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_8.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:31:23,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:31:23,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:31:23,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:31:23,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:31:23,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:31:23,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:31:23,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:31:23,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:31:23,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:31:23,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:31:23,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:31:23,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:31:23,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:31:23,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:31:23,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:31:23,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:31:23,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:31:23,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:31:23,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:31:23,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:31:23,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:31:23,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:31:23,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:31:23,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:31:23,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:31:23,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:31:23,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:31:23,609 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 [2019-10-15 03:31:23,626 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:31:23,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:31:23,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:31:23,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:31:23,628 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:31:23,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:31:23,628 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:31:23,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:31:23,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:31:23,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:31:23,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:31:23,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:31:23,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:31:23,632 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:31:23,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:31:23,632 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:31:23,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:31:23,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:31:23,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:31:23,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:31:23,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:31:23,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:23,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:31:23,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:31:23,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:31:23,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:31:23,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:31:23,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:31:23,636 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 [2019-10-15 03:31:23,915 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:31:23,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:31:23,939 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:31:23,941 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:31:23,941 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:31:23,942 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_8.cil.c [2019-10-15 03:31:24,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ee9e482/89e1f0e5218742a39a8a5929ae4756a2/FLAG5b40b0a5d [2019-10-15 03:31:24,600 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:31:24,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_8.cil.c [2019-10-15 03:31:24,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ee9e482/89e1f0e5218742a39a8a5929ae4756a2/FLAG5b40b0a5d [2019-10-15 03:31:24,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ee9e482/89e1f0e5218742a39a8a5929ae4756a2 [2019-10-15 03:31:24,867 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:31:24,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:31:24,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:24,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:31:24,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:31:24,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:24" (1/1) ... [2019-10-15 03:31:24,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4cf4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:24, skipping insertion in model container [2019-10-15 03:31:24,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:24" (1/1) ... [2019-10-15 03:31:24,885 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:31:24,931 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:31:25,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:25,292 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:31:25,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:25,501 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:31:25,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:25 WrapperNode [2019-10-15 03:31:25,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:25,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:31:25,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:31:25,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:31:25,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:25" (1/1) ... [2019-10-15 03:31:25,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:25" (1/1) ... [2019-10-15 03:31:25,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:25" (1/1) ... [2019-10-15 03:31:25,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:25" (1/1) ... [2019-10-15 03:31:25,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:25" (1/1) ... [2019-10-15 03:31:25,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:25" (1/1) ... [2019-10-15 03:31:25,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:25" (1/1) ... [2019-10-15 03:31:25,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:31:25,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:31:25,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:31:25,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:31:25,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:25" (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 [2019-10-15 03:31:25,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:31:25,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:31:25,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2019-10-15 03:31:25,635 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:31:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:31:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-15 03:31:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:31:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-15 03:31:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-15 03:31:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2019-10-15 03:31:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:31:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:31:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:31:25,898 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-15 03:31:26,618 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2019-10-15 03:31:26,619 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2019-10-15 03:31:26,996 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:31:26,996 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:31:26,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:26 BoogieIcfgContainer [2019-10-15 03:31:26,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:31:26,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:31:26,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:31:27,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:31:27,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:31:24" (1/3) ... [2019-10-15 03:31:27,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c11e6ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:27, skipping insertion