/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_spec2_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:43:17,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:43:17,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:43:17,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:43:17,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:43:17,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:43:17,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:43:17,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:43:17,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:43:17,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:43:17,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:43:17,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:43:17,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:43:17,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:43:17,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:43:17,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:43:17,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:43:17,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:43:17,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:43:17,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:43:17,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:43:17,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:43:17,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:43:17,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:43:17,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:43:17,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:43:17,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:43:17,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:43:17,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:43:17,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:43:17,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:43:17,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:43:17,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:43:17,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:43:17,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:43:17,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:43:17,327 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 04:43:17,346 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:43:17,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:43:17,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:43:17,350 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:43:17,351 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:43:17,351 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:43:17,351 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:43:17,351 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:43:17,351 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:43:17,351 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:43:17,352 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:43:17,352 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:43:17,352 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:43:17,352 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:43:17,352 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:43:17,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:43:17,355 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:43:17,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:43:17,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:43:17,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:43:17,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:43:17,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:43:17,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:43:17,357 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:43:17,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:43:17,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:43:17,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:43:17,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:43:17,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:43:17,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:43:17,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:43:17,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:43:17,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:43:17,361 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:43:17,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:43:17,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:43:17,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:43:17,362 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:43:17,660 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:43:17,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:43:17,676 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:43:17,678 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:43:17,678 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:43:17,679 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product30.cil.c [2019-11-24 04:43:17,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5ca5099/3c4f9c9e9cc841918f1fc513f14bedac/FLAGd6fe51ed9 [2019-11-24 04:43:18,388 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:43:18,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product30.cil.c [2019-11-24 04:43:18,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5ca5099/3c4f9c9e9cc841918f1fc513f14bedac/FLAGd6fe51ed9 [2019-11-24 04:43:18,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5ca5099/3c4f9c9e9cc841918f1fc513f14bedac [2019-11-24 04:43:18,601 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:43:18,603 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:43:18,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:43:18,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:43:18,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:43:18,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:43:18" (1/1) ... [2019-11-24 04:43:18,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc62c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:18, skipping insertion in model container [2019-11-24 04:43:18,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:43:18" (1/1) ... [2019-11-24 04:43:18,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:43:18,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:43:19,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:43:19,578 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:43:19,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:43:19,768 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:43:19,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19 WrapperNode [2019-11-24 04:43:19,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:43:19,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:43:19,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:43:19,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:43:19,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (1/1) ... [2019-11-24 04:43:19,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (1/1) ... [2019-11-24 04:43:20,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:43:20,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:43:20,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:43:20,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:43:20,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (1/1) ... [2019-11-24 04:43:20,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (1/1) ... [2019-11-24 04:43:20,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (1/1) ... [2019-11-24 04:43:20,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (1/1) ... [2019-11-24 04:43:20,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (1/1) ... [2019-11-24 04:43:20,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (1/1) ... [2019-11-24 04:43:20,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (1/1) ... [2019-11-24 04:43:20,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:43:20,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:43:20,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:43:20,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:43:20,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (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 04:43:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:43:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:43:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:43:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:44:18,921 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:44:18,921 INFO L284 CfgBuilder]: Removed 1565 assume(true) statements. [2019-11-24 04:44:18,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:44:18 BoogieIcfgContainer [2019-11-24 04:44:18,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:44:18,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:44:18,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:44:18,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:44:18,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:43:18" (1/3) ... [2019-11-24 