/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:25:32,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:25:32,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:25:32,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:25:32,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:25:32,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:25:32,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:25:32,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:25:32,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:25:32,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:25:32,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:25:32,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:25:32,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:25:32,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:25:32,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:25:32,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:25:32,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:25:32,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:25:32,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:25:32,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:25:32,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:25:32,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:25:32,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:25:32,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:25:32,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:25:32,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:25:32,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:25:32,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:25:32,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:25:32,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:25:32,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:25:32,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:25:32,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:25:32,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:25:32,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:25:32,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:25:32,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:25:32,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:25:32,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:25:32,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:25:32,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:25:32,221 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 [2020-09-21 12:25:32,269 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:25:32,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:25:32,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:25:32,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:25:32,272 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:25:32,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:25:32,273 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:25:32,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:25:32,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:25:32,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:25:32,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:25:32,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:25:32,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:25:32,276 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:25:32,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:25:32,276 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:25:32,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:25:32,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:25:32,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:25:32,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:25:32,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:25:32,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:25:32,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:25:32,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:25:32,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:25:32,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:25:32,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:25:32,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:25:32,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:25:32,279 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.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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:25:32,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:25:32,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:25:32,787 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:25:32,790 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:25:32,793 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:25:32,795 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-09-21 12:25:32,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0bb32ced/fb866874f58747909c40b23b875798fa/FLAGc2af6c2d4 [2020-09-21 12:25:33,434 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:25:33,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-09-21 12:25:33,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0bb32ced/fb866874f58747909c40b23b875798fa/FLAGc2af6c2d4 [2020-09-21 12:25:33,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0bb32ced/fb866874f58747909c40b23b875798fa [2020-09-21 12:25:33,740 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:25:33,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:25:33,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:33,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:25:33,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:25:33,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:33" (1/1) ... [2020-09-21 12:25:33,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f6647d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:33, skipping insertion in model container [2020-09-21 12:25:33,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:33" (1/1) ... [2020-09-21 12:25:33,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:25:33,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:25:34,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:34,154 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:25:34,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:34,325 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:25:34,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:34 WrapperNode [2020-09-21 12:25:34,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:34,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:25:34,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:25:34,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:25:34,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:34" (1/1) ... [2020-09-21 12:25:34,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:34" (1/1) ... [2020-09-21 12:25:34,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:34" (1/1) ... [2020-09-21 12:25:34,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:34" (1/1) ... [2020-09-21 12:25:34,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:34" (1/1) ... [2020-09-21 12:25:34,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:34" (1/1) ... [2020-09-21 12:25:34,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:34" (1/1) ... [2020-09-21 12:25:34,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:25:34,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:25:34,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:25:34,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:25:34,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:34" (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 [2020-09-21 12:25:34,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:25:34,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:25:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-09-21 12:25:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:25:34,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:25:34,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:25:34,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:25:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-21 12:25:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-09-21 12:25:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:25:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:25:34,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:25:34,754 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-21 12:25:35,271 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-09-21 12:25:35,272 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-09-21 12:25:35,285 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:25:35,286 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:25:35,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:35 BoogieIcfgContainer [2020-09-21 