in model container [2019-10-15 03:31:27,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:25" (2/3) ... [2019-10-15 03:31:27,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c11e6ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:27, skipping insertion in model container [2019-10-15 03:31:27,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:26" (3/3) ... [2019-10-15 03:31:27,009 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_8.cil.c [2019-10-15 03:31:27,020 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:31:27,029 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:31:27,041 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:31:27,081 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:31:27,082 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:31:27,082 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:31:27,082 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:31:27,082 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:31:27,083 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:31:27,083 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:31:27,083 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:31:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states. [2019-10-15 03:31:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 03:31:27,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:27,137 INFO L380 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] [2019-10-15 03:31:27,139 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:27,148 INFO L82 PathProgramCache]: Analyzing trace with hash -973265365, now seen corresponding path program 1 times [2019-10-15 03:31:27,160 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:27,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756637204] [2019-10-15 03:31:27,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:27,161 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:27,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:31:27,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756637204] [2019-10-15 03:31:27,498 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:27,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:27,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580665956] [2019-10-15 03:31:27,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:27,505 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:27,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:27,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:27,523 INFO L87 Difference]: Start difference. First operand 118 states. Second operand 3 states. [2019-10-15 03:31:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:27,670 INFO L93 Difference]: Finished difference Result 331 states and 569 transitions. [2019-10-15 03:31:27,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:27,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-15 03:31:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:27,704 INFO L225 Difference]: With dead ends: 331 [2019-10-15 03:31:27,704 INFO L226 Difference]: Without dead ends: 211 [2019-10-15 03:31:27,713 INFO L600 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 [2019-10-15 03:31:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-10-15 03:31:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2019-10-15 03:31:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-10-15 03:31:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 316 transitions. [2019-10-15 03:31:27,845 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 316 transitions. Word has length 43 [2019-10-15 03:31:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:27,849 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 316 transitions. [2019-10-15 03:31:27,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 316 transitions. [2019-10-15 03:31:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 03:31:27,855 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:27,856 INFO L380 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] [2019-10-15 03:31:27,856 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:27,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash 306680252, now seen corresponding path program 1 times [2019-10-15 03:31:27,857 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:27,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551953956] [2019-10-15 03:31:27,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:27,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:27,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:31:27,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551953956] [2019-10-15 03:31:27,982 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:27,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:27,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187018056] [2019-10-15 03:31:27,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:27,985 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:27,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:27,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:27,986 INFO L87 Difference]: Start difference. First operand 210 states and 316 transitions. Second operand 3 states. [2019-10-15 03:31:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:28,225 INFO L93 Difference]: Finished difference Result 336 states and 511 transitions. [2019-10-15 03:31:28,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:28,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2019-10-15 03:31:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:28,234 INFO L225 Difference]: With dead ends: 336 [2019-10-15 03:31:28,234 INFO L226 Difference]: Without dead ends: 233 [2019-10-15 03:31:28,239 INFO L600 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 [2019-10-15 03:31:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-10-15 03:31:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2019-10-15 03:31:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-10-15 03:31:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 338 transitions. [2019-10-15 03:31:28,278 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 338 transitions. Word has length 57 [2019-10-15 03:31:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:28,279 INFO L462 AbstractCegarLoop]: Abstraction has 229 states and 338 transitions. [2019-10-15 03:31:28,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 338 transitions. [2019-10-15 03:31:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-15 03:31:28,290 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:28,292 INFO L380 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] [2019-10-15 03:31:28,293 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:28,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1578321318, now seen corresponding path program 1 times [2019-10-15 03:31:28,294 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:28,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79979773] [2019-10-15 03:31:28,294 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:28,295 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:28,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:31:28,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79979773] [2019-10-15 03:31:28,483 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:28,487 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:31:28,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350765649] [2019-10-15 03:31:28,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:28,489 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:28,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:28,491 INFO L87 Difference]: Start difference. First operand 229 states and 338 transitions. Second operand 4 states. [2019-10-15 03:31:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:28,847 INFO L93 Difference]: Finished difference Result 598 states and 928 transitions. [2019-10-15 03:31:28,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:28,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2019-10-15 03:31:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:28,853 INFO L225 Difference]: With dead ends: 598 [2019-10-15 03:31:28,853 INFO L226 Difference]: Without dead ends: 377 [2019-10-15 03:31:28,858 INFO L600 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 [2019-10-15 03:31:28,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-10-15 03:31:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 345. [2019-10-15 03:31:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2019-10-15 