/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_spec14_product11.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:35:28,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:35:28,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:35:28,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:35:28,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:35:28,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:35:28,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:35:28,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:35:28,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:35:28,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:35:28,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:35:28,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:35:28,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:35:28,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:35:28,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:35:28,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:35:28,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:35:28,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:35:28,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:35:28,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:35:28,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:35:28,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:35:28,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:35:28,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:35:28,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:35:28,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:35:28,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:35:28,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:35:28,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:35:28,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:35:28,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:35:28,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:35:28,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:35:28,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:35:28,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:35:28,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:35:28,526 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 04:35:28,546 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:35:28,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:35:28,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:35:28,547 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:35:28,548 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:35:28,548 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:35:28,548 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:35:28,548 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:35:28,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:35:28,549 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:35:28,550 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:35:28,550 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:35:28,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:35:28,551 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:35:28,551 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:35:28,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:35:28,552 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:35:28,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:35:28,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:35:28,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:35:28,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:35:28,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:35:28,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:35:28,554 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:35:28,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:35:28,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:35:28,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:35:28,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:35:28,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:35:28,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:35:28,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:35:28,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:35:28,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:35:28,557 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:35:28,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:35:28,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:35:28,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:35:28,558 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:35:28,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:35:28,839 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:35:28,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:35:28,844 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:35:28,844 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:35:28,845 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product11.cil.c [2019-11-24 04:35:28,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3591133fe/e4d71e85a45944199e7fe477f30e2760/FLAG3219b8f1d [2019-11-24 04:35:29,519 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:35:29,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product11.cil.c [2019-11-24 04:35:29,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3591133fe/e4d71e85a45944199e7fe477f30e2760/FLAG3219b8f1d [2019-11-24 04:35:29,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3591133fe/e4d71e85a45944199e7fe477f30e2760 [2019-11-24 04:35:29,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:35:29,757 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:35:29,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:35:29,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:35:29,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:35:29,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:35:29" (1/1) ... [2019-11-24 04:35:29,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e9711f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:29, skipping insertion in model container [2019-11-24 04:35:29,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:35:29" (1/1) ... [2019-11-24 04:35:29,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:35:29,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:35:30,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:35:30,676 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:35:30,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:35:30,946 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:35:30,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30 WrapperNode [2019-11-24 04:35:30,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:35:30,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:35:30,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:35:30,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:35:30,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:30,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:31,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:35:31,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:35:31,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:35:31,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:35:31,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:31,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:31,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:31,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:31,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:31,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:31,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (1/1) ... [2019-11-24 04:35:31,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:35:31,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:35:31,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:35:31,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:35:31,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (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 04:35:31,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:35:31,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:35:31,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:35:31,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:36:37,450 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:36:37,450 INFO L284 CfgBuilder]: Removed 1263 assume(true) statements. [2019-11-24 04:36:37,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:36:37 BoogieIcfgContainer [2019-11-24 04:36:37,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:36:37,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:36:37,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:36:37,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:36:37,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:35:29" (1/3) ... [2019-11-24 04:36:37,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737c8302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:36:37, skipping insertion in model container [2019-11-24 04:36:37,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:35:30" (2/3) ... [2019-11-24 04:36:37,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737c8302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:36:37, skipping insertion in model container [2019-11-24 04:36:37,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:36:37" (3/3) ... [2019-11-24 04:36:37,460 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2019-11-24 04:36:37,468 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:36:37,478 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-24 04:36:37,487 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-24 04:36:37,527 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:36:37,528 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:36:37,528 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:36:37,528 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:36:37,528 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:36:37,528 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:36:37,529 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:36:37,529 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:36:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states. [2019-11-24 04:36:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:36:37,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:37,584 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:36:37,585 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 04:36:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:37,592 INFO L82 PathProgramCache]: Analyzing trace with hash 862885359, now seen corresponding path program 1 times [2019-11-24 04:36:37,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:37,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918250761] [2019-11-24 04:36:37,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:38,271 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 04:36:38,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918250761] [2019-11-24 04:36:38,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:38,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:36:38,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124176166] [2019-11-24 04:36:38,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:36:38,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:38,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:36:38,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:36:38,299 INFO L87 Difference]: Start difference. First operand 1783 states. Second operand 4 states. [2019-11-24 04:36:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:39,583 INFO L93 Difference]: Finished difference Result 4215 states and 8124 transitions. [2019-11-24 04:36:39,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:36:39,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-24 04:36:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:39,638 INFO L225 Difference]: With dead ends: 4215 [2019-11-24 04:36:39,638 INFO L226 Difference]: Without dead ends: 2712 [2019-11-24 04:36:39,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 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 04:36:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2019-11-24 04:36:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 1781. [2019-11-24 04:36:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1781 