12:25:35,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:25:35,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:25:35,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:25:35,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:25:35,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:25:33" (1/3) ... [2020-09-21 12:25:35,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f781a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:35, skipping insertion in model container [2020-09-21 12:25:35,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:34" (2/3) ... [2020-09-21 12:25:35,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f781a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:35, skipping insertion in model container [2020-09-21 12:25:35,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:35" (3/3) ... [2020-09-21 12:25:35,304 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-09-21 12:25:35,318 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:25:35,330 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:25:35,355 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:25:35,391 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:25:35,391 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:25:35,391 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:25:35,391 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:25:35,392 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:25:35,392 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:25:35,392 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:25:35,392 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:25:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-09-21 12:25:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:25:35,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:35,432 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] [2020-09-21 12:25:35,432 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:35,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-09-21 12:25:35,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:35,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222716878] [2020-09-21 12:25:35,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:35,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:35,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:36,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:36,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:36,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:36,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:25:36,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:25:36,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-09-21 12:25:36,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:25:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:25:36,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:25:36,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:36,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:36,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:36,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:36,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:36,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:36,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:36,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:36,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:36,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:36,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:36,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222716878] [2020-09-21 12:25:36,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:36,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:36,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185878928] [2020-09-21 12:25:36,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:36,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:36,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:36,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:36,768 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 3 states. [2020-09-21 12:25:36,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:36,872 INFO L93 Difference]: Finished difference Result 444 states and 760 transitions. [2020-09-21 12:25:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:36,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-09-21 12:25:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:36,895 INFO L225 Difference]: With dead ends: 444 [2020-09-21 12:25:36,895 INFO L226 Difference]: Without dead ends: 271 [2020-09-21 12:25:36,901 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 [2020-09-21 12:25:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-09-21 12:25:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2020-09-21 12:25:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-09-21 12:25:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 418 transitions. [2020-09-21 12:25:36,978 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 418 transitions. Word has length 28 [2020-09-21 12:25:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:36,979 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 418 transitions. [2020-09-21 12:25:36,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 418 transitions. [2020-09-21 12:25:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:25:36,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:36,981 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] [2020-09-21 12:25:36,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:25:36,982 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:36,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:36,983 INFO L82 PathProgramCache]: Analyzing trace with hash -402909183, now seen corresponding path program 1 times [2020-09-21 12:25:36,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:36,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66550288] [2020-09-21 12:25:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:37,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:37,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:37,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:37,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:37,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 12:25:37,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:37,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-09-21 12:25:37,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:25:37,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:25:37,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:25:37,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:37,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:37,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:37,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:37,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:37,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:37,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:37,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:37,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:37,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:37,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:37,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:37,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66550288] [2020-09-21 12:25:37,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:37,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:25:37,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437819224] [2020-09-21 12:25:37,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:25:37,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:37,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:25:37,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:25:37,356 INFO L87 Difference]: Start difference. First operand 269 states and 418 transitions. Second operand 4 states. [2020-09-21 12:25:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:37,646 INFO L93 Difference]: Finished difference Result 577 states and 896 transitions. [2020-09-21 12:25:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:25:37,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-21 12:25:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:37,650 INFO L225 Difference]: With dead ends: 577 [2020-09-21 12:25:37,650 INFO L226 Difference]: Without dead ends: 322 [2020-09-21 12:25:37,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:25:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-21 12:25:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 308. [2020-09-21 12:25:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-09-21 12:25:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 470 transitions. [2020-09-21 12:25:37,686 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 470 transitions. Word has length 29 [2020-09-21 12:25:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:37,688 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 470 transitions. [2020-09-21 12:25:37,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:25:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 