/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_6.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:50:38,788 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 04:50:38,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:50:38,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:50:38,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:50:38,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:50:38,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:50:38,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:50:38,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:50:38,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:50:38,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:50:38,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:50:38,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:50:38,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:50:38,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:50:38,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:50:38,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:50:38,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:50:38,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:50:38,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:50:38,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:50:38,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:50:38,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:50:38,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:50:38,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:50:38,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:50:38,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:50:38,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:50:38,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:50:38,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:50:38,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:50:38,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:50:38,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:50:38,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:50:38,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 04:50:38,894 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:50:38,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:50:38,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:50:38,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:50:38,897 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:50:38,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:50:38,898 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:50:38,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:50:38,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:50:38,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:50:38,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:50:38,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:50:38,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:50:38,900 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:50:38,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:50:38,901 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:50:38,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:50:38,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:50:38,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:50:38,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:50:38,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:50:38,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:50:38,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:50:38,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:50:38,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:50:38,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:50:38,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:50:38,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:50:38,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:50:39,167 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:50:39,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:50:39,185 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:50:39,187 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:50:39,187 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:50:39,188 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_6.cil-2.c [2019-11-07 04:50:39,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992c2a963/a17250944f734afd8fb4fbc95f5231ef/FLAG4e523e91b [2019-11-07 04:50:39,795 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:50:39,796 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_6.cil-2.c [2019-11-07 04:50:39,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992c2a963/a17250944f734afd8fb4fbc95f5231ef/FLAG4e523e91b [2019-11-07 04:50:40,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992c2a963/a17250944f734afd8fb4fbc95f5231ef [2019-11-07 04:50:40,135 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:50:40,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:50:40,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:50:40,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:50:40,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:50:40,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:50:40" (1/1) ... [2019-11-07 04:50:40,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24cc440a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40, skipping insertion in model container [2019-11-07 04:50:40,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:50:40" (1/1) ... [2019-11-07 04:50:40,195 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:50:40,249 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:50:40,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:50:40,541 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:50:40,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:50:40,726 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:50:40,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40 WrapperNode [2019-11-07 04:50:40,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:50:40,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:50:40,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:50:40,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:50:40,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40" (1/1) ... [2019-11-07 04:50:40,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40" (1/1) ... [2019-11-07 04:50:40,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40" (1/1) ... [2019-11-07 04:50:40,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40" (1/1) ... [2019-11-07 04:50:40,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40" (1/1) ... [2019-11-07 04:50:40,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40" (1/1) ... [2019-11-07 04:50:40,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40" (1/1) ... [2019-11-07 04:50:40,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:50:40,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:50:40,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:50:40,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:50:40,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:50:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:50:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:50:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2019-11-07 04:50:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:50:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:50:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-07 04:50:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:50:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-07 04:50:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-11-07 04:50:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2019-11-07 04:50:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:50:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:50:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:50:41,095 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-07 04:50:41,720 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2019-11-07 04:50:41,720 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2019-11-07 04:50:42,106 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:50:42,107 