/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/NonAtomicIncrement_2Threads.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 22:34:45,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 22:34:45,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 22:34:45,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 22:34:45,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 22:34:45,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 22:34:45,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 22:34:45,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 22:34:45,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 22:34:45,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 22:34:45,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 22:34:45,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 22:34:45,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 22:34:45,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 22:34:45,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 22:34:45,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 22:34:45,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 22:34:45,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 22:34:45,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 22:34:45,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 22:34:45,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 22:34:45,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 22:34:45,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 22:34:45,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 22:34:45,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 22:34:45,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 22:34:45,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 22:34:45,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 22:34:45,164 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-SemanticLbe.epf [2021-03-11 22:34:45,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 22:34:45,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 22:34:45,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 22:34:45,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 22:34:45,202 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 22:34:45,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 22:34:45,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 22:34:45,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 22:34:45,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 22:34:45,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 22:34:45,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 22:34:45,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 22:34:45,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 22:34:45,204 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 22:34:45,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 22:34:45,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 22:34:45,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 22:34:45,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 22:34:45,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 22:34:45,205 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 22:34:45,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 22:34:45,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:34:45,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 22:34:45,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 22:34:45,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 22:34:45,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 22:34:45,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 22:34:45,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 22:34:45,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 22:34:45,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 22:34:45,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 22:34:45,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 22:34:45,537 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 22:34:45,538 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 22:34:45,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/NonAtomicIncrement_2Threads.bpl [2021-03-11 22:34:45,539 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/NonAtomicIncrement_2Threads.bpl' [2021-03-11 22:34:45,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 22:34:45,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 22:34:45,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 22:34:45,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 22:34:45,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 22:34:45,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (1/1) ... [2021-03-11 22:34:45,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (1/1) ... [2021-03-11 22:34:45,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 22:34:45,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 22:34:45,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 22:34:45,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 22:34:45,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (1/1) ... [2021-03-11 22:34:45,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (1/1) ... [2021-03-11 22:34:45,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (1/1) ... [2021-03-11 22:34:45,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (1/1) ... [2021-03-11 22:34:45,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (1/1) ... [2021-03-11 22:34:45,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (1/1) ... [2021-03-11 22:34:45,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (1/1) ... [2021-03-11 22:34:45,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 22:34:45,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 22:34:45,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 22:34:45,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 22:34:45,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (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 [2021-03-11 22:34:45,679 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 22:34:45,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 22:34:45,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 22:34:45,679 INFO L124 BoogieDeclarations]: Specification and implementation of procedure IncrementProcess1 given in one single declaration [2021-03-11 22:34:45,679 INFO L130 BoogieDeclarations]: Found specification of procedure IncrementProcess1 [2021-03-11 22:34:45,679 INFO L138 BoogieDeclarations]: Found implementation of procedure IncrementProcess1 [2021-03-11 22:34:45,679 INFO L124 BoogieDeclarations]: Specification and implementation of procedure IncrementProcess2 given in one single declaration [2021-03-11 22:34:45,680 INFO L130 BoogieDeclarations]: Found specification of procedure IncrementProcess2 [2021-03-11 22:34:45,680 INFO L138 BoogieDeclarations]: Found implementation of procedure IncrementProcess2 [2021-03-11 22:34:45,680 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 22:34:45,812 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 22:34:45,812 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 22:34:45,814 INFO L202 PluginConnector]: Adding new model NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:34:45 BoogieIcfgContainer [2021-03-11 22:34:45,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 22:34:45,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 22:34:45,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 22:34:45,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 22:34:45,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:45" (1/2) ... [2021-03-11 22:34:45,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467a26d5 and model type NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 10:34:45, skipping insertion in model container [2021-03-11 22:34:45,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:34:45" (2/2) ... [2021-03-11 22:34:45,819 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.bpl [2021-03-11 22:34:45,824 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 22:34:45,826 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 22:34:45,827 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 22:34:45,843 