470 transitions. [2020-09-21 12:25:37,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:25:37,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:37,691 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] [2020-09-21 12:25:37,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:25:37,692 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash -973968886, now seen corresponding path program 1 times [2020-09-21 12:25:37,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:37,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344052591] [2020-09-21 12:25:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:37,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:37,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:37,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:38,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:38,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:38,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:38,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:38,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:25:38,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-21 12:25:38,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-09-21 12:25:38,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:38,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:38,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-21 12:25:38,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:25:38,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:38,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:38,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:38,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:38,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:38,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:38,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:38,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:38,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:38,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:38,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344052591] [2020-09-21 12:25:38,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:38,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:38,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553770758] [2020-09-21 12:25:38,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:38,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:38,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:38,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:38,487 INFO L87 Difference]: Start difference. First operand 308 states and 470 transitions. Second operand 3 states. [2020-09-21 12:25:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:38,504 INFO L93 Difference]: Finished difference Result 590 states and 906 transitions. [2020-09-21 12:25:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:38,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-21 12:25:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:38,507 INFO L225 Difference]: With dead ends: 590 [2020-09-21 12:25:38,507 INFO L226 Difference]: Without dead ends: 286 [2020-09-21 12:25:38,508 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 [2020-09-21 12:25:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-21 12:25:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2020-09-21 12:25:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-09-21 12:25:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 432 transitions. [2020-09-21 12:25:38,525 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 432 transitions. Word has length 30 [2020-09-21 12:25:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:38,525 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 432 transitions. [2020-09-21 12:25:38,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 432 transitions. [2020-09-21 12:25:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:25:38,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:38,527 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] [2020-09-21 12:25:38,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:25:38,528 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:38,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1314576917, now seen corresponding path program 1 times [2020-09-21 12:25:38,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:38,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483147051] [2020-09-21 12:25:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:38,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:38,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:38,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:38,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:38,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:25:38,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:38,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-09-21 12:25:38,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:38,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:25:38,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:25:38,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:25:38,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:38,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:38,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:38,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:38,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:38,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:38,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:38,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:38,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:38,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:38,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:38,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:38,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483147051] [2020-09-21 12:25:38,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:38,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:25:38,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371136569] [2020-09-21 12:25:38,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:25:38,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:38,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:25:38,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:25:38,811 INFO L87 Difference]: Start difference. First operand 286 states and 432 transitions. Second operand 4 states. [2020-09-21 12:25:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:39,019 INFO L93 Difference]: Finished difference Result 346 states and 521 transitions. [2020-09-21 12:25:39,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:25:39,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-09-21 12:25:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:39,022 INFO L225 Difference]: With dead ends: 346 [2020-09-21 12:25:39,023 INFO L226 Difference]: Without dead ends: 344 [2020-09-21 12:25:39,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:25:39,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-09-21 12:25:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 292. [2020-09-21 12:25:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-09-21 12:25:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 443 transitions. [2020-09-21 12:25:39,037 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 443 transitions. Word has length 30 [2020-09-21 12:25:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:39,037 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 443 transitions. [2020-09-21 12:25:39,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:25:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 443 transitions. [2020-09-21 12:25:39,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:25:39,039 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:39,039 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] [2020-09-21 12:25:39,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:25:39,040 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:39,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1196228522, now seen corresponding path program 1 times [2020-09-21 12:25:39,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:39,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035000445] [2020-09-21 12:25:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:39,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:39,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:39,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:39,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:39,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:25:39,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:39,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-09-21 