/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 11:52:47,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 11:52:47,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 11:52:47,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 11:52:47,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 11:52:47,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 11:52:47,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 11:52:47,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 11:52:47,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 11:52:47,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 11:52:47,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 11:52:47,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 11:52:47,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 11:52:47,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 11:52:47,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 11:52:47,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 11:52:47,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 11:52:47,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 11:52:47,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 11:52:47,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 11:52:47,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 11:52:47,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 11:52:47,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 11:52:47,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 11:52:47,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 11:52:47,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 11:52:47,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 11:52:47,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 11:52:47,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 11:52:47,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 11:52:47,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 11:52:47,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 11:52:47,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 11:52:47,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 11:52:47,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 11:52:47,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 11:52:47,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-18 11:52:47,575 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 11:52:47,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 11:52:47,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 11:52:47,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 11:52:47,577 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 11:52:47,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 11:52:47,578 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 11:52:47,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 11:52:47,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 11:52:47,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 11:52:47,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 11:52:47,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 11:52:47,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 11:52:47,581 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 11:52:47,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 11:52:47,581 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 11:52:47,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 11:52:47,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 11:52:47,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 11:52:47,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 11:52:47,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 11:52:47,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 11:52:47,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 11:52:47,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 11:52:47,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 11:52:47,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 11:52:47,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 11:52:47,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 11:52:47,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-18 11:52:47,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 11:52:47,882 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 11:52:47,892 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 11:52:47,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 11:52:47,900 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 11:52:47,900 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 11:52:47,901 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/17_szymanski.i [2019-12-18 11:52:47,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f716d535e/84df82c826a04d34a8c6e263516c5f62/FLAGf4033e092 [2019-12-18 11:52:48,521 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 11:52:48,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/17_szymanski.i [2019-12-18 11:52:48,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f716d535e/84df82c826a04d34a8c6e263516c5f62/FLAGf4033e092 [2019-12-18 11:52:48,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f716d535e/84df82c826a04d34a8c6e263516c5f62 [2019-12-18 11:52:48,829 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 11:52:48,831 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 11:52:48,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 11:52:48,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 11:52:48,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 11:52:48,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:52:48" (1/1) ... [2019-12-18 11:52:48,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1ec31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:48, skipping insertion in model container [2019-12-18 11:52:48,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:52:48" (1/1) ... [2019-12-18 11:52:48,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 11:52:48,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 11:52:49,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:52:49,439 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 11:52:49,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 11:52:49,580 INFO L208 MainTranslator]: Completed translation [2019-12-18 11:52:49,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49 WrapperNode [2019-12-18 11:52:49,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 11:52:49,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 11:52:49,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 11:52:49,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 11:52:49,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (1/1) ... [2019-12-18 11:52:49,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (1/1) ... [2019-12-18 11:52:49,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 11:52:49,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 11:52:49,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 11:52:49,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 11:52:49,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (1/1) ... [2019-12-18 11:52:49,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (1/1) ... [2019-12-18 11:52:49,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (1/1) ... [2019-12-18 11:52:49,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (1/1) ... [2019-12-18 11:52:49,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (1/1) ... [2019-12-18 11:52:49,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (1/1) ... [2019-12-18 11:52:49,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (1/1) ... [2019-12-18 11:52:49,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 11:52:49,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 11:52:49,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 11:52:49,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 11:52:49,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (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 [2019-12-18 11:52:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2019-12-18 11:52:49,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2019-12-18 11:52:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 11:52:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 11:52:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 11:52:49,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 11:52:49,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 11:52:49,734 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 11:52:50,086 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 11:52:50,086 INFO L287 CfgBuilder]: Removed 16 assume(true) statements. [2019-12-18 11:52:50,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:52:50 BoogieIcfgContainer [2019-12-18 11:52:50,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 