/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 enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -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 0.1.25-5644d1e-m [2020-08-18 17:05:14,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:05:14,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:05:14,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:05:14,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:05:14,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:05:14,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:05:14,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:05:14,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:05:14,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:05:14,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:05:14,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:05:14,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:05:14,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:05:14,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:05:14,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:05:14,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:05:14,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:05:14,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:05:14,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:05:14,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:05:14,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:05:14,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:05:14,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:05:14,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:05:14,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:05:14,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:05:14,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:05:14,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:05:14,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:05:14,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:05:14,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:05:14,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:05:14,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:05:14,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:05:14,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:05:14,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:05:14,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:05:14,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:05:14,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:05:14,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:05:14,395 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 [2020-08-18 17:05:14,438 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:05:14,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:05:14,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:05:14,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:05:14,443 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:05:14,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:05:14,443 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:05:14,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:05:14,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:05:14,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:05:14,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:05:14,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:05:14,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:05:14,446 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:05:14,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:05:14,446 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:05:14,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:05:14,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:05:14,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:05:14,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:05:14,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:05:14,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:05:14,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:05:14,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:05:14,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:05:14,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:05:14,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:05:14,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:05:14,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:05:14,449 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 -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:05:14,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:05:14,757 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:05:14,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:05:14,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:05:14,769 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:05:14,769 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-18 17:05:14,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee741b39b/5e6727c62b6d4df9952b6bb85898bc5b/FLAG089ad9ca1 [2020-08-18 17:05:15,313 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:05:15,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c [2020-08-18 17:05:15,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee741b39b/5e6727c62b6d4df9952b6bb85898bc5b/FLAG089ad9ca1 [2020-08-18 17:05:15,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee741b39b/5e6727c62b6d4df9952b6bb85898bc5b [2020-08-18 17:05:15,625 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:05:15,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:05:15,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:05:15,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:05:15,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:05:15,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:05:15" (1/1) ... [2020-08-18 17:05:15,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@322014a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:15, skipping insertion in model container [2020-08-18 17:05:15,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:05:15" (1/1) ... [2020-08-18 17:05:15,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:05:15,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:05:15,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:05:15,960 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:05:16,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:05:16,138 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:05:16,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16 WrapperNode [2020-08-18 17:05:16,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:05:16,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:05:16,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:05:16,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:05:16,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:16,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:16,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:16,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:16,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:16,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:16,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:16,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:05:16,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:05:16,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:05:16,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:05:16,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (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 [2020-08-18 17:05:16,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:05:16,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:05:16,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-18 17:05:16,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:05:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:05:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 17:05:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:05:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-18 17:05:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-18 17:05:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:05:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:05:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:05:16,492 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 17:05:17,049 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-18 17:05:17,050 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-18 