/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-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/fork_multiple_parameter.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 07:54:38,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 07:54:38,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 07:54:38,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 07:54:38,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 07:54:38,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 07:54:38,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 07:54:38,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 07:54:38,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 07:54:38,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 07:54:38,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 07:54:38,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 07:54:38,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 07:54:38,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 07:54:38,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 07:54:38,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 07:54:38,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 07:54:38,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 07:54:38,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 07:54:38,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 07:54:38,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 07:54:38,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 07:54:38,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 07:54:38,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 07:54:38,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-25 07:54:38,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 07:54:38,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 07:54:38,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 07:54:38,744 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-RepeatedVariableLbe.epf [2021-03-25 07:54:38,778 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 07:54:38,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 07:54:38,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 07:54:38,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 07:54:38,782 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 07:54:38,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 07:54:38,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 07:54:38,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 07:54:38,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 07:54:38,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 07:54:38,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 07:54:38,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 07:54:38,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 07:54:38,784 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 07:54:38,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 07:54:38,784 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 07:54:38,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 07:54:38,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 07:54:38,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 07:54:38,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 07:54:38,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 07:54:38,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 07:54:38,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 07:54:38,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 07:54:38,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 07:54:38,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 07:54:38,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 07:54:38,786 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 07:54:38,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 07:54:38,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 07:54:38,786 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 07:54:39,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 07:54:39,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 07:54:39,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 07:54:39,101 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 07:54:39,102 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 07:54:39,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_multiple_parameter.bpl [2021-03-25 07:54:39,103 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_multiple_parameter.bpl' [2021-03-25 07:54:39,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 07:54:39,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 07:54:39,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:39,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 07:54:39,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 07:54:39,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/1) ... [2021-03-25 07:54:39,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/1) ... [2021-03-25 07:54:39,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:39,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 07:54:39,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 07:54:39,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 07:54:39,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/1) ... [2021-03-25 07:54:39,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/1) ... [2021-03-25 07:54:39,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/1) ... [2021-03-25 07:54:39,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/1) ... [2021-03-25 07:54:39,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/1) ... [2021-03-25 07:54:39,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/1) ... [2021-03-25 07:54:39,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/1) ... [2021-03-25 07:54:39,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 07:54:39,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 07:54:39,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 07:54:39,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 07:54:39,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 07:54:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure add [2021-03-25 07:54:39,222 INFO L138 BoogieDeclarations]: Found implementation of procedure add [2021-03-25 07:54:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 07:54:39,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 07:54:39,223 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 07:54:39,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 07:54:39,316 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 07:54:39,317 INFO L202 PluginConnector]: Adding new model fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:39 BoogieIcfgContainer [2021-03-25 07:54:39,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 07:54:39,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 07:54:39,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 07:54:39,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 07:54:39,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:39" (1/2) ... [2021-03-25 07:54:39,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29da4df3 and model type fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 07:54:39, skipping insertion in model container [2021-03-25 07:54:39,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:39" (2/2) ... [2021-03-25 07:54:39,335 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_multiple_parameter.bpl [2021-03-25 07:54:39,344 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 07:54:39,347 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-25 07:54:39,348 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 