27 20:40:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 20:40:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 20:40:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3800 transitions. [2023-01-27 20:40:40,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3359858532272325 [2023-01-27 20:40:40,333 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3800 transitions. [2023-01-27 20:40:40,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3800 transitions. [2023-01-27 20:40:40,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:40:40,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3800 transitions. [2023-01-27 20:40:40,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 146.15384615384616) internal successors, (3800), 26 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:40,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:40,341 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:40,341 INFO L175 Difference]: Start difference. First operand has 383 places, 1159 transitions, 29503 flow. Second operand 26 states and 3800 transitions. [2023-01-27 20:40:40,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1555 transitions, 39168 flow [2023-01-27 20:40:46,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1555 transitions, 38603 flow, removed 38 selfloop flow, removed 20 redundant places. [2023-01-27 20:40:46,659 INFO L231 Difference]: Finished difference. Result has 387 places, 1158 transitions, 29988 flow [2023-01-27 20:40:46,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=28948, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=29988, PETRI_PLACES=387, PETRI_TRANSITIONS=1158} [2023-01-27 20:40:46,659 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 362 predicate places. [2023-01-27 20:40:46,659 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1158 transitions, 29988 flow [2023-01-27 20:40:46,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:40:46,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:40:46,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:40:46,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-27 20:40:46,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:40:46,865 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:40:46,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:40:46,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1065886537, now seen corresponding path program 1 times [2023-01-27 20:40:46,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:40:46,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536723005] [2023-01-27 20:40:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:40:46,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:40:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:40:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:40:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:40:47,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536723005] [2023-01-27 20:40:47,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536723005] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:40:47,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:40:47,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-01-27 20:40:47,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899337904] [2023-01-27 20:40:47,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:40:47,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 20:40:47,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:40:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 20:40:47,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-01-27 20:40:47,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 435 [2023-01-27 20:40:47,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1158 transitions, 29988 flow. Second operand has 10 states, 10 states have (on average 159.1) internal successors, (1591), 10 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:47,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:40:47,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 435 [2023-01-27 20:40:47,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:40:54,199 INFO L130 PetriNetUnfolder]: 10190/18633 cut-off events. [2023-01-27 20:40:54,199 INFO L131 PetriNetUnfolder]: For 514799/514799 co-relation queries the response was YES. [2023-01-27 20:40:54,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186832 conditions, 18633 events. 10190/18633 cut-off events. For 514799/514799 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 158804 event pairs, 3116 based on Foata normal form. 212/18845 useless extension candidates. Maximal degree in co-relation 186148. Up to 13331 conditions per place. [2023-01-27 20:40:54,477 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 1009 selfloop transitions, 186 changer transitions 80/1275 dead transitions. [2023-01-27 20:40:54,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1275 transitions, 35293 flow [2023-01-27 20:40:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:40:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:40:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1163 transitions. [2023-01-27 20:40:54,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819376026272578 [2023-01-27 20:40:54,478 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1163 transitions. [2023-01-27 20:40:54,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1163 transitions. [2023-01-27 20:40:54,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:40:54,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1163 transitions. [2023-01-27 20:40:54,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.14285714285714) internal successors, (1163), 7 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:54,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:54,481 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:40:54,481 INFO L175 Difference]: Start difference. First operand has 387 places, 1158 transitions, 29988 flow. Second operand 7 states and 1163 transitions. [2023-01-27 20:40:54,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1275 transitions, 35293 flow [2023-01-27 20:41:00,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1275 transitions, 34190 flow, removed 6 selfloop flow, removed 24 redundant places. [2023-01-27 20:41:00,547 INFO L231 Difference]: Finished difference. Result has 369 places, 1086 transitions, 26906 flow [2023-01-27 20:41:00,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=28242, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=946, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26906, PETRI_PLACES=369, PETRI_TRANSITIONS=1086} [2023-01-27 20:41:00,548 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 344 predicate places. [2023-01-27 20:41:00,548 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1086 transitions, 26906 flow [2023-01-27 20:41:00,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 159.1) internal successors, (1591), 10 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:00,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:41:00,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:41:00,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2023-01-27 20:41:00,548 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:41:00,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:41:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1573926615, now seen corresponding path program 2 times [2023-01-27 20:41:00,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:41:00,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143002992] [2023-01-27 20:41:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:41:00,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:41:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:41:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:41:00,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:41:00,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143002992] [2023-01-27 20:41:00,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143002992] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:41:00,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:41:00,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:41:00,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306289968] [2023-01-27 20:41:00,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:41:00,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:41:00,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:41:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:41:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:41:00,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 435 [2023-01-27 20:41:00,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1086 transitions, 26906 flow. Second operand has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:00,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:41:00,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 435 [2023-01-27 20:41:00,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:41:07,029 INFO L130 PetriNetUnfolder]: 10066/18293 cut-off events. [2023-01-27 20:41:07,030 INFO L131 PetriNetUnfolder]: For 486493/486493 co-relation queries the response was YES. [2023-01-27 20:41:07,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181998 conditions, 18293 events. 10066/18293 cut-off events. For 486493/486493 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 154092 event pairs, 2960 based on Foata normal form. 162/18455 useless extension candidates. Maximal degree in co-relation 181878. Up to 13397 conditions per place. [2023-01-27 20:41:07,287 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 820 selfloop transitions, 350 changer transitions 2/1172 dead transitions. [2023-01-27 20:41:07,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1172 transitions, 31124 flow [2023-01-27 20:41:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:41:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:41:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1163 transitions. [2023-01-27 20:41:07,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819376026272578 [2023-01-27 20:41:07,288 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1163 transitions. [2023-01-27 20:41:07,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1163 transitions. [2023-01-27 20:41:07,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:41:07,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1163 transitions. [2023-01-27 20:41:07,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.14285714285714) internal successors, (1163), 7 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:07,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:07,291 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:07,291 INFO L175 Difference]: Start difference. First operand has 369 places, 1086 transitions, 26906 flow. Second operand 7 states and 1163 transitions. [2023-01-27 20:41:07,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1172 transitions, 31124 flow [2023-01-27 20:41:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1172 transitions, 30582 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-01-27 20:41:13,488 INFO L231 Difference]: Finished difference. Result has 362 places, 1108 transitions, 28065 flow [2023-01-27 20:41:13,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=26329, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=28065, PETRI_PLACES=362, PETRI_TRANSITIONS=1108} [2023-01-27 20:41:13,490 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 337 predicate places. [2023-01-27 20:41:13,491 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1108 transitions, 28065 flow [2023-01-27 20:41:13,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:13,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:41:13,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:41:13,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2023-01-27 20:41:13,493 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:41:13,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:41:13,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1337131555, now seen corresponding path program 3 times [2023-01-27 20:41:13,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:41:13,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197100970] [2023-01-27 20:41:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:41:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:41:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:41:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:41:13,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:41:13,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197100970] [2023-01-27 20:41:13,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197100970] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:41:13,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:41:13,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:41:13,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723295540] [2023-01-27 20:41:13,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:41:13,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:41:13,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:41:13,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:41:13,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:41:13,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 435 [2023-01-27 20:41:13,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1108 transitions, 28065 flow. Second operand has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:13,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:41:13,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 435 [2023-01-27 20:41:13,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:41:20,303 INFO L130 PetriNetUnfolder]: 9846/18009 cut-off events. [2023-01-27 20:41:20,303 INFO L131 PetriNetUnfolder]: For 490853/490853 co-relation queries the response was YES. [2023-01-27 20:41:20,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178947 conditions, 18009 events. 9846/18009 cut-off events. For 490853/490853 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 152569 event pairs, 3197 based on Foata normal form. 112/18121 useless extension candidates. Maximal degree in co-relation 178828. Up to 13397 conditions per place. [2023-01-27 20:41:20,549 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 886 selfloop transitions, 249 changer transitions 24/1159 dead transitions. [2023-01-27 20:41:20,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1159 transitions, 31430 flow [2023-01-27 20:41:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:41:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:41:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1155 transitions. [2023-01-27 20:41:20,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2023-01-27 20:41:20,551 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1155 transitions. [2023-01-27 20:41:20,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1155 transitions. [2023-01-27 20:41:20,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:41:20,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1155 transitions. [2023-01-27 20:41:20,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:20,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:20,553 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:20,553 INFO L175 Difference]: Start difference. First operand has 362 places, 1108 transitions, 28065 flow. Second operand 7 states and 1155 transitions. [2023-01-27 20:41:20,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1159 transitions, 31430 flow [2023-01-27 20:41:26,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1159 transitions, 30922 flow, removed 58 selfloop flow, removed 7 redundant places. [2023-01-27 20:41:26,223 INFO L231 Difference]: Finished difference. Result has 362 places, 1083 transitions, 27361 flow [2023-01-27 20:41:26,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=27197, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=27361, PETRI_PLACES=362, PETRI_TRANSITIONS=1083} [2023-01-27 20:41:26,223 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 337 predicate places. [2023-01-27 20:41:26,223 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1083 transitions, 27361 flow [2023-01-27 20:41:26,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:26,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:41:26,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:41:26,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2023-01-27 20:41:26,224 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:41:26,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:41:26,224 INFO L85 PathProgramCache]: Analyzing trace with hash -241174747, now seen corresponding path program 4 times [2023-01-27 20:41:26,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:41:26,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025662062] [2023-01-27 20:41:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:41:26,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:41:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:41:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:41:26,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:41:26,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025662062] [2023-01-27 20:41:26,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025662062] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:41:26,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490367298] [2023-01-27 20:41:26,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:41:26,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:41:26,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:41:26,384 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:41:26,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-27 20:41:26,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:41:26,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:41:26,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 20:41:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:41:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:41:26,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:41:26,645 INFO L321 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-01-27 20:41:26,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-01-27 20:41:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:41:26,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490367298] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:41:26,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:41:26,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2023-01-27 20:41:26,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366152060] [2023-01-27 20:41:26,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:41:26,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 20:41:26,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:41:26,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 20:41:26,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-01-27 20:41:26,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 435 [2023-01-27 20:41:26,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1083 transitions, 27361 flow. Second operand has 16 states, 16 states have (on average 159.5625) internal successors, (2553), 16 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:26,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:41:26,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 435 [2023-01-27 20:41:26,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:41:33,327 INFO L130 PetriNetUnfolder]: 9682/17655 cut-off events. [2023-01-27 20:41:33,328 INFO L131 PetriNetUnfolder]: For 483459/483459 co-relation queries the response was YES. [2023-01-27 20:41:33,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176031 conditions, 17655 events. 9682/17655 cut-off events. For 483459/483459 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 148586 event pairs, 3183 based on Foata normal form. 90/17745 useless extension candidates. Maximal degree in co-relation 175915. Up to 13451 conditions per place. [2023-01-27 20:41:33,529 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 899 selfloop transitions, 265 changer transitions 0/1164 dead transitions. [2023-01-27 20:41:33,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1164 transitions, 31633 flow [2023-01-27 20:41:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:41:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:41:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1153 transitions. [2023-01-27 20:41:33,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3786535303776683 [2023-01-27 20:41:33,531 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1153 transitions. [2023-01-27 20:41:33,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1153 transitions. [2023-01-27 20:41:33,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:41:33,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1153 transitions. [2023-01-27 20:41:33,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 164.71428571428572) internal successors, (1153), 7 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:33,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:33,533 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:33,533 INFO L175 Difference]: Start difference. First operand has 362 places, 1083 transitions, 27361 flow. Second operand 7 states and 1153 transitions. [2023-01-27 20:41:33,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1164 transitions, 31633 flow [2023-01-27 20:41:38,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1164 transitions, 31264 flow, removed 29 selfloop flow, removed 5 redundant places. [2023-01-27 20:41:38,940 INFO L231 Difference]: Finished difference. Result has 362 places, 1099 transitions, 28074 flow [2023-01-27 20:41:38,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=27008, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=28074, PETRI_PLACES=362, PETRI_TRANSITIONS=1099} [2023-01-27 20:41:38,941 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 337 predicate places. [2023-01-27 20:41:38,941 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1099 transitions, 28074 flow [2023-01-27 20:41:38,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 159.5625) internal successors, (2553), 16 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:38,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:41:38,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:41:38,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-27 20:41:39,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-01-27 20:41:39,153 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:41:39,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:41:39,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1778165475, now seen corresponding path program 5 times [2023-01-27 20:41:39,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:41:39,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303660476] [2023-01-27 20:41:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:41:39,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:41:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:41:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:41:39,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:41:39,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303660476] [2023-01-27 20:41:39,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303660476] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:41:39,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109012425] [2023-01-27 20:41:39,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:41:39,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:41:39,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:41:39,341 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:41:39,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-27 20:41:39,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:41:39,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:41:39,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:41:39,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:41:39,546 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 20:41:39,569 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 20:41:39,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 20:41:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:41:39,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:41:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:41:39,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109012425] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 20:41:39,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 20:41:39,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 10] total 18 [2023-01-27 20:41:39,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798926186] [2023-01-27 20:41:39,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:41:39,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 20:41:39,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:41:39,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 20:41:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-01-27 20:41:39,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 435 [2023-01-27 20:41:39,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1099 transitions, 28074 flow. Second operand has 6 states, 6 states have (on average 166.5) internal successors, (999), 6 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:39,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:41:39,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 435 [2023-01-27 20:41:39,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:41:46,233 INFO L130 PetriNetUnfolder]: 9628/17601 cut-off events. [2023-01-27 20:41:46,233 INFO L131 PetriNetUnfolder]: For 484730/484730 co-relation queries the response was YES. [2023-01-27 20:41:46,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175470 conditions, 17601 events. 