17:05:17,062 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:05:17,062 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:05:17,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:05:17 BoogieIcfgContainer [2020-08-18 17:05:17,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:05:17,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:05:17,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:05:17,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:05:17,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:05:15" (1/3) ... [2020-08-18 17:05:17,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14541272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:05:17, skipping insertion in model container [2020-08-18 17:05:17,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (2/3) ... [2020-08-18 17:05:17,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14541272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:05:17, skipping insertion in model container [2020-08-18 17:05:17,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:05:17" (3/3) ... [2020-08-18 17:05:17,078 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-08-18 17:05:17,090 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:05:17,098 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:05:17,114 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:05:17,140 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:05:17,141 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:05:17,143 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:05:17,143 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:05:17,143 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:05:17,143 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:05:17,143 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:05:17,143 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:05:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-08-18 17:05:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:05:17,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:17,192 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] [2020-08-18 17:05:17,193 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:17,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times [2020-08-18 17:05:17,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:17,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824887591] [2020-08-18 17:05:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:17,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:17,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824887591] [2020-08-18 17:05:17,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:17,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:17,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332319049] [2020-08-18 17:05:17,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:17,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:17,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:17,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:17,523 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 5 states. [2020-08-18 17:05:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:17,979 INFO L93 Difference]: Finished difference Result 375 states and 646 transitions. [2020-08-18 17:05:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:17,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-18 17:05:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:17,995 INFO L225 Difference]: With dead ends: 375 [2020-08-18 17:05:17,996 INFO L226 Difference]: Without dead ends: 194 [2020-08-18 17:05:18,001 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 [2020-08-18 17:05:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-18 17:05:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2020-08-18 17:05:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 17:05:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions. [2020-08-18 17:05:18,058 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28 [2020-08-18 17:05:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,059 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 279 transitions. [2020-08-18 17:05:18,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions. [2020-08-18 17:05:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:05:18,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,061 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] [2020-08-18 17:05:18,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:05:18,061 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,062 INFO L82 PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times [2020-08-18 17:05:18,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674749918] [2020-08-18 17:05:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674749918] [2020-08-18 17:05:18,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:05:18,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670341907] [2020-08-18 17:05:18,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:05:18,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:05:18,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:05:18,170 INFO L87 Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states. [2020-08-18 17:05:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,513 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2020-08-18 17:05:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:05:18,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-08-18 17:05:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,517 INFO L225 Difference]: With dead ends: 448 [2020-08-18 17:05:18,518 INFO L226 Difference]: Without dead ends: 260 [2020-08-18 17:05:18,520 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 [2020-08-18 17:05:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-18 17:05:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2020-08-18 17:05:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-08-18 17:05:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions. [2020-08-18 17:05:18,551 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31 [2020-08-18 17:05:18,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,551 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 372 transitions. [2020-08-18 17:05:18,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:05:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions. [2020-08-18 17:05:18,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-18 17:05:18,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,558 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] [2020-08-18 17:05:18,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:05:18,559 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,560 INFO L82 PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times [2020-08-18 17:05:18,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151765502] [2020-08-18 17:05:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151765502] [2020-08-18 17:05:18,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:18,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567568102] [2020-08-18 17:05:18,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:18,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:18,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,673 INFO L87 Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states. [2020-08-18 17:05:18,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,722 INFO L93 Difference]: Finished difference Result 698 states and 1061 transitions. [2020-08-18 17:05:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:18,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-08-18 17:05:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,731 INFO L225 Difference]: With dead ends: 698 [2020-08-18 17:05:18,732 INFO L226 Difference]: Without dead ends: 466 [2020-08-18 17:05:18,737 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 [2020-08-18 17:05:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-08-18 17:05:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2020-08-18 17:05:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-08-18 17:05:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions. [2020-08-18 17:05:18,790 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32 [2020-08-18 17:05:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,791 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 701 transitions. [2020-08-18 