04:44:18,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336ae7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:44:18, skipping insertion in model container [2019-11-24 04:44:18,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:19" (2/3) ... [2019-11-24 04:44:18,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336ae7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:44:18, skipping insertion in model container [2019-11-24 04:44:18,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:44:18" (3/3) ... [2019-11-24 04:44:18,931 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product30.cil.c [2019-11-24 04:44:18,940 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:44:18,949 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-24 04:44:18,958 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-24 04:44:18,997 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:44:18,997 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:44:18,998 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:44:18,998 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:44:18,998 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:44:18,998 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:44:18,998 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:44:18,999 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:44:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states. [2019-11-24 04:44:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:44:19,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:19,062 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:19,063 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:19,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:19,067 INFO L82 PathProgramCache]: Analyzing trace with hash -392008813, now seen corresponding path program 1 times [2019-11-24 04:44:19,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:19,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770196490] [2019-11-24 04:44:19,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:19,454 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 04:44:19,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770196490] [2019-11-24 04:44:19,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:19,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:44:19,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295994786] [2019-11-24 04:44:19,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:44:19,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:19,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:44:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:44:19,473 INFO L87 Difference]: Start difference. First operand 2417 states. Second operand 2 states. [2019-11-24 04:44:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:19,626 INFO L93 Difference]: Finished difference Result 2434 states and 4707 transitions. [2019-11-24 04:44:19,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:44:19,628 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-24 04:44:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:19,668 INFO L225 Difference]: With dead ends: 2434 [2019-11-24 04:44:19,669 INFO L226 Difference]: Without dead ends: 2415 [2019-11-24 04:44:19,676 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 04:44:19,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2019-11-24 04:44:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2415. [2019-11-24 04:44:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2415 states. [2019-11-24 04:44:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4677 transitions. [2019-11-24 04:44:19,831 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4677 transitions. Word has length 12 [2019-11-24 04:44:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:19,832 INFO L462 AbstractCegarLoop]: Abstraction has 2415 states and 4677 transitions. [2019-11-24 04:44:19,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:44:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4677 transitions. [2019-11-24 04:44:19,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:44:19,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:19,836 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:19,836 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash 652370581, now seen corresponding path program 1 times [2019-11-24 04:44:19,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:19,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945164065] [2019-11-24 04:44:19,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:20,029 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 04:44:20,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945164065] [2019-11-24 04:44:20,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:20,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:20,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403390850] [2019-11-24 04:44:20,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:44:20,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:20,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:44:20,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:20,034 INFO L87 Difference]: Start difference. First operand 2415 states and 4677 transitions. Second operand 3 states. [2019-11-24 04:44:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:20,605 INFO L93 Difference]: Finished difference Result 4488 states and 8686 transitions. [2019-11-24 04:44:20,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:44:20,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 04:44:20,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:20,630 INFO L225 Difference]: With dead ends: 4488 [2019-11-24 04:44:20,630 INFO L226 Difference]: Without dead ends: 3260 [2019-11-24 04:44:20,637 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 04:44:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2019-11-24 04:44:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3186. [2019-11-24 04:44:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3186 states. [2019-11-24 04:44:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 6169 transitions. [2019-11-24 04:44:20,771 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 6169 transitions. Word has length 13 [2019-11-24 04:44:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:20,771 INFO L462 AbstractCegarLoop]: Abstraction has 3186 states and 6169 transitions. [2019-11-24 04:44:20,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:44:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 6169 transitions. [2019-11-24 04:44:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:44:20,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:20,775 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:20,775 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:20,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:20,776 INFO L82 PathProgramCache]: Analyzing trace with hash 390963904, now seen corresponding path program 1 times [2019-11-24 04:44:20,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:20,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401622060] [2019-11-24 04:44:20,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:20,944 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 04:44:20,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401622060] [2019-11-24 04:44:20,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:20,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:20,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629028948] [2019-11-24 04:44:20,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:44:20,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:44:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:20,947 INFO L87 Difference]: Start difference. First operand 3186 states and 6169 transitions. Second operand 3 states. [2019-11-24 04:44:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:21,789 INFO L93 Difference]: Finished difference Result 6924 states and 13404 transitions. [2019-11-24 04:44:21,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:44:21,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 04:44:21,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:21,826 INFO L225 Difference]: With dead ends: 6924 [2019-11-24 04:44:21,836 INFO L226 Difference]: Without dead ends: 4942 [2019-11-24 04:44:21,845 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 04:44:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2019-11-24 04:44:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4718. [2019-11-24 04:44:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4718 states. [2019-11-24 04:44:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4718 states to 4718 states and 9135 transitions. [2019-11-24 04:44:22,009 INFO L78 Accepts]: Start accepts. Automaton has 4718 states and 9135 transitions. Word has length 15 [2019-11-24 04:44:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:22,010 