07:54:39,376 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,377 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,377 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,377 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,379 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,380 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,381 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_sum not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,382 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,382 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_num2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,382 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_sum not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,386 WARN L313 ript$VariableManager]: TermVariabe addThread1of1ForFork0_sum not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:39,395 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-03-25 07:54:39,410 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-25 07:54:39,447 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 07:54:39,447 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 07:54:39,447 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 07:54:39,447 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 07:54:39,447 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 07:54:39,447 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 07:54:39,447 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 07:54:39,447 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 07:54:39,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 17 places, 13 transitions, 34 flow [2021-03-25 07:54:39,476 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-25 07:54:39,476 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:39,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 12 events. 0/12 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 4 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 07:54:39,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 17 places, 13 transitions, 34 flow [2021-03-25 07:54:39,481 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 10 transitions, 26 flow [2021-03-25 07:54:39,482 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:39,490 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 14 places, 10 transitions, 26 flow [2021-03-25 07:54:39,494 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 14 places, 10 transitions, 26 flow [2021-03-25 07:54:39,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 14 places, 10 transitions, 26 flow [2021-03-25 07:54:39,503 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-25 07:54:39,503 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:39,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 10 events. 0/10 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 3 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 07:54:39,505 INFO L142 LiptonReduction]: Number of co-enabled transitions 8 [2021-03-25 07:54:39,583 INFO L154 LiptonReduction]: Checked pairs total: 2 [2021-03-25 07:54:39,583 INFO L156 LiptonReduction]: Total number of compositions: 3 [2021-03-25 07:54:39,585 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 104 [2021-03-25 07:54:39,591 INFO L129 PetriNetUnfolder]: 0/3 cut-off events. [2021-03-25 07:54:39,591 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:39,591 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:39,592 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2021-03-25 07:54:39,592 INFO L428 AbstractCegarLoop]: === Iteration 1 === [addErr0ASSERT_VIOLATIONASSERT, addErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:39,596 INFO L82 PathProgramCache]: Analyzing trace with hash 60505, now seen corresponding path program 1 times [2021-03-25 07:54:39,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:39,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599424646] [2021-03-25 07:54:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:39,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:39,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:39,728 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-25 07:54:39,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:39,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599424646] [2021-03-25 07:54:39,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:39,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-25 07:54:39,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748797826] [2021-03-25 07:54:39,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-25 07:54:39,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:39,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-25 07:54:39,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-25 07:54:39,770 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 16 [2021-03-25 07:54:39,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 7 transitions, 20 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:39,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:39,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 16 [2021-03-25 07:54:39,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:39,813 INFO L129 PetriNetUnfolder]: 1/8 cut-off events. [2021-03-25 07:54:39,814 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:39,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 8 events. 1/8 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 0/8 useless extension candidates. Maximal degree in co-relation 8. Up to 4 conditions per place. [2021-03-25 07:54:39,816 INFO L132 encePairwiseOnDemand]: 12/16 looper letters, 3 selfloop transitions, 3 changer transitions 0/7 dead transitions. [2021-03-25 07:54:39,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 7 transitions, 32 flow [2021-03-25 07:54:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 07:54:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 07:54:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 33 transitions. [2021-03-25 07:54:39,825 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.4125 [2021-03-25 07:54:39,825 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 33 transitions. [2021-03-25 07:54:39,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 33 transitions. [2021-03-25 07:54:39,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:39,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 33 transitions. [2021-03-25 07:54:39,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:39,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:39,833 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:39,834 INFO L185 Difference]: Start difference. First operand has 11 places, 7 transitions, 20 flow. Second operand 5 states and 33 transitions. [2021-03-25 07:54:39,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 7 transitions, 32 flow [2021-03-25 07:54:39,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 28 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-25 07:54:39,838 INFO L241 Difference]: Finished difference. Result has 12 places, 6 transitions, 20 flow [2021-03-25 07:54:39,839 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=8, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2021-03-25 07:54:39,840 INFO L343 CegarLoopForPetriNet]: 11 programPoint places, 1 predicate places. [2021-03-25 07:54:39,840 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:39,840 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 12 places, 6 transitions, 20 flow [2021-03-25 07:54:39,840 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 12 places, 6 transitions, 20 flow [2021-03-25 07:54:39,841 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 12 places, 6 transitions, 20 flow [2021-03-25 07:54:39,843 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-25 07:54:39,843 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:39,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12 conditions, 6 events. 