17:05:18,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:18,791 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions. [2020-08-18 17:05:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 17:05:18,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,793 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] [2020-08-18 17:05:18,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:05:18,793 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times [2020-08-18 17:05:18,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526453769] [2020-08-18 17:05:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526453769] [2020-08-18 17:05:18,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:05:18,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432641521] [2020-08-18 17:05:18,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:05:18,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:05:18,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:05:18,898 INFO L87 Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states. [2020-08-18 17:05:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,231 INFO L93 Difference]: Finished difference Result 1155 states and 1779 transitions. [2020-08-18 17:05:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:05:19,232 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-18 17:05:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,238 INFO L225 Difference]: With dead ends: 1155 [2020-08-18 17:05:19,239 INFO L226 Difference]: Without dead ends: 655 [2020-08-18 17:05:19,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:05:19,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-08-18 17:05:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526. [2020-08-18 17:05:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-18 17:05:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions. [2020-08-18 17:05:19,279 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33 [2020-08-18 17:05:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,280 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 799 transitions. [2020-08-18 17:05:19,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:05:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions. [2020-08-18 17:05:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 17:05:19,292 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,292 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 17:05:19,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:05:19,293 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times [2020-08-18 17:05:19,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364457841] [2020-08-18 17:05:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364457841] [2020-08-18 17:05:19,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858333174] [2020-08-18 17:05:19,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,401 INFO L87 Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states. [2020-08-18 17:05:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,420 INFO L93 Difference]: Finished difference Result 1038 states and 1580 transitions. [2020-08-18 17:05:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-08-18 17:05:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,424 INFO L225 Difference]: With dead ends: 1038 [2020-08-18 17:05:19,425 INFO L226 Difference]: Without dead ends: 526 [2020-08-18 17:05:19,426 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 [2020-08-18 17:05:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-08-18 17:05:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2020-08-18 17:05:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2020-08-18 17:05:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions. [2020-08-18 17:05:19,447 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45 [2020-08-18 17:05:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,447 INFO L479 AbstractCegarLoop]: Abstraction has 526 states and 786 transitions. [2020-08-18 17:05:19,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions. [2020-08-18 17:05:19,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-18 17:05:19,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,449 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 17:05:19,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:05:19,450 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times [2020-08-18 17:05:19,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585316033] [2020-08-18 17:05:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585316033] [2020-08-18 17:05:19,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778192463] [2020-08-18 17:05:19,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,519 INFO L87 Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states. [2020-08-18 17:05:19,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,563 INFO L93 Difference]: Finished difference Result 1048 states and 1566 transitions. [2020-08-18 17:05:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-08-18 17:05:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,568 INFO L225 Difference]: With dead ends: 1048 [2020-08-18 17:05:19,568 INFO L226 Difference]: Without dead ends: 536 [2020-08-18 17:05:19,570 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 [2020-08-18 17:05:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-08-18 17:05:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534. [2020-08-18 17:05:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-08-18 17:05:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions. [2020-08-18 17:05:19,593 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46 [2020-08-18 17:05:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,594 INFO L479 AbstractCegarLoop]: Abstraction has 534 states and 783 transitions. [2020-08-18 17:05:19,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions. [2020-08-18 17:05:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 17:05:19,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,596 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] [2020-08-18 17:05:19,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:05:19,597 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times [2020-08-18 17:05:19,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840031156] [2020-08-18 17:05:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840031156] [2020-08-18 17:05:19,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353472275] [2020-08-18 17:05:19,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,669 INFO L87 Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states. [2020-08-18 17:05:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,928 INFO L93 Difference]: Finished difference Result 1234 states and 1810 transitions. [2020-08-18 17:05:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-08-18 17:05:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,933 INFO L225 Difference]: With dead ends: 1234 [2020-08-18 17:05:19,934 INFO L226 Difference]: Without dead ends: 670 [2020-08-18 17:05:19,936 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 [2020-08-18 17:05:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-08-18 17:05:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585. [2020-08-18 17:05:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-08-18 17:05:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions. [2020-08-18 17:05:19,964 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50 [2020-08-18 17:05:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,964 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 857 transitions. [2020-08-18 17:05:19,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions. [2020-08-18 17:05:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 17:05:19,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,967 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] [2020-08-18 17:05:19,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:05:19,967 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times [2020-08-18 17:05:19,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355711415] [2020-08-18 17:05:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:20,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355711415] [2020-08-18 17:05:20,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:20,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:20,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258038115] [2020-08-18 