9628/17601 cut-off events. For 484730/484730 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 148264 event pairs, 3305 based on Foata normal form. 54/17655 useless extension candidates. Maximal degree in co-relation 175355. Up to 15338 conditions per place. [2023-01-27 20:41:46,561 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 973 selfloop transitions, 201 changer transitions 0/1174 dead transitions. [2023-01-27 20:41:46,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1174 transitions, 31815 flow [2023-01-27 20:41:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 20:41:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 20:41:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1039 transitions. [2023-01-27 20:41:46,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39808429118773947 [2023-01-27 20:41:46,562 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1039 transitions. [2023-01-27 20:41:46,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1039 transitions. [2023-01-27 20:41:46,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:41:46,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1039 transitions. [2023-01-27 20:41:46,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.16666666666666) internal successors, (1039), 6 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:46,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 435.0) internal successors, (3045), 7 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:46,564 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 435.0) internal successors, (3045), 7 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:46,564 INFO L175 Difference]: Start difference. First operand has 362 places, 1099 transitions, 28074 flow. Second operand 6 states and 1039 transitions. [2023-01-27 20:41:46,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1174 transitions, 31815 flow [2023-01-27 20:41:51,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1174 transitions, 30970 flow, removed 48 selfloop flow, removed 6 redundant places. [2023-01-27 20:41:51,955 INFO L231 Difference]: Finished difference. Result has 362 places, 1099 transitions, 27674 flow [2023-01-27 20:41:51,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=27229, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=898, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=27674, PETRI_PLACES=362, PETRI_TRANSITIONS=1099} [2023-01-27 20:41:51,956 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 337 predicate places. [2023-01-27 20:41:51,956 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1099 transitions, 27674 flow [2023-01-27 20:41:51,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.5) internal successors, (999), 6 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:51,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:41:51,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:41:51,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-01-27 20:41:52,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-01-27 20:41:52,157 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:41:52,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:41:52,157 INFO L85 PathProgramCache]: Analyzing trace with hash -199859173, now seen corresponding path program 6 times [2023-01-27 20:41:52,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:41:52,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061150108] [2023-01-27 20:41:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:41:52,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:41:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:41:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:41:52,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:41:52,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061150108] [2023-01-27 20:41:52,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061150108] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:41:52,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:41:52,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:41:52,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89434952] [2023-01-27 20:41:52,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:41:52,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:41:52,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:41:52,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:41:52,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:41:52,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 435 [2023-01-27 20:41:52,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1099 transitions, 27674 flow. Second operand has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:52,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:41:52,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 435 [2023-01-27 20:41:52,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:41:58,314 INFO L130 PetriNetUnfolder]: 9302/17059 cut-off events. [2023-01-27 20:41:58,314 INFO L131 PetriNetUnfolder]: For 465084/465084 co-relation queries the response was YES. [2023-01-27 20:41:58,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168736 conditions, 17059 events. 9302/17059 cut-off events. For 465084/465084 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 143557 event pairs, 3138 based on Foata normal form. 146/17205 useless extension candidates. Maximal degree in co-relation 168620. Up to 13451 conditions per place. [2023-01-27 20:41:58,764 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 740 selfloop transitions, 330 changer transitions 25/1095 dead transitions. [2023-01-27 20:41:58,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1095 transitions, 29451 flow [2023-01-27 20:41:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:41:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:41:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1156 transitions. [2023-01-27 20:41:58,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37963875205254516 [2023-01-27 20:41:58,765 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1156 transitions. [2023-01-27 20:41:58,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1156 transitions. [2023-01-27 20:41:58,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:41:58,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1156 transitions. [2023-01-27 20:41:58,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 165.14285714285714) internal successors, (1156), 7 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:58,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:58,767 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:41:58,767 INFO L175 Difference]: Start difference. First operand has 362 places, 1099 transitions, 27674 flow. Second operand 7 states and 1156 transitions. [2023-01-27 20:41:58,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1095 transitions, 29451 flow [2023-01-27 20:42:04,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1095 transitions, 28997 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-01-27 20:42:04,133 INFO L231 Difference]: Finished difference. Result has 365 places, 1037 transitions, 26187 flow [2023-01-27 20:42:04,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=26182, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26187, PETRI_PLACES=365, PETRI_TRANSITIONS=1037} [2023-01-27 20:42:04,134 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 340 predicate places. [2023-01-27 20:42:04,134 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1037 transitions, 26187 flow [2023-01-27 20:42:04,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:04,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:42:04,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:42:04,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2023-01-27 20:42:04,135 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:42:04,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:42:04,135 INFO L85 PathProgramCache]: Analyzing trace with hash -64579725, now seen corresponding path program 7 times [2023-01-27 20:42:04,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:42:04,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103150371] [2023-01-27 20:42:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:42:04,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:42:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:42:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:42:04,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:42:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103150371] [2023-01-27 20:42:04,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103150371] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:42:04,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:42:04,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:42:04,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290294606] [2023-01-27 20:42:04,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:42:04,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:42:04,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:42:04,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:42:04,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:42:04,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 435 [2023-01-27 20:42:04,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1037 transitions, 26187 flow. Second operand has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:04,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:42:04,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 435 [2023-01-27 20:42:04,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:42:10,299 INFO L130 PetriNetUnfolder]: 9362/17059 cut-off events. [2023-01-27 20:42:10,299 INFO L131 PetriNetUnfolder]: For 461214/461214 co-relation queries the response was YES. [2023-01-27 20:42:10,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170163 conditions, 17059 events. 9362/17059 cut-off events. For 461214/461214 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 141948 event pairs, 612 based on Foata normal form. 58/17117 useless extension candidates. Maximal degree in co-relation 170047. Up to 10837 conditions per place. [2023-01-27 20:42:10,548 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 731 selfloop transitions, 422 changer transitions 19/1172 dead transitions. [2023-01-27 20:42:10,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1172 transitions, 31797 flow [2023-01-27 20:42:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:42:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:42:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1153 transitions. [2023-01-27 20:42:10,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3786535303776683 [2023-01-27 20:42:10,558 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1153 transitions. [2023-01-27 20:42:10,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1153 transitions. [2023-01-27 20:42:10,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:42:10,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1153 transitions. [2023-01-27 20:42:10,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 164.71428571428572) internal successors, (1153), 7 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:10,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:10,560 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:10,560 INFO L175 Difference]: Start difference. First operand has 365 places, 1037 transitions, 26187 flow. Second operand 7 states and 1153 transitions. [2023-01-27 20:42:10,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1172 transitions, 31797 flow [2023-01-27 20:42:16,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1172 transitions, 30915 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-01-27 20:42:16,464 INFO L231 Difference]: Finished difference. Result has 360 places, 1056 transitions, 26892 flow [2023-01-27 20:42:16,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=25345, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26892, PETRI_PLACES=360, PETRI_TRANSITIONS=1056} [2023-01-27 20:42:16,465 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 335 predicate places. [2023-01-27 20:42:16,465 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1056 transitions, 26892 flow [2023-01-27 20:42:16,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:16,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:42:16,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:42:16,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2023-01-27 20:42:16,466 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:42:16,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:42:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1588037673, now seen corresponding path program 8 times [2023-01-27 20:42:16,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:42:16,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437180769] [2023-01-27 20:42:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:42:16,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:42:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:42:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:42:16,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:42:16,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437180769] [2023-01-27 20:42:16,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437180769] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:42:16,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:42:16,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:42:16,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824786822] [2023-01-27 20:42:16,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:42:16,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:42:16,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:42:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:42:16,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:42:16,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 435 [2023-01-27 20:42:16,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1056 transitions, 26892 flow. Second operand has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:16,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:42:16,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 435 [2023-01-27 20:42:16,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:42:22,499 INFO L130 PetriNetUnfolder]: 9266/16871 cut-off events. [2023-01-27 20:42:22,499 INFO L131 PetriNetUnfolder]: For 490342/490342 co-relation queries the response was YES. [2023-01-27 20:42:22,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170969 conditions, 16871 events. 9266/16871 cut-off events. For 490342/490342 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 140272 event pairs, 2300 based on Foata normal form. 52/16923 useless extension candidates. Maximal degree in co-relation 170852. Up to 12613 conditions per place. [2023-01-27 20:42:22,968 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 662 selfloop transitions, 419 changer transitions 0/1081 dead transitions. [2023-01-27 20:42:22,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1081 transitions, 29459 flow [2023-01-27 20:42:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:42:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:42:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1144 transitions. [2023-01-27 20:42:22,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3756978653530378 [2023-01-27 20:42:22,970 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1144 transitions. [2023-01-27 20:42:22,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1144 transitions. [2023-01-27 20:42:22,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:42:22,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1144 transitions. [2023-01-27 20:42:22,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 163.42857142857142) internal successors, (1144), 7 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:22,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:22,973 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:22,973 INFO L175 Difference]: Start difference. First operand has 360 places, 1056 transitions, 26892 flow. Second operand 7 states and 1144 transitions. [2023-01-27 20:42:22,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1081 transitions, 29459 flow [2023-01-27 20:42:28,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1081 transitions, 28453 flow, removed 52 selfloop flow, removed 5 redundant places. [2023-01-27 20:42:28,203 INFO L231 Difference]: Finished difference. Result has 360 places, 1046 transitions, 26575 flow [2023-01-27 20:42:28,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=25460, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26575, PETRI_PLACES=360, PETRI_TRANSITIONS=1046} [2023-01-27 20:42:28,204 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 335 predicate places. [2023-01-27 20:42:28,204 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1046 transitions, 26575 flow [2023-01-27 20:42:28,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:28,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:42:28,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:42:28,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2023-01-27 20:42:28,205 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:42:28,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:42:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1820779107, now seen corresponding path program 9 times [2023-01-27 20:42:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:42:28,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551805000] [2023-01-27 20:42:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:42:28,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:42:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:42:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:42:28,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:42:28,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551805000] [2023-01-27 20:42:28,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551805000] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:42:28,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:42:28,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:42:28,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895810632] [2023-01-27 20:42:28,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:42:28,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:42:28,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:42:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:42:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:42:28,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 435 [2023-01-27 20:42:28,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1046 transitions, 26575 flow. Second operand has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:28,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:42:28,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 435 [2023-01-27 20:42:28,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:42:34,215 INFO L130 PetriNetUnfolder]: 9078/16555 cut-off events. [2023-01-27 20:42:34,215 INFO L131 PetriNetUnfolder]: For 471590/471590 co-relation queries the response was YES. [2023-01-27 20:42:34,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167603 conditions, 16555 events. 9078/16555 cut-off events. For 471590/471590 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 137457 event pairs, 2212 based on Foata normal form. 58/16613 useless extension candidates. Maximal degree in co-relation 167487. Up to 12123 conditions per place. [2023-01-27 20:42:34,429 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 668 selfloop transitions, 435 changer transitions 8/1111 dead transitions. [2023-01-27 20:42:34,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1111 transitions, 30250 flow [2023-01-27 20:42:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:42:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:42:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1147 transitions. [2023-01-27 20:42:34,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3766830870279146 [2023-01-27 20:42:34,431 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1147 transitions. [2023-01-27 20:42:34,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1147 transitions. [2023-01-27 20:42:34,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:42:34,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1147 transitions. [2023-01-27 20:42:34,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 163.85714285714286) internal successors, (1147), 7 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:34,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:34,434 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:34,434 INFO L175 Difference]: Start difference. First operand has 360 places, 1046 transitions, 26575 flow. Second operand 7 states and 1147 transitions. [2023-01-27 20:42:34,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1111 transitions, 30250 flow [2023-01-27 20:42:39,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1111 transitions, 29314 flow, removed 41 selfloop flow, removed 6 redundant places. [2023-01-27 20:42:39,767 INFO L231 Difference]: Finished difference. Result has 362 places, 1040 transitions, 26452 flow [2023-01-27 20:42:39,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=25467, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26452, PETRI_PLACES=362, PETRI_TRANSITIONS=1040} [2023-01-27 20:42:39,769 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 337 predicate places. [2023-01-27 20:42:39,769 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1040 transitions, 26452 flow [2023-01-27 20:42:39,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:39,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:42:39,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:42:39,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2023-01-27 20:42:39,770 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:42:39,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:42:39,770 INFO L85 PathProgramCache]: Analyzing trace with hash -696531633, now seen corresponding path program 10 times [2023-01-27 20:42:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:42:39,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702657069] [2023-01-27 20:42:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:42:39,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:42:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:42:40,101 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 20:42:40,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:42:40,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702657069] [2023-01-27 20:42:40,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702657069] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:42:40,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223585295] [2023-01-27 20:42:40,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:42:40,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:42:40,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:42:40,109 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:42:40,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-27 20:42:40,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:42:40,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:42:40,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 20:42:40,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:42:40,316 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 20:42:40,340 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 20:42:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:42:40,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:42:40,424 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 20:42:40,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2023-01-27 20:42:40,459 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 20:42:40,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:42:40,486 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2439 (Array Int Int))) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2439))) (= (select (select .cse0 c_~get1~0.base) c_~get1~0.offset) (select (select .cse0 c_~get2~0.base) c_~get2~0.offset))))) is different from false [2023-01-27 20:42:40,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:42:40,603 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 54 [2023-01-27 20:42:40,611 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-01-27 20:42:40,611 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 664 treesize of output 591 [2023-01-27 20:42:40,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:42:40,631 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 312 treesize of output 296 [2023-01-27 20:42:40,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:42:40,639 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 246 treesize of output 223 [2023-01-27 20:42:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:42:40,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223585295] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:42:40,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:42:40,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-01-27 20:42:40,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996156912] [2023-01-27 20:42:40,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:42:40,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 20:42:40,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:42:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 20:42:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=632, Unknown=18, NotChecked=52, Total=812 [2023-01-27 20:42:40,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 435 [2023-01-27 20:42:40,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1040 transitions, 26452 flow. Second operand has 29 states, 29 states have (on average 127.6896551724138) internal successors, (3703), 29 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:40,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:42:40,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 435 [2023-01-27 20:42:40,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:42:47,380 INFO L130 PetriNetUnfolder]: 8970/16413 cut-off events. [2023-01-27 20:42:47,380 INFO L131 PetriNetUnfolder]: For 473141/473141 co-relation queries the response was YES. [2023-01-27 20:42:47,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166073 conditions, 16413 events. 