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,843 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,843 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,844 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,844 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,844 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,844 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,844 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,844 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,845 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,845 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,845 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,845 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,846 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,846 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,846 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,846 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,846 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,847 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,847 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,847 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,847 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,847 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,847 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,849 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess1Thread1of1ForFork0_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,852 WARN L313 ript$VariableManager]: TermVariabe IncrementProcess2Thread1of1ForFork1_localx not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:45,858 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-11 22:34:45,873 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 22:34:45,893 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:34:45,893 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:34:45,893 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:34:45,893 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:34:45,894 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:34:45,894 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:34:45,894 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:34:45,894 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:34:45,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 74 flow [2021-03-11 22:34:45,921 INFO L129 PetriNetUnfolder]: 1/24 cut-off events. [2021-03-11 22:34:45,922 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 22:34:45,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 24 events. 1/24 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2021-03-11 22:34:45,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 74 flow [2021-03-11 22:34:45,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 22 transitions, 62 flow [2021-03-11 22:34:45,931 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:34:45,939 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 22 transitions, 62 flow [2021-03-11 22:34:45,941 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 22 transitions, 62 flow [2021-03-11 22:34:45,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 62 flow [2021-03-11 22:34:45,949 INFO L129 PetriNetUnfolder]: 1/22 cut-off events. [2021-03-11 22:34:45,949 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 22:34:45,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 22 events. 1/22 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 18 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 9. Up to 3 conditions per place. [2021-03-11 22:34:45,950 INFO L116 LiptonReduction]: Number of co-enabled transitions 140 [2021-03-11 22:34:46,105 INFO L131 LiptonReduction]: Checked pairs total: 430 [2021-03-11 22:34:46,105 INFO L133 LiptonReduction]: Total number of compositions: 2 [2021-03-11 22:34:46,106 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 179 [2021-03-11 22:34:46,123 INFO L129 PetriNetUnfolder]: 1/19 cut-off events. [2021-03-11 22:34:46,123 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 22:34:46,123 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:46,124 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:34:46,124 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:34:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:46,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1521083955, now seen corresponding path program 1 times [2021-03-11 22:34:46,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:46,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340858163] [2021-03-11 22:34:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:34:46,272 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,402 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,412 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,413 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:34:46,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340858163] [2021-03-11 22:34:46,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:34:46,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-03-11 22:34:46,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671980197] [2021-03-11 22:34:46,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 22:34:46,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:34:46,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 22:34:46,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-11 22:34:46,463 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-11 22:34:46,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 58 flow. Second operand has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 15 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:46,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:34:46,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-11 22:34:46,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:34:46,914 INFO L129 PetriNetUnfolder]: 79/236 cut-off events. [2021-03-11 22:34:46,915 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2021-03-11 22:34:46,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 236 events. 79/236 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1080 event pairs, 25 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 428. Up to 81 conditions per place. [2021-03-11 22:34:46,921 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 41 selfloop transitions, 27 changer transitions 14/86 dead transitions. [2021-03-11 22:34:46,921 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 86 transitions, 357 flow [2021-03-11 22:34:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 22:34:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-03-11 22:34:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 248 transitions. [2021-03-11 22:34:46,933 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2021-03-11 22:34:46,933 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 248 transitions. [2021-03-11 22:34:46,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 248 transitions. [2021-03-11 22:34:46,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:34:46,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 248 transitions. [2021-03-11 22:34:46,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 13.777777777777779) internal successors, (248), 18 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:46,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 28.0) internal successors, (532), 19 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:46,945 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 28.0) internal successors, (532), 19 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:46,946 INFO L185 Difference]: Start difference. First operand has 25 places, 20 transitions, 58 flow. Second operand 18 states and 248 transitions. [2021-03-11 22:34:46,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 86 transitions, 357 flow [2021-03-11 22:34:46,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 86 transitions, 343 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-11 22:34:46,954 INFO L241 Difference]: Finished difference. Result has 50 places, 48 transitions, 240 flow [2021-03-11 22:34:46,955 