/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_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:32:38,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:32:38,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:32:38,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:32:38,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:32:38,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:32:38,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:32:38,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:32:38,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:32:38,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:32:38,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:32:38,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:32:38,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:32:38,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:32:38,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:32:38,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:32:38,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:32:38,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:32:38,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:32:38,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:32:38,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:32:38,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:32:38,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:32:38,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:32:38,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:32:38,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:32:38,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:32:38,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:32:38,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:32:38,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:32:38,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:32:38,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:32:38,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:32:38,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:32:38,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:32:38,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:32:38,935 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 04:32:38,950 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:32:38,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:32:38,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:32:38,952 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:32:38,952 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:32:38,952 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:32:38,952 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:32:38,952 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:32:38,953 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:32:38,953 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:32:38,953 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:32:38,953 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:32:38,953 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:32:38,954 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:32:38,954 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:32:38,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:32:38,955 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:32:38,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:32:38,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:32:38,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:32:38,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:32:38,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:32:38,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:32:38,956 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:32:38,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:32:38,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:32:38,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:32:38,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:32:38,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:32:38,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:32:38,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:32:38,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:32:38,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:32:38,958 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:32:38,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:32:38,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:32:38,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:32:38,959 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:32:39,249 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:32:39,261 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:32:39,264 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:32:39,265 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:32:39,266 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:32:39,266 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product21.cil.c [2019-11-24 04:32:39,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/929e39048/67ca719fc181453a8998ff4b70c3e03e/FLAGa2c2f5fdc [2019-11-24 04:32:39,908 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:32:39,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product21.cil.c [2019-11-24 04:32:39,931 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/929e39048/67ca719fc181453a8998ff4b70c3e03e/FLAGa2c2f5fdc [2019-11-24 04:32:40,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/929e39048/67ca719fc181453a8998ff4b70c3e03e [2019-11-24 04:32:40,179 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:32:40,181 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:32:40,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:32:40,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:32:40,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:32:40,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:32:40" (1/1) ... [2019-11-24 04:32:40,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f632913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:40, skipping insertion in model container [2019-11-24 04:32:40,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:32:40" (1/1) ... [2019-11-24 04:32:40,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:32:40,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:32:40,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:32:40,988 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:32:41,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:32:41,246 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:32:41,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41 WrapperNode [2019-11-24 04:32:41,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:32:41,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:32:41,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:32:41,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:32:41,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (1/1) ... [2019-11-24 04:32:41,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (1/1) ... [2019-11-24 04:32:41,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:32:41,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:32:41,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:32:41,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:32:41,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (1/1) ... [2019-11-24 04:32:41,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (1/1) ... [2019-11-24 04:32:41,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (1/1) ... [2019-11-24 04:32:41,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (1/1) ... [2019-11-24 04:32:41,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (1/1) ... [2019-11-24 04:32:42,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (1/1) ... [2019-11-24 04:32:42,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (1/1) ... [2019-11-24 04:32:42,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:32:42,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:32:42,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:32:42,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:32:42,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (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 04:32:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:32:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:32:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:32:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:33:52,339 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:33:52,340 INFO L284 CfgBuilder]: Removed 1891 assume(true) statements. [2019-11-24 04:33:52,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:33:52 BoogieIcfgContainer [2019-11-24 04:33:52,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:33:52,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:33:52,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:33:52,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:33:52,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:32:40" (1/3) ... [2019-11-24 04:33:52,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13876528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:33:52, skipping insertion in model container [2019-11-24 04:33:52,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:32:41" (2/3) ... [2019-11-24 04:33:52,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13876528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:33:52, skipping insertion in model container [2019-11-24 04:33:52,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:33:52" (3/3) ... [2019-11-24 04:33:52,351 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product21.cil.c [2019-11-24 04:33:52,359 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:33:52,369 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2019-11-24 04:33:52,381 INFO L249 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2019-11-24 04:33:52,428 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:33:52,428 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:33:52,428 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:33:52,428 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:33:52,429 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:33:52,429 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:33:52,429 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:33:52,429 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:33:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states. [2019-11-24 04:33:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 04:33:52,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:33:52,515 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 04:33:52,516 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 04:33:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:33:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash -916752847, now seen corresponding path program 1 times [2019-11-24 04:33:52,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:33:52,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104614089] [2019-11-24 04:33:52,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:33:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:33:53,031 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 04:33:53,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104614089] [2019-11-24 04:33:53,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:33:53,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:33:53,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792944219] [2019-11-24 