/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_spec0_product16.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:49:00,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:49:00,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:49:00,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:49:00,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:49:00,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:49:00,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:49:00,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:49:00,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:49:00,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:49:00,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:49:00,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:49:00,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:49:00,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:49:00,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:49:00,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:49:00,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:49:00,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:49:00,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:49:00,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:49:00,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:49:00,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:49:00,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:49:00,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:49:00,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 04:49:00,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 04:49:00,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 04:49:00,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 04:49:00,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 04:49:00,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 04:49:00,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:49:00,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:49:00,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:49:00,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:49:00,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:49:00,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:49:00,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:49:00,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:49:00,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:49:00,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:49:00,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:49:00,983 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 04:49:01,009 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:49:01,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:49:01,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:49:01,011 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:49:01,011 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:49:01,011 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:49:01,011 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:49:01,012 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:49:01,012 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:49:01,012 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:49:01,013 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:49:01,013 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:49:01,014 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:49:01,014 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:49:01,014 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:49:01,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:49:01,016 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:49:01,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:49:01,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:49:01,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:49:01,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:49:01,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:49:01,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:49:01,017 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:49:01,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:49:01,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:49:01,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:49:01,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:49:01,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:49:01,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:49:01,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:49:01,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:49:01,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:49:01,021 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:49:01,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:49:01,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:49:01,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:49:01,022 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:49:01,335 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:49:01,351 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:49:01,355 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:49:01,357 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:49:01,357 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:49:01,358 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec0_product16.cil.c [2019-11-24 04:49:01,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/145984dba/6c1bd47e97e4439084303a83202b34b8/FLAGb678287b9 [2019-11-24 04:49:02,070 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:49:02,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec0_product16.cil.c [2019-11-24 04:49:02,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/145984dba/6c1bd47e97e4439084303a83202b34b8/FLAGb678287b9 [2019-11-24 04:49:02,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/145984dba/6c1bd47e97e4439084303a83202b34b8 [2019-11-24 04:49:02,263 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:49:02,265 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:49:02,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:49:02,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:49:02,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:49:02,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:49:02" (1/1) ... [2019-11-24 04:49:02,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa637bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:02, skipping insertion in model container [2019-11-24 04:49:02,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:49:02" (1/1) ... [2019-11-24 04:49:02,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:49:02,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:49:03,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:49:03,126 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:49:03,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:49:03,373 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:49:03,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03 WrapperNode [2019-11-24 04:49:03,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:49:03,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:49:03,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:49:03,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:49:03,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (1/1) ... [2019-11-24 04:49:03,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (1/1) ... [2019-11-24 04:49:03,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:49:03,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:49:03,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:49:03,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:49:03,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (1/1) ... [2019-11-24 04:49:03,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (1/1) ... [2019-11-24 04:49:03,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (1/1) ... [2019-11-24 04:49:03,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (1/1) ... [2019-11-24 04:49:03,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (1/1) ... [2019-11-24 04:49:03,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (1/1) ... [2019-11-24 04:49:03,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (1/1) ... [2019-11-24 04:49:03,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:49:03,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:49:03,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:49:03,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:49:03,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (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 04:49:03,699 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 04:49:03,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:49:03,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:49:03,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:49:03,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:49:10,371 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:49:10,371 