/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/elevator_spec3_product25.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:45:53,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:45:53,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:45:53,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:45:53,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:45:53,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:45:53,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:45:53,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:45:53,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:45:53,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:45:53,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:45:53,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:45:53,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:45:53,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:45:53,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:45:53,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:45:53,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:45:53,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:45:53,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:45:53,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:45:53,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:45:53,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:45:53,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:45:53,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:45:53,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:45:53,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:45:53,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:45:53,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:45:53,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:45:53,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:45:53,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:45:53,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:45:53,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:45:53,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:45:53,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:45:53,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:45:53,651 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 04:45:53,665 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:45:53,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:45:53,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:45:53,666 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:45:53,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:45:53,667 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:45:53,667 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:45:53,667 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:45:53,667 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:45:53,668 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:45:53,668 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:45:53,668 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:45:53,668 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:45:53,668 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:45:53,669 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:45:53,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:45:53,669 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:45:53,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:45:53,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:45:53,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:45:53,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:45:53,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:45:53,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:45:53,671 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:45:53,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:45:53,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:45:53,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:45:53,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:45:53,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:45:53,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:45:53,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:45:53,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:45:53,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:45:53,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:45:53,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:45:53,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:45:53,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:45:53,674 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:45:53,964 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:45:53,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:45:53,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:45:53,990 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:45:53,991 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:45:53,991 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product25.cil.c [2019-11-24 04:45:54,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f32f33e7b/573ba52c75ef4819960ec7e830fabbc4/FLAGeb21bcf5f [2019-11-24 04:45:54,689 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:45:54,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product25.cil.c [2019-11-24 04:45:54,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f32f33e7b/573ba52c75ef4819960ec7e830fabbc4/FLAGeb21bcf5f [2019-11-24 04:45:54,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f32f33e7b/573ba52c75ef4819960ec7e830fabbc4 [2019-11-24 04:45:54,882 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:45:54,884 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:45:54,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:45:54,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:45:54,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:45:54,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:45:54" (1/1) ... [2019-11-24 04:45:54,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4339661a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:54, skipping insertion in model container [2019-11-24 04:45:54,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:45:54" (1/1) ... [2019-11-24 04:45:54,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:45:54,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:45:55,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:45:55,691 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:45:55,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:45:55,882 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:45:55,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55 WrapperNode [2019-11-24 04:45:55,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:45:55,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:45:55,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:45:55,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:45:55,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (1/1) ... [2019-11-24 04:45:55,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (1/1) ... [2019-11-24 04:45:56,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:45:56,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:45:56,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:45:56,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:45:56,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (1/1) ... [2019-11-24 04:45:56,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (1/1) ... [2019-11-24 04:45:56,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (1/1) ... [2019-11-24 04:45:56,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (1/1) ... [2019-11-24 04:45:56,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (1/1) ... [2019-11-24 04:45:56,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (1/1) ... [2019-11-24 04:45:56,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (1/1) ... [2019-11-24 04:45:56,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:45:56,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:45:56,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:45:56,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:45:56,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (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 04:45:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:45:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:45:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:45:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:46:56,654 