11:52:50,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 11:52:50,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 11:52:50,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 11:52:50,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:52:48" (1/3) ... [2019-12-18 11:52:50,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730d84aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:52:50, skipping insertion in model container [2019-12-18 11:52:50,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:52:49" (2/3) ... [2019-12-18 11:52:50,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730d84aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:52:50, skipping insertion in model container [2019-12-18 11:52:50,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:52:50" (3/3) ... [2019-12-18 11:52:50,096 INFO L109 eAbstractionObserver]: Analyzing ICFG 17_szymanski.i [2019-12-18 11:52:50,107 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 11:52:50,107 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 11:52:50,114 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-12-18 11:52:50,116 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 11:52:50,140 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:52:50,141 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:52:50,141 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:52:50,144 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:52:50,144 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:52:50,145 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:52:50,153 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:52:50,154 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:52:50,154 WARN L315 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:52:50,155 WARN L315 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 11:52:50,173 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-12-18 11:52:50,190 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 11:52:50,190 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 11:52:50,190 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 11:52:50,190 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 11:52:50,190 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 11:52:50,190 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 11:52:50,191 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 11:52:50,191 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 11:52:50,204 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 82 transitions [2019-12-18 11:52:50,206 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 62 places, 82 transitions [2019-12-18 11:52:50,254 INFO L126 PetriNetUnfolder]: 24/81 cut-off events. [2019-12-18 11:52:50,254 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:52:50,263 INFO L76 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 81 events. 24/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs. 3/58 useless extension candidates. Maximal degree in co-relation 70. Up to 3 conditions per place. [2019-12-18 11:52:50,270 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 62 places, 82 transitions [2019-12-18 11:52:50,292 INFO L126 PetriNetUnfolder]: 24/81 cut-off events. [2019-12-18 11:52:50,292 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 11:52:50,295 INFO L76 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 81 events. 24/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 134 event pairs. 3/58 useless extension candidates. Maximal degree in co-relation 70. Up to 3 conditions per place. [2019-12-18 11:52:50,301 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2400 [2019-12-18 11:52:50,302 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-18 11:52:51,240 INFO L206 etLargeBlockEncoding]: Checked pairs total: 4233 [2019-12-18 11:52:51,240 INFO L214 etLargeBlockEncoding]: Total number of compositions: 39 [2019-12-18 11:52:51,246 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 51 transitions [2019-12-18 11:52:51,264 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 227 states. [2019-12-18 11:52:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states. [2019-12-18 11:52:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 11:52:51,274 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:52:51,275 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:52:51,276 INFO L410 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:52:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:52:51,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1558311805, now seen corresponding path program 1 times [2019-12-18 11:52:51,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:52:51,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232338429] [2019-12-18 11:52:51,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:52:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:52:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:52:51,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232338429] [2019-12-18 11:52:51,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:52:51,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:52:51,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808280231] [2019-12-18 11:52:51,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-18 11:52:51,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:52:51,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-18 11:52:51,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-18 11:52:51,469 INFO L87 Difference]: Start difference. First operand 227 states. Second operand 2 states. [2019-12-18 11:52:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:52:51,495 INFO L93 Difference]: Finished difference Result 198 states and 534 transitions. [2019-12-18 11:52:51,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-18 11:52:51,497 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-12-18 11:52:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:52:51,512 INFO L225 Difference]: With dead ends: 198 [2019-12-18 11:52:51,512 INFO L226 Difference]: Without dead ends: 198 [2019-12-18 11:52:51,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-18 11:52:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-18 11:52:51,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2019-12-18 11:52:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-12-18 11:52:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 534 transitions. [2019-12-18 11:52:51,574 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 534 transitions. Word has length 9 [2019-12-18 11:52:51,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:52:51,575 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 534 transitions. [2019-12-18 11:52:51,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-18 11:52:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 534 transitions. [2019-12-18 11:52:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:52:51,576 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:52:51,576 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:52:51,577 INFO L410 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:52:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:52:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1031484476, now seen corresponding path program 1 times [2019-12-18 11:52:51,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:52:51,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456605943] [2019-12-18 11:52:51,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:52:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:52:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:52:51,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456605943] [2019-12-18 11:52:51,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:52:51,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:52:51,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507159416] [2019-12-18 11:52:51,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:52:51,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:52:51,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:52:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:51,656 INFO L87 Difference]: Start difference. First operand 198 states and 534 transitions. Second operand 3 states. [2019-12-18 11:52:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:52:51,726 INFO L93 Difference]: Finished difference Result 362 states and 979 transitions. [2019-12-18 11:52:51,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:52:51,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-12-18 11:52:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:52:51,735 INFO L225 Difference]: With dead ends: 362 [2019-12-18 11:52:51,736 INFO L226 Difference]: Without dead ends: 362 [2019-12-18 11:52:51,737 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2019-12-18 