INFO L284 CfgBuilder]: Removed 295 assume(true) statements. [2019-11-24 04:49:10,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:49:10 BoogieIcfgContainer [2019-11-24 04:49:10,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:49:10,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:49:10,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:49:10,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:49:10,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:49:02" (1/3) ... [2019-11-24 04:49:10,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e1dbc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:49:10, skipping insertion in model container [2019-11-24 04:49:10,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:49:03" (2/3) ... [2019-11-24 04:49:10,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e1dbc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:49:10, skipping insertion in model container [2019-11-24 04:49:10,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:49:10" (3/3) ... [2019-11-24 04:49:10,382 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec0_product16.cil.c [2019-11-24 04:49:10,393 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:49:10,402 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:49:10,414 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:49:10,440 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:49:10,440 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:49:10,441 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:49:10,441 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:49:10,441 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:49:10,441 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:49:10,441 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:49:10,442 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:49:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-11-24 04:49:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:49:10,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:10,465 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:10,466 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:10,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1118695119, now seen corresponding path program 1 times [2019-11-24 04:49:10,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:10,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117107640] [2019-11-24 04:49:10,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:10,963 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 04:49:10,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117107640] [2019-11-24 04:49:10,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:10,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:49:10,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483343094] [2019-11-24 04:49:10,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:49:10,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:10,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:49:10,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:49:10,988 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2019-11-24 04:49:11,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:11,011 INFO L93 Difference]: Finished difference Result 56 states and 89 transitions. [2019-11-24 04:49:11,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:49:11,012 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 04:49:11,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:11,024 INFO L225 Difference]: With dead ends: 56 [2019-11-24 04:49:11,024 INFO L226 Difference]: Without dead ends: 38 [2019-11-24 04:49:11,028 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 04:49:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-24 04:49:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-24 04:49:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-24 04:49:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 61 transitions. [2019-11-24 04:49:11,070 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 61 transitions. Word has length 7 [2019-11-24 04:49:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:11,070 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 61 transitions. [2019-11-24 04:49:11,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:49:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 61 transitions. [2019-11-24 04:49:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:49:11,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:11,071 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:11,072 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:11,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1232370342, now seen corresponding path program 1 times [2019-11-24 04:49:11,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:11,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42292271] [2019-11-24 04:49:11,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:11,254 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 04:49:11,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42292271] [2019-11-24 04:49:11,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:11,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:11,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009760633] [2019-11-24 04:49:11,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:11,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:11,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:11,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:11,258 INFO L87 Difference]: Start difference. First operand 38 states and 61 transitions. Second operand 3 states. [2019-11-24 04:49:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:11,275 INFO L93 Difference]: Finished difference Result 52 states and 76 transitions. [2019-11-24 04:49:11,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:49:11,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:49:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:11,277 INFO L225 Difference]: With dead ends: 52 [2019-11-24 04:49:11,277 INFO L226 Difference]: Without dead ends: 40 [2019-11-24 04:49:11,278 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 04:49:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-24 04:49:11,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-24 04:49:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-24 04:49:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 63 transitions. [2019-11-24 04:49:11,287 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 63 transitions. Word has length 8 [2019-11-24 04:49:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:11,287 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 63 transitions. [2019-11-24 04:49:11,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:49:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 63 transitions. [2019-11-24 04:49:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:49:11,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:11,288 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:11,289 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:11,289 INFO L82 PathProgramCache]: Analyzing trace with hash -937082127, now seen corresponding path program 1 times [2019-11-24 04:49:11,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:11,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898787902] [2019-11-24 04:49:11,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:11,620 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 04:49:11,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898787902] [2019-11-24 04:49:11,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:11,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:11,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600165685] [2019-11-24 04:49:11,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:49:11,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:11,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:49:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:49:11,625 INFO L87 Difference]: Start difference. First operand 40 states and 63 transitions. Second operand 4 states. [2019-11-24 04:49:11,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:11,734 INFO L93 Difference]: Finished difference Result 81 states and 127 transitions. [2019-11-24 04:49:11,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:49:11,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-24 04:49:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:11,740 INFO L225 Difference]: With dead ends: 81 [2019-11-24 04:49:11,740 INFO L226 Difference]: Without dead ends: 66 [2019-11-24 04:49:11,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:49:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-24 04:49:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2019-11-24 04:49:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-24 04:49:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 105 