03:31:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 480 transitions. [2019-10-15 03:31:28,901 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 480 transitions. Word has length 74 [2019-10-15 03:31:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:28,903 INFO L462 AbstractCegarLoop]: Abstraction has 345 states and 480 transitions. [2019-10-15 03:31:28,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 480 transitions. [2019-10-15 03:31:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-15 03:31:28,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:28,910 INFO L380 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] [2019-10-15 03:31:28,910 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:28,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1479590329, now seen corresponding path program 1 times [2019-10-15 03:31:28,914 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:28,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402093243] [2019-10-15 03:31:28,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:28,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:28,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:31:29,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402093243] [2019-10-15 03:31:29,021 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:29,021 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:29,022 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094268200] [2019-10-15 03:31:29,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:29,024 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:29,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:29,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:29,024 INFO L87 Difference]: Start difference. First operand 345 states and 480 transitions. Second operand 3 states. [2019-10-15 03:31:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:29,169 INFO L93 Difference]: Finished difference Result 712 states and 1000 transitions. [2019-10-15 03:31:29,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:29,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2019-10-15 03:31:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:29,172 INFO L225 Difference]: With dead ends: 712 [2019-10-15 03:31:29,173 INFO L226 Difference]: Without dead ends: 375 [2019-10-15 03:31:29,174 INFO L600 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 [2019-10-15 03:31:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2019-10-15 03:31:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 371. [2019-10-15 03:31:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2019-10-15 03:31:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 512 transitions. [2019-10-15 03:31:29,191 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 512 transitions. Word has length 83 [2019-10-15 03:31:29,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:29,192 INFO L462 AbstractCegarLoop]: Abstraction has 371 states and 512 transitions. [2019-10-15 03:31:29,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 512 transitions. [2019-10-15 03:31:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-15 03:31:29,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:29,194 INFO L380 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] [2019-10-15 03:31:29,194 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:29,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:29,195 INFO L82 PathProgramCache]: Analyzing trace with hash -570022483, now seen corresponding path program 1 times [2019-10-15 03:31:29,195 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:29,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275172734] [2019-10-15 03:31:29,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:29,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:29,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:31:29,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275172734] [2019-10-15 03:31:29,241 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:29,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:29,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502074749] [2019-10-15 03:31:29,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:29,242 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:29,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:29,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:29,242 INFO L87 Difference]: Start difference. First operand 371 states and 512 transitions. Second operand 3 states. [2019-10-15 03:31:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:29,355 INFO L93 Difference]: Finished difference Result 748 states and 1034 transitions. [2019-10-15 03:31:29,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:29,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2019-10-15 03:31:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:29,359 INFO L225 Difference]: With dead ends: 748 [2019-10-15 03:31:29,359 INFO L226 Difference]: Without dead ends: 385 [2019-10-15 03:31:29,360 INFO L600 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 [2019-10-15 03:31:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2019-10-15 03:31:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2019-10-15 03:31:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2019-10-15 03:31:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 528 transitions. [2019-10-15 03:31:29,375 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 528 transitions. Word has length 84 [2019-10-15 03:31:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:29,376 INFO L462 AbstractCegarLoop]: Abstraction has 385 states and 528 transitions. [2019-10-15 03:31:29,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 528 transitions. [2019-10-15 03:31:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-15 03:31:29,378 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:29,378 INFO L380 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] [2019-10-15 03:31:29,378 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:29,379 INFO L82 PathProgramCache]: Analyzing trace with hash 439654155, now seen corresponding path program 1 times [2019-10-15 03:31:29,379 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:29,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765101300] [2019-10-15 03:31:29,379 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:29,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:29,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:31:29,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765101300] [2019-10-15 03:31:29,430 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:29,430 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:29,430 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360051167] [2019-10-15 03:31:29,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:29,431 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:29,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:29,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:29,431 INFO L87 Difference]: Start difference. First operand 385 states and 528 transitions. Second operand 3 states. [2019-10-15 03:31:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:29,632 INFO L93 Difference]: Finished difference Result 898 states and 1260 transitions. [2019-10-15 03:31:29,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:29,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2019-10-15 03:31:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:29,636 INFO L225 Difference]: With dead ends: 898 [2019-10-15 03:31:29,636 INFO L226 Difference]: Without dead ends: 515 [2019-10-15 03:31:29,637 INFO L600 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 [2019-10-15 03:31:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2019-10-15 03:31:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 507. [2019-10-15 03:31:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2019-10-15 03:31:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 706 transitions. [2019-10-15 03:31:29,656 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 706 transitions. Word has length 85 [2019-10-15 03:31:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:29,656 INFO L462 AbstractCegarLoop]: Abstraction has 507 states and 706 transitions. [2019-10-15 03:31:29,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 706 transitions. [2019-10-15 03:31:29,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 03:31:29,658 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:29,659 INFO L380 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] [2019-10-15 