12:25:39,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:39,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:25:39,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:25:39,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:25:39,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:25:39,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:39,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:39,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:39,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:39,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:39,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:39,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:39,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:39,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:39,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:39,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:39,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035000445] [2020-09-21 12:25:39,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:39,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:25:39,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808464704] [2020-09-21 12:25:39,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:25:39,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:39,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:25:39,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:25:39,395 INFO L87 Difference]: Start difference. First operand 292 states and 443 transitions. Second operand 4 states. [2020-09-21 12:25:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:39,626 INFO L93 Difference]: Finished difference Result 352 states and 531 transitions. [2020-09-21 12:25:39,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:25:39,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-09-21 12:25:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:39,629 INFO L225 Difference]: With dead ends: 352 [2020-09-21 12:25:39,630 INFO L226 Difference]: Without dead ends: 350 [2020-09-21 12:25:39,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:25:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-09-21 12:25:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 292. [2020-09-21 12:25:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-09-21 12:25:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 443 transitions. [2020-09-21 12:25:39,644 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 443 transitions. Word has length 30 [2020-09-21 12:25:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:39,644 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 443 transitions. [2020-09-21 12:25:39,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:25:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 443 transitions. [2020-09-21 12:25:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 12:25:39,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:39,647 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] [2020-09-21 12:25:39,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:25:39,647 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:39,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1933074875, now seen corresponding path program 1 times [2020-09-21 12:25:39,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:39,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367231900] [2020-09-21 12:25:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:39,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:39,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:39,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:39,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:40,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:40,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 12:25:40,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:25:40,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-09-21 12:25:40,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:40,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:40,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:40,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 12:25:40,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:40,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:40,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:40,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:40,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:40,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:40,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:40,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:40,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:40,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:40,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367231900] [2020-09-21 12:25:40,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:40,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:40,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035257317] [2020-09-21 12:25:40,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:40,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:40,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:40,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:40,052 INFO L87 Difference]: Start difference. First operand 292 states and 443 transitions. Second operand 3 states. [2020-09-21 12:25:40,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:40,134 INFO L93 Difference]: Finished difference Result 848 states and 1293 transitions. [2020-09-21 12:25:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:40,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-09-21 12:25:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:40,139 INFO L225 Difference]: With dead ends: 848 [2020-09-21 12:25:40,139 INFO L226 Difference]: Without dead ends: 570 [2020-09-21 12:25:40,141 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 [2020-09-21 12:25:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-09-21 12:25:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 568. [2020-09-21 12:25:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-09-21 12:25:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 847 transitions. [2020-09-21 12:25:40,180 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 847 transitions. Word has length 38 [2020-09-21 12:25:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:40,181 INFO L479 AbstractCegarLoop]: Abstraction has 568 states and 847 transitions. [2020-09-21 12:25:40,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:40,181 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 847 transitions. [2020-09-21 12:25:40,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 12:25:40,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:40,184 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] [2020-09-21 12:25:40,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:25:40,185 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:40,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:40,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1232010297, now seen corresponding path program 1 times [2020-09-21 12:25:40,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:40,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649325830] [2020-09-21 12:25:40,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:40,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:40,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:40,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:40,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:40,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:40,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 12:25:40,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:25:40,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-09-21 12:25:40,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-21 12:25:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:25:40,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:40,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:40,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:40,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:40,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:40,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:40,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:40,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:40,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:40,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:40,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:40,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:40,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649325830] [2020-09-21 12:25:40,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:40,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:40,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999965237] [2020-09-21 12:25:40,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:40,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:40,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:40,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:40,922 