transitions. [2019-11-24 04:49:11,751 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 105 transitions. Word has length 12 [2019-11-24 04:49:11,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:11,752 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 105 transitions. [2019-11-24 04:49:11,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:49:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 105 transitions. [2019-11-24 04:49:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:49:11,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:11,753 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:11,753 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:11,754 INFO L82 PathProgramCache]: Analyzing trace with hash -930484558, now seen corresponding path program 1 times [2019-11-24 04:49:11,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:11,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853348480] [2019-11-24 04:49:11,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:11,815 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 04:49:11,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853348480] [2019-11-24 04:49:11,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:11,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:11,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16217822] [2019-11-24 04:49:11,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:11,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:11,817 INFO L87 Difference]: Start difference. First operand 62 states and 105 transitions. Second operand 3 states. [2019-11-24 04:49:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:11,844 INFO L93 Difference]: Finished difference Result 180 states and 307 transitions. [2019-11-24 04:49:11,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:49:11,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-24 04:49:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:11,847 INFO L225 Difference]: With dead ends: 180 [2019-11-24 04:49:11,847 INFO L226 Difference]: Without dead ends: 120 [2019-11-24 04:49:11,848 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 04:49:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-24 04:49:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2019-11-24 04:49:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-24 04:49:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 190 transitions. [2019-11-24 04:49:11,864 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 190 transitions. Word has length 17 [2019-11-24 04:49:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:11,865 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 190 transitions. [2019-11-24 04:49:11,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:49:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 190 transitions. [2019-11-24 04:49:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 04:49:11,866 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:11,866 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:11,867 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:11,867 INFO L82 PathProgramCache]: Analyzing trace with hash 984234173, now seen corresponding path program 1 times [2019-11-24 04:49:11,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:11,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447394766] [2019-11-24 04:49:11,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:11,926 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 04:49:11,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447394766] [2019-11-24 04:49:11,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:11,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:11,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818906755] [2019-11-24 04:49:11,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:11,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:11,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:11,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:11,929 INFO L87 Difference]: Start difference. First operand 108 states and 190 transitions. Second operand 3 states. [2019-11-24 04:49:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:11,950 INFO L93 Difference]: Finished difference Result 316 states and 558 transitions. [2019-11-24 04:49:11,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:49:11,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-24 04:49:11,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:11,953 INFO L225 Difference]: With dead ends: 316 [2019-11-24 04:49:11,953 INFO L226 Difference]: Without dead ends: 210 [2019-11-24 04:49:11,955 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 04:49:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-24 04:49:11,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 198. [2019-11-24 04:49:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-11-24 04:49:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 354 transitions. [2019-11-24 04:49:11,979 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 354 transitions. Word has length 18 [2019-11-24 04:49:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:11,980 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 354 transitions. [2019-11-24 04:49:11,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:49:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 354 transitions. [2019-11-24 04:49:11,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 04:49:11,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:11,982 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:49:11,982 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:11,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1240383364, now seen corresponding path program 1 times [2019-11-24 04:49:11,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:11,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626174350] [2019-11-24 04:49:11,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:12,039 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 04:49:12,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626174350] [2019-11-24 04:49:12,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:12,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:12,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910969129] [2019-11-24 04:49:12,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:12,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:12,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:12,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:12,041 INFO L87 Difference]: Start difference. First operand 198 states and 354 transitions. Second operand 3 states. [2019-11-24 04:49:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:12,069 INFO L93 Difference]: Finished difference Result 582 states and 1042 transitions. [2019-11-24 04:49:12,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:49:12,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 04:49:12,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:12,073 INFO L225 Difference]: With dead ends: 582 [2019-11-24 04:49:12,073 INFO L226 Difference]: Without dead ends: 386 [2019-11-24 04:49:12,075 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 04:49:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2019-11-24 04:49:12,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 374. [2019-11-24 04:49:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2019-11-24 04:49:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 670 transitions. [2019-11-24 04:49:12,111 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 670 transitions. Word has length 19 [2019-11-24 04:49:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:12,111 INFO L462 AbstractCegarLoop]: Abstraction has 374 states and 670 transitions. [2019-11-24 04:49:12,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:49:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 670 transitions. [2019-11-24 04:49:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 04:49:12,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:12,114 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 04:49:12,114 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:12,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:12,114 INFO L82 PathProgramCache]: Analyzing trace with hash 243315451, now seen corresponding path program 1 times [2019-11-24 04:49:12,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:12,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006192364] [2019-11-24 04:49:12,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:12,190 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 04:49:12,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006192364] [2019-11-24 04:49:12,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:12,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:12,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958138050] [2019-11-24 