03:31:29,659 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:29,660 INFO L82 PathProgramCache]: Analyzing trace with hash -592825189, now seen corresponding path program 1 times [2019-10-15 03:31:29,660 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:29,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922037039] [2019-10-15 03:31:29,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:29,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:29,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 03:31:29,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922037039] [2019-10-15 03:31:29,728 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:29,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:29,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943494674] [2019-10-15 03:31:29,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:29,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:29,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:29,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:29,730 INFO L87 Difference]: Start difference. First operand 507 states and 706 transitions. Second operand 3 states. [2019-10-15 03:31:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:29,875 INFO L93 Difference]: Finished difference Result 1072 states and 1514 transitions. [2019-10-15 03:31:29,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:29,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 03:31:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:29,879 INFO L225 Difference]: With dead ends: 1072 [2019-10-15 03:31:29,879 INFO L226 Difference]: Without dead ends: 573 [2019-10-15 03:31:29,881 INFO L600 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 [2019-10-15 03:31:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2019-10-15 03:31:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 553. [2019-10-15 03:31:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2019-10-15 03:31:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 758 transitions. [2019-10-15 03:31:29,900 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 758 transitions. Word has length 94 [2019-10-15 03:31:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:29,900 INFO L462 AbstractCegarLoop]: Abstraction has 553 states and 758 transitions. [2019-10-15 03:31:29,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 758 transitions. [2019-10-15 03:31:29,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 03:31:29,903 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:29,903 INFO L380 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] [2019-10-15 03:31:29,903 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:29,904 INFO L82 PathProgramCache]: Analyzing trace with hash -243572066, now seen corresponding path program 1 times [2019-10-15 03:31:29,904 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:29,904 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649033801] [2019-10-15 03:31:29,904 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:29,905 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:29,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 03:31:29,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649033801] [2019-10-15 03:31:29,955 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:29,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:29,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694748518] [2019-10-15 03:31:29,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:29,956 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:29,957 INFO L87 Difference]: Start difference. First operand 553 states and 758 transitions. Second operand 3 states. [2019-10-15 03:31:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:30,107 INFO L93 Difference]: Finished difference Result 1164 states and 1620 transitions. [2019-10-15 03:31:30,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:30,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-10-15 03:31:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:30,111 INFO L225 Difference]: With dead ends: 1164 [2019-10-15 03:31:30,112 INFO L226 Difference]: Without dead ends: 619 [2019-10-15 03:31:30,113 INFO L600 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 [2019-10-15 03:31:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-10-15 03:31:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 603. [2019-10-15 03:31:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-15 03:31:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 814 transitions. [2019-10-15 03:31:30,150 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 814 transitions. Word has length 118 [2019-10-15 03:31:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:30,151 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 814 transitions. [2019-10-15 03:31:30,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 814 transitions. [2019-10-15 03:31:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 03:31:30,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:30,154 INFO L380 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] [2019-10-15 03:31:30,154 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:30,155 INFO L82 PathProgramCache]: Analyzing trace with hash -207406381, now seen corresponding path program 1 times [2019-10-15 03:31:30,155 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:30,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925355101] [2019-10-15 03:31:30,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:30,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:30,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 03:31:30,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925355101] [2019-10-15 03:31:30,206 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:30,206 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:30,207 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571630839] [2019-10-15 03:31:30,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:30,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:30,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:30,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:30,208 INFO L87 Difference]: Start difference. First operand 603 states and 814 transitions. Second operand 3 states. [2019-10-15 03:31:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:30,443 INFO L93 Difference]: Finished difference Result 1212 states and 1640 transitions. [2019-10-15 03:31:30,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:30,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-10-15 03:31:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:30,450 INFO L225 Difference]: With dead ends: 1212 [2019-10-15 03:31:30,451 INFO L226 Difference]: Without dead ends: 615 [2019-10-15 03:31:30,453 INFO L600 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 [2019-10-15 03:31:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-10-15 03:31:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 609. [2019-10-15 03:31:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2019-10-15 03:31:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 818 transitions. [2019-10-15 03:31:30,480 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 818 transitions. Word has length 123 [2019-10-15 03:31:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:30,481 INFO L462 AbstractCegarLoop]: Abstraction has 609 states and 818 transitions. [2019-10-15 03:31:30,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:30,482 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 818 transitions. [2019-10-15 03:31:30,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 03:31:30,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:30,486 INFO L380 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] [2019-10-15 03:31:30,487 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:30,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1845277655, now seen corresponding path program 1 times [2019-10-15 03:31:30,488 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:30,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335772800] [2019-10-15 03:31:30,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:30,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:30,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-15 03:31:30,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335772800] [2019-10-15 03:31:30,590 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:30,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:30,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389235636] [2019-10-15 