8970/16413 cut-off events. For 473141/473141 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 136907 event pairs, 2905 based on Foata normal form. 104/16517 useless extension candidates. Maximal degree in co-relation 165955. Up to 7368 conditions per place. [2023-01-27 20:42:47,828 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 865 selfloop transitions, 262 changer transitions 56/1183 dead transitions. [2023-01-27 20:42:47,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1183 transitions, 31245 flow [2023-01-27 20:42:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 20:42:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 20:42:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2130 transitions. [2023-01-27 20:42:47,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30603448275862066 [2023-01-27 20:42:47,830 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2130 transitions. [2023-01-27 20:42:47,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2130 transitions. [2023-01-27 20:42:47,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:42:47,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2130 transitions. [2023-01-27 20:42:47,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 133.125) internal successors, (2130), 16 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:47,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 435.0) internal successors, (7395), 17 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:47,835 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 435.0) internal successors, (7395), 17 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:47,835 INFO L175 Difference]: Start difference. First operand has 362 places, 1040 transitions, 26452 flow. Second operand 16 states and 2130 transitions. [2023-01-27 20:42:47,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1183 transitions, 31245 flow [2023-01-27 20:42:53,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1183 transitions, 30196 flow, removed 54 selfloop flow, removed 7 redundant places. [2023-01-27 20:42:53,358 INFO L231 Difference]: Finished difference. Result has 372 places, 1010 transitions, 25101 flow [2023-01-27 20:42:53,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=25437, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=25101, PETRI_PLACES=372, PETRI_TRANSITIONS=1010} [2023-01-27 20:42:53,359 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 347 predicate places. [2023-01-27 20:42:53,359 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 1010 transitions, 25101 flow [2023-01-27 20:42:53,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 127.6896551724138) internal successors, (3703), 29 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:53,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:42:53,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:42:53,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-27 20:42:53,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:42:53,565 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:42:53,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:42:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1342237503, now seen corresponding path program 11 times [2023-01-27 20:42:53,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:42:53,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037401812] [2023-01-27 20:42:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:42:53,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:42:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:42:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:42:53,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:42:53,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037401812] [2023-01-27 20:42:53,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037401812] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:42:53,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055817324] [2023-01-27 20:42:53,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:42:53,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:42:53,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:42:53,782 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:42:53,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-27 20:42:53,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:42:53,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:42:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 20:42:53,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:42:54,034 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 20:42:54,066 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 20:42:54,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 20:42:54,140 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 20:42:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:42:54,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:42:54,278 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2481 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2481))) (let ((.cse0 (select .cse1 c_~get2~0.base))) (or (not (= (select .cse0 c_~get2~0.offset) (select (select .cse1 c_~get1~0.base) c_~get1~0.offset))) (= |c_thread1Thread1of1ForFork0_#t~mem2| (select .cse0 (+ c_~get2~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))))))) is different from false [2023-01-27 20:42:54,302 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2481 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2481))) (let ((.cse0 (select .cse1 c_~get2~0.base))) (or (not (= (select .cse0 c_~get2~0.offset) (select (select .cse1 c_~get1~0.base) c_~get1~0.offset))) (let ((.cse2 (* c_thread1Thread1of1ForFork0_~i~0 4))) (= (select .cse0 (+ c_~get2~0.offset .cse2)) (select (select |c_#memory_int| c_~get1~0.base) (+ c_~get1~0.offset .cse2)))))))) is different from false [2023-01-27 20:42:54,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:42:54,360 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 93 treesize of output 57 [2023-01-27 20:42:54,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:42:54,368 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 884 treesize of output 783 [2023-01-27 20:42:54,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:42:54,385 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 376 treesize of output 356 [2023-01-27 20:42:54,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:42:54,397 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 301 treesize of output 269 [2023-01-27 20:42:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:42:54,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055817324] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:42:54,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:42:54,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2023-01-27 20:42:54,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221010869] [2023-01-27 20:42:54,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:42:54,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 20:42:54,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:42:54,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 20:42:54,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=460, Unknown=14, NotChecked=94, Total=702 [2023-01-27 20:42:54,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 435 [2023-01-27 20:42:54,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1010 transitions, 25101 flow. Second operand has 27 states, 27 states have (on average 138.88888888888889) internal successors, (3750), 27 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:42:54,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:42:54,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 435 [2023-01-27 20:42:54,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:43:00,777 INFO L130 PetriNetUnfolder]: 8832/16051 cut-off events. [2023-01-27 20:43:00,777 INFO L131 PetriNetUnfolder]: For 437913/437913 co-relation queries the response was YES. [2023-01-27 20:43:00,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160490 conditions, 16051 events. 8832/16051 cut-off events. For 437913/437913 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 132417 event pairs, 2894 based on Foata normal form. 36/16087 useless extension candidates. Maximal degree in co-relation 160372. Up to 13529 conditions per place. [2023-01-27 20:43:00,991 INFO L137 encePairwiseOnDemand]: 425/435 looper letters, 788 selfloop transitions, 326 changer transitions 3/1117 dead transitions. [2023-01-27 20:43:00,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1117 transitions, 29369 flow [2023-01-27 20:43:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 20:43:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 20:43:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1581 transitions. [2023-01-27 20:43:00,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3304075235109718 [2023-01-27 20:43:00,993 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1581 transitions. [2023-01-27 20:43:00,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1581 transitions. [2023-01-27 20:43:00,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:43:00,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1581 transitions. [2023-01-27 20:43:00,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 143.72727272727272) internal successors, (1581), 11 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:00,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:00,996 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 435.0) internal successors, (5220), 12 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:00,996 INFO L175 Difference]: Start difference. First operand has 372 places, 1010 transitions, 25101 flow. Second operand 11 states and 1581 transitions. [2023-01-27 20:43:00,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1117 transitions, 29369 flow [2023-01-27 20:43:05,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1117 transitions, 27831 flow, removed 65 selfloop flow, removed 22 redundant places. [2023-01-27 20:43:05,741 INFO L231 Difference]: Finished difference. Result has 354 places, 1008 transitions, 24319 flow [2023-01-27 20:43:05,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=23687, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=24319, PETRI_PLACES=354, PETRI_TRANSITIONS=1008} [2023-01-27 20:43:05,741 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 329 predicate places. [2023-01-27 20:43:05,741 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1008 transitions, 24319 flow [2023-01-27 20:43:05,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 138.88888888888889) internal successors, (3750), 27 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:05,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:43:05,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:43:05,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-27 20:43:05,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:43:05,947 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:43:05,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:43:05,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1119562755, now seen corresponding path program 12 times [2023-01-27 20:43:05,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:43:05,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94578977] [2023-01-27 20:43:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:43:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:43:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:43:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:43:06,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:43:06,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94578977] [2023-01-27 20:43:06,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94578977] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:43:06,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:43:06,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-01-27 20:43:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970980416] [2023-01-27 20:43:06,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:43:06,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 20:43:06,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:43:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 20:43:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-01-27 20:43:06,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 435 [2023-01-27 20:43:06,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1008 transitions, 24319 flow. Second operand has 11 states, 11 states have (on average 154.9090909090909) internal successors, (1704), 11 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:06,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:43:06,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 435 [2023-01-27 20:43:06,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:43:11,436 INFO L130 PetriNetUnfolder]: 8616/15655 cut-off events. [2023-01-27 20:43:11,436 INFO L131 PetriNetUnfolder]: For 409456/409456 co-relation queries the response was YES. [2023-01-27 20:43:11,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153442 conditions, 15655 events. 8616/15655 cut-off events. For 409456/409456 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 129223 event pairs, 2937 based on Foata normal form. 56/15711 useless extension candidates. Maximal degree in co-relation 153335. Up to 13528 conditions per place. [2023-01-27 20:43:11,645 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 722 selfloop transitions, 307 changer transitions 14/1043 dead transitions. [2023-01-27 20:43:11,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1043 transitions, 26931 flow [2023-01-27 20:43:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 20:43:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 20:43:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1278 transitions. [2023-01-27 20:43:11,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36724137931034484 [2023-01-27 20:43:11,647 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1278 transitions. [2023-01-27 20:43:11,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1278 transitions. [2023-01-27 20:43:11,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:43:11,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1278 transitions. [2023-01-27 20:43:11,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 159.75) internal successors, (1278), 8 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:11,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:11,649 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 435.0) internal successors, (3915), 9 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:11,649 INFO L175 Difference]: Start difference. First operand has 354 places, 1008 transitions, 24319 flow. Second operand 8 states and 1278 transitions. [2023-01-27 20:43:11,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1043 transitions, 26931 flow [2023-01-27 20:43:15,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1043 transitions, 26510 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-27 20:43:16,012 INFO L231 Difference]: Finished difference. Result has 354 places, 984 transitions, 23945 flow [2023-01-27 20:43:16,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=23572, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23945, PETRI_PLACES=354, PETRI_TRANSITIONS=984} [2023-01-27 20:43:16,013 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 329 predicate places. [2023-01-27 20:43:16,013 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 984 transitions, 23945 flow [2023-01-27 20:43:16,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 154.9090909090909) internal successors, (1704), 11 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:16,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:43:16,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:43:16,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2023-01-27 20:43:16,014 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:43:16,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:43:16,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1425301956, now seen corresponding path program 9 times [2023-01-27 20:43:16,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:43:16,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524728821] [2023-01-27 20:43:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:43:16,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:43:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:43:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:43:16,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:43:16,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524728821] [2023-01-27 20:43:16,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524728821] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:43:16,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133265522] [2023-01-27 20:43:16,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:43:16,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:43:16,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:43:16,279 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:43:16,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-27 20:43:16,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:43:16,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:43:16,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 20:43:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:43:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:43:16,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:43:16,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:43:16,999 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 158 treesize of output 122 [2023-01-27 20:43:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:43:17,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133265522] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:43:17,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:43:17,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 20:43:17,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636152507] [2023-01-27 20:43:17,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:43:17,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 20:43:17,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:43:17,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 20:43:17,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 20:43:17,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:43:17,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 984 transitions, 23945 flow. Second operand has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:17,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:43:17,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:43:17,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:43:24,992 INFO L130 PetriNetUnfolder]: 8531/15626 cut-off events. [2023-01-27 20:43:24,992 INFO L131 PetriNetUnfolder]: For 420243/420243 co-relation queries the response was YES. [2023-01-27 20:43:25,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151197 conditions, 15626 events. 8531/15626 cut-off events. For 420243/420243 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 129369 event pairs, 1403 based on Foata normal form. 210/15836 useless extension candidates. Maximal degree in co-relation 151091. Up to 5888 conditions per place. [2023-01-27 20:43:25,180 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 903 selfloop transitions, 428 changer transitions 22/1353 dead transitions. [2023-01-27 20:43:25,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 1353 transitions, 32790 flow [2023-01-27 20:43:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 20:43:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 20:43:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4519 transitions. [2023-01-27 20:43:25,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33511308861698186 [2023-01-27 20:43:25,183 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4519 transitions. [2023-01-27 20:43:25,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4519 transitions. [2023-01-27 20:43:25,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:43:25,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4519 transitions. [2023-01-27 20:43:25,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 145.7741935483871) internal successors, (4519), 31 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:25,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 435.0) internal successors, (13920), 32 states have internal predecessors, (13920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:25,194 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 435.0) internal successors, (13920), 32 states have internal predecessors, (13920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:25,194 INFO L175 Difference]: Start difference. First operand has 354 places, 984 transitions, 23945 flow. Second operand 31 states and 4519 transitions. [2023-01-27 20:43:25,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 1353 transitions, 32790 flow [2023-01-27 20:43:29,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1353 transitions, 31732 flow, removed 71 selfloop flow, removed 8 redundant places. [2023-01-27 20:43:29,335 INFO L231 Difference]: Finished difference. Result has 386 places, 1044 transitions, 25836 flow [2023-01-27 20:43:29,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=23033, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=25836, PETRI_PLACES=386, PETRI_TRANSITIONS=1044} [2023-01-27 20:43:29,336 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 361 predicate places. [2023-01-27 20:43:29,336 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1044 transitions, 25836 flow [2023-01-27 20:43:29,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:29,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:43:29,337 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:43:29,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-27 20:43:29,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:43:29,541 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:43:29,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:43:29,542 INFO L85 PathProgramCache]: Analyzing trace with hash -421326331, now seen corresponding path program 10 times [2023-01-27 20:43:29,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:43:29,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702119269] [2023-01-27 20:43:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:43:29,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:43:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:43:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:43:29,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:43:29,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702119269] [2023-01-27 20:43:29,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702119269] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:43:29,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420967086] [2023-01-27 20:43:29,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:43:29,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:43:29,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:43:29,745 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:43:29,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-27 20:43:29,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:43:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:43:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 20:43:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:43:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:43:30,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:43:30,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:43:30,275 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 158 treesize of output 122 [2023-01-27 20:43:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:43:30,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420967086] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:43:30,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:43:30,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-27 20:43:30,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778824227] [2023-01-27 20:43:30,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:43:30,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:43:30,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:43:30,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:43:30,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:43:30,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:43:30,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1044 transitions, 25836 flow. Second operand has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:43:30,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:43:30,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:43:30,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:43:36,925 INFO L130 PetriNetUnfolder]: 8495/15540 cut-off events. [2023-01-27 20:43:36,925 INFO L131 PetriNetUnfolder]: For 470039/470039 co-relation queries the response was YES. [2023-01-27 20:43:37,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156975 conditions, 15540 events. 