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 04:50:42,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:50:42 BoogieIcfgContainer [2019-11-07 04:50:42,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:50:42,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:50:42,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:50:42,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:50:42,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:50:40" (1/3) ... [2019-11-07 04:50:42,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c573112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:50:42, skipping insertion in model container [2019-11-07 04:50:42,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:40" (2/3) ... [2019-11-07 04:50:42,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c573112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:50:42, skipping insertion in model container [2019-11-07 04:50:42,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:50:42" (3/3) ... [2019-11-07 04:50:42,117 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_6.cil-2.c [2019-11-07 04:50:42,128 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:50:42,136 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:50:42,149 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:50:42,182 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:50:42,182 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:50:42,182 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:50:42,182 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:50:42,182 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:50:42,183 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:50:42,183 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:50:42,183 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:50:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states. [2019-11-07 04:50:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-07 04:50:42,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:42,221 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:42,223 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash 882887444, now seen corresponding path program 1 times [2019-11-07 04:50:42,244 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:42,244 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117265339] [2019-11-07 04:50:42,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:50:42,573 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117265339] [2019-11-07 04:50:42,575 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:42,575 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:42,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104074839] [2019-11-07 04:50:42,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:42,584 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:42,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:42,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:42,601 INFO L87 Difference]: Start difference. First operand 120 states. Second operand 3 states. [2019-11-07 04:50:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:42,795 INFO L93 Difference]: Finished difference Result 337 states and 581 transitions. [2019-11-07 04:50:42,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:42,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-11-07 04:50:42,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:42,812 INFO L225 Difference]: With dead ends: 337 [2019-11-07 04:50:42,813 INFO L226 Difference]: Without dead ends: 215 [2019-11-07 04:50:42,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:42,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-11-07 04:50:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2019-11-07 04:50:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-11-07 04:50:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 322 transitions. [2019-11-07 04:50:42,915 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 322 transitions. Word has length 45 [2019-11-07 04:50:42,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:42,916 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 322 transitions. [2019-11-07 04:50:42,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 322 transitions. [2019-11-07 04:50:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-07 04:50:42,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:42,925 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:42,926 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:42,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1285581883, now seen corresponding path program 1 times [2019-11-07 04:50:42,927 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:42,927 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262315789] [2019-11-07 04:50:42,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:50:43,067 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262315789] [2019-11-07 04:50:43,067 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:43,067 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:43,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998680698] [2019-11-07 04:50:43,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:43,070 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:43,070 INFO L87 Difference]: Start difference. First operand 214 states and 322 transitions. Second operand 3 states. [2019-11-07 04:50:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:43,273 INFO L93 Difference]: Finished difference Result 342 states and 521 transitions. [2019-11-07 04:50:43,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:43,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-11-07 04:50:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:43,277 INFO L225 Difference]: With dead ends: 342 [2019-11-07 04:50:43,277 INFO L226 Difference]: Without dead ends: 237 [2019-11-07 04:50:43,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-11-07 04:50:43,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2019-11-07 04:50:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-11-07 04:50:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 344 transitions. [2019-11-07 04:50:43,310 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 344 transitions. Word has length 59 [2019-11-07 04:50:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:43,311 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 344 transitions. [2019-11-07 04:50:43,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 344 transitions. [2019-11-07 04:50:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-07 04:50:43,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:43,318 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:43,318 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:43,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1868973074, now seen corresponding path program 1 times [2019-11-07 04:50:43,319 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:43,321 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751794847] [2019-11-07 04:50:43,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 04:50:43,474 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751794847] [2019-11-07 04:50:43,474 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:43,475 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:50:43,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658172193] [2019-11-07 04:50:43,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:50:43,476 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:43,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:50:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:50:43,481 INFO L87 Difference]: Start difference. First operand 233 states and 344 transitions. Second operand 4 states. [2019-11-07 04:50:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:43,912 INFO L93 Difference]: Finished difference Result 606 states and 940 transitions. [2019-11-07 04:50:43,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:50:43,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2019-11-07 04:50:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:43,920 INFO L225 Difference]: With dead ends: 606 [2019-11-07 04:50:43,920 