17:05:20,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:20,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:20,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:20,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,065 INFO L87 Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states. [2020-08-18 17:05:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:20,127 INFO L93 Difference]: Finished difference Result 1720 states and 2523 transitions. [2020-08-18 17:05:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:20,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-18 17:05:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:20,134 INFO L225 Difference]: With dead ends: 1720 [2020-08-18 17:05:20,135 INFO L226 Difference]: Without dead ends: 1149 [2020-08-18 17:05:20,137 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 [2020-08-18 17:05:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-08-18 17:05:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883. [2020-08-18 17:05:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-08-18 17:05:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions. [2020-08-18 17:05:20,189 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51 [2020-08-18 17:05:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:20,192 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions. [2020-08-18 17:05:20,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions. [2020-08-18 17:05:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 17:05:20,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:20,194 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] [2020-08-18 17:05:20,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:05:20,195 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times [2020-08-18 17:05:20,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:20,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483161029] [2020-08-18 17:05:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:20,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483161029] [2020-08-18 17:05:20,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:20,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:20,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301557287] [2020-08-18 17:05:20,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:20,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:20,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,273 INFO L87 Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states. [2020-08-18 17:05:20,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:20,342 INFO L93 Difference]: Finished difference Result 2602 states and 3797 transitions. [2020-08-18 17:05:20,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:20,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-18 17:05:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:20,354 INFO L225 Difference]: With dead ends: 2602 [2020-08-18 17:05:20,357 INFO L226 Difference]: Without dead ends: 1734 [2020-08-18 17:05:20,359 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 [2020-08-18 17:05:20,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-18 17:05:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732. [2020-08-18 17:05:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1732 states. [2020-08-18 17:05:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions. [2020-08-18 17:05:20,487 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51 [2020-08-18 17:05:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:20,487 INFO L479 AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions. [2020-08-18 17:05:20,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:20,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions. [2020-08-18 17:05:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-18 17:05:20,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:20,490 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] [2020-08-18 17:05:20,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:05:20,491 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:20,492 INFO L82 PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times [2020-08-18 17:05:20,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:20,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643855483] [2020-08-18 17:05:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:20,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643855483] [2020-08-18 17:05:20,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:20,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:20,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887371999] [2020-08-18 17:05:20,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:20,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:20,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:20,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,553 INFO L87 Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states. [2020-08-18 17:05:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:20,743 INFO L93 Difference]: Finished difference Result 3635 states and 5182 transitions. [2020-08-18 17:05:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:20,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-08-18 17:05:20,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:20,754 INFO L225 Difference]: With dead ends: 3635 [2020-08-18 17:05:20,754 INFO L226 Difference]: Without dead ends: 1924 [2020-08-18 17:05:20,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2020-08-18 17:05:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835. [2020-08-18 17:05:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-18 17:05:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions. [2020-08-18 17:05:20,833 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52 [2020-08-18 17:05:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:20,834 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions. [2020-08-18 17:05:20,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:20,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions. [2020-08-18 17:05:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 17:05:20,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:20,836 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 17:05:20,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:05:20,836 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times [2020-08-18 17:05:20,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:20,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82851245] [2020-08-18 17:05:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:20,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82851245] [2020-08-18 17:05:20,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:20,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:20,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348315015] [2020-08-18 17:05:20,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:20,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:20,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:20,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,899 INFO L87 Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states. [2020-08-18 17:05:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:21,082 INFO L93 Difference]: Finished difference Result 3747 states and 5296 transitions. [2020-08-18 17:05:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:21,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-18 17:05:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:21,092 INFO L225 Difference]: With dead ends: 3747 [2020-08-18 17:05:21,092 INFO L226 Difference]: Without dead ends: 1933 [2020-08-18 17:05:21,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-08-18 17:05:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835. [2020-08-18 17:05:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-18 17:05:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions. [2020-08-18 17:05:21,202 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53 [2020-08-18 17:05:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:21,204 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions. [2020-08-18 17:05:21,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions. [2020-08-18 17:05:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 17:05:21,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:21,205 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 