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:46:56,655 INFO L284 CfgBuilder]: Removed 1467 assume(true) statements. [2019-11-24 04:46:56,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:46:56 BoogieIcfgContainer [2019-11-24 04:46:56,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:46:56,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:46:56,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:46:56,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:46:56,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:45:54" (1/3) ... [2019-11-24 04:46:56,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6fa752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:46:56, skipping insertion in model container [2019-11-24 04:46:56,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:45:55" (2/3) ... [2019-11-24 04:46:56,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6fa752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:46:56, skipping insertion in model container [2019-11-24 04:46:56,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:46:56" (3/3) ... [2019-11-24 04:46:56,665 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product25.cil.c [2019-11-24 04:46:56,674 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:46:56,682 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2019-11-24 04:46:56,692 INFO L249 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2019-11-24 04:46:56,730 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:46:56,730 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:46:56,731 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:46:56,731 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:46:56,731 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:46:56,731 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:46:56,731 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:46:56,731 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:46:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states. [2019-11-24 04:46:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:46:56,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:46:56,784 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:46:56,785 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:46:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:46:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash 701215325, now seen corresponding path program 1 times [2019-11-24 04:46:56,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:46:56,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715373681] [2019-11-24 04:46:56,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:46:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:46:57,262 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 04:46:57,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715373681] [2019-11-24 04:46:57,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:46:57,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:46:57,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863090347] [2019-11-24 04:46:57,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:46:57,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:46:57,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:46:57,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:46:57,287 INFO L87 Difference]: Start difference. First operand 1878 states. Second operand 4 states. [2019-11-24 04:46:57,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:46:57,592 INFO L93 Difference]: Finished difference Result 5161 states and 9944 transitions. [2019-11-24 04:46:57,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:46:57,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 04:46:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:46:57,638 INFO L225 Difference]: With dead ends: 5161 [2019-11-24 04:46:57,638 INFO L226 Difference]: Without dead ends: 3291 [2019-11-24 04:46:57,651 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 04:46:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2019-11-24 04:46:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 1867. [2019-11-24 04:46:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1867 states. [2019-11-24 04:46:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3583 transitions. [2019-11-24 04:46:57,790 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3583 transitions. Word has length 15 [2019-11-24 04:46:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:46:57,791 INFO L462 AbstractCegarLoop]: Abstraction has 1867 states and 3583 transitions. [2019-11-24 04:46:57,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:46:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3583 transitions. [2019-11-24 04:46:57,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:46:57,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:46:57,793 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:46:57,794 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:46:57,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:46:57,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1169307414, now seen corresponding path program 1 times [2019-11-24 04:46:57,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:46:57,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667821629] [2019-11-24 04:46:57,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:46:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:46:57,918 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 04:46:57,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667821629] [2019-11-24 04:46:57,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:46:57,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:46:57,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046927873] [2019-11-24 04:46:57,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:46:57,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:46:57,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:46:57,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:46:57,922 INFO L87 Difference]: Start difference. First operand 1867 states and 3583 transitions. Second operand 4 states. [2019-11-24 04:47:00,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:47:00,165 INFO L93 Difference]: Finished difference Result 7028 states and 13442 transitions. [2019-11-24 04:47:00,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:47:00,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 04:47:00,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:47:00,202 INFO L225 Difference]: With dead ends: 7028 [2019-11-24 04:47:00,202 INFO L226 Difference]: Without dead ends: 5173 [2019-11-24 04:47:00,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:47:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5173 states. [2019-11-24 04:47:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5173 to 2469. [2019-11-24 04:47:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2019-11-24 04:47:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 4712 transitions. [2019-11-24 04:47:00,339 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 4712 transitions. Word has length 15 [2019-11-24 04:47:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:47:00,339 INFO L462 AbstractCegarLoop]: Abstraction has 2469 states and 4712 transitions. [2019-11-24 04:47:00,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:47:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 4712 transitions. [2019-11-24 04:47:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:47:00,341 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:47:00,342 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:47:00,342 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:47:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:47:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash -708316915, now seen corresponding path program 1 times [2019-11-24 04:47:00,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:47:00,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697632918] [2019-11-24 04:47:00,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:47:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:47:00,462 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 04:47:00,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697632918] [2019-11-24 