11:52:51,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 221. [2019-12-18 11:52:51,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-18 11:52:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 589 transitions. [2019-12-18 11:52:51,782 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 589 transitions. Word has length 11 [2019-12-18 11:52:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:52:51,783 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 589 transitions. [2019-12-18 11:52:51,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:52:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 589 transitions. [2019-12-18 11:52:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 11:52:51,784 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:52:51,784 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:52:51,785 INFO L410 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:52:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:52:51,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1746695160, now seen corresponding path program 1 times [2019-12-18 11:52:51,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:52:51,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413122050] [2019-12-18 11:52:51,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:52:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:52:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:52:51,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413122050] [2019-12-18 11:52:51,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:52:51,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 11:52:51,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247927904] [2019-12-18 11:52:51,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:52:51,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:52:51,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:52:51,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:51,837 INFO L87 Difference]: Start difference. First operand 221 states and 589 transitions. Second operand 3 states. [2019-12-18 11:52:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:52:51,855 INFO L93 Difference]: Finished difference Result 348 states and 934 transitions. [2019-12-18 11:52:51,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:52:51,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-12-18 11:52:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:52:51,860 INFO L225 Difference]: With dead ends: 348 [2019-12-18 11:52:51,860 INFO L226 Difference]: Without dead ends: 348 [2019-12-18 11:52:51,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:51,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-12-18 11:52:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 218. [2019-12-18 11:52:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-18 11:52:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 560 transitions. [2019-12-18 11:52:51,879 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 560 transitions. Word has length 11 [2019-12-18 11:52:51,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:52:51,880 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 560 transitions. [2019-12-18 11:52:51,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:52:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 560 transitions. [2019-12-18 11:52:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-18 11:52:51,882 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:52:51,882 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:52:51,883 INFO L410 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:52:51,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:52:51,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1652537164, now seen corresponding path program 1 times [2019-12-18 11:52:51,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:52:51,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172003307] [2019-12-18 11:52:51,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:52:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:52:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:52:51,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172003307] [2019-12-18 11:52:51,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:52:51,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:52:51,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806905013] [2019-12-18 11:52:51,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:52:51,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:52:51,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:52:51,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:51,943 INFO L87 Difference]: Start difference. First operand 218 states and 560 transitions. Second operand 3 states. [2019-12-18 11:52:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:52:52,002 INFO L93 Difference]: Finished difference Result 220 states and 542 transitions. [2019-12-18 11:52:52,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:52:52,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-12-18 11:52:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:52:52,004 INFO L225 Difference]: With dead ends: 220 [2019-12-18 11:52:52,005 INFO L226 Difference]: Without dead ends: 220 [2019-12-18 11:52:52,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-12-18 11:52:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2019-12-18 11:52:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-18 11:52:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 542 transitions. [2019-12-18 11:52:52,017 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 542 transitions. Word has length 19 [2019-12-18 11:52:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:52:52,017 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 542 transitions. [2019-12-18 11:52:52,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:52:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 542 transitions. [2019-12-18 11:52:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-18 11:52:52,020 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:52:52,020 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:52:52,020 INFO L410 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:52:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:52:52,021 INFO L82 PathProgramCache]: Analyzing trace with hash 952506058, now seen corresponding path program 1 times [2019-12-18 11:52:52,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:52:52,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30022847] [2019-12-18 11:52:52,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:52:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:52:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:52:52,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30022847] [2019-12-18 11:52:52,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:52:52,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:52:52,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316778474] [2019-12-18 11:52:52,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:52:52,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:52:52,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:52:52,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:52,064 INFO L87 Difference]: Start difference. First operand 220 states and 542 transitions. Second operand 3 states. [2019-12-18 11:52:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:52:52,118 INFO L93 Difference]: Finished difference Result 240 states and 579 transitions. [2019-12-18 11:52:52,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:52:52,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-12-18 11:52:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:52:52,120 INFO L225 Difference]: With dead ends: 240 [2019-12-18 11:52:52,121 INFO L226 Difference]: Without dead ends: 240 [2019-12-18 11:52:52,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-18 11:52:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 230. [2019-12-18 11:52:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2019-12-18 11:52:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 557 transitions. [2019-12-18 11:52:52,148 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 557 transitions. Word has length 19 [2019-12-18 11:52:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:52:52,149 INFO L462 AbstractCegarLoop]: Abstraction has 230 states and 557 transitions. [2019-12-18 11:52:52,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:52:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 557 transitions. [2019-12-18 11:52:52,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-18 11:52:52,150 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:52:52,151 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:52:52,151 