/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/product-lines/email_spec9_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:15:54,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:15:54,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:15:54,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:15:54,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:15:54,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:15:54,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:15:54,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:15:54,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:15:54,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:15:54,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:15:54,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:15:54,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:15:54,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:15:54,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:15:54,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:15:54,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:15:54,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:15:54,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:15:54,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:15:54,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:15:54,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:15:54,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:15:54,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:15:54,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:15:54,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:15:54,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:15:54,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:15:54,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:15:54,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:15:54,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:15:54,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:15:54,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:15:54,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:15:54,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:15:54,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:15:54,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 05:15:54,115 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:15:54,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:15:54,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:15:54,116 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:15:54,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:15:54,117 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:15:54,117 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:15:54,118 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:15:54,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:15:54,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:15:54,118 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:15:54,118 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:15:54,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:15:54,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:15:54,119 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:15:54,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:15:54,121 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:15:54,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:15:54,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:15:54,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:15:54,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:15:54,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:15:54,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:15:54,123 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:15:54,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:15:54,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:15:54,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:15:54,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:15:54,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:15:54,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:15:54,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:15:54,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:15:54,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:15:54,126 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:15:54,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:15:54,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:15:54,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:15:54,127 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:15:54,475 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:15:54,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:15:54,499 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:15:54,500 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:15:54,501 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:15:54,502 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec9_product31.cil.c [2019-11-24 05:15:54,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98c78fcc5/886977a77297421b910129ca5dd8fea7/FLAGe7dcefc27 [2019-11-24 05:15:55,173 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:15:55,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec9_product31.cil.c [2019-11-24 05:15:55,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98c78fcc5/886977a77297421b910129ca5dd8fea7/FLAGe7dcefc27 [2019-11-24 05:15:55,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98c78fcc5/886977a77297421b910129ca5dd8fea7 [2019-11-24 05:15:55,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:15:55,446 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:15:55,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:15:55,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:15:55,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:15:55,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:55,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31856daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:55, skipping insertion in model container [2019-11-24 05:15:55,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:15:55" (1/1) ... [2019-11-24 05:15:55,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:15:55,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:15:56,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:15:56,345 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:15:56,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:15:56,596 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:15:56,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56 WrapperNode [2019-11-24 05:15:56,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:15:56,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:15:56,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:15:56,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:15:56,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:15:56,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:15:56,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:15:56,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:15:56,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (1/1) ... [2019-11-24 05:15:56,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:15:56,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:15:56,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:15:56,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:15:56,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:15:56,993 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:15:56,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:15:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:15:56,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:15:56,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:16:06,282 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:16:06,282 INFO L284 CfgBuilder]: Removed 379 assume(true) statements. [2019-11-24 05:16:06,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:16:06 BoogieIcfgContainer [2019-11-24 05:16:06,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:16:06,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:16:06,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:16:06,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:16:06,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:15:55" (1/3) ... [2019-11-24 05:16:06,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@778dc016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:16:06, skipping insertion in model container [2019-11-24 05:16:06,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:15:56" (2/3) ... [2019-11-24 05:16:06,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@778dc016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:16:06, skipping insertion in model container [2019-11-24 05:16:06,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:16:06" (3/3) ... [2019-11-24 05:16:06,302 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec9_product31.cil.c [2019-11-24 05:16:06,312 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:16:06,319 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:16:06,328 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:16:06,348 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:16:06,348 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:16:06,348 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:16:06,348 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:16:06,348 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:16:06,348 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:16:06,348 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:16:06,348 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:16:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:16:06,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:16:06,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:06,370 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:06,370 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:06,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:06,376 INFO L82 PathProgramCache]: Analyzing trace with hash -371057454, now seen corresponding path program 1 times [2019-11-24 05:16:06,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:06,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279683218] [2019-11-24 05:16:06,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:06,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279683218] [2019-11-24 05:16:06,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:06,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:16:06,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644808694] [2019-11-24 05:16:06,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:16:06,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:06,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:16:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:16:06,798 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:16:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:06,821 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:16:06,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:16:06,823 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:16:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:06,834 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:16:06,834 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:16:06,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:16:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:16:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:16:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:16:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:16:06,879 