INFO L462 AbstractCegarLoop]: Abstraction has 4718 states and 9135 transitions. [2019-11-24 04:44:22,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:44:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4718 states and 9135 transitions. [2019-11-24 04:44:22,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:44:22,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:22,014 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 04:44:22,014 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:22,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1710423571, now seen corresponding path program 1 times [2019-11-24 04:44:22,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:22,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801175201] [2019-11-24 04:44:22,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:22,117 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 04:44:22,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801175201] [2019-11-24 04:44:22,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:22,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:22,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682075869] [2019-11-24 04:44:22,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:44:22,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:22,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:44:22,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:22,121 INFO L87 Difference]: Start difference. First operand 4718 states and 9135 transitions. Second operand 3 states. [2019-11-24 04:44:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:22,717 INFO L93 Difference]: Finished difference Result 8219 states and 15909 transitions. [2019-11-24 04:44:22,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:44:22,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-24 04:44:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:22,754 INFO L225 Difference]: With dead ends: 8219 [2019-11-24 04:44:22,754 INFO L226 Difference]: Without dead ends: 4708 [2019-11-24 04:44:22,763 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 04:44:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2019-11-24 04:44:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4708. [2019-11-24 04:44:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4708 states. [2019-11-24 04:44:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 9109 transitions. [2019-11-24 04:44:22,999 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 9109 transitions. Word has length 17 [2019-11-24 04:44:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:22,999 INFO L462 AbstractCegarLoop]: Abstraction has 4708 states and 9109 transitions. [2019-11-24 04:44:22,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:44:23,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 9109 transitions. [2019-11-24 04:44:23,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 04:44:23,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:23,003 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:23,004 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:23,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:23,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1535720368, now seen corresponding path program 1 times [2019-11-24 04:44:23,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:23,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729472178] [2019-11-24 04:44:23,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:23,123 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 04:44:23,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729472178] [2019-11-24 04:44:23,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:23,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:23,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332174627] [2019-11-24 04:44:23,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:44:23,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:23,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:44:23,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:23,126 INFO L87 Difference]: Start difference. First operand 4708 states and 9109 transitions. Second operand 3 states. [2019-11-24 04:44:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:23,824 INFO L93 Difference]: Finished difference Result 11528 states and 22303 transitions. [2019-11-24 04:44:23,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:44:23,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-24 04:44:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:23,894 INFO L225 Difference]: With dead ends: 11528 [2019-11-24 04:44:23,894 INFO L226 Difference]: Without dead ends: 8044 [2019-11-24 04:44:23,902 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 04:44:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8044 states. [2019-11-24 04:44:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8044 to 7744. [2019-11-24 04:44:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7744 states. [2019-11-24 04:44:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7744 states to 7744 states and 14978 transitions. [2019-11-24 04:44:24,191 INFO L78 Accepts]: Start accepts. Automaton has 7744 states and 14978 transitions. Word has length 18 [2019-11-24 04:44:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:24,191 INFO L462 AbstractCegarLoop]: Abstraction has 7744 states and 14978 transitions. [2019-11-24 04:44:24,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:44:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7744 states and 14978 transitions. [2019-11-24 04:44:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 04:44:24,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:24,194 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:24,195 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:24,195 INFO L82 PathProgramCache]: Analyzing trace with hash -362651625, now seen corresponding path program 1 times [2019-11-24 04:44:24,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:24,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419935084] [2019-11-24 04:44:24,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:24,290 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 04:44:24,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419935084] [2019-11-24 04:44:24,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:24,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:24,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092326340] [2019-11-24 04:44:24,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:44:24,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:44:24,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:24,293 INFO L87 Difference]: Start difference. First operand 7744 states and 14978 transitions. Second operand 3 states. [2019-11-24 04:44:27,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:27,412 INFO L93 Difference]: Finished difference Result 7744 states and 14978 transitions. [2019-11-24 04:44:27,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:44:27,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-24 04:44:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:27,431 INFO L225 Difference]: With dead ends: 7744 [2019-11-24 04:44:27,431 INFO L226 Difference]: Without dead ends: 7737 [2019-11-24 04:44:27,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 04:44:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7737 states. [2019-11-24 04:44:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7737 to 7737. [2019-11-24 04:44:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7737 states. [2019-11-24 04:44:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7737 states to 7737 states and 14966 transitions. [2019-11-24 04:44:27,696 INFO L78 Accepts]: Start accepts. Automaton has 7737 states and 14966 transitions. Word has length 19 [2019-11-24 04:44:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:27,696 INFO L462 AbstractCegarLoop]: Abstraction has 7737 states and 14966 transitions. [2019-11-24 04:44:27,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:44:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 7737 states and 14966 transitions. [2019-11-24 04:44:27,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-24 04:44:27,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:27,704 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, 1] [2019-11-24 04:44:27,704 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:27,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1729781293, now seen corresponding path program 1 times [2019-11-24 04:44:27,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:27,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633644556] [2019-11-24 04:44:27,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:27,923 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 04:44:27,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633644556] [2019-11-24 