/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_spec13_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:34:03,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:34:03,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:34:03,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:34:03,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:34:03,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:34:03,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:34:03,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:34:03,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:34:03,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:34:03,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:34:03,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:34:03,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:34:03,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:34:03,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:34:03,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:34:03,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:34:03,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:34:03,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:34:03,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:34:03,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:34:03,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:34:03,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:34:03,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:34:03,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:34:03,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:34:03,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:34:03,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:34:03,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:34:03,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:34:03,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:34:03,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:34:03,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:34:03,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:34:03,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:34:03,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:34:03,644 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 04:34:03,659 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:34:03,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:34:03,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:34:03,660 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:34:03,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:34:03,661 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:34:03,661 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:34:03,661 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:34:03,661 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:34:03,661 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:34:03,662 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:34:03,662 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:34:03,662 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:34:03,662 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:34:03,662 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:34:03,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:34:03,663 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:34:03,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:34:03,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:34:03,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:34:03,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:34:03,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:34:03,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:34:03,665 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:34:03,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:34:03,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:34:03,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:34:03,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:34:03,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:34:03,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:34:03,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:34:03,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:34:03,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:34:03,667 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:34:03,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:34:03,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:34:03,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:34:03,668 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:34:03,960 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:34:03,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:34:03,980 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:34:03,982 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:34:03,982 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:34:03,983 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2019-11-24 04:34:04,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfe58664e/5c980b2065c0421e81f92c7205f015d7/FLAGa5d43cf7f [2019-11-24 04:34:04,663 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:34:04,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product23.cil.c [2019-11-24 04:34:04,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfe58664e/5c980b2065c0421e81f92c7205f015d7/FLAGa5d43cf7f [2019-11-24 04:34:04,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfe58664e/5c980b2065c0421e81f92c7205f015d7 [2019-11-24 04:34:04,854 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:34:04,856 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:34:04,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:34:04,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:34:04,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:34:04,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:34:04" (1/1) ... [2019-11-24 04:34:04,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ddc826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:04, skipping insertion in model container [2019-11-24 04:34:04,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:34:04" (1/1) ... [2019-11-24 04:34:04,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:34:04,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:34:05,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:34:05,578 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:34:05,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:34:05,827 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:34:05,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05 WrapperNode [2019-11-24 04:34:05,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:34:05,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:34:05,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:34:05,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:34:05,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (1/1) ... [2019-11-24 04:34:05,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (1/1) ... [2019-11-24 04:34:06,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:34:06,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:34:06,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:34:06,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:34:06,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (1/1) ... [2019-11-24 04:34:06,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (1/1) ... [2019-11-24 04:34:06,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (1/1) ... [2019-11-24 04:34:06,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (1/1) ... [2019-11-24 04:34:06,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (1/1) ... [2019-11-24 04:34:06,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (1/1) ... [2019-11-24 04:34:06,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (1/1) ... [2019-11-24 04:34:07,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:34:07,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:34:07,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:34:07,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:34:07,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (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 04:34:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:34:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:34:07,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:34:07,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:35:18,469 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:35:18,469 INFO L284 CfgBuilder]: Removed 2071 assume(true) statements. [2019-11-24 04:35:18,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:35:18 BoogieIcfgContainer [2019-11-24 04:35:18,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:35:18,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:35:18,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:35:18,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:35:18,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:34:04" (1/3) ... [2019-11-24 04:35:18,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51023834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:35:18, skipping insertion in model container [2019-11-24 04:35:18,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:34:05" (2/3) ... [2019-11-24 04:35:18,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51023834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:35:18, skipping insertion in model container [2019-11-24 04:35:18,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:35:18" (3/3) ... [2019-11-24 04:35:18,480 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product23.cil.c [2019-11-24 04:35:18,490 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:35:18,500 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2019-11-24 04:35:18,512 INFO L249 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2019-11-24 04:35:18,553 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:35:18,553 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:35:18,553 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:35:18,553 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:35:18,554 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:35:18,554 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:35:18,554 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:35:18,554 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:35:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3713 states. [2019-11-24 04:35:18,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 04:35:18,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:18,646 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] [2019-11-24 04:35:18,647 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 04:35:18,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:18,652 INFO L82 PathProgramCache]: Analyzing trace with hash 678038476, now seen corresponding path program 1 times [2019-11-24 04:35:18,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:18,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346150876] [2019-11-24 04:35:18,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:19,132 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 04:35:19,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346150876] [2019-11-24 