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:16:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:06,880 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:16:06,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:16:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:16:06,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:16:06,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:06,881 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:06,882 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:06,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:06,882 INFO L82 PathProgramCache]: Analyzing trace with hash 992023538, now seen corresponding path program 1 times [2019-11-24 05:16:06,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:06,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803943379] [2019-11-24 05:16:06,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:06,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803943379] [2019-11-24 05:16:06,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:06,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:06,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289216725] [2019-11-24 05:16:06,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:06,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:06,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:06,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:06,998 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:16:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:07,029 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:16:07,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:07,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:16:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:07,033 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:16:07,034 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:16:07,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:16:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:16:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:16:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:16:07,051 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:16:07,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:07,051 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:16:07,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:16:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:16:07,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:07,054 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:07,055 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:07,056 INFO L82 PathProgramCache]: Analyzing trace with hash -434261235, now seen corresponding path program 1 times [2019-11-24 05:16:07,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:07,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184681188] [2019-11-24 05:16:07,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:16:07,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184681188] [2019-11-24 05:16:07,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:07,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:16:07,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818852960] [2019-11-24 05:16:07,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:07,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:07,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:07,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:07,250 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 05:16:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:07,293 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 05:16:07,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:07,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 05:16:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:07,295 INFO L225 Difference]: With dead ends: 45 [2019-11-24 05:16:07,295 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 05:16:07,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 05:16:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 05:16:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 05:16:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 05:16:07,304 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 05:16:07,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:07,304 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 05:16:07,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:07,304 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 05:16:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:16:07,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:07,305 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:07,308 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:07,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:07,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2132568854, now seen corresponding path program 1 times [2019-11-24 05:16:07,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:07,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019953904] [2019-11-24 05:16:07,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:16:07,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019953904] [2019-11-24 05:16:07,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:07,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:16:07,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660031197] [2019-11-24 05:16:07,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:16:07,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:16:07,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:16:07,711 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states. [2019-11-24 05:16:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:08,152 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 05:16:08,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:16:08,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:16:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:08,154 INFO L225 Difference]: With dead ends: 68 [2019-11-24 05:16:08,154 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 05:16:08,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 05:16:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 05:16:08,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 05:16:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 05:16:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 05:16:08,165 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 05:16:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:08,165 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 05:16:08,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:16:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 05:16:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 05:16:08,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:08,167 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:08,167 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:08,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:08,167 INFO L82 PathProgramCache]: Analyzing trace with hash -543167429, now seen corresponding path program 1 times [2019-11-24 05:16:08,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:08,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391737495] [2019-11-24 05:16:08,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:08,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391737495] [2019-11-24 05:16:08,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:08,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:08,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814947854] [2019-11-24 05:16:08,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:08,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:08,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:08,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:08,260 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 05:16:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:08,288 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 05:16:08,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:08,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-24 05:16:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:08,290 INFO L225 Difference]: With dead ends: 168 [2019-11-24 05:16:08,290 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 05:16:08,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 05:16:08,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 05:16:08,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 05:16:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 05:16:08,306 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 20 [2019-11-24 05:16:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:08,306 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 05:16:08,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 05:16:08,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 05:16:08,308 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:08,308 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:08,308 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash 865154154, now seen corresponding path program 1 times [2019-11-24 05:16:08,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:08,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45697029] [2019-11-24 05:16:08,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:08,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45697029] [2019-11-24 05:16:08,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:08,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:08,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350240111] [2019-11-24 05:16:08,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:08,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:08,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:08,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:08,373 INFO L87 Difference]: Start difference. First operand 104 states and 185 transitions. Second operand 3 states. [2019-11-24 05:16:08,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:08,395 INFO L93 Difference]: Finished difference Result 304 states and 543 transitions. [2019-11-24 05:16:08,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:08,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-24 05:16:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:08,398 INFO L225 Difference]: With dead ends: 304 [2019-11-24 05:16:08,398 INFO L226 Difference]: Without dead ends: 202 [2019-11-24 05:16:08,399 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-24 05:16:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2019-11-24 05:16:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-24 05:16:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 349 transitions. [2019-11-24 05:16:08,426 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 349 transitions. Word has length 21 [2019-11-24 05:16:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:08,427 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 349 transitions. [2019-11-24 05:16:08,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:08,427 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 349 transitions. [2019-11-24 05:16:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-24 05:16:08,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:08,431 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:08,432 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:08,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:08,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1614621335, now