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=240, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2021-03-11 22:34:46,956 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2021-03-11 22:34:46,956 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 240 flow [2021-03-11 22:34:46,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 10.066666666666666) internal successors, (151), 15 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:46,957 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:46,957 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:34:46,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 22:34:46,957 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:34:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1403402659, now seen corresponding path program 2 times [2021-03-11 22:34:46,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:46,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316771030] [2021-03-11 22:34:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:34:46,983 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,990 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:46,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:46,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,025 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:34:47,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316771030] [2021-03-11 22:34:47,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:34:47,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-03-11 22:34:47,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619916061] [2021-03-11 22:34:47,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 22:34:47,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:34:47,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 22:34:47,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 22:34:47,037 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-11 22:34:47,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 240 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:34:47,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-11 22:34:47,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:34:47,381 INFO L129 PetriNetUnfolder]: 142/452 cut-off events. [2021-03-11 22:34:47,382 INFO L130 PetriNetUnfolder]: For 1463/1463 co-relation queries the response was YES. [2021-03-11 22:34:47,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 452 events. 142/452 cut-off events. For 1463/1463 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2823 event pairs, 12 based on Foata normal form. 2/454 useless extension candidates. Maximal degree in co-relation 1648. Up to 138 conditions per place. [2021-03-11 22:34:47,390 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 75 selfloop transitions, 47 changer transitions 3/129 dead transitions. [2021-03-11 22:34:47,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 129 transitions, 1049 flow [2021-03-11 22:34:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 22:34:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-03-11 22:34:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 217 transitions. [2021-03-11 22:34:47,394 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2021-03-11 22:34:47,394 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 217 transitions. [2021-03-11 22:34:47,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 217 transitions. [2021-03-11 22:34:47,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:34:47,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 217 transitions. [2021-03-11 22:34:47,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.5) internal successors, (217), 14 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,415 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,415 INFO L185 Difference]: Start difference. First operand has 50 places, 48 transitions, 240 flow. Second operand 14 states and 217 transitions. [2021-03-11 22:34:47,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 129 transitions, 1049 flow [2021-03-11 22:34:47,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 129 transitions, 891 flow, removed 79 selfloop flow, removed 6 redundant places. [2021-03-11 22:34:47,426 INFO L241 Difference]: Finished difference. Result has 59 places, 91 transitions, 664 flow [2021-03-11 22:34:47,426 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=664, PETRI_PLACES=59, PETRI_TRANSITIONS=91} [2021-03-11 22:34:47,426 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2021-03-11 22:34:47,426 INFO L480 AbstractCegarLoop]: Abstraction has has 59 places, 91 transitions, 664 flow [2021-03-11 22:34:47,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,427 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:47,427 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:34:47,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 22:34:47,427 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:34:47,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:47,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1259974901, now seen corresponding path program 3 times [2021-03-11 22:34:47,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:47,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494201957] [2021-03-11 22:34:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:34:47,454 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,461 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,462 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,474 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,479 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,479 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,484 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,493 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,494 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:34:47,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494201957] [2021-03-11 22:34:47,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:34:47,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 22:34:47,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388260765] [2021-03-11 22:34:47,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 22:34:47,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:34:47,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 22:34:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-11 22:34:47,507 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 28 [2021-03-11 22:34:47,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 91 transitions, 664 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:34:47,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 28 [2021-03-11 22:34:47,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:34:47,701 INFO L129 PetriNetUnfolder]: 161/554 cut-off events. [2021-03-11 22:34:47,701 INFO L130 PetriNetUnfolder]: For 2298/2298 co-relation queries the response was YES. [2021-03-11 22:34:47,703 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2428 conditions, 554 events. 