INFO L87 Difference]: Start difference. First operand 568 states and 847 transitions. Second operand 3 states. [2020-09-21 12:25:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:41,164 INFO L93 Difference]: Finished difference Result 1346 states and 2040 transitions. [2020-09-21 12:25:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:41,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-09-21 12:25:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:41,170 INFO L225 Difference]: With dead ends: 1346 [2020-09-21 12:25:41,170 INFO L226 Difference]: Without dead ends: 774 [2020-09-21 12:25:41,172 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 [2020-09-21 12:25:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-09-21 12:25:41,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 750. [2020-09-21 12:25:41,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2020-09-21 12:25:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1055 transitions. [2020-09-21 12:25:41,215 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1055 transitions. Word has length 38 [2020-09-21 12:25:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:41,215 INFO L479 AbstractCegarLoop]: Abstraction has 750 states and 1055 transitions. [2020-09-21 12:25:41,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1055 transitions. [2020-09-21 12:25:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 12:25:41,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:41,217 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] [2020-09-21 12:25:41,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:25:41,218 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:41,218 INFO L82 PathProgramCache]: Analyzing trace with hash -551951927, now seen corresponding path program 1 times [2020-09-21 12:25:41,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:41,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399763366] [2020-09-21 12:25:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:41,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:41,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:41,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:41,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:41,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 12:25:41,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:41,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-09-21 12:25:41,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:41,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:25:41,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:25:41,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 12:25:41,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:41,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:41,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:41,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:41,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:41,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:41,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:41,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:41,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:41,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:41,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399763366] [2020-09-21 12:25:41,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:41,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:25:41,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832761015] [2020-09-21 12:25:41,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:25:41,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:41,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:25:41,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:25:41,701 INFO L87 Difference]: Start difference. First operand 750 states and 1055 transitions. Second operand 5 states. [2020-09-21 12:25:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:41,952 INFO L93 Difference]: Finished difference Result 1520 states and 2138 transitions. [2020-09-21 12:25:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:25:41,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-09-21 12:25:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:41,957 INFO L225 Difference]: With dead ends: 1520 [2020-09-21 12:25:41,958 INFO L226 Difference]: Without dead ends: 784 [2020-09-21 12:25:41,960 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 [2020-09-21 12:25:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-09-21 12:25:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 772. [2020-09-21 12:25:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2020-09-21 12:25:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1077 transitions. [2020-09-21 12:25:41,988 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1077 transitions. Word has length 38 [2020-09-21 12:25:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:41,988 INFO L479 AbstractCegarLoop]: Abstraction has 772 states and 1077 transitions. [2020-09-21 12:25:41,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:25:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1077 transitions. [2020-09-21 12:25:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 12:25:41,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:41,991 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] [2020-09-21 12:25:41,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:25:41,991 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:41,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1216281850, now seen corresponding path program 1 times [2020-09-21 12:25:41,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:41,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009505516] [2020-09-21 12:25:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:42,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:42,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:42,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:42,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-21 12:25:42,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:42,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-21 12:25:42,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:42,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:42,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 12:25:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:42,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:42,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:42,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:42,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:42,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:42,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:42,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:42,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:42,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:42,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:42,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:42,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009505516] [2020-09-21 12:25:42,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:42,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:42,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203912918] [2020-09-21 12:25:42,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:42,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:42,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:42,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:42,173 INFO L87 Difference]: Start difference. First operand 772 states and 1077 transitions. Second operand 3 states. [2020-09-21 12:25:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:42,199 INFO L93 Difference]: Finished difference Result 1508 states and 2114 transitions. [2020-09-21 12:25:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:42,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-09-21 12:25:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:42,205 INFO L225 Difference]: With dead ends: 1508 [2020-09-21 12:25:42,205 INFO L226 Difference]: Without dead ends: 772 [2020-09-21 12:25:42,215 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 [2020-09-21 12:25:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2020-09-21 12:25:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2020-09-21 12:25:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2020-09-21 12:25:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1063 transitions. [2020-09-21 12:25:42,247 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1063 transitions. Word has length 54 [2020-09-21 12:25:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:42,248 INFO L479 AbstractCegarLoop]: Abstraction has 772 states and 1063 transitions. [2020-09-21 12:25:42,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1063 transitions. [2020-09-21 12:25:42,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 