INFO L226 Difference]: Without dead ends: 381 [2019-11-07 04:50:43,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:50:43,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2019-11-07 04:50:43,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 349. [2019-11-07 04:50:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2019-11-07 04:50:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 486 transitions. [2019-11-07 04:50:43,964 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 486 transitions. Word has length 76 [2019-11-07 04:50:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:43,965 INFO L462 AbstractCegarLoop]: Abstraction has 349 states and 486 transitions. [2019-11-07 04:50:43,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:50:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 486 transitions. [2019-11-07 04:50:43,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-07 04:50:43,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:43,968 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:43,968 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:43,968 INFO L82 PathProgramCache]: Analyzing trace with hash 998761426, now seen corresponding path program 1 times [2019-11-07 04:50:43,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:43,976 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264408620] [2019-11-07 04:50:43,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 04:50:44,067 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264408620] [2019-11-07 04:50:44,067 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:44,068 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:44,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083020799] [2019-11-07 04:50:44,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:44,070 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:44,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:44,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:44,071 INFO L87 Difference]: Start difference. First operand 349 states and 486 transitions. Second operand 3 states. [2019-11-07 04:50:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:44,218 INFO L93 Difference]: Finished difference Result 720 states and 1012 transitions. [2019-11-07 04:50:44,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:44,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2019-11-07 04:50:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:44,223 INFO L225 Difference]: With dead ends: 720 [2019-11-07 04:50:44,223 INFO L226 Difference]: Without dead ends: 379 [2019-11-07 04:50:44,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-11-07 04:50:44,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 375. [2019-11-07 04:50:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2019-11-07 04:50:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 518 transitions. [2019-11-07 04:50:44,241 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 518 transitions. Word has length 85 [2019-11-07 04:50:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:44,241 INFO L462 AbstractCegarLoop]: Abstraction has 375 states and 518 transitions. [2019-11-07 04:50:44,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 518 transitions. [2019-11-07 04:50:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 04:50:44,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:44,246 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:44,246 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:44,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:44,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2000050562, now seen corresponding path program 1 times [2019-11-07 04:50:44,247 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:44,247 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582504625] [2019-11-07 04:50:44,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 04:50:44,305 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582504625] [2019-11-07 04:50:44,305 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:44,305 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:44,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342029521] [2019-11-07 04:50:44,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:44,306 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:44,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:44,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:44,309 INFO L87 Difference]: Start difference. First operand 375 states and 518 transitions. Second operand 3 states. [2019-11-07 04:50:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:44,436 INFO L93 Difference]: Finished difference Result 756 states and 1046 transitions. [2019-11-07 04:50:44,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:44,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 04:50:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:44,440 INFO L225 Difference]: With dead ends: 756 [2019-11-07 04:50:44,440 INFO L226 Difference]: Without dead ends: 389 [2019-11-07 04:50:44,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2019-11-07 04:50:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2019-11-07 04:50:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-11-07 04:50:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 534 transitions. [2019-11-07 04:50:44,456 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 534 transitions. Word has length 86 [2019-11-07 04:50:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:44,456 INFO L462 AbstractCegarLoop]: Abstraction has 389 states and 534 transitions. [2019-11-07 04:50:44,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 534 transitions. [2019-11-07 04:50:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-07 04:50:44,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:44,458 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:44,459 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash -132862520, now seen corresponding path program 1 times [2019-11-07 04:50:44,459 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:44,460 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380752983] [2019-11-07 04:50:44,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 04:50:44,541 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380752983] [2019-11-07 04:50:44,541 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:44,541 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:44,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48993669] [2019-11-07 04:50:44,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:44,542 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:44,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:44,543 INFO L87 Difference]: Start difference. First operand 389 states and 534 transitions. Second operand 3 states. [2019-11-07 04:50:44,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:44,729 INFO L93 Difference]: Finished difference Result 906 states and 1272 transitions. [2019-11-07 04:50:44,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:44,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2019-11-07 04:50:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:44,734 INFO L225 Difference]: With dead ends: 906 [2019-11-07 04:50:44,734 INFO L226 Difference]: Without dead ends: 519 [2019-11-07 04:50:44,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2019-11-07 04:50:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 511. [2019-11-07 04:50:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2019-11-07 04:50:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 712 transitions. [2019-11-07 04:50:44,753 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 712 transitions. Word has length 87 [2019-11-07 04:50:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:44,757 INFO L462 AbstractCegarLoop]: Abstraction has 511 states and 712 transitions. [2019-11-07 04:50:44,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 712 transitions. [2019-11-07 04:50:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 04:50:44,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:44,763 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:44,763 