0/6 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 0/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-25 07:54:39,843 INFO L142 LiptonReduction]: Number of co-enabled transitions 2 [2021-03-25 07:54:39,844 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:39,844 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:39,844 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-03-25 07:54:39,845 INFO L480 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 20 flow [2021-03-25 07:54:39,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:39,845 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:39,845 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 07:54:39,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 07:54:39,845 INFO L428 AbstractCegarLoop]: === Iteration 2 === [addErr0ASSERT_VIOLATIONASSERT, addErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:39,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1802787937, now seen corresponding path program 1 times [2021-03-25 07:54:39,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:39,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667316891] [2021-03-25 07:54:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:39,868 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:39,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:39,875 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:39,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:39,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:39,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:39,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:39,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:39,903 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-25 07:54:39,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:54:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:39,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667316891] [2021-03-25 07:54:39,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:39,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 07:54:39,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543680763] [2021-03-25 07:54:39,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 07:54:39,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:39,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 07:54:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-25 07:54:39,917 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 16 [2021-03-25 07:54:39,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 6 transitions, 20 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:39,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:39,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 16 [2021-03-25 07:54:39,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:40,062 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-25 07:54:40,062 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:40,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 9 events. 0/9 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 1/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-25 07:54:40,063 INFO L132 encePairwiseOnDemand]: 10/16 looper letters, 2 selfloop transitions, 4 changer transitions 2/8 dead transitions. [2021-03-25 07:54:40,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 8 transitions, 43 flow [2021-03-25 07:54:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-25 07:54:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-25 07:54:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 49 transitions. [2021-03-25 07:54:40,067 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2021-03-25 07:54:40,067 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 49 transitions. [2021-03-25 07:54:40,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 49 transitions. [2021-03-25 07:54:40,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:40,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 49 transitions. [2021-03-25 07:54:40,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:40,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:40,072 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:40,072 INFO L185 Difference]: Start difference. First operand has 12 places, 6 transitions, 20 flow. Second operand 8 states and 49 transitions. [2021-03-25 07:54:40,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 8 transitions, 43 flow [2021-03-25 07:54:40,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 8 transitions, 37 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-25 07:54:40,075 INFO L241 Difference]: Finished difference. Result has 18 places, 6 transitions, 29 flow [2021-03-25 07:54:40,075 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=15, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=29, PETRI_PLACES=18, PETRI_TRANSITIONS=6} [2021-03-25 07:54:40,076 INFO L343 CegarLoopForPetriNet]: 11 programPoint places, 7 predicate places. [2021-03-25 07:54:40,077 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:40,077 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 18 places, 6 transitions, 29 flow [2021-03-25 07:54:40,077 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 18 places, 6 transitions, 29 flow [2021-03-25 07:54:40,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 6 transitions, 29 flow [2021-03-25 07:54:40,081 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-25 07:54:40,081 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:40,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 7 events. 0/7 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 07:54:40,082 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 07:54:40,083 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:40,083 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:40,084 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 8 [2021-03-25 07:54:40,085 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 6 transitions, 29 flow [2021-03-25 07:54:40,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:40,086 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:40,086 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 07:54:40,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 07:54:40,086 INFO L428 AbstractCegarLoop]: === Iteration 3 === [addErr0ASSERT_VIOLATIONASSERT, addErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:40,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:40,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1802268997, now seen corresponding path program 2 times [2021-03-25 07:54:40,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:40,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201943072] [2021-03-25 07:54:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:40,129 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:40,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:40,143 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:40,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:40,150 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:40,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-03-25 07:54:40,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:40,160 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:40,170 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-25 