03:31:30,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:30,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:30,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:30,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:30,592 INFO L87 Difference]: Start difference. First operand 609 states and 818 transitions. Second operand 3 states. [2019-10-15 03:31:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:30,748 INFO L93 Difference]: Finished difference Result 1268 states and 1726 transitions. [2019-10-15 03:31:30,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:30,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-10-15 03:31:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:30,753 INFO L225 Difference]: With dead ends: 1268 [2019-10-15 03:31:30,753 INFO L226 Difference]: Without dead ends: 667 [2019-10-15 03:31:30,760 INFO L600 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 [2019-10-15 03:31:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2019-10-15 03:31:30,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 663. [2019-10-15 03:31:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-10-15 03:31:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 878 transitions. [2019-10-15 03:31:30,785 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 878 transitions. Word has length 140 [2019-10-15 03:31:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:30,785 INFO L462 AbstractCegarLoop]: Abstraction has 663 states and 878 transitions. [2019-10-15 03:31:30,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 878 transitions. [2019-10-15 03:31:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 03:31:30,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:30,788 INFO L380 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] [2019-10-15 03:31:30,789 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash 773889394, now seen corresponding path program 1 times [2019-10-15 03:31:30,789 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:30,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674423398] [2019-10-15 03:31:30,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:30,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:30,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-15 03:31:30,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674423398] [2019-10-15 03:31:30,890 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:30,890 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:30,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882218465] [2019-10-15 03:31:30,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:30,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:30,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:30,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:30,892 INFO L87 Difference]: Start difference. First operand 663 states and 878 transitions. Second operand 3 states. [2019-10-15 03:31:31,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:31,046 INFO L93 Difference]: Finished difference Result 1376 states and 1850 transitions. [2019-10-15 03:31:31,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:31,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2019-10-15 03:31:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:31,051 INFO L225 Difference]: With dead ends: 1376 [2019-10-15 03:31:31,051 INFO L226 Difference]: Without dead ends: 721 [2019-10-15 03:31:31,053 INFO L600 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 [2019-10-15 03:31:31,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-15 03:31:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2019-10-15 03:31:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2019-10-15 03:31:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 942 transitions. [2019-10-15 03:31:31,076 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 942 transitions. Word has length 145 [2019-10-15 03:31:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:31,076 INFO L462 AbstractCegarLoop]: Abstraction has 721 states and 942 transitions. [2019-10-15 03:31:31,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 942 transitions. [2019-10-15 03:31:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-15 03:31:31,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:31,080 INFO L380 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] [2019-10-15 03:31:31,080 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash -94312404, now seen corresponding path program 1 times [2019-10-15 03:31:31,081 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:31,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583020479] [2019-10-15 03:31:31,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:31,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:31,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-15 03:31:31,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583020479] [2019-10-15 03:31:31,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362907741] [2019-10-15 03:31:31,156 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 [2019-10-15 03:31:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:31,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:31:31,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-15 03:31:31,367 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:31,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:31,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-10-15 03:31:31,473 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:31:31,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 5] total 8 [2019-10-15 03:31:31,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614736235] [2019-10-15 03:31:31,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:31,475 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:31:31,475 INFO L87 Difference]: Start difference. First operand 721 states and 942 transitions. Second operand 3 states. [2019-10-15 03:31:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:31,535 INFO L93 Difference]: Finished difference Result 1432 states and 1874 transitions. [2019-10-15 03:31:31,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:31,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2019-10-15 03:31:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:31,542 INFO L225 Difference]: With dead ends: 1432 [2019-10-15 03:31:31,542 INFO L226 Difference]: Without dead ends: 1430 [2019-10-15 03:31:31,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:31:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2019-10-15 03:31:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1298. [2019-10-15 03:31:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1298 states. [2019-10-15 03:31:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1724 transitions. [2019-10-15 03:31:31,590 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1724 transitions. Word has length 172 [2019-10-15 03:31:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:31,591 INFO L462 AbstractCegarLoop]: Abstraction has 1298 states and 1724 transitions. [2019-10-15 03:31:31,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1724 transitions. [2019-10-15 03:31:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-15 03:31:31,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:31,596 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:31,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:31,808 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1014379358, now seen corresponding path program 1 times [2019-10-15 03:31:31,809 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:31,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594975019] [2019-10-15 03:31:31,809 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:31,809 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:31,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:31:31,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594975019] [2019-10-15 03:31:31,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120106593] [2019-10-15 03:31:31,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:32,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:31:32,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:31:32,192 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:32,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:32,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:32,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:32,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:32,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:32,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:32,286 