8495/15540 cut-off events. For 470039/470039 co-relation queries the response was YES. Maximal size of possible extension queue 873. Compared 128449 event pairs, 1222 based on Foata normal form. 10/15550 useless extension candidates. Maximal degree in co-relation 156856. Up to 4554 conditions per place. [2023-01-27 20:43:37,156 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 934 selfloop transitions, 327 changer transitions 38/1299 dead transitions. [2023-01-27 20:43:37,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1299 transitions, 32980 flow [2023-01-27 20:43:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 20:43:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 20:43:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3220 transitions. [2023-01-27 20:43:37,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33646812957157785 [2023-01-27 20:43:37,158 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3220 transitions. [2023-01-27 20:43:37,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3220 transitions. [2023-01-27 20:43:37,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:43:37,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3220 transitions. [2023-01-27 20:43:37,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 146.36363636363637) internal successors, (3220), 22 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:37,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 435.0) internal successors, (10005), 23 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:37,165 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 435.0) internal successors, (10005), 23 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:37,165 INFO L175 Difference]: Start difference. First operand has 386 places, 1044 transitions, 25836 flow. Second operand 22 states and 3220 transitions. [2023-01-27 20:43:37,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1299 transitions, 32980 flow [2023-01-27 20:43:42,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1299 transitions, 32122 flow, removed 248 selfloop flow, removed 17 redundant places. [2023-01-27 20:43:42,512 INFO L231 Difference]: Finished difference. Result has 389 places, 1023 transitions, 25088 flow [2023-01-27 20:43:42,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=25030, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1044, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25088, PETRI_PLACES=389, PETRI_TRANSITIONS=1023} [2023-01-27 20:43:42,513 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 364 predicate places. [2023-01-27 20:43:42,513 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1023 transitions, 25088 flow [2023-01-27 20:43:42,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:43:42,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:43:42,514 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:43:42,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-27 20:43:42,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-01-27 20:43:42,719 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:43:42,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:43:42,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1261806005, now seen corresponding path program 11 times [2023-01-27 20:43:42,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:43:42,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087893021] [2023-01-27 20:43:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:43:42,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:43:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:43:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:43:42,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:43:42,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087893021] [2023-01-27 20:43:42,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087893021] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:43:42,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044631486] [2023-01-27 20:43:42,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:43:42,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:43:42,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:43:42,924 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:43:42,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-27 20:43:43,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:43:43,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:43:43,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:43:43,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:43:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:43:43,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:43:43,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:43:43,524 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 158 treesize of output 122 [2023-01-27 20:43:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:43:44,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044631486] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:43:44,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:43:44,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-27 20:43:44,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013862130] [2023-01-27 20:43:44,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:43:44,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:43:44,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:43:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:43:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2023-01-27 20:43:44,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 435 [2023-01-27 20:43:44,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1023 transitions, 25088 flow. Second operand has 31 states, 31 states have (on average 134.03225806451613) internal successors, (4155), 31 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:44,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:43:44,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 435 [2023-01-27 20:43:44,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:43:51,614 INFO L130 PetriNetUnfolder]: 8786/16139 cut-off events. [2023-01-27 20:43:51,614 INFO L131 PetriNetUnfolder]: For 472040/472040 co-relation queries the response was YES. [2023-01-27 20:43:51,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161735 conditions, 16139 events. 8786/16139 cut-off events. For 472040/472040 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 135991 event pairs, 848 based on Foata normal form. 372/16511 useless extension candidates. Maximal degree in co-relation 161619. Up to 4921 conditions per place. [2023-01-27 20:43:51,830 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 906 selfloop transitions, 589 changer transitions 56/1551 dead transitions. [2023-01-27 20:43:51,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1551 transitions, 37732 flow [2023-01-27 20:43:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-01-27 20:43:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-01-27 20:43:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 6666 transitions. [2023-01-27 20:43:51,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3192528735632184 [2023-01-27 20:43:51,834 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 6666 transitions. [2023-01-27 20:43:51,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 6666 transitions. [2023-01-27 20:43:51,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:43:51,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 6666 transitions. [2023-01-27 20:43:51,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 138.875) internal successors, (6666), 48 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:51,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 435.0) internal successors, (21315), 49 states have internal predecessors, (21315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:51,849 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 435.0) internal successors, (21315), 49 states have internal predecessors, (21315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:51,849 INFO L175 Difference]: Start difference. First operand has 389 places, 1023 transitions, 25088 flow. Second operand 48 states and 6666 transitions. [2023-01-27 20:43:51,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1551 transitions, 37732 flow [2023-01-27 20:43:56,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 1551 transitions, 36809 flow, removed 94 selfloop flow, removed 21 redundant places. [2023-01-27 20:43:56,823 INFO L231 Difference]: Finished difference. Result has 433 places, 1202 transitions, 30945 flow [2023-01-27 20:43:56,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=24367, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=30945, PETRI_PLACES=433, PETRI_TRANSITIONS=1202} [2023-01-27 20:43:56,824 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 408 predicate places. [2023-01-27 20:43:56,824 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1202 transitions, 30945 flow [2023-01-27 20:43:56,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 134.03225806451613) internal successors, (4155), 31 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:56,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:43:56,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:43:56,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-27 20:43:57,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-01-27 20:43:57,030 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:43:57,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:43:57,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1972669122, now seen corresponding path program 12 times [2023-01-27 20:43:57,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:43:57,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460508846] [2023-01-27 20:43:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:43:57,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:43:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:43:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:43:57,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:43:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460508846] [2023-01-27 20:43:57,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460508846] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:43:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597724011] [2023-01-27 20:43:57,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:43:57,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:43:57,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:43:57,253 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:43:57,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-27 20:43:57,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 20:43:57,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:43:57,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:43:57,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:43:57,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:43:57,823 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 112 treesize of output 77 [2023-01-27 20:43:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:43:57,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:43:57,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:43:57,946 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 158 treesize of output 122 [2023-01-27 20:43:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:43:59,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597724011] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:43:59,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:43:59,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 20:43:59,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758985101] [2023-01-27 20:43:59,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:43:59,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 20:43:59,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:43:59,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 20:43:59,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 20:43:59,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:43:59,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1202 transitions, 30945 flow. Second operand has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:43:59,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:43:59,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:43:59,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:44:07,736 INFO L130 PetriNetUnfolder]: 8688/15913 cut-off events. [2023-01-27 20:44:07,736 INFO L131 PetriNetUnfolder]: For 511555/511555 co-relation queries the response was YES. [2023-01-27 20:44:07,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169253 conditions, 15913 events. 8688/15913 cut-off events. For 511555/511555 co-relation queries the response was YES. Maximal size of possible extension queue 918. Compared 133004 event pairs, 1578 based on Foata normal form. 2/15915 useless extension candidates. Maximal degree in co-relation 169117. Up to 5812 conditions per place. [2023-01-27 20:44:07,980 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1001 selfloop transitions, 465 changer transitions 16/1482 dead transitions. [2023-01-27 20:44:07,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1482 transitions, 37487 flow [2023-01-27 20:44:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-27 20:44:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-27 20:44:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4815 transitions. [2023-01-27 20:44:07,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335423197492163 [2023-01-27 20:44:07,983 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4815 transitions. [2023-01-27 20:44:07,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4815 transitions. [2023-01-27 20:44:07,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:44:07,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4815 transitions. [2023-01-27 20:44:07,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 145.9090909090909) internal successors, (4815), 33 states have internal predecessors, (4815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:07,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 435.0) internal successors, (14790), 34 states have internal predecessors, (14790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:07,992 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 435.0) internal successors, (14790), 34 states have internal predecessors, (14790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:07,992 INFO L175 Difference]: Start difference. First operand has 433 places, 1202 transitions, 30945 flow. Second operand 33 states and 4815 transitions. [2023-01-27 20:44:07,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1482 transitions, 37487 flow [2023-01-27 20:44:15,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1482 transitions, 34853 flow, removed 687 selfloop flow, removed 36 redundant places. [2023-01-27 20:44:15,578 INFO L231 Difference]: Finished difference. Result has 426 places, 1199 transitions, 29189 flow [2023-01-27 20:44:15,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=28353, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=464, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=29189, PETRI_PLACES=426, PETRI_TRANSITIONS=1199} [2023-01-27 20:44:15,579 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 401 predicate places. [2023-01-27 20:44:15,579 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1199 transitions, 29189 flow [2023-01-27 20:44:15,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:15,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:44:15,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:44:15,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-27 20:44:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-01-27 20:44:15,785 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:44:15,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:44:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1534962704, now seen corresponding path program 13 times [2023-01-27 20:44:15,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:44:15,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453012732] [2023-01-27 20:44:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:44:15,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:44:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:44:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:44:16,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:44:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453012732] [2023-01-27 20:44:16,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453012732] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:44:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813099129] [2023-01-27 20:44:16,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:44:16,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:44:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:44:16,178 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:44:16,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-27 20:44:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:44:16,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-27 20:44:16,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:44:16,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:44:16,874 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 108 treesize of output 73 [2023-01-27 20:44:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:44:16,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:44:17,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:44:17,258 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 158 treesize of output 122 [2023-01-27 20:44:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:44:18,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813099129] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:44:18,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:44:18,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 20:44:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283646731] [2023-01-27 20:44:18,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:44:18,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 20:44:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:44:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 20:44:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 20:44:18,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:44:18,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1199 transitions, 29189 flow. Second operand has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:18,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:44:18,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:44:18,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:44:27,906 INFO L130 PetriNetUnfolder]: 8694/15933 cut-off events. [2023-01-27 20:44:27,908 INFO L131 PetriNetUnfolder]: For 432632/432632 co-relation queries the response was YES. [2023-01-27 20:44:28,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156743 conditions, 15933 events. 8694/15933 cut-off events. For 432632/432632 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 132962 event pairs, 1579 based on Foata normal form. 4/15937 useless extension candidates. Maximal degree in co-relation 156629. Up to 4897 conditions per place. [2023-01-27 20:44:28,133 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1564 selfloop transitions, 483 changer transitions 18/2065 dead transitions. [2023-01-27 20:44:28,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 2065 transitions, 49215 flow [2023-01-27 20:44:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-01-27 20:44:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-01-27 20:44:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 6841 transitions. [2023-01-27 20:44:28,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33460503790657864 [2023-01-27 20:44:28,137 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 6841 transitions. [2023-01-27 20:44:28,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 6841 transitions. [2023-01-27 20:44:28,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:44:28,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 6841 transitions. [2023-01-27 20:44:28,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 145.5531914893617) internal successors, (6841), 47 states have internal predecessors, (6841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:28,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 435.0) internal successors, (20880), 48 states have internal predecessors, (20880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:28,152 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 435.0) internal successors, (20880), 48 states have internal predecessors, (20880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:28,152 INFO L175 Difference]: Start difference. First operand has 426 places, 1199 transitions, 29189 flow. Second operand 47 states and 6841 transitions. [2023-01-27 20:44:28,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 2065 transitions, 49215 flow [2023-01-27 20:44:34,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 2065 transitions, 48395 flow, removed 51 selfloop flow, removed 27 redundant places. [2023-01-27 20:44:34,762 INFO L231 Difference]: Finished difference. Result has 445 places, 1205 transitions, 29481 flow [2023-01-27 20:44:34,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=28431, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=29481, PETRI_PLACES=445, PETRI_TRANSITIONS=1205} [2023-01-27 20:44:34,763 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 420 predicate places. [2023-01-27 20:44:34,763 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1205 transitions, 29481 flow [2023-01-27 20:44:34,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:34,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:44:34,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:44:34,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-01-27 20:44:34,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:44:34,969 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:44:34,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:44:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1054820624, now seen corresponding path program 14 times [2023-01-27 20:44:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:44:34,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375677482] [2023-01-27 20:44:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:44:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:44:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:44:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:44:35,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:44:35,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375677482] [2023-01-27 20:44:35,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375677482] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:44:35,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292691256] [2023-01-27 20:44:35,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:44:35,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:44:35,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:44:35,326 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:44:35,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-27 20:44:35,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:44:35,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:44:35,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:44:35,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:44:35,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:44:35,824 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 108 treesize of output 73 [2023-01-27 20:44:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:44:35,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:44:36,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:44:36,244 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 158 treesize of output 122 [2023-01-27 20:44:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:44:36,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292691256] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:44:36,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:44:36,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 20:44:36,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422582816] [2023-01-27 20:44:36,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:44:36,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 20:44:36,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:44:36,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 20:44:36,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 20:44:36,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:44:36,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1205 transitions, 29481 flow. Second operand has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:36,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:44:36,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:44:36,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:44:43,548 INFO L130 PetriNetUnfolder]: 8720/15991 cut-off events. [2023-01-27 20:44:43,548 INFO L131 PetriNetUnfolder]: For 420863/420863 co-relation queries the response was YES. [2023-01-27 20:44:43,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158234 conditions, 15991 events. 