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:44,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:44,763 INFO L82 PathProgramCache]: Analyzing trace with hash -853897945, now seen corresponding path program 1 times [2019-11-07 04:50:44,764 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:44,764 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974639908] [2019-11-07 04:50:44,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 04:50:44,840 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974639908] [2019-11-07 04:50:44,840 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:44,841 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:44,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884528064] [2019-11-07 04:50:44,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:44,842 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:44,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:44,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:44,842 INFO L87 Difference]: Start difference. First operand 511 states and 712 transitions. Second operand 3 states. [2019-11-07 04:50:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:44,976 INFO L93 Difference]: Finished difference Result 1080 states and 1526 transitions. [2019-11-07 04:50:44,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:44,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-11-07 04:50:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:44,981 INFO L225 Difference]: With dead ends: 1080 [2019-11-07 04:50:44,981 INFO L226 Difference]: Without dead ends: 577 [2019-11-07 04:50:44,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2019-11-07 04:50:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 557. [2019-11-07 04:50:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2019-11-07 04:50:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 764 transitions. [2019-11-07 04:50:45,001 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 764 transitions. Word has length 96 [2019-11-07 04:50:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:45,001 INFO L462 AbstractCegarLoop]: Abstraction has 557 states and 764 transitions. [2019-11-07 04:50:45,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 764 transitions. [2019-11-07 04:50:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-07 04:50:45,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:45,004 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:45,004 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:45,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:45,005 INFO L82 PathProgramCache]: Analyzing trace with hash -263758197, now seen corresponding path program 1 times [2019-11-07 04:50:45,005 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:45,005 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815645092] [2019-11-07 04:50:45,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-07 04:50:45,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815645092] [2019-11-07 04:50:45,085 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:45,085 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:45,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525743523] [2019-11-07 04:50:45,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:45,086 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:45,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:45,087 INFO L87 Difference]: Start difference. First operand 557 states and 764 transitions. Second operand 3 states. [2019-11-07 04:50:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:45,269 INFO L93 Difference]: Finished difference Result 1172 states and 1632 transitions. [2019-11-07 04:50:45,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:45,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-11-07 04:50:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:45,273 INFO L225 Difference]: With dead ends: 1172 [2019-11-07 04:50:45,273 INFO L226 Difference]: Without dead ends: 623 [2019-11-07 04:50:45,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-11-07 04:50:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 607. [2019-11-07 04:50:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-11-07 04:50:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 820 transitions. [2019-11-07 04:50:45,295 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 820 transitions. Word has length 120 [2019-11-07 04:50:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:45,295 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 820 transitions. [2019-11-07 04:50:45,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 820 transitions. [2019-11-07 04:50:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-07 04:50:45,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:45,301 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:45,301 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:45,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1625696356, now seen corresponding path program 1 times [2019-11-07 04:50:45,302 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:45,302 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964602739] [2019-11-07 04:50:45,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 04:50:45,396 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964602739] [2019-11-07 04:50:45,397 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:45,397 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:45,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656487053] [2019-11-07 04:50:45,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:45,399 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:45,400 INFO L87 Difference]: Start difference. First operand 607 states and 820 transitions. Second operand 3 states. [2019-11-07 04:50:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:45,604 INFO L93 Difference]: Finished difference Result 1220 states and 1652 transitions. [2019-11-07 04:50:45,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:45,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-11-07 04:50:45,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:45,608 INFO L225 Difference]: With dead ends: 1220 [2019-11-07 04:50:45,609 INFO L226 Difference]: Without dead ends: 619 [2019-11-07 04:50:45,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-11-07 04:50:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 613. [2019-11-07 04:50:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2019-11-07 04:50:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 824 transitions. [2019-11-07 04:50:45,630 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 824 transitions. Word has length 125 [2019-11-07 04:50:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:45,631 INFO L462 AbstractCegarLoop]: Abstraction has 613 states and 824 transitions. [2019-11-07 04:50:45,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 824 transitions. [2019-11-07 04:50:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 04:50:45,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:45,634 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:45,634 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:45,635 INFO L82 PathProgramCache]: Analyzing trace with hash 905548674, now seen corresponding path program 1 times [2019-11-07 04:50:45,635 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:45,635 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771940691] [2019-11-07 04:50:45,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-07 04:50:45,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771940691] [2019-11-07 04:50:45,697 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:45,698 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:45,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834639568] [2019-11-07 04:50:45,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:45,699 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:45,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:45,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:45,700 INFO L87 Difference]: Start difference. First operand 613 states and 824 transitions. Second operand 3 states. [2019-11-07 04:50:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:45,857 