17:05:21,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:05:21,206 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:21,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:21,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times [2020-08-18 17:05:21,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:21,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672957471] [2020-08-18 17:05:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:21,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672957471] [2020-08-18 17:05:21,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:21,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:21,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362537996] [2020-08-18 17:05:21,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:21,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:21,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:21,270 INFO L87 Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states. [2020-08-18 17:05:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:21,450 INFO L93 Difference]: Finished difference Result 3744 states and 5269 transitions. [2020-08-18 17:05:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:21,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-08-18 17:05:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:21,463 INFO L225 Difference]: With dead ends: 3744 [2020-08-18 17:05:21,463 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 17:05:21,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 17:05:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835. [2020-08-18 17:05:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-08-18 17:05:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions. [2020-08-18 17:05:21,535 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53 [2020-08-18 17:05:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:21,537 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions. [2020-08-18 17:05:21,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions. [2020-08-18 17:05:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 17:05:21,539 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:21,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:21,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:05:21,540 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:21,540 INFO L82 PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times [2020-08-18 17:05:21,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:21,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830299439] [2020-08-18 17:05:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:21,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830299439] [2020-08-18 17:05:21,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:21,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:21,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700885769] [2020-08-18 17:05:21,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:21,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:21,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:21,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:21,586 INFO L87 Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states. [2020-08-18 17:05:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:21,774 INFO L93 Difference]: Finished difference Result 3741 states and 5251 transitions. [2020-08-18 17:05:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:21,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-08-18 17:05:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:21,783 INFO L225 Difference]: With dead ends: 3741 [2020-08-18 17:05:21,784 INFO L226 Difference]: Without dead ends: 1891 [2020-08-18 17:05:21,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2020-08-18 17:05:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871. [2020-08-18 17:05:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-18 17:05:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions. [2020-08-18 17:05:21,873 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56 [2020-08-18 17:05:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:21,873 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions. [2020-08-18 17:05:21,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions. [2020-08-18 17:05:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 17:05:21,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:21,875 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:21,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:05:21,876 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:21,876 INFO L82 PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times [2020-08-18 17:05:21,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:21,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367911336] [2020-08-18 17:05:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:21,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367911336] [2020-08-18 17:05:21,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:21,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:21,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986507756] [2020-08-18 17:05:21,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:21,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:21,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:21,930 INFO L87 Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states. [2020-08-18 17:05:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:22,153 INFO L93 Difference]: Finished difference Result 3810 states and 5283 transitions. [2020-08-18 17:05:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:22,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-08-18 17:05:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:22,164 INFO L225 Difference]: With dead ends: 3810 [2020-08-18 17:05:22,165 INFO L226 Difference]: Without dead ends: 1960 [2020-08-18 17:05:22,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-08-18 17:05:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871. [2020-08-18 17:05:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1871 states. [2020-08-18 17:05:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions. [2020-08-18 17:05:22,235 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57 [2020-08-18 17:05:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:22,235 INFO L479 AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions. [2020-08-18 17:05:22,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions. [2020-08-18 17:05:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-18 17:05:22,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:22,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:22,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:05:22,237 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:22,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times [2020-08-18 17:05:22,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:22,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047093513] [2020-08-18 17:05:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:22,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047093513] [2020-08-18 17:05:22,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:22,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:22,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36630080] [2020-08-18 17:05:22,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:22,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:22,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:22,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:22,281 INFO L87 Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states. [2020-08-18 17:05:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:22,480 INFO L93 Difference]: Finished difference Result 3946 states and 5421 transitions. [2020-08-18 17:05:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:22,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-08-18 17:05:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:22,490 INFO L225 Difference]: With dead ends: 3946 [2020-08-18 17:05:22,491 INFO L226 Difference]: Without dead ends: 2096 [2020-08-18 17:05:22,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2020-08-18 17:05:22,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004. [2020-08-18 17:05:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2004 states. [2020-08-18 17:05:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions. [2020-08-18 