INFO L410 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:52:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:52:52,151 INFO L82 PathProgramCache]: Analyzing trace with hash -687819132, now seen corresponding path program 2 times [2019-12-18 11:52:52,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:52:52,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399081614] [2019-12-18 11:52:52,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:52:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:52:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:52:52,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399081614] [2019-12-18 11:52:52,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:52:52,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:52:52,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958188700] [2019-12-18 11:52:52,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:52:52,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:52:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:52:52,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:52,195 INFO L87 Difference]: Start difference. First operand 230 states and 557 transitions. Second operand 3 states. [2019-12-18 11:52:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:52:52,243 INFO L93 Difference]: Finished difference Result 228 states and 541 transitions. [2019-12-18 11:52:52,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:52:52,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-12-18 11:52:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:52:52,245 INFO L225 Difference]: With dead ends: 228 [2019-12-18 11:52:52,245 INFO L226 Difference]: Without dead ends: 228 [2019-12-18 11:52:52,246 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:52,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-12-18 11:52:52,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2019-12-18 11:52:52,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-12-18 11:52:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 541 transitions. [2019-12-18 11:52:52,254 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 541 transitions. Word has length 19 [2019-12-18 11:52:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:52:52,255 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 541 transitions. [2019-12-18 11:52:52,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:52:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 541 transitions. [2019-12-18 11:52:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-18 11:52:52,256 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 11:52:52,256 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 11:52:52,257 INFO L410 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 11:52:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 11:52:52,257 INFO L82 PathProgramCache]: Analyzing trace with hash -36638496, now seen corresponding path program 3 times [2019-12-18 11:52:52,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 11:52:52,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999483528] [2019-12-18 11:52:52,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 11:52:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 11:52:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 11:52:52,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999483528] [2019-12-18 11:52:52,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 11:52:52,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 11:52:52,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071188247] [2019-12-18 11:52:52,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 11:52:52,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 11:52:52,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 11:52:52,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:52,326 INFO L87 Difference]: Start difference. First operand 228 states and 541 transitions. Second operand 3 states. [2019-12-18 11:52:52,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 11:52:52,369 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2019-12-18 11:52:52,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 11:52:52,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-12-18 11:52:52,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 11:52:52,370 INFO L225 Difference]: With dead ends: 194 [2019-12-18 11:52:52,370 INFO L226 Difference]: Without dead ends: 0 [2019-12-18 11:52:52,370 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 11:52:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-18 11:52:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-18 11:52:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-18 11:52:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-18 11:52:52,372 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-12-18 11:52:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 11:52:52,372 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-18 11:52:52,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 11:52:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-18 11:52:52,372 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-18 11:52:52,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:52:52 BasicIcfg [2019-12-18 11:52:52,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 11:52:52,380 INFO L168 Benchmark]: Toolchain (without parser) took 3548.52 ms. Allocated memory was 144.7 MB in the beginning and 249.0 MB in the end (delta: 104.3 MB). Free memory was 99.7 MB in the beginning and 189.7 MB in the end (delta: -90.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2019-12-18 11:52:52,386 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-12-18 11:52:52,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 749.33 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 99.3 MB in the beginning and 161.7 MB in the end (delta: -62.4 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-12-18 11:52:52,389 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.09 ms. Allocated memory is still 202.9 MB. Free memory was 161.7 MB in the beginning and 159.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-12-18 11:52:52,390 INFO L168 Benchmark]: Boogie Preprocessor took 29.20 ms. Allocated memory is still 202.9 MB. Free memory was 159.6 MB in the beginning and 158.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-18 11:52:52,391 INFO L168 Benchmark]: RCFGBuilder took 428.52 ms. Allocated memory is still 202.9 MB. Free memory was 157.6 MB in the beginning and 136.7 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. [2019-12-18 11:52:52,394 INFO L168 Benchmark]: TraceAbstraction took 2287.63 ms. Allocated memory was 202.9 MB in the beginning and 249.0 MB in the end (delta: 46.1 MB). Free memory was 136.0 MB in the beginning and 189.7 MB in the end (delta: -53.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 11:52:52,405 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 144.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 749.33 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 99.3 MB in the beginning and 161.7 MB in the end (delta: -62.4 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 48.09 ms. Allocated memory is still 202.9 MB. Free memory was 161.7 MB in the beginning and 159.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.20 ms. Allocated memory is still 202.9 MB. Free memory was 159.6 MB in the beginning and 158.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.52 ms. Allocated memory is still 202.9 MB. Free memory was 157.6 MB in the beginning and 136.7 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2287.63 ms. Allocated memory was 202.9 MB in the beginning and 249.0 MB in the end (delta: 46.1 MB). Free memory was 136.0 MB in the beginning and 189.7 MB in the end (delta: -53.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.0s, 62 ProgramPointsBefore, 33 ProgramPointsAfterwards, 82 TransitionsBefore, 51 TransitionsAfterwards, 2400 CoEnabledTransitionPairs, 5 FixpointIterations, 9 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 990 VarBasedMoverChecksPositive, 68 VarBasedMoverChecksNegative, 40 SemBasedMoverChecksPositive, 28 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 0 MoverChecksTotal, 4233 CheckedPairsTotal, 39 TotalNumberOfCompositions - PositiveResult [Line: 687]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 705]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 59 locations, 2 error locations. Result: SAFE, OverallTime: 2.1s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 373 SDtfs, 152 SDslu, 134 SDs, 0 SdLazy, 98 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=230occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 281 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 2248 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...