04:47:00,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:47:00,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:47:00,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532990668] [2019-11-24 04:47:00,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:47:00,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:47:00,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:47:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:47:00,465 INFO L87 Difference]: Start difference. First operand 2469 states and 4712 transitions. Second operand 3 states. [2019-11-24 04:47:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:47:03,376 INFO L93 Difference]: Finished difference Result 4933 states and 9418 transitions. [2019-11-24 04:47:03,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:47:03,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 04:47:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:47:03,390 INFO L225 Difference]: With dead ends: 4933 [2019-11-24 04:47:03,390 INFO L226 Difference]: Without dead ends: 2469 [2019-11-24 04:47:03,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 04:47:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2019-11-24 04:47:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2469. [2019-11-24 04:47:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2019-11-24 04:47:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 4708 transitions. [2019-11-24 04:47:03,475 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 4708 transitions. Word has length 16 [2019-11-24 04:47:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:47:03,476 INFO L462 AbstractCegarLoop]: Abstraction has 2469 states and 4708 transitions. [2019-11-24 04:47:03,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:47:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 4708 transitions. [2019-11-24 04:47:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:47:03,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:47:03,477 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:47:03,478 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:47:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:47:03,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1189715520, now seen corresponding path program 1 times [2019-11-24 04:47:03,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:47:03,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843694945] [2019-11-24 04:47:03,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:47:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:47:03,591 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 04:47:03,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843694945] [2019-11-24 04:47:03,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:47:03,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:47:03,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953060529] [2019-11-24 04:47:03,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:47:03,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:47:03,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:47:03,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:47:03,594 INFO L87 Difference]: Start difference. First operand 2469 states and 4708 transitions. Second operand 5 states. [2019-11-24 04:47:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:47:04,174 INFO L93 Difference]: Finished difference Result 7315 states and 13909 transitions. [2019-11-24 04:47:04,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:47:04,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-24 04:47:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:47:04,210 INFO L225 Difference]: With dead ends: 7315 [2019-11-24 04:47:04,211 INFO L226 Difference]: Without dead ends: 5169 [2019-11-24 04:47:04,219 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 04:47:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2019-11-24 04:47:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 3393. [2019-11-24 04:47:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3393 states. [2019-11-24 04:47:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 6485 transitions. [2019-11-24 04:47:04,439 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 6485 transitions. Word has length 17 [2019-11-24 04:47:04,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:47:04,440 INFO L462 AbstractCegarLoop]: Abstraction has 3393 states and 6485 transitions. [2019-11-24 04:47:04,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:47:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 6485 transitions. [2019-11-24 04:47:04,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:47:04,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:47:04,442 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:47:04,443 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:47:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:47:04,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1182177572, now seen corresponding path program 1 times [2019-11-24 04:47:04,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:47:04,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853892695] [2019-11-24 04:47:04,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:47:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:47:04,589 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 04:47:04,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853892695] [2019-11-24 04:47:04,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:47:04,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:47:04,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612734460] [2019-11-24 04:47:04,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:47:04,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:47:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:47:04,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:47:04,594 INFO L87 Difference]: Start difference. First operand 3393 states and 6485 transitions. Second operand 3 states. [2019-11-24 04:47:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:47:06,574 INFO L93 Difference]: Finished difference Result 5962 states and 11355 transitions. [2019-11-24 04:47:06,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:47:06,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-24 04:47:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:47:06,602 INFO L225 Difference]: With dead ends: 5962 [2019-11-24 04:47:06,602 INFO L226 Difference]: Without dead ends: 3824 [2019-11-24 04:47:06,608 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 04:47:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2019-11-24 04:47:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3783. [2019-11-24 04:47:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3783 states. [2019-11-24 04:47:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 6999 transitions. [2019-11-24 04:47:06,839 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 6999 transitions. Word has length 17 [2019-11-24 04:47:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:47:06,841 INFO L462 AbstractCegarLoop]: Abstraction has 3783 states and 6999 transitions. [2019-11-24 04:47:06,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:47:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 6999 transitions. [2019-11-24 04:47:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 04:47:06,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:47:06,843 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:47:06,843 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:47:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:47:06,844 INFO L82 PathProgramCache]: Analyzing trace with hash -681521815, now seen corresponding path program 1 times [2019-11-24 04:47:06,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:47:06,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308774627] [2019-11-24 04:47:06,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:47:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:47:07,028 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 04:47:07,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308774627] [2019-11-24 04:47:07,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:47:07,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:47:07,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517356480] [2019-11-24 04:47:07,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:47:07,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:47:07,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:47:07,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:47:07,034 