17:05:22,564 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58 [2020-08-18 17:05:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:22,565 INFO L479 AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions. [2020-08-18 17:05:22,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions. [2020-08-18 17:05:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 17:05:22,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:22,567 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] [2020-08-18 17:05:22,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:05:22,568 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times [2020-08-18 17:05:22,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:22,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268257137] [2020-08-18 17:05:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-18 17:05:22,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268257137] [2020-08-18 17:05:22,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:22,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:22,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915626096] [2020-08-18 17:05:22,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:22,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:22,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:22,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:22,638 INFO L87 Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states. [2020-08-18 17:05:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:22,849 INFO L93 Difference]: Finished difference Result 4276 states and 5918 transitions. [2020-08-18 17:05:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:22,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-18 17:05:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:22,860 INFO L225 Difference]: With dead ends: 4276 [2020-08-18 17:05:22,860 INFO L226 Difference]: Without dead ends: 2293 [2020-08-18 17:05:22,864 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 [2020-08-18 17:05:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2020-08-18 17:05:22,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257. [2020-08-18 17:05:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2020-08-18 17:05:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions. [2020-08-18 17:05:22,935 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61 [2020-08-18 17:05:22,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:22,935 INFO L479 AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions. [2020-08-18 17:05:22,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions. [2020-08-18 17:05:22,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 17:05:22,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:22,937 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] [2020-08-18 17:05:22,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:05:22,938 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:22,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times [2020-08-18 17:05:22,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:22,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396822486] [2020-08-18 17:05:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 17:05:22,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396822486] [2020-08-18 17:05:22,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:22,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:22,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201449003] [2020-08-18 17:05:22,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:22,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:22,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:22,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:22,987 INFO L87 Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states. [2020-08-18 17:05:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,055 INFO L93 Difference]: Finished difference Result 4420 states and 5869 transitions. [2020-08-18 17:05:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:23,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-08-18 17:05:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,069 INFO L225 Difference]: With dead ends: 4420 [2020-08-18 17:05:23,069 INFO L226 Difference]: Without dead ends: 2947 [2020-08-18 17:05:23,073 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 [2020-08-18 17:05:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2020-08-18 17:05:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227. [2020-08-18 17:05:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2227 states. [2020-08-18 17:05:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions. [2020-08-18 17:05:23,160 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61 [2020-08-18 17:05:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,161 INFO L479 AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions. [2020-08-18 17:05:23,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions. [2020-08-18 17:05:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 17:05:23,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,164 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] [2020-08-18 17:05:23,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:05:23,164 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times [2020-08-18 17:05:23,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258221519] [2020-08-18 17:05:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:05:23,186 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:05:23,187 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:05:23,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 17:05:23,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:05:23 BoogieIcfgContainer [2020-08-18 17:05:23,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:05:23,226 INFO L168 Benchmark]: Toolchain (without parser) took 7596.01 ms. Allocated memory was 140.5 MB in the beginning and 325.6 MB in the end (delta: 185.1 MB). Free memory was 103.4 MB in the beginning and 114.8 MB in the end (delta: -11.3 MB). Peak memory consumption was 173.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:23,226 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-18 17:05:23,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 511.64 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 103.4 MB in the beginning and 179.2 MB in the end (delta: -75.8 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:23,230 INFO L168 Benchmark]: Boogie Preprocessor took 71.90 ms. Allocated memory is still 204.5 MB. Free memory was 179.2 MB in the beginning and 176.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:23,233 INFO L168 Benchmark]: RCFGBuilder took 857.03 ms. Allocated memory is still 204.5 MB. Free memory was 176.2 MB in the beginning and 123.3 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:23,234 INFO L168 Benchmark]: TraceAbstraction took 6150.27 ms. Allocated memory was 204.5 MB in the beginning and 325.6 MB in the end (delta: 121.1 MB). Free memory was 122.3 MB in the beginning and 114.8 MB in the end (delta: 7.5 MB). Peak memory consumption was 128.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:23,237 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 511.64 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 103.4 MB in the beginning and 179.2 MB in the end (delta: -75.8 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.90 ms. Allocated memory is still 204.5 MB. Free memory was 179.2 MB in the beginning and 176.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 857.03 ms. Allocated memory is still 204.5 MB. Free memory was 176.2 MB in the beginning and 123.3 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6150.27 ms. Allocated memory was 204.5 MB in the beginning and 325.6 MB in the end (delta: 121.1 MB). Free memory was 122.3 MB in the beginning and 114.8 MB in the end (delta: 7.5 MB). Peak memory consumption was 128.6 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: 6.0s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3811 SDtfs, 3555 SDslu, 2450 SDs, 0 SdLazy, 1370 SolverSat, 407 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2257occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 880 NumberOfCodeBlocks, 880 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 88846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 188/188 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...