INFO L93 Difference]: Finished difference Result 1276 states and 1738 transitions. [2019-11-07 04:50:45,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:45,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-11-07 04:50:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:45,862 INFO L225 Difference]: With dead ends: 1276 [2019-11-07 04:50:45,862 INFO L226 Difference]: Without dead ends: 671 [2019-11-07 04:50:45,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2019-11-07 04:50:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 667. [2019-11-07 04:50:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2019-11-07 04:50:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 884 transitions. [2019-11-07 04:50:45,901 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 884 transitions. Word has length 142 [2019-11-07 04:50:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:45,902 INFO L462 AbstractCegarLoop]: Abstraction has 667 states and 884 transitions. [2019-11-07 04:50:45,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 884 transitions. [2019-11-07 04:50:45,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 04:50:45,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:45,905 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:45,905 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:45,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:45,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1201915860, now seen corresponding path program 1 times [2019-11-07 04:50:45,906 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:45,906 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942688964] [2019-11-07 04:50:45,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-07 04:50:45,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942688964] [2019-11-07 04:50:45,963 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:45,963 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:45,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396335094] [2019-11-07 04:50:45,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:45,964 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:45,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:45,964 INFO L87 Difference]: Start difference. First operand 667 states and 884 transitions. Second operand 3 states. [2019-11-07 04:50:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:46,122 INFO L93 Difference]: Finished difference Result 1384 states and 1862 transitions. [2019-11-07 04:50:46,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:46,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2019-11-07 04:50:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:46,127 INFO L225 Difference]: With dead ends: 1384 [2019-11-07 04:50:46,127 INFO L226 Difference]: Without dead ends: 725 [2019-11-07 04:50:46,129 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2019-11-07 04:50:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 725. [2019-11-07 04:50:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-11-07 04:50:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 948 transitions. [2019-11-07 04:50:46,157 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 948 transitions. Word has length 147 [2019-11-07 04:50:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:46,158 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 948 transitions. [2019-11-07 04:50:46,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 948 transitions. [2019-11-07 04:50:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-07 04:50:46,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:46,161 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:46,162 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:46,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:46,162 INFO L82 PathProgramCache]: Analyzing trace with hash -2107800550, now seen corresponding path program 1 times [2019-11-07 04:50:46,162 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:46,162 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805470799] [2019-11-07 04:50:46,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-07 04:50:46,274 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805470799] [2019-11-07 04:50:46,274 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072805345] [2019-11-07 04:50:46,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:50:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:46,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:50:46,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:50:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-07 04:50:46,574 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:50:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-07 04:50:46,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371757095] [2019-11-07 04:50:46,776 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2019-11-07 04:50:46,776 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:50:46,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:50:46,792 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:50:46,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:50:46,853 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 04:50:46,862 INFO L197 IcfgInterpreter]: Interpreting procedure ssl3_accept with input of size 3 for LOIs [2019-11-07 04:50:47,131 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2019-11-07 04:50:47,423 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2019-11-07 04:50:47,666 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 201 [2019-11-07 04:50:47,806 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2019-11-07 04:50:48,123 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-11-07 04:50:48,260 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 186 [2019-11-07 04:50:48,407 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2019-11-07 04:50:52,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 04:50:52,257 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:50:53,449 WARN L191 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 262 DAG size of output: 152 [2019-11-07 04:50:54,155 WARN L191 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 145 [2019-11-07 04:50:54,857 WARN L191 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 143 [2019-11-07 04:50:55,569 WARN L191 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 146 [2019-11-07 04:50:56,417 WARN L191 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 149 [2019-11-07 04:50:57,200 WARN L191 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 152 [2019-11-07 04:50:57,957 WARN L191 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 155 [2019-11-07 04:51:00,060 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 177 DAG size of output: 164 [2019-11-07 04:51:02,236 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 180 DAG size of output: 167 [2019-11-07 04:51:04,360 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 183 DAG size of output: 170 [2019-11-07 04:51:06,447 WARN L191 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 186 DAG size of output: 173 [2019-11-07 04:51:08,688 WARN L191 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 189 DAG size of output: 176 [2019-11-07 04:51:09,837 WARN L191 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 190 DAG size of output: 150 [2019-11-07 04:51:11,042 WARN L191 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 202 DAG size of output: 156 [2019-11-07 04:51:11,832 WARN L191 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 150 [2019-11-07 04:51:13,273 WARN L191 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 188 DAG size of output: 173 [2019-11-07 04:51:14,700 WARN L191 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 191 DAG size of output: 176 [2019-11-07 04:51:16,138 WARN L191 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 194 DAG size of output: 179 [2019-11-07 04:51:17,086 WARN L191 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 150 [2019-11-07 04:51:18,043 WARN L191 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 154 [2019-11-07 04:51:19,478 WARN L191 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 197 DAG size of output: 182