04:35:19,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:19,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:35:19,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990062121] [2019-11-24 04:35:19,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:35:19,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:19,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:35:19,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:35:19,157 INFO L87 Difference]: Start difference. First operand 3713 states. Second operand 3 states. [2019-11-24 04:35:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:35:19,665 INFO L93 Difference]: Finished difference Result 9127 states and 17515 transitions. [2019-11-24 04:35:19,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:35:19,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-24 04:35:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:35:19,729 INFO L225 Difference]: With dead ends: 9127 [2019-11-24 04:35:19,730 INFO L226 Difference]: Without dead ends: 6027 [2019-11-24 04:35:19,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:35:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6027 states. [2019-11-24 04:35:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6027 to 3581. [2019-11-24 04:35:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3581 states. [2019-11-24 04:35:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 6786 transitions. [2019-11-24 04:35:19,993 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 6786 transitions. Word has length 21 [2019-11-24 04:35:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:35:19,994 INFO L462 AbstractCegarLoop]: Abstraction has 3581 states and 6786 transitions. [2019-11-24 04:35:19,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:35:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 6786 transitions. [2019-11-24 04:35:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-24 04:35:20,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:20,002 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] [2019-11-24 04:35:20,002 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 04:35:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:20,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1334277200, now seen corresponding path program 1 times [2019-11-24 04:35:20,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:20,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203181588] [2019-11-24 04:35:20,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:20,210 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 04:35:20,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203181588] [2019-11-24 04:35:20,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:20,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:35:20,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45518860] [2019-11-24 04:35:20,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:35:20,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:20,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:35:20,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:35:20,215 INFO L87 Difference]: Start difference. First operand 3581 states and 6786 transitions. Second operand 4 states. [2019-11-24 04:35:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:35:21,113 INFO L93 Difference]: Finished difference Result 13732 states and 26279 transitions. [2019-11-24 04:35:21,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:35:21,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-24 04:35:21,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:35:21,202 INFO L225 Difference]: With dead ends: 13732 [2019-11-24 04:35:21,203 INFO L226 Difference]: Without dead ends: 10830 [2019-11-24 04:35:21,218 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 04:35:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10830 states. [2019-11-24 04:35:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10830 to 3591. [2019-11-24 04:35:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3591 states. [2019-11-24 04:35:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3591 states to 3591 states and 6796 transitions. [2019-11-24 04:35:21,986 INFO L78 Accepts]: Start accepts. Automaton has 3591 states and 6796 transitions. Word has length 23 [2019-11-24 04:35:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:35:21,987 INFO L462 AbstractCegarLoop]: Abstraction has 3591 states and 6796 transitions. [2019-11-24 04:35:21,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:35:21,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3591 states and 6796 transitions. [2019-11-24 04:35:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 04:35:21,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:21,992 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 04:35:21,993 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 04:35:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1845302770, now seen corresponding path program 1 times [2019-11-24 04:35:21,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:21,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123249946] [2019-11-24 04:35:21,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:22,135 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 04:35:22,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123249946] [2019-11-24 04:35:22,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:22,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:35:22,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368879095] [2019-11-24 04:35:22,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:35:22,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:35:22,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:35:22,138 INFO L87 Difference]: Start difference. First operand 3591 states and 6796 transitions. Second operand 4 states. [2019-11-24 04:35:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:35:22,875 INFO L93 Difference]: Finished difference Result 9193 states and 17424 transitions. [2019-11-24 04:35:22,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:35:22,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-11-24 04:35:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:35:22,915 INFO L225 Difference]: With dead ends: 9193 [2019-11-24 04:35:22,916 INFO L226 Difference]: Without dead ends: 6262 [2019-11-24 04:35:22,922 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 04:35:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6262 states. [2019-11-24 04:35:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6262 to 6244. [2019-11-24 04:35:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6244 states. [2019-11-24 04:35:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6244 states to 6244 states and 11867 transitions. [2019-11-24 04:35:23,180 INFO L78 Accepts]: Start accepts. Automaton has 6244 states and 11867 transitions. Word has length 24 [2019-11-24 04:35:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:35:23,180 INFO L462 AbstractCegarLoop]: Abstraction has 6244 states and 11867 transitions. [2019-11-24 04:35:23,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:35:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 6244 states and 11867 transitions. [2019-11-24 04:35:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-24 04:35:23,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:23,186 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 04:35:23,187 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 04:35:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:23,187 INFO L82 PathProgramCache]: Analyzing trace with hash 744173156, now seen corresponding path program 1 times [2019-11-24 04:35:23,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:23,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879700884] [2019-11-24 04:35:23,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:23,376 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 04:35:23,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879700884] [2019-11-24 04:35:23,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:23,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:35:23,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099008111] [2019-11-24 04:35:23,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:35:23,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:23,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:35:23,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:35:23,383 INFO L87 Difference]: Start difference. First operand 6244 states and 11867 transitions. Second operand 3 states. [2019-11-24 04:35:24,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:35:24,735 INFO L93 Difference]: Finished difference Result 15724 states and 29797 transitions. [2019-11-24 04:35:24,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:35:24,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2019-11-24 04:35:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:35:24,777 INFO L225 Difference]: With dead ends: 15724 [2019-11-24 04:35:24,777 INFO L226 Difference]: Without dead ends: 9910 [2019-11-24 04:35:24,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:35:24,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9910 states. [2019-11-24 04:35:25,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9910 to 9633. [2019-11-24 04:35:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9633 states. [2019-11-24 04:35:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9633 states to 9633 states and 18096 transitions. [2019-11-24 04:35:25,194 INFO L78 Accepts]: Start accepts. Automaton has 9633 states and 18096 transitions. Word has length 26 [2019-11-24 04:35:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:35:25,195 INFO L462 AbstractCegarLoop]: Abstraction has 9633 states and 18096 transitions. [2019-11-24 04:35:25,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:35:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 9633 states and 18096 transitions. [2019-11-24 04:35:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-24 04:35:25,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:35:25,204 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:35:25,205 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 04:35:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:35:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1230545096, now seen corresponding path program 1 times [2019-11-24 04:35:25,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:35:25,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39683104] [2019-11-24 04:35:25,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:35:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:35:25,357 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 04:35:25,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39683104] [2019-11-24 04:35:25,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:35:25,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:35:25,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070318581] [2019-11-24 04:35:25,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:35:25,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:35:25,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:35:25,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:35:25,359 INFO L87 Difference]: Start difference. First operand 9633 states and 18096 transitions. Second operand 3 states.