04:44:27,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:27,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:27,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754376455] [2019-11-24 04:44:27,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:44:27,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:44:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:44:27,927 INFO L87 Difference]: Start difference. First operand 7737 states and 14966 transitions. Second operand 4 states. [2019-11-24 04:44:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:28,375 INFO L93 Difference]: Finished difference Result 14470 states and 27900 transitions. [2019-11-24 04:44:28,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:44:28,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-24 04:44:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:28,401 INFO L225 Difference]: With dead ends: 14470 [2019-11-24 04:44:28,402 INFO L226 Difference]: Without dead ends: 7327 [2019-11-24 04:44:28,416 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 04:44:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2019-11-24 04:44:28,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 7147. [2019-11-24 04:44:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7147 states. [2019-11-24 04:44:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7147 states to 7147 states and 13817 transitions. [2019-11-24 04:44:28,762 INFO L78 Accepts]: Start accepts. Automaton has 7147 states and 13817 transitions. Word has length 32 [2019-11-24 04:44:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:28,763 INFO L462 AbstractCegarLoop]: Abstraction has 7147 states and 13817 transitions. [2019-11-24 04:44:28,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:44:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 7147 states and 13817 transitions. [2019-11-24 04:44:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-24 04:44:28,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:28,769 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, 1, 1] [2019-11-24 04:44:28,769 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:28,770 INFO L82 PathProgramCache]: Analyzing trace with hash 574562022, now seen corresponding path program 1 times [2019-11-24 04:44:28,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:28,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536760238] [2019-11-24 04:44:28,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:29,066 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 04:44:29,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536760238] [2019-11-24 04:44:29,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:29,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:44:29,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335386827] [2019-11-24 04:44:29,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:44:29,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:29,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:44:29,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:44:29,069 INFO L87 Difference]: Start difference. First operand 7147 states and 13817 transitions. Second operand 4 states. [2019-11-24 04:44:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:30,927 INFO L93 Difference]: Finished difference Result 14601 states and 28220 transitions. [2019-11-24 04:44:30,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:44:30,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-11-24 04:44:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:30,946 INFO L225 Difference]: With dead ends: 14601 [2019-11-24 04:44:30,946 INFO L226 Difference]: Without dead ends: 7908 [2019-11-24 04:44:30,957 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 04:44:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7908 states. [2019-11-24 04:44:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7908 to 7147. [2019-11-24 04:44:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7147 states. [2019-11-24 04:44:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7147 states to 7147 states and 13742 transitions. [2019-11-24 04:44:31,233 INFO L78 Accepts]: Start accepts. Automaton has 7147 states and 13742 transitions. Word has length 33 [2019-11-24 04:44:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:31,233 INFO L462 AbstractCegarLoop]: Abstraction has 7147 states and 13742 transitions. [2019-11-24 04:44:31,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:44:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 7147 states and 13742 transitions. [2019-11-24 04:44:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-24 04:44:31,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:31,241 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:31,241 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash 568910721, now seen corresponding path program 1 times [2019-11-24 04:44:31,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:31,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422040242] [2019-11-24 04:44:31,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:31,532 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 04:44:31,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422040242] [2019-11-24 04:44:31,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:31,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:31,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581575900] [2019-11-24 04:44:31,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:44:31,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:31,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:44:31,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:31,536 INFO L87 Difference]: Start difference. First operand 7147 states and 13742 transitions. Second operand 3 states. [2019-11-24 04:44:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:33,576 INFO L93 Difference]: Finished difference Result 19889 states and 38288 transitions. [2019-11-24 04:44:33,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:44:33,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-11-24 04:44:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:33,609 INFO L225 Difference]: With dead ends: 19889 [2019-11-24 04:44:33,610 INFO L226 Difference]: Without dead ends: 13217 [2019-11-24 04:44:33,622 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 04:44:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13217 states. [2019-11-24 04:44:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13217 to 7102. [2019-11-24 04:44:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7102 states. [2019-11-24 04:44:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7102 states to 7102 states and 13622 transitions. [2019-11-24 04:44:33,931 INFO L78 Accepts]: Start accepts. Automaton has 7102 states and 13622 transitions. Word has length 38 [2019-11-24 04:44:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:33,932 INFO L462 AbstractCegarLoop]: Abstraction has 7102 states and 13622 transitions. [2019-11-24 04:44:33,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:44:33,933 INFO L276 IsEmpty]: Start isEmpty. Operand 7102 states and 13622 transitions. [2019-11-24 04:44:33,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-24 04:44:33,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:33,938 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:33,938 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash -429737905, now seen corresponding path program 1 times [2019-11-24 04:44:33,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:33,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062473964] [2019-11-24 04:44:33,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:34,170 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 04:44:34,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062473964] [2019-11-24 04:44:34,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:34,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:34,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951122365] [2019-11-24 04:44:34,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:44:34,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:34,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:44:34,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:34,172 INFO L87 Difference]: Start difference. First operand 7102 states and 13622 transitions. Second operand 3 states. [2019-11-24 04:44:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:35,713 INFO L93 Difference]: Finished difference Result 19784 states and 38038 transitions. [2019-11-24 04:44:35,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:44:35,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-24 04:44:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:35,743 INFO L225 Difference]: With dead ends: 19784 [2019-11-24 04:44:35,743 INFO L226 Difference]: Without dead ends: 13184 [2019-11-24 04:44:35,756 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 04:44:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13184 states.