8720/15991 cut-off events. For 420863/420863 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 133424 event pairs, 1566 based on Foata normal form. 2/15993 useless extension candidates. Maximal degree in co-relation 158123. Up to 5812 conditions per place. [2023-01-27 20:44:43,730 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 933 selfloop transitions, 515 changer transitions 10/1458 dead transitions. [2023-01-27 20:44:43,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 1458 transitions, 35899 flow [2023-01-27 20:44:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-27 20:44:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-27 20:44:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4356 transitions. [2023-01-27 20:44:43,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33379310344827584 [2023-01-27 20:44:43,733 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4356 transitions. [2023-01-27 20:44:43,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4356 transitions. [2023-01-27 20:44:43,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:44:43,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4356 transitions. [2023-01-27 20:44:43,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 145.2) internal successors, (4356), 30 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:43,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 435.0) internal successors, (13485), 31 states have internal predecessors, (13485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:43,746 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 435.0) internal successors, (13485), 31 states have internal predecessors, (13485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:43,746 INFO L175 Difference]: Start difference. First operand has 445 places, 1205 transitions, 29481 flow. Second operand 30 states and 4356 transitions. [2023-01-27 20:44:43,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 1458 transitions, 35899 flow [2023-01-27 20:44:49,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1458 transitions, 35090 flow, removed 7 selfloop flow, removed 38 redundant places. [2023-01-27 20:44:49,456 INFO L231 Difference]: Finished difference. Result has 435 places, 1207 transitions, 29738 flow [2023-01-27 20:44:49,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=28683, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=29738, PETRI_PLACES=435, PETRI_TRANSITIONS=1207} [2023-01-27 20:44:49,456 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 410 predicate places. [2023-01-27 20:44:49,457 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 1207 transitions, 29738 flow [2023-01-27 20:44:49,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:49,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:44:49,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:44:49,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-01-27 20:44:49,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:44:49,658 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:44:49,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:44:49,658 INFO L85 PathProgramCache]: Analyzing trace with hash 462670569, now seen corresponding path program 13 times [2023-01-27 20:44:49,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:44:49,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874621198] [2023-01-27 20:44:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:44:49,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:44:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:44:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 20:44:49,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:44:49,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874621198] [2023-01-27 20:44:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874621198] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 20:44:49,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 20:44:49,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-01-27 20:44:49,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006715743] [2023-01-27 20:44:49,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 20:44:49,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 20:44:49,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:44:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 20:44:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-01-27 20:44:49,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 435 [2023-01-27 20:44:49,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 1207 transitions, 29738 flow. Second operand has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:49,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:44:49,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 435 [2023-01-27 20:44:49,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:44:55,149 INFO L130 PetriNetUnfolder]: 8570/15699 cut-off events. [2023-01-27 20:44:55,149 INFO L131 PetriNetUnfolder]: For 416899/416899 co-relation queries the response was YES. [2023-01-27 20:44:55,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157064 conditions, 15699 events. 8570/15699 cut-off events. For 416899/416899 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 130245 event pairs, 3128 based on Foata normal form. 36/15735 useless extension candidates. Maximal degree in co-relation 156953. Up to 13999 conditions per place. [2023-01-27 20:44:55,334 INFO L137 encePairwiseOnDemand]: 428/435 looper letters, 886 selfloop transitions, 344 changer transitions 3/1233 dead transitions. [2023-01-27 20:44:55,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1233 transitions, 32872 flow [2023-01-27 20:44:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 20:44:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 20:44:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1144 transitions. [2023-01-27 20:44:55,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3756978653530378 [2023-01-27 20:44:55,335 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1144 transitions. [2023-01-27 20:44:55,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1144 transitions. [2023-01-27 20:44:55,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:44:55,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1144 transitions. [2023-01-27 20:44:55,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 163.42857142857142) internal successors, (1144), 7 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:55,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:55,338 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 435.0) internal successors, (3480), 8 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:44:55,338 INFO L175 Difference]: Start difference. First operand has 435 places, 1207 transitions, 29738 flow. Second operand 7 states and 1144 transitions. [2023-01-27 20:44:55,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1233 transitions, 32872 flow [2023-01-27 20:45:00,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1233 transitions, 31851 flow, removed 16 selfloop flow, removed 23 redundant places. [2023-01-27 20:45:01,028 INFO L231 Difference]: Finished difference. Result has 415 places, 1189 transitions, 29037 flow [2023-01-27 20:45:01,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=28387, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29037, PETRI_PLACES=415, PETRI_TRANSITIONS=1189} [2023-01-27 20:45:01,042 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 390 predicate places. [2023-01-27 20:45:01,042 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 1189 transitions, 29037 flow [2023-01-27 20:45:01,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 159.33333333333334) internal successors, (1434), 9 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:01,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:45:01,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:45:01,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2023-01-27 20:45:01,042 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:45:01,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:45:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2113911795, now seen corresponding path program 15 times [2023-01-27 20:45:01,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:45:01,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458665600] [2023-01-27 20:45:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:45:01,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:45:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:45:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:45:01,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:45:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458665600] [2023-01-27 20:45:01,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458665600] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:45:01,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530290304] [2023-01-27 20:45:01,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:45:01,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:45:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:45:01,244 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:45:01,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-27 20:45:01,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:45:01,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:45:01,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 20:45:01,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:45:01,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:45:01,699 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 108 treesize of output 73 [2023-01-27 20:45:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:45:01,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:45:01,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:45:01,986 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 158 treesize of output 122 [2023-01-27 20:45:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:45:02,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530290304] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:45:02,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:45:02,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-01-27 20:45:02,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306640900] [2023-01-27 20:45:02,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:45:02,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 20:45:02,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:45:02,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 20:45:02,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2023-01-27 20:45:02,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:45:02,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 1189 transitions, 29037 flow. Second operand has 30 states, 30 states have (on average 140.8) internal successors, (4224), 30 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:02,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:45:02,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:45:02,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:45:08,207 INFO L130 PetriNetUnfolder]: 8550/15663 cut-off events. [2023-01-27 20:45:08,207 INFO L131 PetriNetUnfolder]: For 398426/398426 co-relation queries the response was YES. [2023-01-27 20:45:08,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155689 conditions, 15663 events. 8550/15663 cut-off events. For 398426/398426 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 129843 event pairs, 2252 based on Foata normal form. 8/15671 useless extension candidates. Maximal degree in co-relation 155579. Up to 8913 conditions per place. [2023-01-27 20:45:08,388 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 1168 selfloop transitions, 206 changer transitions 8/1382 dead transitions. [2023-01-27 20:45:08,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1382 transitions, 34537 flow [2023-01-27 20:45:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 20:45:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 20:45:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2652 transitions. [2023-01-27 20:45:08,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33869731800766284 [2023-01-27 20:45:08,390 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2652 transitions. [2023-01-27 20:45:08,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2652 transitions. [2023-01-27 20:45:08,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:45:08,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2652 transitions. [2023-01-27 20:45:08,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 147.33333333333334) internal successors, (2652), 18 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:08,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 435.0) internal successors, (8265), 19 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:08,395 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 435.0) internal successors, (8265), 19 states have internal predecessors, (8265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:08,395 INFO L175 Difference]: Start difference. First operand has 415 places, 1189 transitions, 29037 flow. Second operand 18 states and 2652 transitions. [2023-01-27 20:45:08,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1382 transitions, 34537 flow [2023-01-27 20:45:13,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 1382 transitions, 33361 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-01-27 20:45:13,954 INFO L231 Difference]: Finished difference. Result has 419 places, 1185 transitions, 28379 flow [2023-01-27 20:45:13,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=28043, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=28379, PETRI_PLACES=419, PETRI_TRANSITIONS=1185} [2023-01-27 20:45:13,954 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 394 predicate places. [2023-01-27 20:45:13,955 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 1185 transitions, 28379 flow [2023-01-27 20:45:13,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 140.8) internal successors, (4224), 30 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:13,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:45:13,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:45:13,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-01-27 20:45:14,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:45:14,174 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:45:14,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:45:14,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1678663921, now seen corresponding path program 16 times [2023-01-27 20:45:14,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:45:14,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319443891] [2023-01-27 20:45:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:45:14,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:45:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:45:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:45:14,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:45:14,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319443891] [2023-01-27 20:45:14,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319443891] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:45:14,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305934300] [2023-01-27 20:45:14,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:45:14,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:45:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:45:14,377 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:45:14,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-27 20:45:14,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:45:14,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:45:14,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 20:45:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:45:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:45:14,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:45:14,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:45:14,893 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 158 treesize of output 122 [2023-01-27 20:45:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:45:15,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305934300] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:45:15,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:45:15,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-27 20:45:15,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498987572] [2023-01-27 20:45:15,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:45:15,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:45:15,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:45:15,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:45:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:45:15,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:45:15,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1185 transitions, 28379 flow. Second operand has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:45:15,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:45:15,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:45:15,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:45:21,684 INFO L130 PetriNetUnfolder]: 8550/15659 cut-off events. [2023-01-27 20:45:21,685 INFO L131 PetriNetUnfolder]: For 394585/394585 co-relation queries the response was YES. [2023-01-27 20:45:21,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154291 conditions, 15659 events. 8550/15659 cut-off events. For 394585/394585 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 129862 event pairs, 1330 based on Foata normal form. 4/15663 useless extension candidates. Maximal degree in co-relation 154184. Up to 4793 conditions per place. [2023-01-27 20:45:21,860 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 993 selfloop transitions, 421 changer transitions 14/1428 dead transitions. [2023-01-27 20:45:21,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1428 transitions, 34369 flow [2023-01-27 20:45:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 20:45:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 20:45:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4097 transitions. [2023-01-27 20:45:21,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33637110016420363 [2023-01-27 20:45:21,863 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4097 transitions. [2023-01-27 20:45:21,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4097 transitions. [2023-01-27 20:45:21,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:45:21,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4097 transitions. [2023-01-27 20:45:21,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 146.32142857142858) internal successors, (4097), 28 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:21,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 435.0) internal successors, (12615), 29 states have internal predecessors, (12615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:21,871 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 435.0) internal successors, (12615), 29 states have internal predecessors, (12615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:21,871 INFO L175 Difference]: Start difference. First operand has 419 places, 1185 transitions, 28379 flow. Second operand 28 states and 4097 transitions. [2023-01-27 20:45:21,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1428 transitions, 34369 flow [2023-01-27 20:45:27,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 1428 transitions, 33658 flow, removed 16 selfloop flow, removed 14 redundant places. [2023-01-27 20:45:27,361 INFO L231 Difference]: Finished difference. Result has 432 places, 1179 transitions, 28294 flow [2023-01-27 20:45:27,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=27680, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=28294, PETRI_PLACES=432, PETRI_TRANSITIONS=1179} [2023-01-27 20:45:27,362 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 407 predicate places. [2023-01-27 20:45:27,362 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1179 transitions, 28294 flow [2023-01-27 20:45:27,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:45:27,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:45:27,363 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:45:27,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-01-27 20:45:27,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:45:27,568 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:45:27,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:45:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash -583366709, now seen corresponding path program 17 times [2023-01-27 20:45:27,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:45:27,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941531695] [2023-01-27 20:45:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:45:27,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:45:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:45:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:45:27,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:45:27,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941531695] [2023-01-27 20:45:27,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941531695] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:45:27,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055200128] [2023-01-27 20:45:27,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:45:27,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:45:27,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:45:27,775 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:45:27,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-01-27 20:45:27,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:45:27,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:45:27,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:45:27,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:45:28,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:45:28,284 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 112 treesize of output 77 [2023-01-27 20:45:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:45:28,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:45:28,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:45:28,399 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 158 treesize of output 122 [2023-01-27 20:45:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:45:29,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055200128] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:45:29,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:45:29,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-27 20:45:29,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743464915] [2023-01-27 20:45:29,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:45:29,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:45:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:45:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:45:29,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:45:29,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:45:29,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1179 transitions, 28294 flow. Second operand has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:45:29,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:45:29,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:45:29,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:45:34,515 INFO L130 PetriNetUnfolder]: 8530/15599 cut-off events. [2023-01-27 20:45:34,515 INFO L131 PetriNetUnfolder]: For 395146/395146 co-relation queries the response was YES. [2023-01-27 20:45:34,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153812 conditions, 15599 events. 