INFO L87 Difference]: Start difference. First operand 3783 states and 6999 transitions. Second operand 5 states. [2019-11-24 04:47:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:47:08,437 INFO L93 Difference]: Finished difference Result 7927 states and 14632 transitions. [2019-11-24 04:47:08,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:47:08,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-24 04:47:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:47:08,470 INFO L225 Difference]: With dead ends: 7927 [2019-11-24 04:47:08,471 INFO L226 Difference]: Without dead ends: 5686 [2019-11-24 04:47:08,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:47:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2019-11-24 04:47:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3783. [2019-11-24 04:47:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3783 states. [2019-11-24 04:47:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 6971 transitions. [2019-11-24 04:47:08,645 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 6971 transitions. Word has length 20 [2019-11-24 04:47:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:47:08,645 INFO L462 AbstractCegarLoop]: Abstraction has 3783 states and 6971 transitions. [2019-11-24 04:47:08,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:47:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 6971 transitions. [2019-11-24 04:47:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 04:47:08,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:47:08,647 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:47:08,647 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:47:08,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:47:08,647 INFO L82 PathProgramCache]: Analyzing trace with hash 722989517, now seen corresponding path program 1 times [2019-11-24 04:47:08,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:47:08,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117394801] [2019-11-24 04:47:08,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:47:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:47:08,783 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 04:47:08,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117394801] [2019-11-24 04:47:08,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:47:08,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:47:08,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317357586] [2019-11-24 04:47:08,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:47:08,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:47:08,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:47:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:47:08,786 INFO L87 Difference]: Start difference. First operand 3783 states and 6971 transitions. Second operand 4 states. [2019-11-24 04:47:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:47:09,189 INFO L93 Difference]: Finished difference Result 6319 states and 11534 transitions. [2019-11-24 04:47:09,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:47:09,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-11-24 04:47:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:47:09,203 INFO L225 Difference]: With dead ends: 6319 [2019-11-24 04:47:09,204 INFO L226 Difference]: Without dead ends: 3803 [2019-11-24 04:47:09,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:47:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3803 states. [2019-11-24 04:47:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3803 to 3783. [2019-11-24 04:47:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3783 states. [2019-11-24 04:47:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 6763 transitions. [2019-11-24 04:47:09,349 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 6763 transitions. Word has length 24 [2019-11-24 04:47:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:47:09,350 INFO L462 AbstractCegarLoop]: Abstraction has 3783 states and 6763 transitions. [2019-11-24 04:47:09,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:47:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 6763 transitions. [2019-11-24 04:47:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-24 04:47:09,352 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:47:09,352 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:47:09,352 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:47:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:47:09,352 INFO L82 PathProgramCache]: Analyzing trace with hash 894963845, now seen corresponding path program 1 times [2019-11-24 04:47:09,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:47:09,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59375594] [2019-11-24 04:47:09,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:47:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:47:09,438 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 04:47:09,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59375594] [2019-11-24 04:47:09,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:47:09,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:47:09,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185634558] [2019-11-24 04:47:09,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:47:09,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:47:09,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:47:09,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:47:09,441 INFO L87 Difference]: Start difference. First operand 3783 states and 6763 transitions. Second operand 4 states. [2019-11-24 04:47:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:47:10,010 INFO L93 Difference]: Finished difference Result 6123 states and 10834 transitions. [2019-11-24 04:47:10,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:47:10,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-24 04:47:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:47:10,019 INFO L225 Difference]: With dead ends: 6123 [2019-11-24 04:47:10,020 INFO L226 Difference]: Without dead ends: 3646 [2019-11-24 04:47:10,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:47:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2019-11-24 04:47:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3626. [2019-11-24 04:47:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3626 states. [2019-11-24 04:47:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 6378 transitions. [2019-11-24 04:47:10,148 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 6378 transitions. Word has length 25 [2019-11-24 04:47:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:47:10,149 INFO L462 AbstractCegarLoop]: Abstraction has 3626 states and 6378 transitions. [2019-11-24 04:47:10,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:47:10,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 6378 transitions. [2019-11-24 04:47:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-24 04:47:10,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:47:10,150 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:47:10,150 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:47:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:47:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash 471605722, now seen corresponding path program 1 times [2019-11-24 04:47:10,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:47:10,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535987695] [2019-11-24 04:47:10,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:47:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:47:10,246 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 04:47:10,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535987695] [2019-11-24 04:47:10,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:47:10,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:47:10,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568604474] [2019-11-24 04:47:10,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:47:10,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:47:10,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:47:10,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:47:10,248 INFO L87 Difference]: Start difference. First operand 3626 states and 6378 transitions. Second operand 6 states.