161/554 cut-off events. For 2298/2298 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3927 event pairs, 13 based on Foata normal form. 4/558 useless extension candidates. Maximal degree in co-relation 2260. Up to 236 conditions per place. [2021-03-11 22:34:47,706 INFO L132 encePairwiseOnDemand]: 17/28 looper letters, 102 selfloop transitions, 53 changer transitions 35/195 dead transitions. [2021-03-11 22:34:47,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 195 transitions, 1818 flow [2021-03-11 22:34:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 22:34:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-03-11 22:34:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2021-03-11 22:34:47,708 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2021-03-11 22:34:47,708 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 192 transitions. [2021-03-11 22:34:47,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 192 transitions. [2021-03-11 22:34:47,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:34:47,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 192 transitions. [2021-03-11 22:34:47,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 16.0) internal successors, (192), 12 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,710 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,710 INFO L185 Difference]: Start difference. First operand has 59 places, 91 transitions, 664 flow. Second operand 12 states and 192 transitions. [2021-03-11 22:34:47,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 195 transitions, 1818 flow [2021-03-11 22:34:47,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 195 transitions, 1654 flow, removed 80 selfloop flow, removed 1 redundant places. [2021-03-11 22:34:47,728 INFO L241 Difference]: Finished difference. Result has 75 places, 118 transitions, 1006 flow [2021-03-11 22:34:47,728 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1006, PETRI_PLACES=75, PETRI_TRANSITIONS=118} [2021-03-11 22:34:47,729 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 50 predicate places. [2021-03-11 22:34:47,729 INFO L480 AbstractCegarLoop]: Abstraction has has 75 places, 118 transitions, 1006 flow [2021-03-11 22:34:47,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,729 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:47,729 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:34:47,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 22:34:47,729 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:34:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:47,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1197944797, now seen corresponding path program 4 times [2021-03-11 22:34:47,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:47,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178613748] [2021-03-11 22:34:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:34:47,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,752 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,759 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,763 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,763 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,768 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:47,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:34:47,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178613748] [2021-03-11 22:34:47,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:34:47,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 22:34:47,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542645536] [2021-03-11 22:34:47,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 22:34:47,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:34:47,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 22:34:47,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-11 22:34:47,781 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-11 22:34:47,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 118 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:47,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:34:47,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-11 22:34:47,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:34:48,032 INFO L129 PetriNetUnfolder]: 159/596 cut-off events. [2021-03-11 22:34:48,033 INFO L130 PetriNetUnfolder]: For 3053/3053 co-relation queries the response was YES. [2021-03-11 22:34:48,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2789 conditions, 596 events. 159/596 cut-off events. For 3053/3053 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4406 event pairs, 23 based on Foata normal form. 2/598 useless extension candidates. Maximal degree in co-relation 2514. Up to 236 conditions per place. [2021-03-11 22:34:48,037 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 98 selfloop transitions, 55 changer transitions 22/179 dead transitions. [2021-03-11 22:34:48,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 179 transitions, 1796 flow [2021-03-11 22:34:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 22:34:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-03-11 22:34:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2021-03-11 22:34:48,039 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2021-03-11 22:34:48,039 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 173 transitions. [2021-03-11 22:34:48,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 173 transitions. [2021-03-11 22:34:48,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:34:48,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 173 transitions. [2021-03-11 22:34:48,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 15.727272727272727) internal successors, (173), 11 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:48,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:48,041 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:48,041 INFO L185 Difference]: Start difference. First operand has 75 places, 118 transitions, 1006 flow. Second operand 11 states and 173 transitions. [2021-03-11 22:34:48,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 179 transitions, 1796 flow [2021-03-11 22:34:48,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 179 transitions, 1737 flow, removed 26 selfloop flow, removed 2 redundant places. [2021-03-11 22:34:48,062 INFO L241 Difference]: Finished difference. Result has 87 places, 123 transitions, 1183 flow [2021-03-11 22:34:48,063 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1183, PETRI_PLACES=87, PETRI_TRANSITIONS=123} [2021-03-11 22:34:48,063 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 62 predicate places. [2021-03-11 22:34:48,063 INFO L480 AbstractCegarLoop]: Abstraction has has 87 places, 123 transitions, 1183 flow [2021-03-11 22:34:48,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:48,063 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:48,063 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:34:48,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 22:34:48,064 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:34:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:48,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1084271377, now seen corresponding path program 5 times [2021-03-11 22:34:48,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:48,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625105367] [2021-03-11 22:34:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:34:48,081 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,082 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,088 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,095 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,101 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,101 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,128 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,129 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:48,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:34:48,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625105367] [2021-03-11 22:34:48,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:34:48,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-03-11 22:34:48,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164210436] [2021-03-11 22:34:48,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 22:34:48,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:34:48,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 22:34:48,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 22:34:48,148 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 28 [2021-03-11 22:34:48,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 123 transitions, 1183 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:48,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:34:48,148 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 28 [2021-03-11 22:34:48,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:34:48,503 INFO L129 PetriNetUnfolder]: 145/549 cut-off events. [2021-03-11 22:34:48,504 INFO L130 PetriNetUnfolder]: For 2473/2473 co-relation queries the response was YES. [2021-03-11 22:34:48,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2595 conditions, 549 events. 