8530/15599 cut-off events. For 395146/395146 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 129046 event pairs, 1328 based on Foata normal form. 4/15603 useless extension candidates. Maximal degree in co-relation 153709. Up to 4785 conditions per place. [2023-01-27 20:45:34,698 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 960 selfloop transitions, 402 changer transitions 19/1381 dead transitions. [2023-01-27 20:45:34,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1381 transitions, 33801 flow [2023-01-27 20:45:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 20:45:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 20:45:34,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3505 transitions. [2023-01-27 20:45:34,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.335727969348659 [2023-01-27 20:45:34,701 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3505 transitions. [2023-01-27 20:45:34,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3505 transitions. [2023-01-27 20:45:34,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:45:34,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3505 transitions. [2023-01-27 20:45:34,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 146.04166666666666) internal successors, (3505), 24 states have internal predecessors, (3505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:34,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 435.0) internal successors, (10875), 25 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:34,707 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 435.0) internal successors, (10875), 25 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:34,707 INFO L175 Difference]: Start difference. First operand has 432 places, 1179 transitions, 28294 flow. Second operand 24 states and 3505 transitions. [2023-01-27 20:45:34,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1381 transitions, 33801 flow [2023-01-27 20:45:39,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1381 transitions, 32973 flow, removed 6 selfloop flow, removed 24 redundant places. [2023-01-27 20:45:39,879 INFO L231 Difference]: Finished difference. Result has 430 places, 1170 transitions, 28021 flow [2023-01-27 20:45:39,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=27470, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=777, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=28021, PETRI_PLACES=430, PETRI_TRANSITIONS=1170} [2023-01-27 20:45:39,880 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 405 predicate places. [2023-01-27 20:45:39,880 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1170 transitions, 28021 flow [2023-01-27 20:45:39,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:45:39,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:45:39,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:45:39,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-01-27 20:45:40,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:45:40,086 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:45:40,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:45:40,087 INFO L85 PathProgramCache]: Analyzing trace with hash -27812389, now seen corresponding path program 18 times [2023-01-27 20:45:40,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:45:40,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140499663] [2023-01-27 20:45:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:45:40,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:45:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:45:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:45:40,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:45:40,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140499663] [2023-01-27 20:45:40,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140499663] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:45:40,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677923849] [2023-01-27 20:45:40,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:45:40,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:45:40,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:45:40,305 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:45:40,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-01-27 20:45:40,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 20:45:40,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:45:40,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:45:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:45:40,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:45:40,891 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 108 treesize of output 73 [2023-01-27 20:45:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:45:40,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:45:41,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:45:41,121 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 158 treesize of output 122 [2023-01-27 20:45:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:45:41,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677923849] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:45:41,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:45:41,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-27 20:45:41,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979500213] [2023-01-27 20:45:41,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:45:41,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:45:41,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:45:41,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:45:41,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:45:41,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:45:41,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1170 transitions, 28021 flow. Second operand has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:45:41,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:45:41,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:45:41,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:45:47,249 INFO L130 PetriNetUnfolder]: 8532/15599 cut-off events. [2023-01-27 20:45:47,250 INFO L131 PetriNetUnfolder]: For 395598/395598 co-relation queries the response was YES. [2023-01-27 20:45:47,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153459 conditions, 15599 events. 8532/15599 cut-off events. For 395598/395598 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 128974 event pairs, 1320 based on Foata normal form. 4/15603 useless extension candidates. Maximal degree in co-relation 153358. Up to 4799 conditions per place. [2023-01-27 20:45:47,424 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 951 selfloop transitions, 452 changer transitions 6/1409 dead transitions. [2023-01-27 20:45:47,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1409 transitions, 34093 flow [2023-01-27 20:45:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 20:45:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 20:45:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3944 transitions. [2023-01-27 20:45:47,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3358024691358025 [2023-01-27 20:45:47,426 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3944 transitions. [2023-01-27 20:45:47,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3944 transitions. [2023-01-27 20:45:47,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:45:47,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3944 transitions. [2023-01-27 20:45:47,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 146.07407407407408) internal successors, (3944), 27 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:47,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 435.0) internal successors, (12180), 28 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:47,434 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 435.0) internal successors, (12180), 28 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:47,434 INFO L175 Difference]: Start difference. First operand has 430 places, 1170 transitions, 28021 flow. Second operand 27 states and 3944 transitions. [2023-01-27 20:45:47,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1409 transitions, 34093 flow [2023-01-27 20:45:52,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1409 transitions, 33257 flow, removed 7 selfloop flow, removed 23 redundant places. [2023-01-27 20:45:52,772 INFO L231 Difference]: Finished difference. Result has 430 places, 1171 transitions, 28133 flow [2023-01-27 20:45:52,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=27198, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28133, PETRI_PLACES=430, PETRI_TRANSITIONS=1171} [2023-01-27 20:45:52,773 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 405 predicate places. [2023-01-27 20:45:52,773 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1171 transitions, 28133 flow [2023-01-27 20:45:52,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:45:52,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:45:52,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:45:52,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-01-27 20:45:52,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2023-01-27 20:45:52,979 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:45:52,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:45:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash -900685301, now seen corresponding path program 19 times [2023-01-27 20:45:52,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:45:52,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597643847] [2023-01-27 20:45:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:45:52,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:45:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:45:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:45:53,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:45:53,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597643847] [2023-01-27 20:45:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597643847] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:45:53,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738391225] [2023-01-27 20:45:53,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:45:53,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:45:53,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:45:53,172 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:45:53,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-01-27 20:45:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:45:53,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 20:45:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:45:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:45:53,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:45:53,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:45:53,789 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 158 treesize of output 122 [2023-01-27 20:45:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:45:53,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738391225] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:45:53,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:45:53,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-27 20:45:53,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93743981] [2023-01-27 20:45:53,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:45:53,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 20:45:53,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:45:53,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 20:45:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2023-01-27 20:45:53,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:45:53,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1171 transitions, 28133 flow. Second operand has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:45:53,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:45:53,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:45:53,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:45:59,548 INFO L130 PetriNetUnfolder]: 8528/15571 cut-off events. [2023-01-27 20:45:59,548 INFO L131 PetriNetUnfolder]: For 394602/394602 co-relation queries the response was YES. [2023-01-27 20:45:59,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153666 conditions, 15571 events. 8528/15571 cut-off events. For 394602/394602 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 129124 event pairs, 1322 based on Foata normal form. 4/15575 useless extension candidates. Maximal degree in co-relation 153564. Up to 4795 conditions per place. [2023-01-27 20:45:59,729 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 923 selfloop transitions, 455 changer transitions 6/1384 dead transitions. [2023-01-27 20:45:59,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1384 transitions, 33873 flow [2023-01-27 20:45:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 20:45:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 20:45:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3781 transitions. [2023-01-27 20:45:59,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3343059239610964 [2023-01-27 20:45:59,731 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3781 transitions. [2023-01-27 20:45:59,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3781 transitions. [2023-01-27 20:45:59,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:45:59,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3781 transitions. [2023-01-27 20:45:59,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 145.42307692307693) internal successors, (3781), 26 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:59,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:59,738 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 435.0) internal successors, (11745), 27 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:45:59,738 INFO L175 Difference]: Start difference. First operand has 430 places, 1171 transitions, 28133 flow. Second operand 26 states and 3781 transitions. [2023-01-27 20:45:59,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1384 transitions, 33873 flow [2023-01-27 20:46:04,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 1384 transitions, 33137 flow, removed 4 selfloop flow, removed 24 redundant places. [2023-01-27 20:46:04,723 INFO L231 Difference]: Finished difference. Result has 431 places, 1169 transitions, 28275 flow [2023-01-27 20:46:04,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=27401, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=28275, PETRI_PLACES=431, PETRI_TRANSITIONS=1169} [2023-01-27 20:46:04,724 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 406 predicate places. [2023-01-27 20:46:04,724 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1169 transitions, 28275 flow [2023-01-27 20:46:04,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 140.96875) internal successors, (4511), 32 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 20:46:04,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:46:04,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:46:04,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-01-27 20:46:04,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2023-01-27 20:46:04,929 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:46:04,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:46:04,930 INFO L85 PathProgramCache]: Analyzing trace with hash 276327318, now seen corresponding path program 20 times [2023-01-27 20:46:04,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:46:04,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855158711] [2023-01-27 20:46:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:46:04,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:46:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:46:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:05,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:46:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855158711] [2023-01-27 20:46:05,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855158711] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:46:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121485445] [2023-01-27 20:46:05,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:46:05,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:46:05,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:46:05,157 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:46:05,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-01-27 20:46:05,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:46:05,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:46:05,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 20:46:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:46:05,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:46:05,674 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 112 treesize of output 77 [2023-01-27 20:46:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:05,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:46:05,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:46:05,784 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 158 treesize of output 122 [2023-01-27 20:46:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:06,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121485445] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:46:06,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:46:06,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-27 20:46:06,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069835548] [2023-01-27 20:46:06,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:46:06,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-27 20:46:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:46:06,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-27 20:46:06,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2023-01-27 20:46:06,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 435 [2023-01-27 20:46:06,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1169 transitions, 28275 flow. Second operand has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:06,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:46:06,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 435 [2023-01-27 20:46:06,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:46:11,987 INFO L130 PetriNetUnfolder]: 8524/15545 cut-off events. [2023-01-27 20:46:11,987 INFO L131 PetriNetUnfolder]: For 400045/400045 co-relation queries the response was YES. [2023-01-27 20:46:12,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155240 conditions, 15545 events. 8524/15545 cut-off events. For 400045/400045 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 127904 event pairs, 1520 based on Foata normal form. 2/15547 useless extension candidates. Maximal degree in co-relation 155139. Up to 5572 conditions per place. [2023-01-27 20:46:12,163 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 932 selfloop transitions, 434 changer transitions 17/1383 dead transitions. [2023-01-27 20:46:12,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1383 transitions, 33790 flow [2023-01-27 20:46:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 20:46:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 20:46:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4077 transitions. [2023-01-27 20:46:12,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3347290640394089 [2023-01-27 20:46:12,165 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4077 transitions. [2023-01-27 20:46:12,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4077 transitions. [2023-01-27 20:46:12,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:46:12,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4077 transitions. [2023-01-27 20:46:12,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 145.60714285714286) internal successors, (4077), 28 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:12,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 435.0) internal successors, (12615), 29 states have internal predecessors, (12615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:12,173 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 435.0) internal successors, (12615), 29 states have internal predecessors, (12615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:12,173 INFO L175 Difference]: Start difference. First operand has 431 places, 1169 transitions, 28275 flow. Second operand 28 states and 4077 transitions. [2023-01-27 20:46:12,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1383 transitions, 33790 flow [2023-01-27 20:46:17,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1383 transitions, 33085 flow, removed 3 selfloop flow, removed 23 redundant places. [2023-01-27 20:46:17,541 INFO L231 Difference]: Finished difference. Result has 433 places, 1162 transitions, 28272 flow [2023-01-27 20:46:17,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=27574, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=28272, PETRI_PLACES=433, PETRI_TRANSITIONS=1162} [2023-01-27 20:46:17,542 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 408 predicate places. [2023-01-27 20:46:17,542 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1162 transitions, 28272 flow [2023-01-27 20:46:17,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 140.8) internal successors, (4928), 35 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:17,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:46:17,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:46:17,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-01-27 20:46:17,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-01-27 20:46:17,748 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:46:17,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:46:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash -279449182, now seen corresponding path program 21 times [2023-01-27 20:46:17,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:46:17,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94897327] [2023-01-27 20:46:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:46:17,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:46:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:46:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:17,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:46:17,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94897327] [2023-01-27 20:46:17,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94897327] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:46:17,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067159272] [2023-01-27 20:46:17,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:46:17,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:46:17,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:46:17,958 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:46:17,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-01-27 20:46:18,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 20:46:18,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:46:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 26 conjunts are in the unsatisfiable core [2023-01-27 20:46:18,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:46:18,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:46:18,330 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 108 treesize of output 73 [2023-01-27 20:46:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:18,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:46:18,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 20:46:18,724 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 158 treesize of output 122 [2023-01-27 20:46:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:19,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067159272] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:46:19,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:46:19,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-01-27 20:46:19,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185662874] [2023-01-27 20:46:19,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:46:19,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:46:19,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:46:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:46:19,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2023-01-27 20:46:19,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 435 [2023-01-27 20:46:19,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1162 transitions, 28272 flow. Second operand has 31 states, 31 states have (on average 134.03225806451613) internal successors, (4155), 31 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:19,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:46:19,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 435 [2023-01-27 20:46:19,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:46:25,787 INFO L130 PetriNetUnfolder]: 8688/15911 cut-off events. [2023-01-27 20:46:25,787 INFO L131 PetriNetUnfolder]: For 398316/398316 co-relation queries the response was YES. [2023-01-27 20:46:25,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159025 conditions, 15911 events. 