04:49:12,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:12,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:12,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:12,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:12,194 INFO L87 Difference]: Start difference. First operand 374 states and 670 transitions. Second operand 3 states. [2019-11-24 04:49:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:12,248 INFO L93 Difference]: Finished difference Result 1102 states and 1974 transitions. [2019-11-24 04:49:12,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:49:12,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-24 04:49:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:12,254 INFO L225 Difference]: With dead ends: 1102 [2019-11-24 04:49:12,254 INFO L226 Difference]: Without dead ends: 730 [2019-11-24 04:49:12,257 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 04:49:12,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2019-11-24 04:49:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 718. [2019-11-24 04:49:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-11-24 04:49:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1278 transitions. [2019-11-24 04:49:12,323 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1278 transitions. Word has length 20 [2019-11-24 04:49:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:12,324 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1278 transitions. [2019-11-24 04:49:12,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:49:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1278 transitions. [2019-11-24 04:49:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 04:49:12,333 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:12,334 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 04:49:12,334 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:12,335 INFO L82 PathProgramCache]: Analyzing trace with hash -514969773, now seen corresponding path program 1 times [2019-11-24 04:49:12,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:12,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926377782] [2019-11-24 04:49:12,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:12,419 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 04:49:12,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926377782] [2019-11-24 04:49:12,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:12,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:49:12,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301067095] [2019-11-24 04:49:12,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:49:12,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:12,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:49:12,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:49:12,422 INFO L87 Difference]: Start difference. First operand 718 states and 1278 transitions. Second operand 3 states. [2019-11-24 04:49:12,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:12,596 INFO L93 Difference]: Finished difference Result 2118 states and 3766 transitions. [2019-11-24 04:49:12,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:49:12,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-24 04:49:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:12,606 INFO L225 Difference]: With dead ends: 2118 [2019-11-24 04:49:12,606 INFO L226 Difference]: Without dead ends: 1402 [2019-11-24 04:49:12,609 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 04:49:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2019-11-24 04:49:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1390. [2019-11-24 04:49:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1390 states. [2019-11-24 04:49:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 2446 transitions. [2019-11-24 04:49:12,699 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 2446 transitions. Word has length 21 [2019-11-24 04:49:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:12,700 INFO L462 AbstractCegarLoop]: Abstraction has 1390 states and 2446 transitions. [2019-11-24 04:49:12,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:49:12,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 2446 transitions. [2019-11-24 04:49:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-24 04:49:12,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:12,703 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 04:49:12,703 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:12,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1444142634, now seen corresponding path program 1 times [2019-11-24 04:49:12,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:12,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681298965] [2019-11-24 04:49:12,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:12,943 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 04:49:12,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681298965] [2019-11-24 04:49:12,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:49:12,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:49:12,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316432884] [2019-11-24 04:49:12,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:49:12,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:49:12,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:49:12,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:49:12,947 INFO L87 Difference]: Start difference. First operand 1390 states and 2446 transitions. Second operand 6 states. [2019-11-24 04:49:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:49:13,535 INFO L93 Difference]: Finished difference Result 1761 states and 3082 transitions. [2019-11-24 04:49:13,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:49:13,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-24 04:49:13,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:49:13,555 INFO L225 Difference]: With dead ends: 1761 [2019-11-24 04:49:13,555 INFO L226 Difference]: Without dead ends: 1759 [2019-11-24 04:49:13,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:49:13,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2019-11-24 04:49:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1737. [2019-11-24 04:49:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1737 states. [2019-11-24 04:49:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 3058 transitions. [2019-11-24 04:49:13,691 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 3058 transitions. Word has length 22 [2019-11-24 04:49:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:49:13,692 INFO L462 AbstractCegarLoop]: Abstraction has 1737 states and 3058 transitions. [2019-11-24 04:49:13,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:49:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 3058 transitions. [2019-11-24 04:49:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-24 04:49:13,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:49:13,694 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] [2019-11-24 04:49:13,694 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:49:13,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:49:13,695 INFO L82 PathProgramCache]: Analyzing trace with hash -415178392, now seen corresponding path program 1 times [2019-11-24 04:49:13,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:49:13,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801261601] [2019-11-24 04:49:13,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:49:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:14,028 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 04:49:14,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801261601] [2019-11-24 04:49:14,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040709874] [2019-11-24 04:49:14,029 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 04:49:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:49:14,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 04:49:14,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:49:14,481 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 04:49:14,481 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:49:14,526 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 04:49:14,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711006871] [2019-11-24 04:49:14,582 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-11-24 04:49:14,582 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:49:14,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:49:14,604 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:49:14,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:49:47,247 WARN L192 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 652 [2019-11-24 04:49:50,473 WARN L192 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 289 DAG size of output: 235 [2019-11-24 04:49:50,822 WARN L192 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 691 [2019-11-24 04:49:51,066 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8