seen corresponding path program 1 times [2019-11-24 05:16:08,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:08,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416435685] [2019-11-24 05:16:08,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:08,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416435685] [2019-11-24 05:16:08,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:08,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:08,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329068117] [2019-11-24 05:16:08,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:08,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:08,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:08,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:08,516 INFO L87 Difference]: Start difference. First operand 194 states and 349 transitions. Second operand 3 states. [2019-11-24 05:16:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:08,545 INFO L93 Difference]: Finished difference Result 570 states and 1027 transitions. [2019-11-24 05:16:08,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:08,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-11-24 05:16:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:08,548 INFO L225 Difference]: With dead ends: 570 [2019-11-24 05:16:08,548 INFO L226 Difference]: Without dead ends: 378 [2019-11-24 05:16:08,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:08,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2019-11-24 05:16:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 370. [2019-11-24 05:16:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2019-11-24 05:16:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 665 transitions. [2019-11-24 05:16:08,591 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 665 transitions. Word has length 22 [2019-11-24 05:16:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:08,592 INFO L462 AbstractCegarLoop]: Abstraction has 370 states and 665 transitions. [2019-11-24 05:16:08,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 665 transitions. [2019-11-24 05:16:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-24 05:16:08,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:08,601 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:08,602 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:08,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1782919636, now seen corresponding path program 1 times [2019-11-24 05:16:08,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:08,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146925306] [2019-11-24 05:16:08,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:08,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146925306] [2019-11-24 05:16:08,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:08,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:08,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083959385] [2019-11-24 05:16:08,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:08,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:08,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:08,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:08,689 INFO L87 Difference]: Start difference. First operand 370 states and 665 transitions. Second operand 3 states. [2019-11-24 05:16:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:08,740 INFO L93 Difference]: Finished difference Result 1090 states and 1959 transitions. [2019-11-24 05:16:08,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:08,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-24 05:16:08,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:08,745 INFO L225 Difference]: With dead ends: 1090 [2019-11-24 05:16:08,745 INFO L226 Difference]: Without dead ends: 722 [2019-11-24 05:16:08,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:08,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2019-11-24 05:16:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 714. [2019-11-24 05:16:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2019-11-24 05:16:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1273 transitions. [2019-11-24 05:16:08,795 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1273 transitions. Word has length 23 [2019-11-24 05:16:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:08,796 INFO L462 AbstractCegarLoop]: Abstraction has 714 states and 1273 transitions. [2019-11-24 05:16:08,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1273 transitions. [2019-11-24 05:16:08,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 05:16:08,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:08,797 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:08,798 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:08,798 INFO L82 PathProgramCache]: Analyzing trace with hash 980259450, now seen corresponding path program 1 times [2019-11-24 05:16:08,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:08,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709804188] [2019-11-24 05:16:08,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:08,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709804188] [2019-11-24 05:16:08,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:08,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:16:08,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839037080] [2019-11-24 05:16:08,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:16:08,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:08,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:16:08,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:08,874 INFO L87 Difference]: Start difference. First operand 714 states and 1273 transitions. Second operand 3 states. [2019-11-24 05:16:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:09,060 INFO L93 Difference]: Finished difference Result 2106 states and 3751 transitions. [2019-11-24 05:16:09,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:16:09,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-24 05:16:09,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:09,070 INFO L225 Difference]: With dead ends: 2106 [2019-11-24 05:16:09,070 INFO L226 Difference]: Without dead ends: 1394 [2019-11-24 05:16:09,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:16:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2019-11-24 05:16:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1386. [2019-11-24 05:16:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1386 states. [2019-11-24 05:16:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2441 transitions. [2019-11-24 05:16:09,166 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2441 transitions. Word has length 24 [2019-11-24 05:16:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:09,166 INFO L462 AbstractCegarLoop]: Abstraction has 1386 states and 2441 transitions. [2019-11-24 05:16:09,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:16:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2441 transitions. [2019-11-24 05:16:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-24 05:16:09,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:09,168 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:09,168 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1742662307, now seen corresponding path program 1 times [2019-11-24 05:16:09,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:09,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475775184] [2019-11-24 05:16:09,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 05:16:09,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475775184] [2019-11-24 05:16:09,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:16:09,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:16:09,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032975096] [2019-11-24 05:16:09,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:16:09,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:16:09,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:16:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:16:09,488 INFO L87 Difference]: Start difference. First operand 1386 states and 2441 transitions. Second operand 6 states. [2019-11-24 05:16:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:16:10,015 INFO L93 Difference]: Finished difference Result 1578 states and 2764 transitions. [2019-11-24 05:16:10,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:16:10,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-24 05:16:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:16:10,026 INFO L225 Difference]: With dead ends: 1578 [2019-11-24 05:16:10,026 INFO L226 Difference]: Without dead ends: 1570 [2019-11-24 05:16:10,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-24 05:16:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2019-11-24 05:16:10,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1562. [2019-11-24 05:16:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1562 states. [2019-11-24 05:16:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2737 transitions. [2019-11-24 05:16:10,166 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2737 transitions. Word has length 25 [2019-11-24 05:16:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:16:10,166 INFO L462 AbstractCegarLoop]: Abstraction has 1562 states and 2737 transitions. [2019-11-24 05:16:10,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:16:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2737 transitions. [2019-11-24 05:16:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-24 05:16:10,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:16:10,169 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:16:10,169 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:16:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:16:10,169 INFO L82 PathProgramCache]: Analyzing trace with hash -515471927, now seen corresponding path program 1 times [2019-11-24 05:16:10,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:16:10,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449195037] [2019-11-24 05:16:10,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:16:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:10,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449195037] [2019-11-24 05:16:10,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039819416] [2019-11-24 05:16:10,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:16:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:16:10,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 05:16:10,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:16:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:10,979 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:16:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:16:11,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696245862] [2019-11-24 05:16:11,046 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2019-11-24 05:16:11,046 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:16:11,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:16:11,059 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:16:11,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:17:24,892 WARN L192 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 722 [2019-11-24 05:17:29,518 WARN L192 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 343 DAG size of output: 279 [2019-11-24 05:17:29,958 WARN L192 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 767 [2019-11-24 05:17:30,256 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8