12:25:42,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:42,250 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:25:42,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:25:42,251 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:42,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:42,251 INFO L82 PathProgramCache]: Analyzing trace with hash -368212937, now seen corresponding path program 1 times [2020-09-21 12:25:42,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:42,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104165869] [2020-09-21 12:25:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:42,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:42,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:42,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 12:25:42,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:42,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-21 12:25:42,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:42,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:42,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:42,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 12:25:42,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:42,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:42,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:42,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:42,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:42,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:42,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:42,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:42,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:42,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:42,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:42,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:42,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104165869] [2020-09-21 12:25:42,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:42,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:42,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096169786] [2020-09-21 12:25:42,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:42,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:42,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:42,417 INFO L87 Difference]: Start difference. First operand 772 states and 1063 transitions. Second operand 3 states. [2020-09-21 12:25:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:42,461 INFO L93 Difference]: Finished difference Result 1528 states and 2110 transitions. [2020-09-21 12:25:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:42,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-09-21 12:25:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:42,466 INFO L225 Difference]: With dead ends: 1528 [2020-09-21 12:25:42,467 INFO L226 Difference]: Without dead ends: 792 [2020-09-21 12:25:42,468 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 [2020-09-21 12:25:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-09-21 12:25:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 788. [2020-09-21 12:25:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2020-09-21 12:25:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1069 transitions. [2020-09-21 12:25:42,497 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1069 transitions. Word has length 55 [2020-09-21 12:25:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:42,497 INFO L479 AbstractCegarLoop]: Abstraction has 788 states and 1069 transitions. [2020-09-21 12:25:42,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1069 transitions. [2020-09-21 12:25:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 12:25:42,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:42,499 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:25:42,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:25:42,500 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:42,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1724260221, now seen corresponding path program 1 times [2020-09-21 12:25:42,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:42,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507404442] [2020-09-21 12:25:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:42,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:42,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:42,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:42,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 12:25:42,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:42,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-09-21 12:25:42,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:42,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:42,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:25:42,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 12:25:42,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:42,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:42,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:42,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:42,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:42,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:42,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:42,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:42,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:42,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:42,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:42,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:42,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507404442] [2020-09-21 12:25:42,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:42,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:42,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276453950] [2020-09-21 12:25:42,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:42,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:42,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:42,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:42,790 INFO L87 Difference]: Start difference. First operand 788 states and 1069 transitions. Second operand 3 states. [2020-09-21 12:25:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:42,841 INFO L93 Difference]: Finished difference Result 2269 states and 3094 transitions. [2020-09-21 12:25:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:42,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-09-21 12:25:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:42,849 INFO L225 Difference]: With dead ends: 2269 [2020-09-21 12:25:42,849 INFO L226 Difference]: Without dead ends: 1517 [2020-09-21 12:25:42,851 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 [2020-09-21 12:25:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2020-09-21 12:25:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1515. [2020-09-21 12:25:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1515 states. [2020-09-21 12:25:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 2050 transitions. [2020-09-21 12:25:42,906 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 2050 transitions. Word has length 60 [2020-09-21 12:25:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:42,907 INFO L479 AbstractCegarLoop]: Abstraction has 1515 states and 2050 transitions. [2020-09-21 12:25:42,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 2050 transitions. [2020-09-21 12:25:42,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 12:25:42,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:42,910 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:25:42,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:25:42,911 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:42,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:42,911 INFO L82 PathProgramCache]: Analyzing trace with hash 625158800, now seen corresponding path program 1 times [2020-09-21 12:25:42,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:42,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472520180] [2020-09-21 12:25:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:42,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:43,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:43,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:43,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-21 12:25:43,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:43,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-09-21 12:25:43,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-21 12:25:43,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-21 