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:32,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:31:32,407 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:31:32,407 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 11 [2019-10-15 03:31:32,407 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921132025] [2019-10-15 03:31:32,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:31:32,408 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:32,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:31:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:31:32,409 INFO L87 Difference]: Start difference. First operand 1298 states and 1724 transitions. Second operand 7 states. [2019-10-15 03:31:32,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:32,580 INFO L93 Difference]: Finished difference Result 3040 states and 4021 transitions. [2019-10-15 03:31:32,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:31:32,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 177 [2019-10-15 03:31:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:32,592 INFO L225 Difference]: With dead ends: 3040 [2019-10-15 03:31:32,593 INFO L226 Difference]: Without dead ends: 2373 [2019-10-15 03:31:32,595 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 350 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:31:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2019-10-15 03:31:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1688. [2019-10-15 03:31:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2019-10-15 03:31:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2232 transitions. [2019-10-15 03:31:32,676 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2232 transitions. Word has length 177 [2019-10-15 03:31:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:32,677 INFO L462 AbstractCegarLoop]: Abstraction has 1688 states and 2232 transitions. [2019-10-15 03:31:32,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:31:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2232 transitions. [2019-10-15 03:31:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2019-10-15 03:31:32,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:32,692 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:32,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:32,905 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1943840334, now seen corresponding path program 1 times [2019-10-15 03:31:32,906 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:32,906 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009042506] [2019-10-15 03:31:32,906 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:32,906 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:32,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 710 proven. 25 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2019-10-15 03:31:33,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009042506] [2019-10-15 03:31:33,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779778523] [2019-10-15 03:31:33,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:33,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:31:33,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 548 proven. 135 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 03:31:33,312 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:33,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:33,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 548 proven. 0 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2019-10-15 03:31:33,459 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:31:33,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 5] total 8 [2019-10-15 03:31:33,460 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397972323] [2019-10-15 03:31:33,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:33,461 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:33,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:31:33,462 INFO L87 Difference]: Start difference. First operand 1688 states and 2232 transitions. Second operand 3 states. [2019-10-15 03:31:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:33,548 INFO L93 Difference]: Finished difference Result 3065 states and 4047 transitions. [2019-10-15 03:31:33,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:33,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 299 [2019-10-15 03:31:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:33,560 INFO L225 Difference]: With dead ends: 3065 [2019-10-15 03:31:33,560 INFO L226 Difference]: Without dead ends: 2398 [2019-10-15 03:31:33,563 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 593 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:31:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2019-10-15 03:31:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 2265. [2019-10-15 03:31:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2265 states. [2019-10-15 03:31:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 3012 transitions. [2019-10-15 03:31:33,645 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 3012 transitions. Word has length 299 [2019-10-15 03:31:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:33,646 INFO L462 AbstractCegarLoop]: Abstraction has 2265 states and 3012 transitions. [2019-10-15 03:31:33,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 3012 transitions. [2019-10-15 03:31:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-10-15 03:31:33,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:33,655 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 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] [2019-10-15 03:31:33,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:33,860 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash 185073728, now seen corresponding path program 1 times [2019-10-15 03:31:33,861 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:33,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99383896] [2019-10-15 03:31:33,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:33,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:33,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 553 proven. 316 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-10-15 03:31:34,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99383896] [2019-10-15 03:31:34,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240266680] [2019-10-15 03:31:34,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:34,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:31:34,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:34,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:34,286 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 631 proven. 151 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-15 03:31:34,479 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:34,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:31:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 998 backedges. 682 proven. 100 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-15 03:31:34,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264219832] [2019-10-15 03:31:34,800 INFO L162 IcfgInterpreter]: Started Sifa with 63 locations of interest [2019-10-15 03:31:34,800 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:31:34,807 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:31:34,817 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:31:34,817 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:31:34,879 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:31:34,890 INFO L199 IcfgInterpreter]: Interpreting procedure ssl3_accept with input of size 3 for LOIs [2019-10-15 03:31:35,959 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2019-10-15 03:31:36,276 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 196 [2019-10-15 03:31:57,722 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:31:57,723 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:31:59,117 WARN L191 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 265 DAG size of output: 151 [2019-10-15 03:31:59,916 WARN L191 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 148 [2019-10-15 03:32:00,624 WARN L191 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 144 [2019-10-15 03:32:01,317 WARN L191 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 143 [2019-10-15 03:32:02,039 WARN L191 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 147