07:54:40,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:54:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:40,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201943072] [2021-03-25 07:54:40,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:40,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 07:54:40,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534566710] [2021-03-25 07:54:40,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 07:54:40,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:40,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 07:54:40,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-25 07:54:40,183 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 16 [2021-03-25 07:54:40,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 6 transitions, 29 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:40,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:40,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 16 [2021-03-25 07:54:40,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:40,257 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-25 07:54:40,257 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:40,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 6 events. 0/6 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 1/7 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 07:54:40,257 INFO L132 encePairwiseOnDemand]: 10/16 looper letters, 0 selfloop transitions, 0 changer transitions 6/6 dead transitions. [2021-03-25 07:54:40,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 6 transitions, 42 flow [2021-03-25 07:54:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 07:54:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 07:54:40,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 42 transitions. [2021-03-25 07:54:40,259 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.375 [2021-03-25 07:54:40,259 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 42 transitions. [2021-03-25 07:54:40,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 42 transitions. [2021-03-25 07:54:40,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:40,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 42 transitions. [2021-03-25 07:54:40,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:40,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:40,260 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:40,261 INFO L185 Difference]: Start difference. First operand has 16 places, 6 transitions, 29 flow. Second operand 7 states and 42 transitions. [2021-03-25 07:54:40,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 6 transitions, 42 flow [2021-03-25 07:54:40,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 6 transitions, 33 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-25 07:54:40,262 INFO L241 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2021-03-25 07:54:40,262 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=16, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2021-03-25 07:54:40,262 INFO L343 CegarLoopForPetriNet]: 11 programPoint places, 6 predicate places. [2021-03-25 07:54:40,262 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:40,262 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 17 places, 0 transitions, 0 flow [2021-03-25 07:54:40,263 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 17 places, 0 transitions, 0 flow [2021-03-25 07:54:40,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 07:54:40,263 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 07:54:40,263 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:40,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-03-25 07:54:40,263 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 07:54:40,264 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:40,264 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:40,264 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 07:54:40,265 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 07:54:40,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:54:40,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 07:54:40,268 INFO L202 PluginConnector]: Adding new model fork_multiple_parameter.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 07:54:40 BasicIcfg [2021-03-25 07:54:40,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 07:54:40,269 INFO L168 Benchmark]: Toolchain (without parser) took 1137.99 ms. Allocated memory was 255.9 MB in the beginning and 385.9 MB in the end (delta: 130.0 MB). Free memory was 236.9 MB in the beginning and 338.6 MB in the end (delta: -101.8 MB). Peak memory consumption was 28.6 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:40,270 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.46 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:40,270 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.02 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:40,270 INFO L168 Benchmark]: Boogie Preprocessor took 9.76 ms. Allocated memory is still 255.9 MB. Free memory was 235.2 MB in the beginning and 234.5 MB in the end (delta: 684.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:40,271 INFO L168 Benchmark]: RCFGBuilder took 152.02 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 226.4 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:40,272 INFO L168 Benchmark]: TraceAbstraction took 950.26 ms. Allocated memory was 255.9 MB in the beginning and 385.9 MB in the end (delta: 130.0 MB). Free memory was 225.8 MB in the beginning and 338.6 MB in the end (delta: -112.8 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:40,273 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.46 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.02 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.76 ms. Allocated memory is still 255.9 MB. Free memory was 235.2 MB in the beginning and 234.5 MB in the end (delta: 684.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 152.02 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 226.4 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 950.26 ms. Allocated memory was 255.9 MB in the beginning and 385.9 MB in the end (delta: 130.0 MB). Free memory was 225.8 MB in the beginning and 338.6 MB in the end (delta: -112.8 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 88.9ms, 14 PlacesBefore, 11 PlacesAfterwards, 10 TransitionsBefore, 7 TransitionsAfterwards, 8 CoEnabledTransitionPairs, 3 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 2 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2, unknown conditional: 0, unknown unconditional: 2] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4ms, 12 PlacesBefore, 12 PlacesAfterwards, 6 TransitionsBefore, 6 TransitionsAfterwards, 2 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.2ms, 18 PlacesBefore, 16 PlacesAfterwards, 6 TransitionsBefore, 6 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2ms, 17 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 32]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 25]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 829.0ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 319.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 141.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9 SDtfs, 20 SDslu, 5 SDs, 0 SdLazy, 43 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 259.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=2, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.1ms SsaConstructionTime, 37.6ms SatisfiabilityAnalysisTime, 206.0ms InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 92 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...