145/549 cut-off events. For 2473/2473 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3978 event pairs, 13 based on Foata normal form. 2/551 useless extension candidates. Maximal degree in co-relation 2327. Up to 129 conditions per place. [2021-03-11 22:34:48,508 INFO L132 encePairwiseOnDemand]: 14/28 looper letters, 80 selfloop transitions, 67 changer transitions 18/169 dead transitions. [2021-03-11 22:34:48,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 169 transitions, 1975 flow [2021-03-11 22:34:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 22:34:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-03-11 22:34:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 233 transitions. [2021-03-11 22:34:48,510 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5200892857142857 [2021-03-11 22:34:48,510 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 233 transitions. [2021-03-11 22:34:48,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 233 transitions. [2021-03-11 22:34:48,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:34:48,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 233 transitions. [2021-03-11 22:34:48,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 14.5625) internal successors, (233), 16 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:48,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:48,513 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:48,513 INFO L185 Difference]: Start difference. First operand has 87 places, 123 transitions, 1183 flow. Second operand 16 states and 233 transitions. [2021-03-11 22:34:48,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 169 transitions, 1975 flow [2021-03-11 22:34:48,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 169 transitions, 1884 flow, removed 16 selfloop flow, removed 7 redundant places. [2021-03-11 22:34:48,533 INFO L241 Difference]: Finished difference. Result has 97 places, 121 transitions, 1241 flow [2021-03-11 22:34:48,533 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1241, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2021-03-11 22:34:48,533 INFO L335 CegarLoopForPetriNet]: 25 programPoint places, 72 predicate places. [2021-03-11 22:34:48,534 INFO L480 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1241 flow [2021-03-11 22:34:48,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:48,534 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:48,534 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:34:48,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 22:34:48,534 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:34:48,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:48,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1883448181, now seen corresponding path program 6 times [2021-03-11 22:34:48,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:48,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505985707] [2021-03-11 22:34:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:34:48,541 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:34:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 22:34:48,545 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 22:34:48,561 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 22:34:48,562 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 22:34:48,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 22:34:48,584 INFO L202 PluginConnector]: Adding new model NonAtomicIncrement_2Threads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 10:34:48 BasicIcfg [2021-03-11 22:34:48,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 22:34:48,589 INFO L168 Benchmark]: Toolchain (without parser) took 3005.72 ms. Allocated memory was 255.9 MB in the beginning and 453.0 MB in the end (delta: 197.1 MB). Free memory was 236.1 MB in the beginning and 437.5 MB in the end (delta: -201.4 MB). Peak memory consumption was 143.5 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:48,589 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:34:48,589 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.24 ms. Allocated memory is still 255.9 MB. Free memory was 235.5 MB in the beginning and 234.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:34:48,590 INFO L168 Benchmark]: Boogie Preprocessor took 13.55 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 233.2 MB in the end (delta: 918.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:48,590 INFO L168 Benchmark]: RCFGBuilder took 190.63 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 239.4 MB in the end (delta: -6.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:48,591 INFO L168 Benchmark]: TraceAbstraction took 2769.63 ms. Allocated memory was 255.9 MB in the beginning and 453.0 MB in the end (delta: 197.1 MB). Free memory was 238.8 MB in the beginning and 437.5 MB in the end (delta: -198.7 MB). Peak memory consumption was 143.8 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:48,597 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.24 ms. Allocated memory is still 255.9 MB. Free memory was 235.5 MB in the beginning and 234.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.55 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 233.2 MB in the end (delta: 918.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 190.63 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 239.4 MB in the end (delta: -6.2 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2769.63 ms. Allocated memory was 255.9 MB in the beginning and 453.0 MB in the end (delta: 197.1 MB). Free memory was 238.8 MB in the beginning and 437.5 MB in the end (delta: -198.7 MB). Peak memory consumption was 143.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 164.3ms, 27 PlacesBefore, 25 PlacesAfterwards, 22 TransitionsBefore, 20 TransitionsAfterwards, 140 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 430 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 124, positive: 78, positive conditional: 0, positive unconditional: 78, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 88, positive: 53, positive conditional: 0, positive unconditional: 53, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 88, positive: 53, positive conditional: 0, positive unconditional: 53, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 35, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 121, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 121, negative conditional: 0, negative unconditional: 121, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 124, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 88, unknown conditional: 0, unknown unconditional: 88] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27 - CounterExampleResult [Line: 28]: assertion can be violated assertion can be violated We found a FailurePath: [L22] 0 x := 0; VAL [x=0] [L24] FORK 0 fork 1 IncrementProcess1(); VAL [x=0] [L25] FORK 0 fork 2 IncrementProcess2(); VAL [x=0] [L54] 2 localx := x; VAL [localx=0, x=0] [L38] 1 localx := x; VAL [localx=0, localx=0, x=0] [L55] 2 x := localx + 1; VAL [localx=0, localx=0, x=1] [L57] 2 localx := x; VAL [localx=1, localx=0, x=1] [L58] 2 x := localx + 1; VAL [localx=1, localx=0, x=2] [L39] 1 x := localx + 1; VAL [localx=1, localx=0, x=1] [L41] 1 localx := x; VAL [localx=1, localx=1, x=1] [L60] 2 localx := x; VAL [localx=1, localx=1, x=1] [L42] 1 x := localx + 1; VAL [localx=1, localx=1, x=2] [L44] 1 localx := x; VAL [localx=1, localx=2, x=2] [L45] 1 x := localx + 1; [L61] 2 x := localx + 1; [L26] JOIN 1 join 1; VAL [localx=1, localx=2, x=2] [L27] JOIN 2 join 2; VAL [localx=1, localx=2, x=2] [L28] 0 assert x >= 3; VAL [localx=1, localx=2, x=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 2672.8ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1784.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 222.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 134 SDtfs, 167 SDslu, 153 SDs, 0 SdLazy, 1025 SolverSat, 246 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 528.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 684.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1241occurred in iteration=5, InterpolantAutomatonStates: 71, 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: 7.6ms SsaConstructionTime, 44.7ms SatisfiabilityAnalysisTime, 451.1ms InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 255 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...