8688/15911 cut-off events. For 398316/398316 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 132027 event pairs, 384 based on Foata normal form. 6/15917 useless extension candidates. Maximal degree in co-relation 158925. Up to 4915 conditions per place. [2023-01-27 20:46:25,972 INFO L137 encePairwiseOnDemand]: 421/435 looper letters, 538 selfloop transitions, 932 changer transitions 17/1487 dead transitions. [2023-01-27 20:46:25,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1487 transitions, 35632 flow [2023-01-27 20:46:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-01-27 20:46:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-01-27 20:46:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 6864 transitions. [2023-01-27 20:46:25,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3155862068965517 [2023-01-27 20:46:25,977 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 6864 transitions. [2023-01-27 20:46:25,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 6864 transitions. [2023-01-27 20:46:25,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:46:25,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 6864 transitions. [2023-01-27 20:46:25,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 137.28) internal successors, (6864), 50 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:25,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 435.0) internal successors, (22185), 51 states have internal predecessors, (22185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:25,990 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 435.0) internal successors, (22185), 51 states have internal predecessors, (22185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:25,991 INFO L175 Difference]: Start difference. First operand has 433 places, 1162 transitions, 28272 flow. Second operand 50 states and 6864 transitions. [2023-01-27 20:46:25,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1487 transitions, 35632 flow [2023-01-27 20:46:31,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1487 transitions, 34867 flow, removed 3 selfloop flow, removed 26 redundant places. [2023-01-27 20:46:31,688 INFO L231 Difference]: Finished difference. Result has 461 places, 1273 transitions, 31906 flow [2023-01-27 20:46:31,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=27555, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=824, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=31906, PETRI_PLACES=461, PETRI_TRANSITIONS=1273} [2023-01-27 20:46:31,688 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 436 predicate places. [2023-01-27 20:46:31,689 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1273 transitions, 31906 flow [2023-01-27 20:46:31,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 134.03225806451613) internal successors, (4155), 31 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:31,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:46:31,689 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:46:31,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-01-27 20:46:31,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2023-01-27 20:46:31,893 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:46:31,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:46:31,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1919861316, now seen corresponding path program 22 times [2023-01-27 20:46:31,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:46:31,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825810970] [2023-01-27 20:46:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:46:31,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:46:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:46:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:32,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:46:32,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825810970] [2023-01-27 20:46:32,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825810970] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:46:32,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242891606] [2023-01-27 20:46:32,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:46:32,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:46:32,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:46:32,007 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:46:32,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-01-27 20:46:32,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:46:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:46:32,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 20:46:32,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:46:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:32,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:46:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:32,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242891606] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:46:32,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:46:32,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-01-27 20:46:32,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265608540] [2023-01-27 20:46:32,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:46:32,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 20:46:32,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:46:32,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 20:46:32,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-01-27 20:46:32,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 435 [2023-01-27 20:46:32,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1273 transitions, 31906 flow. Second operand has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:32,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:46:32,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 435 [2023-01-27 20:46:32,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:46:37,447 INFO L130 PetriNetUnfolder]: 8372/15139 cut-off events. [2023-01-27 20:46:37,447 INFO L131 PetriNetUnfolder]: For 400790/400790 co-relation queries the response was YES. [2023-01-27 20:46:37,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157792 conditions, 15139 events. 8372/15139 cut-off events. For 400790/400790 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 122768 event pairs, 1140 based on Foata normal form. 104/15243 useless extension candidates. Maximal degree in co-relation 157683. Up to 5050 conditions per place. [2023-01-27 20:46:37,620 INFO L137 encePairwiseOnDemand]: 426/435 looper letters, 963 selfloop transitions, 392 changer transitions 0/1355 dead transitions. [2023-01-27 20:46:37,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1355 transitions, 35114 flow [2023-01-27 20:46:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:46:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:46:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2295 transitions. [2023-01-27 20:46:37,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3768472906403941 [2023-01-27 20:46:37,622 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2295 transitions. [2023-01-27 20:46:37,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2295 transitions. [2023-01-27 20:46:37,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:46:37,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2295 transitions. [2023-01-27 20:46:37,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 163.92857142857142) internal successors, (2295), 14 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:37,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:37,627 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:37,627 INFO L175 Difference]: Start difference. First operand has 461 places, 1273 transitions, 31906 flow. Second operand 14 states and 2295 transitions. [2023-01-27 20:46:37,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1355 transitions, 35114 flow [2023-01-27 20:46:42,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1355 transitions, 33524 flow, removed 156 selfloop flow, removed 31 redundant places. [2023-01-27 20:46:43,028 INFO L231 Difference]: Finished difference. Result has 428 places, 1236 transitions, 30117 flow [2023-01-27 20:46:43,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=29333, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=844, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=30117, PETRI_PLACES=428, PETRI_TRANSITIONS=1236} [2023-01-27 20:46:43,029 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 403 predicate places. [2023-01-27 20:46:43,029 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 1236 transitions, 30117 flow [2023-01-27 20:46:43,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:43,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:46:43,029 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:46:43,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-01-27 20:46:43,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:46:43,234 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:46:43,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:46:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2036747440, now seen corresponding path program 1 times [2023-01-27 20:46:43,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:46:43,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121407381] [2023-01-27 20:46:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:46:43,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:46:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:46:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:43,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:46:43,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121407381] [2023-01-27 20:46:43,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121407381] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:46:43,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612671931] [2023-01-27 20:46:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:46:43,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:46:43,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:46:43,312 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:46:43,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-01-27 20:46:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:46:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 20:46:43,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:46:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:43,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:46:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 20:46:43,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612671931] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:46:43,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:46:43,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-01-27 20:46:43,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338726092] [2023-01-27 20:46:43,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:46:43,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 20:46:43,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:46:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 20:46:43,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-01-27 20:46:43,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 435 [2023-01-27 20:46:43,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1236 transitions, 30117 flow. Second operand has 16 states, 16 states have (on average 159.0625) internal successors, (2545), 16 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:43,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:46:43,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 435 [2023-01-27 20:46:43,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:46:46,144 INFO L130 PetriNetUnfolder]: 4134/7505 cut-off events. [2023-01-27 20:46:46,145 INFO L131 PetriNetUnfolder]: For 258451/258451 co-relation queries the response was YES. [2023-01-27 20:46:46,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88795 conditions, 7505 events. 4134/7505 cut-off events. For 258451/258451 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 52426 event pairs, 1186 based on Foata normal form. 272/7777 useless extension candidates. Maximal degree in co-relation 88698. Up to 5578 conditions per place. [2023-01-27 20:46:46,226 INFO L137 encePairwiseOnDemand]: 427/435 looper letters, 462 selfloop transitions, 9 changer transitions 516/987 dead transitions. [2023-01-27 20:46:46,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 987 transitions, 27003 flow [2023-01-27 20:46:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 20:46:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 20:46:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2755 transitions. [2023-01-27 20:46:46,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37254901960784315 [2023-01-27 20:46:46,228 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2755 transitions. [2023-01-27 20:46:46,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2755 transitions. [2023-01-27 20:46:46,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:46:46,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2755 transitions. [2023-01-27 20:46:46,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 162.05882352941177) internal successors, (2755), 17 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:46,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 435.0) internal successors, (7830), 18 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:46,233 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 435.0) internal successors, (7830), 18 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:46,233 INFO L175 Difference]: Start difference. First operand has 428 places, 1236 transitions, 30117 flow. Second operand 17 states and 2755 transitions. [2023-01-27 20:46:46,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 987 transitions, 27003 flow [2023-01-27 20:46:49,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 987 transitions, 26307 flow, removed 17 selfloop flow, removed 23 redundant places. [2023-01-27 20:46:49,018 INFO L231 Difference]: Finished difference. Result has 407 places, 471 transitions, 11356 flow [2023-01-27 20:46:49,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=22474, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=874, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=11356, PETRI_PLACES=407, PETRI_TRANSITIONS=471} [2023-01-27 20:46:49,019 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 382 predicate places. [2023-01-27 20:46:49,019 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 471 transitions, 11356 flow [2023-01-27 20:46:49,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 159.0625) internal successors, (2545), 16 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:49,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:46:49,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:46:49,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-01-27 20:46:49,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:46:49,225 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:46:49,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:46:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1086475321, now seen corresponding path program 23 times [2023-01-27 20:46:49,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:46:49,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973353824] [2023-01-27 20:46:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:46:49,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:46:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:46:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:46:49,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:46:49,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973353824] [2023-01-27 20:46:49,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973353824] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:46:49,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693517392] [2023-01-27 20:46:49,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 20:46:49,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:46:49,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:46:49,625 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:46:49,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-01-27 20:46:49,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 20:46:49,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:46:49,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 20:46:49,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:46:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:46:49,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:46:50,183 INFO L321 Elim1Store]: treesize reduction 35, result has 80.0 percent of original size [2023-01-27 20:46:50,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 165 [2023-01-27 20:46:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:46:50,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693517392] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:46:50,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:46:50,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 29 [2023-01-27 20:46:50,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186788037] [2023-01-27 20:46:50,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:46:50,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 20:46:50,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:46:50,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 20:46:50,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-01-27 20:46:50,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 435 [2023-01-27 20:46:50,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 471 transitions, 11356 flow. Second operand has 29 states, 29 states have (on average 132.93103448275863) internal successors, (3855), 29 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:50,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:46:50,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 435 [2023-01-27 20:46:50,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:46:52,188 INFO L130 PetriNetUnfolder]: 3887/6679 cut-off events. [2023-01-27 20:46:52,188 INFO L131 PetriNetUnfolder]: For 176735/176735 co-relation queries the response was YES. [2023-01-27 20:46:52,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72800 conditions, 6679 events. 3887/6679 cut-off events. For 176735/176735 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44828 event pairs, 328 based on Foata normal form. 64/6743 useless extension candidates. Maximal degree in co-relation 72713. Up to 2196 conditions per place. [2023-01-27 20:46:52,274 INFO L137 encePairwiseOnDemand]: 423/435 looper letters, 446 selfloop transitions, 199 changer transitions 0/645 dead transitions. [2023-01-27 20:46:52,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 645 transitions, 16078 flow [2023-01-27 20:46:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 20:46:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 20:46:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1929 transitions. [2023-01-27 20:46:52,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3167487684729064 [2023-01-27 20:46:52,276 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1929 transitions. [2023-01-27 20:46:52,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1929 transitions. [2023-01-27 20:46:52,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:46:52,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1929 transitions. [2023-01-27 20:46:52,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 137.78571428571428) internal successors, (1929), 14 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:52,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:52,280 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 435.0) internal successors, (6525), 15 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:52,280 INFO L175 Difference]: Start difference. First operand has 407 places, 471 transitions, 11356 flow. Second operand 14 states and 1929 transitions. [2023-01-27 20:46:52,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 645 transitions, 16078 flow [2023-01-27 20:46:53,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 645 transitions, 15012 flow, removed 75 selfloop flow, removed 42 redundant places. [2023-01-27 20:46:53,486 INFO L231 Difference]: Finished difference. Result has 248 places, 512 transitions, 11773 flow [2023-01-27 20:46:53,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=10446, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11773, PETRI_PLACES=248, PETRI_TRANSITIONS=512} [2023-01-27 20:46:53,486 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 223 predicate places. [2023-01-27 20:46:53,487 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 512 transitions, 11773 flow [2023-01-27 20:46:53,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 132.93103448275863) internal successors, (3855), 29 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:46:53,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:46:53,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:46:53,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-01-27 20:46:53,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:46:53,692 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:46:53,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:46:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1866905031, now seen corresponding path program 24 times [2023-01-27 20:46:53,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:46:53,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198339130] [2023-01-27 20:46:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:46:53,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:46:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:46:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:46:54,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:46:54,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198339130] [2023-01-27 20:46:54,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198339130] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:46:54,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707265567] [2023-01-27 20:46:54,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 20:46:54,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:46:54,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:46:54,098 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:46:54,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-01-27 20:46:54,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 20:46:54,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:46:54,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-27 20:46:54,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:46:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:46:54,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:46:54,824 INFO L321 Elim1Store]: treesize reduction 13, result has 93.4 percent of original size [2023-01-27 20:46:54,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 208 [2023-01-27 20:47:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:47:03,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707265567] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:47:03,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:47:03,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-01-27 20:47:03,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178143347] [2023-01-27 20:47:03,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:47:03,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 20:47:03,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:47:03,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 20:47:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-01-27 20:47:03,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 435 [2023-01-27 20:47:03,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 512 transitions, 11773 flow. Second operand has 30 states, 30 states have (on average 132.93333333333334) internal successors, (3988), 30 states have internal predecessors, (3988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:03,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:47:03,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 435 [2023-01-27 20:47:03,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:47:04,788 INFO L130 PetriNetUnfolder]: 3975/6831 cut-off events. [2023-01-27 20:47:04,788 INFO L131 PetriNetUnfolder]: For 116515/116515 co-relation queries the response was YES. [2023-01-27 20:47:04,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71358 conditions, 6831 events. 