states. [2019-11-24 04:36:39,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 3425 transitions. [2019-11-24 04:36:39,831 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 3425 transitions. Word has length 11 [2019-11-24 04:36:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:39,832 INFO L462 AbstractCegarLoop]: Abstraction has 1781 states and 3425 transitions. [2019-11-24 04:36:39,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:36:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 3425 transitions. [2019-11-24 04:36:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 04:36:39,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:39,839 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:36:39,840 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 04:36:39,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:39,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2143190625, now seen corresponding path program 1 times [2019-11-24 04:36:39,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:39,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838419777] [2019-11-24 04:36:39,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:40,148 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 04:36:40,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838419777] [2019-11-24 04:36:40,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:40,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:36:40,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930106053] [2019-11-24 04:36:40,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:36:40,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:40,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:36:40,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:36:40,153 INFO L87 Difference]: Start difference. First operand 1781 states and 3425 transitions. Second operand 4 states. [2019-11-24 04:36:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:41,895 INFO L93 Difference]: Finished difference Result 5432 states and 10382 transitions. [2019-11-24 04:36:41,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:36:41,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-24 04:36:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:41,925 INFO L225 Difference]: With dead ends: 5432 [2019-11-24 04:36:41,926 INFO L226 Difference]: Without dead ends: 3881 [2019-11-24 04:36:41,932 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 04:36:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3881 states. [2019-11-24 04:36:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3881 to 2862. [2019-11-24 04:36:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2862 states. [2019-11-24 04:36:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 5401 transitions. [2019-11-24 04:36:42,481 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 5401 transitions. Word has length 14 [2019-11-24 04:36:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:42,482 INFO L462 AbstractCegarLoop]: Abstraction has 2862 states and 5401 transitions. [2019-11-24 04:36:42,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:36:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 5401 transitions. [2019-11-24 04:36:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 04:36:42,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:42,487 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:36:42,488 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 04:36:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash 713636538, now seen corresponding path program 1 times [2019-11-24 04:36:42,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:42,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131451791] [2019-11-24 04:36:42,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:42,619 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 04:36:42,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131451791] [2019-11-24 04:36:42,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:42,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:36:42,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969577007] [2019-11-24 04:36:42,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:36:42,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:36:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:36:42,622 INFO L87 Difference]: Start difference. First operand 2862 states and 5401 transitions. Second operand 5 states. [2019-11-24 04:36:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:43,164 INFO L93 Difference]: Finished difference Result 6727 states and 12654 transitions. [2019-11-24 04:36:43,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 04:36:43,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-24 04:36:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:43,207 INFO L225 Difference]: With dead ends: 6727 [2019-11-24 04:36:43,216 INFO L226 Difference]: Without dead ends: 5146 [2019-11-24 04:36:43,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-24 04:36:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5146 states. [2019-11-24 04:36:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5146 to 2857. [2019-11-24 04:36:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2857 states. [2019-11-24 04:36:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 5391 transitions. [2019-11-24 04:36:43,352 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 5391 transitions. Word has length 14 [2019-11-24 04:36:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:43,353 INFO L462 AbstractCegarLoop]: Abstraction has 2857 states and 5391 transitions. [2019-11-24 04:36:43,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:36:43,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 5391 transitions. [2019-11-24 04:36:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-24 04:36:43,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:43,356 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 04:36:43,356 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 04:36:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:43,356 INFO L82 PathProgramCache]: Analyzing trace with hash -959484380, now seen corresponding path program 1 times [2019-11-24 04:36:43,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:43,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965057082] [2019-11-24 04:36:43,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:43,599 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 04:36:43,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965057082] [2019-11-24 04:36:43,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:43,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:36:43,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049395798] [2019-11-24 04:36:43,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:36:43,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:36:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:36:43,604 INFO L87 Difference]: Start difference. First operand 2857 states and 5391 transitions. Second operand 5 states. [2019-11-24 04:36:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:44,432 INFO L93 Difference]: Finished difference Result 5439 states and 10254 transitions. [2019-11-24 04:36:44,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:36:44,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-24 04:36:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:44,462 INFO L225 Difference]: With dead ends: 5439 [2019-11-24 04:36:44,462 INFO L226 Difference]: Without dead ends: 5429 [2019-11-24 04:36:44,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:36:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5429 states. [2019-11-24 04:36:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5429 to 2873. [2019-11-24 04:36:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2873 states. [2019-11-24 04:36:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 5414 transitions. [2019-11-24 04:36:44,576 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 5414 transitions. Word has length 19 [2019-11-24 04:36:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:44,577 INFO L462 AbstractCegarLoop]: Abstraction has 2873 states and 5414 transitions. [2019-11-24 04:36:44,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:36:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 5414 transitions. [2019-11-24 04:36:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-24 04:36:44,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:44,579 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:36:44,579 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 04:36:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1153474081, now seen corresponding path program 1 times [2019-11-24 04:36:44,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:44,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411895137] [2019-11-24 04:36:44,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:44,759 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 04:36:44,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411895137] [2019-11-24 04:36:44,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:44,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:36:44,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251403040] [2019-11-24 04:36:44,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:36:44,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:36:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:36:44,762 INFO L87 Difference]: Start difference. First operand 2873 states and 5414 transitions. Second operand 4 states. [2019-11-24 04:36:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:36:47,184 INFO L93 Difference]: Finished difference Result 5948 states and 11163 transitions. [2019-11-24 04:36:47,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:36:47,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-11-24 04:36:47,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:36:47,201 INFO L225 Difference]: With dead ends: 5948 [2019-11-24 04:36:47,202 INFO L226 Difference]: Without dead ends: 3410 [2019-11-24 04:36:47,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:36:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2019-11-24 04:36:47,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2873. [2019-11-24 04:36:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2873 states. [2019-11-24 04:36:47,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 5189 transitions. [2019-11-24 04:36:47,309 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 5189 transitions. Word has length 26 [2019-11-24 04:36:47,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:36:47,310 INFO L462 AbstractCegarLoop]: Abstraction has 2873 states and 5189 transitions. [2019-11-24 04:36:47,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:36:47,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 5189 transitions. [2019-11-24 04:36:47,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-24 04:36:47,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:36:47,312 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 04:36:47,312 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 04:36:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:36:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash 763140292, now seen corresponding path program 1 times [2019-11-24 04:36:47,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:36:47,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606574963] [2019-11-24 04:36:47,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:36:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:36:47,871 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 04:36:47,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606574963] [2019-11-24 04:36:47,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:36:47,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:36:47,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987856816] [2019-11-24 04:36:47,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:36:47,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:36:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:36:47,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:36:47,874 INFO L87 Difference]: Start difference. First operand 2873 states and 5189 transitions. Second operand 3 states.