/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/email_spec1_product15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:53:16,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:53:16,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:53:16,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:53:16,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:53:16,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:53:16,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:53:16,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:53:16,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:53:16,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:53:16,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:53:16,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:53:16,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:53:16,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:53:16,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:53:16,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:53:16,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:53:16,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:53:16,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:53:16,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:53:16,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:53:16,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:53:16,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:53:16,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:53:16,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:53:16,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:53:16,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:53:16,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:53:16,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:53:16,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:53:16,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:53:16,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:53:16,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:53:16,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:53:16,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:53:16,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:53:16,614 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 04:53:16,644 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:53:16,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:53:16,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:53:16,645 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:53:16,645 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:53:16,645 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:53:16,646 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:53:16,647 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:53:16,647 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:53:16,647 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:53:16,647 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:53:16,647 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:53:16,648 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:53:16,648 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:53:16,648 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:53:16,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:53:16,650 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:53:16,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:53:16,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:53:16,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:53:16,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:53:16,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:53:16,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:53:16,651 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:53:16,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:53:16,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:53:16,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:53:16,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:53:16,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:53:16,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:53:16,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:53:16,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:53:16,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:53:16,655 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:53:16,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:53:16,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:53:16,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:53:16,656 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:53:16,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:53:16,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:53:16,994 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:53:16,996 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:53:16,996 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:53:16,997 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec1_product15.cil.c [2019-11-24 04:53:17,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e774441/2e85575f515c469aa624ab484ba2d56b/FLAGd8a6ceff3 [2019-11-24 04:53:17,634 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:53:17,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec1_product15.cil.c [2019-11-24 04:53:17,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e774441/2e85575f515c469aa624ab484ba2d56b/FLAGd8a6ceff3 [2019-11-24 04:53:17,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e774441/2e85575f515c469aa624ab484ba2d56b [2019-11-24 04:53:17,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:53:17,882 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:53:17,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:53:17,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:53:17,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:53:17,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:53:17" (1/1) ... [2019-11-24 04:53:17,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b0091e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:17, skipping insertion in model container [2019-11-24 04:53:17,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:53:17" (1/1) ... [2019-11-24 04:53:17,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:53:17,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:53:18,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:53:18,747 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:53:18,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:53:19,029 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:53:19,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19 WrapperNode [2019-11-24 04:53:19,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:53:19,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:53:19,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:53:19,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:53:19,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (1/1) ... [2019-11-24 04:53:19,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (1/1) ... [2019-11-24 04:53:19,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:53:19,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:53:19,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:53:19,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:53:19,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (1/1) ... [2019-11-24 04:53:19,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (1/1) ... [2019-11-24 04:53:19,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (1/1) ... [2019-11-24 04:53:19,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (1/1) ... [2019-11-24 04:53:19,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (1/1) ... [2019-11-24 04:53:19,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (1/1) ... [2019-11-24 04:53:19,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (1/1) ... [2019-11-24 04:53:19,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:53:19,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:53:19,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:53:19,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:53:19,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (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 04:53:19,324 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 04:53:19,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:53:19,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:53:19,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:53:19,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:53:25,369 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:53:25,370 INFO L284 CfgBuilder]: Removed 255 assume(true) statements. [2019-11-24 04:53:25,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:53:25 BoogieIcfgContainer [2019-11-24 04:53:25,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:53:25,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:53:25,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:53:25,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:53:25,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:53:17" (1/3) ... [2019-11-24 04:53:25,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1761db8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:53:25, skipping insertion in model container [2019-11-24 04:53:25,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19" (2/3) ... [2019-11-24 04:53:25,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1761db8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:53:25, skipping insertion in model container [2019-11-24 04:53:25,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:53:25" (3/3) ... [2019-11-24 04:53:25,380 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec1_product15.cil.c [2019-11-24 04:53:25,390 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:53:25,398 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:53:25,409 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:53:25,434 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:53:25,435 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:53:25,435 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:53:25,435 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:53:25,435 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:53:25,435 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:53:25,435 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:53:25,436 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:53:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 04:53:25,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:53:25,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:53:25,459 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:53:25,460 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:53:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:53:25,466 INFO L82 PathProgramCache]: Analyzing trace with hash -257663763, now seen corresponding path program 1 times [2019-11-24 04:53:25,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:53:25,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022784821] [2019-11-24 04:53:25,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:53:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:53:25,847 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 04:53:25,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022784821] [2019-11-24 04:53:25,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:53:25,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:53:25,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153867582] [2019-11-24 04:53:25,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:53:25,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:53:25,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:53:25,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:53:25,869 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 04:53:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:53:25,888 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 04:53:25,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:53:25,890 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 04:53:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:53:25,902 INFO L225 Difference]: With dead ends: 54 [2019-11-24 04:53:25,902 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 04:53:25,905 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 04:53:25,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 04:53:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 04:53:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 04:53:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 04:53:25,948 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 04:53:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:53:25,948 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 04:53:25,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:53:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 04:53:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:53:25,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:53:25,950 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:53:25,950 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:53:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:53:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash -335075968, now seen corresponding path program 1 times [2019-11-24 04:53:25,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:53:25,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331501902] [2019-11-24 04:53:25,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:53:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:53:26,047 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 04:53:26,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331501902] [2019-11-24 04:53:26,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:53:26,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:53:26,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664441696] [2019-11-24 04:53:26,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:53:26,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:53:26,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:53:26,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:53:26,051 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 04:53:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:53:26,065 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 04:53:26,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:53:26,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:53:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:53:26,067 INFO L225 Difference]: With dead ends: 50 [2019-11-24 04:53:26,067 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 04:53:26,068 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 04:53:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 04:53:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 04:53:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 04:53:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 04:53:26,081 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 04:53:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:53:26,081 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 04:53:26,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:53:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 04:53:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:53:26,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:53:26,084 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:53:26,084 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:53:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:53:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash 150294884, now seen corresponding path program 1 times [2019-11-24 04:53:26,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:53:26,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299675520] [2019-11-24 04:53:26,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:53:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:53:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:53:26,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299675520] [2019-11-24 04:53:26,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:53:26,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:53:26,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754259564] [2019-11-24 04:53:26,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:53:26,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:53:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:53:26,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:53:26,275 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 04:53:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:53:26,300 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 04:53:26,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:53:26,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 04:53:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:53:26,302 INFO L225 Difference]: With dead ends: 45 [2019-11-24 04:53:26,304 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 04:53:26,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:53:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 04:53:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 04:53:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 04:53:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 04:53:26,318 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 04:53:26,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:53:26,318 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 04:53:26,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:53:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 04:53:26,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:53:26,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:53:26,321 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:53:26,321 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:53:26,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:53:26,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1208228989, now seen corresponding path program 1 times [2019-11-24 04:53:26,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:53:26,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290971581] [2019-11-24 04:53:26,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:53:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:53:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:53:26,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290971581] [2019-11-24 04:53:26,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:53:26,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:53:26,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188653297] [2019-11-24 04:53:26,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:53:26,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:53:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:53:26,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:53:26,670 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states. [2019-11-24 04:53:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:53:26,890 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 04:53:26,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:53:26,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 04:53:26,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:53:26,893 INFO L225 Difference]: With dead ends: 68 [2019-11-24 04:53:26,893 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 04:53:26,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:53:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 04:53:26,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 04:53:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 04:53:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 04:53:26,903 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 04:53:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:53:26,904 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 04:53:26,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:53:26,904 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 04:53:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:53:26,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:53:26,905 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:53:26,905 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:53:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:53:26,906 INFO L82 PathProgramCache]: Analyzing trace with hash 633896078, now seen corresponding path program 1 times [2019-11-24 04:53:26,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:53:26,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918848918] [2019-11-24 04:53:26,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:53:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:53:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:53:26,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918848918] [2019-11-24 04:53:26,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:53:26,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:53:26,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526095525] [2019-11-24 04:53:26,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:53:26,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:53:26,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:53:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:53:26,976 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 04:53:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:53:27,020 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 04:53:27,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:53:27,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 04:53:27,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:53:27,026 INFO L225 Difference]: With dead ends: 168 [2019-11-24 04:53:27,027 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 04:53:27,028 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 04:53:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 04:53:27,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 04:53:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 04:53:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 04:53:27,056 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 16 [2019-11-24 04:53:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:53:27,057 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 04:53:27,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:53:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 04:53:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:53:27,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:53:27,058 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:53:27,059 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:53:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:53:27,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1359677319, now seen corresponding path program 1 times [2019-11-24 04:53:27,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:53:27,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747616329] [2019-11-24 04:53:27,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:53:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:53:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:53:27,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747616329] [2019-11-24 04:53:27,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215836190] [2019-11-24 04:53:27,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:53:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:53:27,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:53:27,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:53:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:53:27,670 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:53:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:53:27,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749021713] [2019-11-24 04:53:27,724 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 04:53:27,725 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:53:27,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:53:27,738 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:53:27,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:53:53,812 WARN L192 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 657 [2019-11-24 04:53:56,756 WARN L192 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 207 [2019-11-24 04:53:57,095 WARN L192 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 686 [2019-11-24 04:54:00,114 WARN L192 SmtUtils]: Spent 2.78 s on a formula simplification that was a NOOP. DAG size: 1065 [2019-11-24 04:54:42,307 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 15104 conjuctions. This might take some time...