3975/6831 cut-off events. For 116515/116515 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45745 event pairs, 742 based on Foata normal form. 64/6894 useless extension candidates. Maximal degree in co-relation 71294. Up to 3334 conditions per place. [2023-01-27 20:47:04,857 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 411 selfloop transitions, 179 changer transitions 0/590 dead transitions. [2023-01-27 20:47:04,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 590 transitions, 14388 flow [2023-01-27 20:47:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:47:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:47:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2048 transitions. [2023-01-27 20:47:04,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31386973180076627 [2023-01-27 20:47:04,859 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2048 transitions. [2023-01-27 20:47:04,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2048 transitions. [2023-01-27 20:47:04,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:47:04,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2048 transitions. [2023-01-27 20:47:04,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 136.53333333333333) internal successors, (2048), 15 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:04,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:04,863 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:04,863 INFO L175 Difference]: Start difference. First operand has 248 places, 512 transitions, 11773 flow. Second operand 15 states and 2048 transitions. [2023-01-27 20:47:04,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 590 transitions, 14388 flow [2023-01-27 20:47:05,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 590 transitions, 14186 flow, removed 37 selfloop flow, removed 8 redundant places. [2023-01-27 20:47:05,697 INFO L231 Difference]: Finished difference. Result has 258 places, 521 transitions, 12226 flow [2023-01-27 20:47:05,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=11571, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12226, PETRI_PLACES=258, PETRI_TRANSITIONS=521} [2023-01-27 20:47:05,697 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 233 predicate places. [2023-01-27 20:47:05,697 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 521 transitions, 12226 flow [2023-01-27 20:47:05,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 132.93333333333334) internal successors, (3988), 30 states have internal predecessors, (3988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:05,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:47:05,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:47:05,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-01-27 20:47:05,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:47:05,903 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:47:05,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:47:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash -263726107, now seen corresponding path program 25 times [2023-01-27 20:47:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:47:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681159321] [2023-01-27 20:47:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:47:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:47:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:47:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:47:06,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:47:06,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681159321] [2023-01-27 20:47:06,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681159321] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:47:06,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352369788] [2023-01-27 20:47:06,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 20:47:06,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:47:06,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:47:06,333 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:47:06,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-01-27 20:47:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:47:06,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 20:47:06,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:47:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:47:06,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:47:07,048 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-01-27 20:47:07,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2023-01-27 20:47:07,060 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:47:07,060 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 16 treesize of output 4 [2023-01-27 20:47:07,065 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:47:07,065 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 16 treesize of output 4 [2023-01-27 20:47:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:47:07,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352369788] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:47:07,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:47:07,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 38 [2023-01-27 20:47:07,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075870301] [2023-01-27 20:47:07,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:47:07,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 20:47:07,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:47:07,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 20:47:07,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2023-01-27 20:47:07,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 435 [2023-01-27 20:47:07,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 521 transitions, 12226 flow. Second operand has 39 states, 39 states have (on average 132.5897435897436) internal successors, (5171), 39 states have internal predecessors, (5171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:07,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:47:07,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 435 [2023-01-27 20:47:07,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:47:09,071 INFO L130 PetriNetUnfolder]: 4127/7143 cut-off events. [2023-01-27 20:47:09,071 INFO L131 PetriNetUnfolder]: For 125811/125811 co-relation queries the response was YES. [2023-01-27 20:47:09,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75244 conditions, 7143 events. 4127/7143 cut-off events. For 125811/125811 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 48647 event pairs, 812 based on Foata normal form. 64/7207 useless extension candidates. Maximal degree in co-relation 75176. Up to 3646 conditions per place. [2023-01-27 20:47:09,146 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 421 selfloop transitions, 173 changer transitions 0/594 dead transitions. [2023-01-27 20:47:09,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 594 transitions, 14709 flow [2023-01-27 20:47:09,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:47:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:47:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2045 transitions. [2023-01-27 20:47:09,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31340996168582375 [2023-01-27 20:47:09,148 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2045 transitions. [2023-01-27 20:47:09,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2045 transitions. [2023-01-27 20:47:09,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:47:09,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2045 transitions. [2023-01-27 20:47:09,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 136.33333333333334) internal successors, (2045), 15 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:09,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:09,152 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:09,152 INFO L175 Difference]: Start difference. First operand has 258 places, 521 transitions, 12226 flow. Second operand 15 states and 2045 transitions. [2023-01-27 20:47:09,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 594 transitions, 14709 flow [2023-01-27 20:47:10,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 594 transitions, 14326 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-01-27 20:47:10,129 INFO L231 Difference]: Finished difference. Result has 263 places, 527 transitions, 12310 flow [2023-01-27 20:47:10,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=11849, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12310, PETRI_PLACES=263, PETRI_TRANSITIONS=527} [2023-01-27 20:47:10,129 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 238 predicate places. [2023-01-27 20:47:10,129 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 527 transitions, 12310 flow [2023-01-27 20:47:10,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 132.5897435897436) internal successors, (5171), 39 states have internal predecessors, (5171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:10,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:47:10,130 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:47:10,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-01-27 20:47:10,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:47:10,335 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:47:10,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:47:10,335 INFO L85 PathProgramCache]: Analyzing trace with hash -734693691, now seen corresponding path program 26 times [2023-01-27 20:47:10,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:47:10,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069943587] [2023-01-27 20:47:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:47:10,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:47:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:47:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:47:10,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:47:10,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069943587] [2023-01-27 20:47:10,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069943587] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:47:10,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496108578] [2023-01-27 20:47:10,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 20:47:10,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:47:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:47:10,737 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:47:10,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-01-27 20:47:10,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 20:47:10,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:47:10,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-27 20:47:10,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:47:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:47:11,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:47:11,496 INFO L321 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-01-27 20:47:11,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2023-01-27 20:47:11,506 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:47:11,507 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 16 treesize of output 4 [2023-01-27 20:47:11,511 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:47:11,511 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 16 treesize of output 4 [2023-01-27 20:47:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:47:11,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496108578] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:47:11,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:47:11,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 38 [2023-01-27 20:47:11,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067169001] [2023-01-27 20:47:11,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:47:11,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 20:47:11,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:47:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 20:47:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2023-01-27 20:47:11,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 435 [2023-01-27 20:47:11,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 527 transitions, 12310 flow. Second operand has 39 states, 39 states have (on average 132.5897435897436) internal successors, (5171), 39 states have internal predecessors, (5171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:11,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:47:11,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 435 [2023-01-27 20:47:11,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:47:13,479 INFO L130 PetriNetUnfolder]: 4095/7031 cut-off events. [2023-01-27 20:47:13,479 INFO L131 PetriNetUnfolder]: For 126865/126865 co-relation queries the response was YES. [2023-01-27 20:47:13,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74994 conditions, 7031 events. 4095/7031 cut-off events. For 126865/126865 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 47315 event pairs, 834 based on Foata normal form. 8/7039 useless extension candidates. Maximal degree in co-relation 74924. Up to 3742 conditions per place. [2023-01-27 20:47:13,550 INFO L137 encePairwiseOnDemand]: 422/435 looper letters, 405 selfloop transitions, 173 changer transitions 0/578 dead transitions. [2023-01-27 20:47:13,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 578 transitions, 14435 flow [2023-01-27 20:47:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 20:47:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 20:47:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2035 transitions. [2023-01-27 20:47:13,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118773946360153 [2023-01-27 20:47:13,552 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2035 transitions. [2023-01-27 20:47:13,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2035 transitions. [2023-01-27 20:47:13,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:47:13,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2035 transitions. [2023-01-27 20:47:13,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 135.66666666666666) internal successors, (2035), 15 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:13,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:13,556 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 435.0) internal successors, (6960), 16 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:13,556 INFO L175 Difference]: Start difference. First operand has 263 places, 527 transitions, 12310 flow. Second operand 15 states and 2035 transitions. [2023-01-27 20:47:13,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 578 transitions, 14435 flow [2023-01-27 20:47:14,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 578 transitions, 14064 flow, removed 15 selfloop flow, removed 12 redundant places. [2023-01-27 20:47:14,393 INFO L231 Difference]: Finished difference. Result has 266 places, 529 transitions, 12356 flow [2023-01-27 20:47:14,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=11921, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12356, PETRI_PLACES=266, PETRI_TRANSITIONS=529} [2023-01-27 20:47:14,393 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 241 predicate places. [2023-01-27 20:47:14,393 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 529 transitions, 12356 flow [2023-01-27 20:47:14,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 132.5897435897436) internal successors, (5171), 39 states have internal predecessors, (5171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:14,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:47:14,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:47:14,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-01-27 20:47:14,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:47:14,599 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:47:14,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:47:14,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1995781523, now seen corresponding path program 27 times [2023-01-27 20:47:14,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:47:14,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112304827] [2023-01-27 20:47:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:47:14,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:47:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:47:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:47:14,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:47:14,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112304827] [2023-01-27 20:47:14,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112304827] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:47:14,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353193992] [2023-01-27 20:47:14,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 20:47:14,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:47:14,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:47:14,988 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:47:14,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-01-27 20:47:15,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 20:47:15,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:47:15,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-27 20:47:15,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:47:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:47:15,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:47:16,058 INFO L321 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-01-27 20:47:16,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-01-27 20:47:16,077 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-01-27 20:47:16,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-01-27 20:47:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:47:16,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353193992] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:47:16,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:47:16,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 42 [2023-01-27 20:47:16,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586894664] [2023-01-27 20:47:16,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:47:16,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-27 20:47:16,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:47:16,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-27 20:47:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2023-01-27 20:47:16,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 435 [2023-01-27 20:47:16,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 529 transitions, 12356 flow. Second operand has 43 states, 43 states have (on average 115.55813953488372) internal successors, (4969), 43 states have internal predecessors, (4969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:16,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:47:16,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 435 [2023-01-27 20:47:16,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 20:47:25,866 INFO L130 PetriNetUnfolder]: 8393/14539 cut-off events. [2023-01-27 20:47:25,866 INFO L131 PetriNetUnfolder]: For 251464/251464 co-relation queries the response was YES. [2023-01-27 20:47:26,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150654 conditions, 14539 events. 8393/14539 cut-off events. For 251464/251464 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 112745 event pairs, 495 based on Foata normal form. 168/14707 useless extension candidates. Maximal degree in co-relation 150583. Up to 4107 conditions per place. [2023-01-27 20:47:26,128 INFO L137 encePairwiseOnDemand]: 418/435 looper letters, 635 selfloop transitions, 927 changer transitions 6/1568 dead transitions. [2023-01-27 20:47:26,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1568 transitions, 34394 flow [2023-01-27 20:47:26,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-01-27 20:47:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-01-27 20:47:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 10438 transitions. [2023-01-27 20:47:26,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2758092218258687 [2023-01-27 20:47:26,134 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 10438 transitions. [2023-01-27 20:47:26,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 10438 transitions. [2023-01-27 20:47:26,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 20:47:26,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 10438 transitions. [2023-01-27 20:47:26,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 119.97701149425288) internal successors, (10438), 87 states have internal predecessors, (10438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:26,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 435.0) internal successors, (38280), 88 states have internal predecessors, (38280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:26,162 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 435.0) internal successors, (38280), 88 states have internal predecessors, (38280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:26,162 INFO L175 Difference]: Start difference. First operand has 266 places, 529 transitions, 12356 flow. Second operand 87 states and 10438 transitions. [2023-01-27 20:47:26,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1568 transitions, 34394 flow [2023-01-27 20:47:29,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1568 transitions, 33640 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-01-27 20:47:29,118 INFO L231 Difference]: Finished difference. Result has 379 places, 1175 transitions, 29499 flow [2023-01-27 20:47:29,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=435, PETRI_DIFFERENCE_MINUEND_FLOW=12014, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=29499, PETRI_PLACES=379, PETRI_TRANSITIONS=1175} [2023-01-27 20:47:29,119 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 354 predicate places. [2023-01-27 20:47:29,119 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1175 transitions, 29499 flow [2023-01-27 20:47:29,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 115.55813953488372) internal successors, (4969), 43 states have internal predecessors, (4969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:29,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 20:47:29,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 20:47:29,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-01-27 20:47:29,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2023-01-27 20:47:29,323 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 20:47:29,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 20:47:29,324 INFO L85 PathProgramCache]: Analyzing trace with hash 73595751, now seen corresponding path program 28 times [2023-01-27 20:47:29,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 20:47:29,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620282637] [2023-01-27 20:47:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 20:47:29,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 20:47:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 20:47:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 20:47:29,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 20:47:29,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620282637] [2023-01-27 20:47:29,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620282637] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 20:47:29,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095416737] [2023-01-27 20:47:29,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 20:47:29,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 20:47:29,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 20:47:29,733 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 20:47:29,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-01-27 20:47:29,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 20:47:29,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 20:47:29,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-27 20:47:29,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 20:47:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 20:47:30,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 20:47:30,465 INFO L321 Elim1Store]: treesize reduction 15, result has 93.1 percent of original size [2023-01-27 20:47:30,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 232 [2023-01-27 20:47:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 20:47:31,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095416737] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 20:47:31,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 20:47:31,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 31 [2023-01-27 20:47:31,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930658918] [2023-01-27 20:47:31,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 20:47:31,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 20:47:31,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 20:47:31,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 20:47:31,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2023-01-27 20:47:31,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 435 [2023-01-27 20:47:31,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1175 transitions, 29499 flow. Second operand has 31 states, 31 states have (on average 133.09677419354838) internal successors, (4126), 31 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 20:47:31,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 20:47:31,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 435 [2023-01-27 20:47:31,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand