/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/s3_srvr_3a.BV.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:30:30,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:30:30,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:30:30,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:30:30,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:30:30,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:30:30,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:30:30,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:30:30,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:30:30,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:30:30,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:30:30,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:30:30,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:30:30,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:30:30,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:30:30,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:30:30,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:30:30,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:30:30,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:30:30,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:30:30,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:30:30,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:30:30,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:30:30,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:30:30,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:30:30,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:30:30,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:30:30,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:30:30,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:30:30,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:30:30,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:30:30,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:30:30,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:30:30,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:30:30,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:30:30,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:30:30,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:30:30,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:30:30,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:30:30,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:30:30,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:30:30,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:30:30,386 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:30:30,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:30:30,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:30:30,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:30:30,387 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:30:30,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:30:30,388 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:30:30,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:30:30,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:30:30,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:30:30,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:30:30,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:30:30,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:30:30,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:30:30,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:30:30,390 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:30:30,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:30:30,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:30:30,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:30:30,391 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:30:30,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:30:30,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:30:30,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:30:30,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:30:30,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:30:30,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:30:30,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:30:30,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:30:30,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:30:30,393 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:30:30,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:30:30,692 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:30:30,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:30:30,697 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:30:30,697 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:30:30,698 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/s3_srvr_3a.BV.c.cil.c [2020-10-13 05:30:30,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfa4a8144/6a340ac4714244108562d05daf65762f/FLAG0c18f5ab2 [2020-10-13 05:30:31,322 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:30:31,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/s3_srvr_3a.BV.c.cil.c [2020-10-13 05:30:31,341 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfa4a8144/6a340ac4714244108562d05daf65762f/FLAG0c18f5ab2 [2020-10-13 05:30:31,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfa4a8144/6a340ac4714244108562d05daf65762f [2020-10-13 05:30:31,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:30:31,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:30:31,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:30:31,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:30:31,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:30:31,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:30:31" (1/1) ... [2020-10-13 05:30:31,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19617743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:31, skipping insertion in model container [2020-10-13 05:30:31,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:30:31" (1/1) ... [2020-10-13 05:30:31,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:30:31,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:30:31,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:30:32,001 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:30:32,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:30:32,200 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:30:32,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:32 WrapperNode [2020-10-13 05:30:32,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:30:32,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:30:32,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:30:32,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:30:32,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:32" (1/1) ... [2020-10-13 05:30:32,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:32" (1/1) ... [2020-10-13 05:30:32,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:32" (1/1) ... [2020-10-13 05:30:32,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:32" (1/1) ... [2020-10-13 05:30:32,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:32" (1/1) ... [2020-10-13 05:30:32,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:32" (1/1) ... [2020-10-13 05:30:32,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:32" (1/1) ... [2020-10-13 05:30:32,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:30:32,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:30:32,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:30:32,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:30:32,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-13 05:30:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:30:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:30:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-10-13 05:30:32,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:30:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:30:32,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 05:30:32,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:30:32,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-13 05:30:32,346 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-10-13 05:30:32,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:30:32,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:30:32,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:30:32,584 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-10-13 05:30:33,029 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-10-13 05:30:33,029 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-10-13 05:30:33,040 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:30:33,041 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 05:30:33,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:30:33 BoogieIcfgContainer [2020-10-13 05:30:33,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:30:33,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:30:33,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:30:33,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:30:33,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:30:31" (1/3) ... [2020-10-13 05:30:33,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebe293d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:30:33, skipping insertion in model container [2020-10-13 05:30:33,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:30:32" (2/3) ... [2020-10-13 05:30:33,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebe293d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:30:33, skipping insertion in model container [2020-10-13 05:30:33,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:30:33" (3/3) ... [2020-10-13 05:30:33,056 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_3a.BV.c.cil.c [2020-10-13 05:30:33,067 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:30:33,076 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:30:33,091 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:30:33,118 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:30:33,118 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:30:33,119 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:30:33,119 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:30:33,119 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:30:33,119 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:30:33,119 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:30:33,120 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:30:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states. [2020-10-13 05:30:33,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:30:33,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:33,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:33,155 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash -459257302, now seen corresponding path program 1 times [2020-10-13 05:30:33,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:33,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191365249] [2020-10-13 05:30:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:33,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:33,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:33,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:33,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:33,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:30:33,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:30:33,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-13 05:30:33,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:30:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:30:33,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:30:33,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:30:33,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:33,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:33,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:33,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:30:33,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:33,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:33,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:33,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:33,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:33,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:33,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:30:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:30:33,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191365249] [2020-10-13 05:30:33,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:30:33,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:30:33,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585249574] [2020-10-13 05:30:33,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:30:33,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:33,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:30:33,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:30:33,992 INFO L87 Difference]: Start difference. First operand 146 states. Second operand 5 states. [2020-10-13 05:30:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:34,317 INFO L93 Difference]: Finished difference Result 306 states and 519 transitions. [2020-10-13 05:30:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:30:34,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-10-13 05:30:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:34,332 INFO L225 Difference]: With dead ends: 306 [2020-10-13 05:30:34,332 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 05:30:34,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:30:34,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 05:30:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-13 05:30:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 05:30:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 220 transitions. [2020-10-13 05:30:34,393 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 220 transitions. Word has length 49 [2020-10-13 05:30:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:34,393 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 220 transitions. [2020-10-13 05:30:34,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:30:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 220 transitions. [2020-10-13 05:30:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:30:34,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:34,397 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:34,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:30:34,397 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:34,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:34,398 INFO L82 PathProgramCache]: Analyzing trace with hash -155453879, now seen corresponding path program 1 times [2020-10-13 05:30:34,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:34,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075735100] [2020-10-13 05:30:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:34,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:34,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:34,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:34,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:34,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:30:34,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:30:34,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-13 05:30:34,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:34,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:34,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:30:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:30:34,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:30:34,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:34,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:34,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:34,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:30:34,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:34,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:30:34,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:34,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:34,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:34,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:30:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:30:34,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075735100] [2020-10-13 05:30:34,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:30:34,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:30:34,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700385838] [2020-10-13 05:30:34,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:30:34,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:34,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:30:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:30:34,690 INFO L87 Difference]: Start difference. First operand 147 states and 220 transitions. Second operand 3 states. [2020-10-13 05:30:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:34,947 INFO L93 Difference]: Finished difference Result 306 states and 467 transitions. [2020-10-13 05:30:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:30:34,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-10-13 05:30:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:34,950 INFO L225 Difference]: With dead ends: 306 [2020-10-13 05:30:34,950 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 05:30:34,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:30:34,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 05:30:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-10-13 05:30:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 05:30:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 246 transitions. [2020-10-13 05:30:34,968 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 246 transitions. Word has length 65 [2020-10-13 05:30:34,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:34,969 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 246 transitions. [2020-10-13 05:30:34,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:30:34,969 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 246 transitions. [2020-10-13 05:30:34,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:30:34,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:34,975 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:34,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:30:34,976 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:34,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1411293160, now seen corresponding path program 1 times [2020-10-13 05:30:34,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:34,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117559465] [2020-10-13 05:30:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:35,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:35,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:35,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:35,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:35,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 05:30:35,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:30:35,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-13 05:30:35,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 05:30:35,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:30:35,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:35,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:35,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:35,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:35,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:30:35,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:35,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:35,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:35,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:35,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 05:30:35,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117559465] [2020-10-13 05:30:35,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:30:35,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:30:35,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025263324] [2020-10-13 05:30:35,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:30:35,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:35,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:30:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:30:35,225 INFO L87 Difference]: Start difference. First operand 168 states and 246 transitions. Second operand 3 states. [2020-10-13 05:30:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:35,448 INFO L93 Difference]: Finished difference Result 369 states and 558 transitions. [2020-10-13 05:30:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:30:35,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-10-13 05:30:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:35,452 INFO L225 Difference]: With dead ends: 369 [2020-10-13 05:30:35,452 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 05:30:35,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:30:35,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 05:30:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-10-13 05:30:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-13 05:30:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 293 transitions. [2020-10-13 05:30:35,469 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 293 transitions. Word has length 86 [2020-10-13 05:30:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:35,470 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 293 transitions. [2020-10-13 05:30:35,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:30:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 293 transitions. [2020-10-13 05:30:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:30:35,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:35,475 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:35,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:30:35,475 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1163146666, now seen corresponding path program 1 times [2020-10-13 05:30:35,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:35,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504433924] [2020-10-13 05:30:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:35,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:35,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:35,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:35,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:35,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 05:30:35,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:30:35,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-13 05:30:35,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:35,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:35,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 05:30:35,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:30:35,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:35,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:35,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:35,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:35,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:30:35,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:35,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:35,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:35,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:35,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:35,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 05:30:35,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504433924] [2020-10-13 05:30:35,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:30:35,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:30:35,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74924228] [2020-10-13 05:30:35,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:30:35,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:35,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:30:35,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:30:35,703 INFO L87 Difference]: Start difference. First operand 210 states and 293 transitions. Second operand 3 states. [2020-10-13 05:30:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:35,862 INFO L93 Difference]: Finished difference Result 433 states and 615 transitions. [2020-10-13 05:30:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:30:35,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-10-13 05:30:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:35,864 INFO L225 Difference]: With dead ends: 433 [2020-10-13 05:30:35,865 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 05:30:35,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:30:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 05:30:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2020-10-13 05:30:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-13 05:30:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 321 transitions. [2020-10-13 05:30:35,879 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 321 transitions. Word has length 86 [2020-10-13 05:30:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:35,879 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 321 transitions. [2020-10-13 05:30:35,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:30:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 321 transitions. [2020-10-13 05:30:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 05:30:35,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:35,881 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:35,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:30:35,882 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:35,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1300843708, now seen corresponding path program 1 times [2020-10-13 05:30:35,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:35,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251267717] [2020-10-13 05:30:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:35,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:36,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:36,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:36,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:36,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 05:30:36,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:30:36,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-13 05:30:36,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 05:30:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:30:36,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:36,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:36,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:36,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:36,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:30:36,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:36,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:36,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:36,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:36,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:36,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:36,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-13 05:30:36,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251267717] [2020-10-13 05:30:36,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:30:36,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:30:36,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748775936] [2020-10-13 05:30:36,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:30:36,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:36,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:30:36,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:30:36,182 INFO L87 Difference]: Start difference. First operand 233 states and 321 transitions. Second operand 3 states. [2020-10-13 05:30:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:36,344 INFO L93 Difference]: Finished difference Result 490 states and 691 transitions. [2020-10-13 05:30:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:30:36,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-10-13 05:30:36,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:36,348 INFO L225 Difference]: With dead ends: 490 [2020-10-13 05:30:36,348 INFO L226 Difference]: Without dead ends: 270 [2020-10-13 05:30:36,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:30:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-13 05:30:36,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 258. [2020-10-13 05:30:36,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 05:30:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2020-10-13 05:30:36,361 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 106 [2020-10-13 05:30:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:36,361 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2020-10-13 05:30:36,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:30:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2020-10-13 05:30:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 05:30:36,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:36,363 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:36,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:30:36,364 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1449286990, now seen corresponding path program 1 times [2020-10-13 05:30:36,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:36,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418488057] [2020-10-13 05:30:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:36,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:36,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:36,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 05:30:36,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:36,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-13 05:30:36,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:36,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 05:30:36,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 05:30:36,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:30:36,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:36,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:36,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:36,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:30:36,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:36,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:36,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:36,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:30:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-13 05:30:36,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418488057] [2020-10-13 05:30:36,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:30:36,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:30:36,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338329064] [2020-10-13 05:30:36,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:30:36,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:36,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:30:36,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:30:36,546 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand 3 states. [2020-10-13 05:30:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:36,597 INFO L93 Difference]: Finished difference Result 503 states and 685 transitions. [2020-10-13 05:30:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:30:36,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 126 [2020-10-13 05:30:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:36,601 INFO L225 Difference]: With dead ends: 503 [2020-10-13 05:30:36,602 INFO L226 Difference]: Without dead ends: 501 [2020-10-13 05:30:36,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:30:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-13 05:30:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2020-10-13 05:30:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-10-13 05:30:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 683 transitions. [2020-10-13 05:30:36,621 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 683 transitions. Word has length 126 [2020-10-13 05:30:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:36,622 INFO L479 AbstractCegarLoop]: Abstraction has 501 states and 683 transitions. [2020-10-13 05:30:36,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:30:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 683 transitions. [2020-10-13 05:30:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 05:30:36,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:36,624 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:36,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:30:36,625 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1933623263, now seen corresponding path program 1 times [2020-10-13 05:30:36,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:36,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676201576] [2020-10-13 05:30:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:36,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:36,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676201576] [2020-10-13 05:30:36,683 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-10-13 05:30:36,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:30:36,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-13 05:30:36,684 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-10-13 05:30:36,684 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 05:30:36,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:30:36,722 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-13 05:30:36,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 05:30:36 BoogieIcfgContainer [2020-10-13 05:30:36,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 05:30:36,725 INFO L168 Benchmark]: Toolchain (without parser) took 5032.19 ms. Allocated memory was 147.3 MB in the beginning and 285.7 MB in the end (delta: 138.4 MB). Free memory was 103.0 MB in the beginning and 198.8 MB in the end (delta: -95.8 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. [2020-10-13 05:30:36,726 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 05:30:36,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 507.80 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 102.8 MB in the beginning and 178.5 MB in the end (delta: -75.7 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-10-13 05:30:36,728 INFO L168 Benchmark]: Boogie Preprocessor took 73.35 ms. Allocated memory is still 203.4 MB. Free memory was 178.5 MB in the beginning and 175.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-10-13 05:30:36,729 INFO L168 Benchmark]: RCFGBuilder took 771.02 ms. Allocated memory is still 203.4 MB. Free memory was 175.5 MB in the beginning and 126.1 MB in the end (delta: 49.4 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. [2020-10-13 05:30:36,729 INFO L168 Benchmark]: TraceAbstraction took 3674.64 ms. Allocated memory was 203.4 MB in the beginning and 285.7 MB in the end (delta: 82.3 MB). Free memory was 126.1 MB in the beginning and 198.8 MB in the end (delta: -72.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-13 05:30:36,733 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 507.80 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 102.8 MB in the beginning and 178.5 MB in the end (delta: -75.7 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.35 ms. Allocated memory is still 203.4 MB. Free memory was 178.5 MB in the beginning and 175.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 771.02 ms. Allocated memory is still 203.4 MB. Free memory was 175.5 MB in the beginning and 126.1 MB in the end (delta: 49.4 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3674.64 ms. Allocated memory was 203.4 MB in the beginning and 285.7 MB in the end (delta: 82.3 MB). Free memory was 126.1 MB in the beginning and 198.8 MB in the end (delta: -72.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 667]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint, overapproximation of bitwiseAnd at line 83. Possible FailurePath: [L676] int s ; [L677] int tmp ; [L681] s = 8464 [L682] CALL ssl3_accept(s) [L10] int s__info_callback = __VERIFIER_nondet_int(); [L11] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L12] int s__state ; [L13] int s__new_session ; [L14] int s__server ; [L15] int s__version = __VERIFIER_nondet_int(); [L16] int s__type ; [L17] int s__init_num ; [L18] int s__hit = __VERIFIER_nondet_int(); [L19] int s__rwstate ; [L20] int s__init_buf___0 ; [L21] int s__debug = __VERIFIER_nondet_int(); [L22] int s__shutdown ; [L23] int s__cert = __VERIFIER_nondet_int(); [L24] int s__options = __VERIFIER_nondet_int(); [L25] int s__verify_mode = __VERIFIER_nondet_int(); [L26] int s__session__peer = __VERIFIER_nondet_int(); [L27] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int(); [L28] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L29] int s__ctx__stats__sess_accept_renegotiate ; [L30] int s__ctx__stats__sess_accept ; [L31] unsigned int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_uint(); [L32] int s__s3__tmp__cert_request ; [L33] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L34] int s__s3__tmp__use_rsa_tmp ; [L35] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__next_state___0 ; [L38] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int(); [L39] int s__session__cipher ; [L40] int buf ; [L41] unsigned long l ; [L42] unsigned long Time ; [L43] unsigned long tmp ; [L44] int cb ; [L45] long num1 ; [L46] int ret ; [L47] int new_state ; [L48] int state ; [L49] int skip ; [L50] int got_new_session ; [L51] int tmp___1 = __VERIFIER_nondet_int(); [L52] int tmp___2 = __VERIFIER_nondet_int(); [L53] int tmp___3 = __VERIFIER_nondet_int(); [L54] int tmp___4 = __VERIFIER_nondet_int(); [L55] int tmp___5 = __VERIFIER_nondet_int(); [L56] int tmp___6 = __VERIFIER_nondet_int(); [L57] int tmp___7 ; [L58] long tmp___8 = __VERIFIER_nondet_long(); [L59] int tmp___9 = __VERIFIER_nondet_int(); [L60] int tmp___10 = __VERIFIER_nondet_int(); [L61] int blastFlag ; [L62] int __retres67 ; [L65] s__state = initial_state [L66] blastFlag = 0 [L67] tmp = __VERIFIER_nondet_int() [L68] Time = tmp [L69] cb = 0 [L70] ret = -1 [L71] skip = 0 [L72] got_new_session = 0 [L73] COND TRUE s__info_callback != 0 [L74] cb = s__info_callback [L82] s__in_handshake = s__in_handshake + 1 [L83] COND FALSE !(tmp___1 & 12288) [L92] COND FALSE !(s__cert == 0) [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND TRUE s__state == 8464 [L287] s__shutdown = 0 [L288] ret = __VERIFIER_nondet_int() [L289] COND TRUE blastFlag == 0 [L290] blastFlag = 1 [L294] COND FALSE !(ret <= 0) [L299] got_new_session = 1 [L300] s__state = 8496 [L301] s__init_num = 0 [L625] COND FALSE !(! s__s3__tmp__reuse_message) [L654] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND TRUE s__state == 8496 [L305] ret = __VERIFIER_nondet_int() [L306] COND TRUE blastFlag == 1 [L307] blastFlag = 2 [L311] COND FALSE !(ret <= 0) [L316] COND TRUE \read(s__hit) [L317] s__state = 8656 [L321] s__init_num = 0 [L625] COND FALSE !(! s__s3__tmp__reuse_message) [L654] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND FALSE !(s__state == 8544) [L156] COND FALSE !(s__state == 8545) [L159] COND FALSE !(s__state == 8560) [L162] COND FALSE !(s__state == 8561) [L165] COND FALSE !(s__state == 8448) [L168] COND FALSE !(s__state == 8576) [L171] COND FALSE !(s__state == 8577) [L174] COND FALSE !(s__state == 8592) [L177] COND FALSE !(s__state == 8593) [L180] COND FALSE !(s__state == 8608) [L183] COND FALSE !(s__state == 8609) [L186] COND FALSE !(s__state == 8640) [L189] COND FALSE !(s__state == 8641) [L192] COND TRUE s__state == 8656 [L519] s__session__cipher = s__s3__tmp__new_cipher [L520] COND FALSE !(! tmp___9) [L526] ret = __VERIFIER_nondet_int() [L527] COND TRUE blastFlag == 2 [L528] blastFlag = 3 [L532] COND FALSE !(ret <= 0) [L537] s__state = 8672 [L538] s__init_num = 0 [L539] COND FALSE !(! tmp___10) [L625] COND FALSE !(! s__s3__tmp__reuse_message) [L654] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND FALSE !(s__state == 8544) [L156] COND FALSE !(s__state == 8545) [L159] COND FALSE !(s__state == 8560) [L162] COND FALSE !(s__state == 8561) [L165] COND FALSE !(s__state == 8448) [L168] COND FALSE !(s__state == 8576) [L171] COND FALSE !(s__state == 8577) [L174] COND FALSE !(s__state == 8592) [L177] COND FALSE !(s__state == 8593) [L180] COND FALSE !(s__state == 8608) [L183] COND FALSE !(s__state == 8609) [L186] COND TRUE s__state == 8640 [L499] ret = __VERIFIER_nondet_int() [L500] COND TRUE blastFlag == 3 [L501] blastFlag = blastFlag + s__state / s__s3__tmp__next_state___0 [L505] COND FALSE !(ret <= 0) [L510] COND TRUE \read(s__hit) [L511] s__state = 3 [L515] s__init_num = 0 [L625] COND FALSE !(! s__s3__tmp__reuse_message) [L654] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND FALSE !(s__state == 8544) [L156] COND FALSE !(s__state == 8545) [L159] COND FALSE !(s__state == 8560) [L162] COND FALSE !(s__state == 8561) [L165] COND FALSE !(s__state == 8448) [L168] COND FALSE !(s__state == 8576) [L171] COND FALSE !(s__state == 8577) [L174] COND FALSE !(s__state == 8592) [L177] COND FALSE !(s__state == 8593) [L180] COND FALSE !(s__state == 8608) [L183] COND FALSE !(s__state == 8609) [L186] COND FALSE !(s__state == 8640) [L189] COND FALSE !(s__state == 8641) [L192] COND FALSE !(s__state == 8656) [L195] COND FALSE !(s__state == 8657) [L198] COND TRUE s__state == 8672 [L548] ret = __VERIFIER_nondet_int() [L549] COND TRUE blastFlag == 4 [L667] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 146 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 3.5s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1229 SDtfs, 500 SDslu, 958 SDs, 0 SdLazy, 601 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=501occurred in iteration=6, 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, 6 MinimizatonAttempts, 26 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 682 NumberOfCodeBlocks, 682 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 512 ConstructedInterpolants, 0 QuantifiedInterpolants, 78244 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 270/270 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...