04:33:53,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:33:53,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:33:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:33:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:33:53,054 INFO L87 Difference]: Start difference. First operand 3693 states. Second operand 2 states. [2019-11-24 04:33:53,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:33:53,266 INFO L93 Difference]: Finished difference Result 6760 states and 12968 transitions. [2019-11-24 04:33:53,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:33:53,268 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2019-11-24 04:33:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:33:53,309 INFO L225 Difference]: With dead ends: 6760 [2019-11-24 04:33:53,310 INFO L226 Difference]: Without dead ends: 3691 [2019-11-24 04:33:53,322 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:33:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3691 states. [2019-11-24 04:33:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3691 to 3691. [2019-11-24 04:33:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3691 states. [2019-11-24 04:33:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3691 states to 3691 states and 7016 transitions. [2019-11-24 04:33:53,546 INFO L78 Accepts]: Start accepts. Automaton has 3691 states and 7016 transitions. Word has length 24 [2019-11-24 04:33:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:33:53,547 INFO L462 AbstractCegarLoop]: Abstraction has 3691 states and 7016 transitions. [2019-11-24 04:33:53,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:33:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3691 states and 7016 transitions. [2019-11-24 04:33:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 04:33:53,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:33:53,556 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 04:33:53,564 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 04:33:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:33:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1440534274, now seen corresponding path program 1 times [2019-11-24 04:33:53,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:33:53,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462968931] [2019-11-24 04:33:53,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:33:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:33:53,920 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 04:33:53,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462968931] [2019-11-24 04:33:53,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:33:53,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:33:53,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301131509] [2019-11-24 04:33:53,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:33:53,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:33:53,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:33:53,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:33:53,927 INFO L87 Difference]: Start difference. First operand 3691 states and 7016 transitions. Second operand 5 states. [2019-11-24 04:33:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:33:56,026 INFO L93 Difference]: Finished difference Result 9815 states and 18272 transitions. [2019-11-24 04:33:56,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:33:56,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-24 04:33:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:33:56,078 INFO L225 Difference]: With dead ends: 9815 [2019-11-24 04:33:56,079 INFO L226 Difference]: Without dead ends: 6716 [2019-11-24 04:33:56,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 04:33:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6716 states. [2019-11-24 04:33:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6716 to 3716. [2019-11-24 04:33:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3716 states. [2019-11-24 04:33:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7041 transitions. [2019-11-24 04:33:56,268 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7041 transitions. Word has length 24 [2019-11-24 04:33:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:33:56,269 INFO L462 AbstractCegarLoop]: Abstraction has 3716 states and 7041 transitions. [2019-11-24 04:33:56,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:33:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7041 transitions. [2019-11-24 04:33:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-24 04:33:56,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:33:56,273 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 04:33:56,274 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 04:33:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:33:56,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1446273898, now seen corresponding path program 1 times [2019-11-24 04:33:56,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:33:56,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945757522] [2019-11-24 04:33:56,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:33:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:33:56,433 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 04:33:56,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945757522] [2019-11-24 04:33:56,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:33:56,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:33:56,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306266646] [2019-11-24 04:33:56,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:33:56,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:33:56,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:33:56,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:33:56,438 INFO L87 Difference]: Start difference. First operand 3716 states and 7041 transitions. Second operand 3 states. [2019-11-24 04:33:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:33:59,960 INFO L93 Difference]: Finished difference Result 9347 states and 17609 transitions. [2019-11-24 04:33:59,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:33:59,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-11-24 04:33:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:33:59,993 INFO L225 Difference]: With dead ends: 9347 [2019-11-24 04:33:59,993 INFO L226 Difference]: Without dead ends: 5875 [2019-11-24 04:34:00,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 04:34:00,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2019-11-24 04:34:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 5803. [2019-11-24 04:34:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5803 states. [2019-11-24 04:34:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 10651 transitions. [2019-11-24 04:34:00,164 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 10651 transitions. Word has length 27 [2019-11-24 04:34:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:34:00,164 INFO L462 AbstractCegarLoop]: Abstraction has 5803 states and 10651 transitions. [2019-11-24 04:34:00,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:34:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 10651 transitions. [2019-11-24 04:34:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-24 04:34:00,169 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:34:00,169 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, 1, 1] [2019-11-24 04:34:00,169 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 04:34:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:34:00,170 INFO L82 PathProgramCache]: Analyzing trace with hash 987644494, now seen corresponding path program 1 times [2019-11-24 04:34:00,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:34:00,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349389746] [2019-11-24 04:34:00,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:34:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:34:00,300 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 04:34:00,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349389746] [2019-11-24 04:34:00,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:34:00,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:34:00,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458815239] [2019-11-24 04:34:00,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:34:00,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:34:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:34:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:34:00,303 INFO L87 Difference]: Start difference. First operand 5803 states and 10651 transitions. Second operand 3 states. [2019-11-24 04:34:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:34:00,599 INFO L93 Difference]: Finished difference Result 14863 states and 27418 transitions. [2019-11-24 04:34:00,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:34:00,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-24 04:34:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:34:00,646 INFO L225 Difference]: With dead ends: 14863 [2019-11-24 04:34:00,646 INFO L226 Difference]: Without dead ends: 9613 [2019-11-24 04:34:00,656 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 04:34:00,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9613 states. [2019-11-24 04:34:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9613 to 5543. [2019-11-24 04:34:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5543 states. [2019-11-24 04:34:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5543 states to 5543 states and 10131 transitions. [2019-11-24 04:34:00,828 INFO L78 Accepts]: Start accepts. Automaton has 5543 states and 10131 transitions. Word has length 29 [2019-11-24 04:34:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:34:00,829 INFO L462 AbstractCegarLoop]: Abstraction has 5543 states and 10131 transitions. [2019-11-24 04:34:00,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:34:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 5543 states and 10131 transitions. [2019-11-24 04:34:00,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-24 04:34:00,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:34:00,833 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, 1, 1, 1, 1] [2019-11-24 04:34:00,833 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 04:34:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:34:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash 635912082, now seen corresponding path program 1 times [2019-11-24 04:34:00,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:34:00,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781186813] [2019-11-24 04:34:00,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:34:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:34:00,972 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 04:34:00,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781186813] [2019-11-24 04:34:00,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:34:00,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:34:00,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314888323] [2019-11-24 04:34:00,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:34:00,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:34:00,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:34:00,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:34:00,977 INFO L87 Difference]: Start difference. First operand 5543 states and 10131 transitions. Second operand 4 states.