12:25:43,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:43,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:43,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:43,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:43,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:43,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:43,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:43,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:43,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:43,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:43,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:43,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:43,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472520180] [2020-09-21 12:25:43,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:43,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:43,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161133955] [2020-09-21 12:25:43,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:43,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:43,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:43,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:43,162 INFO L87 Difference]: Start difference. First operand 1515 states and 2050 transitions. Second operand 3 states. [2020-09-21 12:25:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:43,260 INFO L93 Difference]: Finished difference Result 4431 states and 6020 transitions. [2020-09-21 12:25:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:43,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-09-21 12:25:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:43,274 INFO L225 Difference]: With dead ends: 4431 [2020-09-21 12:25:43,275 INFO L226 Difference]: Without dead ends: 2979 [2020-09-21 12:25:43,278 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 [2020-09-21 12:25:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2020-09-21 12:25:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2265. [2020-09-21 12:25:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2265 states. [2020-09-21 12:25:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 3066 transitions. [2020-09-21 12:25:43,372 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 3066 transitions. Word has length 61 [2020-09-21 12:25:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:43,372 INFO L479 AbstractCegarLoop]: Abstraction has 2265 states and 3066 transitions. [2020-09-21 12:25:43,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 3066 transitions. [2020-09-21 12:25:43,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-21 12:25:43,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:43,377 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:25:43,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:25:43,377 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-09-21 12:25:43,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:43,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452189048] [2020-09-21 12:25:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:25:43,400 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:25:43,400 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:25:43,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:25:43,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:25:43 BoogieIcfgContainer [2020-09-21 12:25:43,437 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:25:43,441 INFO L168 Benchmark]: Toolchain (without parser) took 9697.63 ms. Allocated memory was 143.1 MB in the beginning and 336.1 MB in the end (delta: 192.9 MB). Free memory was 105.5 MB in the beginning and 226.1 MB in the end (delta: -120.6 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:43,442 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.3 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-09-21 12:25:43,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 578.93 ms. Allocated memory was 143.1 MB in the beginning and 205.5 MB in the end (delta: 62.4 MB). Free memory was 105.1 MB in the beginning and 180.9 MB in the end (delta: -75.9 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:43,443 INFO L168 Benchmark]: Boogie Preprocessor took 68.93 ms. Allocated memory is still 205.5 MB. Free memory was 180.9 MB in the beginning and 177.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:43,444 INFO L168 Benchmark]: RCFGBuilder took 896.76 ms. Allocated memory is still 205.5 MB. Free memory was 177.6 MB in the beginning and 124.6 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:43,445 INFO L168 Benchmark]: TraceAbstraction took 8142.49 ms. Allocated memory was 205.5 MB in the beginning and 336.1 MB in the end (delta: 130.5 MB). Free memory was 123.7 MB in the beginning and 226.1 MB in the end (delta: -102.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:43,448 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.3 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 578.93 ms. Allocated memory was 143.1 MB in the beginning and 205.5 MB in the end (delta: 62.4 MB). Free memory was 105.1 MB in the beginning and 180.9 MB in the end (delta: -75.9 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.93 ms. Allocated memory is still 205.5 MB. Free memory was 180.9 MB in the beginning and 177.6 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 896.76 ms. Allocated memory is still 205.5 MB. Free memory was 177.6 MB in the beginning and 124.6 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8142.49 ms. Allocated memory was 205.5 MB in the beginning and 336.1 MB in the end (delta: 130.5 MB). Free memory was 123.7 MB in the beginning and 226.1 MB in the end (delta: -102.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 640]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L645] int s ; [L646] int tmp ; [L650] s = 8464 [L651] CALL ssl3_accept(s) [L11] int s__info_callback = __VERIFIER_nondet_int() ; [L12] int s__in_handshake = __VERIFIER_nondet_int() ; [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] int s__version = __VERIFIER_nondet_int() ; [L17] int s__type ; [L18] int s__init_num ; [L19] int s__hit = __VERIFIER_nondet_int() ; [L20] int s__rwstate ; [L21] int s__init_buf___0 = 1; [L22] int s__debug = __VERIFIER_nondet_int() ; [L23] int s__shutdown ; [L24] int s__cert = __VERIFIER_nondet_int() ; [L25] int s__options = __VERIFIER_nondet_int() ; [L26] int s__verify_mode = __VERIFIER_nondet_int() ; [L27] int s__session__peer = __VERIFIER_nondet_int() ; [L28] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L29] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L33] int s__s3__tmp__cert_request ; [L34] int s__s3__tmp__reuse_message ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L40] int s__session__cipher ; [L41] int buf ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L72] s__s3__tmp__reuse_message = 0 [L73] s__state = initial_state [L74] blastFlag = 0 [L75] tmp = __VERIFIER_nondet_int() [L76] Time = tmp [L77] cb = 0 [L78] ret = -1 [L79] skip = 0 [L80] got_new_session = 0 [L81] COND TRUE s__info_callback != 0 [L82] cb = s__info_callback [L88] s__in_handshake ++ [L89] COND TRUE tmp___1 + 12288 [L90] COND TRUE tmp___2 + 16384 [L94] COND FALSE !(s__cert == 0) [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND TRUE s__state == 8464 [L271] s__shutdown = 0 [L272] ret = __VERIFIER_nondet_int() [L273] COND TRUE blastFlag == 0 [L274] blastFlag = 1 [L276] COND FALSE !(ret <= 0) [L279] got_new_session = 1 [L280] s__state = 8496 [L281] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND FALSE !(state == 8496) [L614] COND FALSE !(\read(s__debug)) [L620] COND TRUE cb != 0 [L621] COND TRUE s__state != state [L622] new_state = s__state [L623] s__state = state [L624] s__state = new_state [L629] skip = 0 [L98] COND TRUE 1 [L100] state = s__state [L101] COND FALSE !(s__state == 12292) [L104] COND FALSE !(s__state == 16384) [L107] COND FALSE !(s__state == 8192) [L110] COND FALSE !(s__state == 24576) [L113] COND FALSE !(s__state == 8195) [L116] COND FALSE !(s__state == 8480) [L119] COND FALSE !(s__state == 8481) [L122] COND FALSE !(s__state == 8482) [L125] COND FALSE !(s__state == 8464) [L128] COND FALSE !(s__state == 8465) [L131] COND FALSE !(s__state == 8466) [L134] COND TRUE s__state == 8496 [L285] ret = __VERIFIER_nondet_int() [L286] COND TRUE blastFlag == 1 [L287] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L292] COND FALSE !(\read(s__hit)) [L295] s__state = 8512 [L297] s__init_num = 0 [L602] COND TRUE ! s__s3__tmp__reuse_message [L603] COND TRUE ! skip [L604] COND TRUE tmp___1 != -12288 [L605] COND TRUE s__state != 8656 [L606] COND TRUE tmp___2 != -16384 [L607] COND TRUE state == 8496 [L640] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 159 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 13, TraceHistogramMax: 2, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2522 SDtfs, 1836 SDslu, 1974 SDs, 0 SdLazy, 790 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2265occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 884 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 553 NumberOfCodeBlocks, 553 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 479 ConstructedInterpolants, 0 QuantifiedInterpolants, 51323 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 57/57 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...