/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_spec4_product33.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:04:32,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:04:32,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:04:32,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:04:32,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:04:32,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:04:32,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:04:32,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:04:32,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:04:32,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:04:32,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:04:32,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:04:32,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:04:32,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:04:32,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:04:32,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:04:32,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:04:32,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:04:32,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:04:32,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:04:32,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:04:32,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:04:32,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:04:32,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:04:32,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:04:32,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:04:32,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:04:32,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:04:32,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:04:32,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:04:32,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:04:32,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:04:32,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:04:32,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:04:32,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:04:32,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:04:32,716 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 05:04:32,738 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:04:32,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:04:32,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:04:32,740 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:04:32,740 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:04:32,740 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:04:32,740 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:04:32,741 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:04:32,741 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:04:32,741 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:04:32,742 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:04:32,742 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:04:32,743 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:04:32,743 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:04:32,743 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:04:32,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:04:32,745 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:04:32,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:04:32,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:04:32,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:04:32,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:04:32,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:04:32,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:04:32,746 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:04:32,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:04:32,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:04:32,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:04:32,747 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:04:32,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:04:32,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:04:32,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:04:32,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:04:32,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:04:32,750 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:04:32,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:04:32,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:04:32,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:04:32,751 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:04:33,040 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:04:33,057 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:04:33,060 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:04:33,061 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:04:33,062 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:04:33,062 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec4_product33.cil.c [2019-11-24 05:04:33,134 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c46f5e9/36eb9e0d81d54bf4b1fba5c5083168eb/FLAG049eefad4 [2019-11-24 05:04:33,720 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:04:33,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec4_product33.cil.c [2019-11-24 05:04:33,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c46f5e9/36eb9e0d81d54bf4b1fba5c5083168eb/FLAG049eefad4 [2019-11-24 05:04:34,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5c46f5e9/36eb9e0d81d54bf4b1fba5c5083168eb [2019-11-24 05:04:34,009 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:04:34,011 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:04:34,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:04:34,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:04:34,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:04:34,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:04:34" (1/1) ... [2019-11-24 05:04:34,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75752ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:34, skipping insertion in model container [2019-11-24 05:04:34,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:04:34" (1/1) ... [2019-11-24 05:04:34,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:04:34,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:04:34,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:04:34,846 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:04:35,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:04:35,179 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:04:35,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35 WrapperNode [2019-11-24 05:04:35,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:04:35,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:04:35,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:04:35,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:04:35,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (1/1) ... [2019-11-24 05:04:35,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (1/1) ... [2019-11-24 05:04:35,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:04:35,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:04:35,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:04:35,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:04:35,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (1/1) ... [2019-11-24 05:04:35,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (1/1) ... [2019-11-24 05:04:35,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (1/1) ... [2019-11-24 05:04:35,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (1/1) ... [2019-11-24 05:04:35,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (1/1) ... [2019-11-24 05:04:35,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (1/1) ... [2019-11-24 05:04:35,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (1/1) ... [2019-11-24 05:04:35,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:04:35,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:04:35,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:04:35,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:04:35,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (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 05:04:35,633 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:04:35,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:04:35,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:04:35,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:04:35,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:04:45,544 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:04:45,544 INFO L284 CfgBuilder]: Removed 403 assume(true) statements. [2019-11-24 05:04:45,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:04:45 BoogieIcfgContainer [2019-11-24 05:04:45,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:04:45,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:04:45,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:04:45,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:04:45,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:04:34" (1/3) ... [2019-11-24 05:04:45,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cf86c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:04:45, skipping insertion in model container [2019-11-24 05:04:45,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:35" (2/3) ... [2019-11-24 05:04:45,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cf86c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:04:45, skipping insertion in model container [2019-11-24 05:04:45,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:04:45" (3/3) ... [2019-11-24 05:04:45,554 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec4_product33.cil.c [2019-11-24 05:04:45,564 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:04:45,571 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:04:45,581 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:04:45,604 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:04:45,605 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:04:45,605 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:04:45,605 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:04:45,605 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:04:45,605 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:04:45,606 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:04:45,606 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:04:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:04:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:04:45,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:45,626 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:45,627 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash 514922084, now seen corresponding path program 1 times [2019-11-24 05:04:45,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:45,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202231946] [2019-11-24 05:04:45,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:46,002 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 05:04:46,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202231946] [2019-11-24 05:04:46,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:46,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:04:46,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964217954] [2019-11-24 05:04:46,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:04:46,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:46,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:04:46,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:04:46,024 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:04:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:46,047 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:04:46,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:04:46,048 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:04:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:46,060 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:04:46,060 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:04:46,064 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 05:04:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:04:46,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:04:46,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:04:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:04:46,105 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:04:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:46,105 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:04:46,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:04:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:04:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:04:46,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:46,106 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:46,107 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:46,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1851907453, now seen corresponding path program 1 times [2019-11-24 05:04:46,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:46,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763487733] [2019-11-24 05:04:46,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:46,245 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 05:04:46,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763487733] [2019-11-24 05:04:46,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:46,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:04:46,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858051771] [2019-11-24 05:04:46,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:04:46,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:46,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:04:46,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:04:46,249 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:04:46,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:46,264 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:04:46,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:04:46,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:04:46,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:46,266 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:04:46,266 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:04:46,267 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 05:04:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:04:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:04:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:04:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:04:46,280 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:04:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:46,281 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:04:46,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:04:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:04:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:04:46,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:46,284 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:46,285 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:46,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1276677886, now seen corresponding path program 1 times [2019-11-24 05:04:46,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:46,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900485316] [2019-11-24 05:04:46,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:46,700 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 05:04:46,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900485316] [2019-11-24 05:04:46,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:46,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:04:46,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818766635] [2019-11-24 05:04:46,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 05:04:46,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:46,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 05:04:46,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:04:46,702 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 5 states. [2019-11-24 05:04:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:47,184 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2019-11-24 05:04:47,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 05:04:47,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-24 05:04:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:47,186 INFO L225 Difference]: With dead ends: 76 [2019-11-24 05:04:47,186 INFO L226 Difference]: Without dead ends: 74 [2019-11-24 05:04:47,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 05:04:47,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-24 05:04:47,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2019-11-24 05:04:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-24 05:04:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 113 transitions. [2019-11-24 05:04:47,199 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 113 transitions. Word has length 12 [2019-11-24 05:04:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:47,200 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 113 transitions. [2019-11-24 05:04:47,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 05:04:47,200 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 113 transitions. [2019-11-24 05:04:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 05:04:47,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:47,201 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:47,202 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:47,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:47,202 INFO L82 PathProgramCache]: Analyzing trace with hash 806804454, now seen corresponding path program 1 times [2019-11-24 05:04:47,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:47,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465945271] [2019-11-24 05:04:47,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:47,266 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 05:04:47,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465945271] [2019-11-24 05:04:47,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:47,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:04:47,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250723991] [2019-11-24 05:04:47,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:04:47,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:47,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:04:47,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:04:47,270 INFO L87 Difference]: Start difference. First operand 66 states and 113 transitions. Second operand 3 states. [2019-11-24 05:04:47,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:47,301 INFO L93 Difference]: Finished difference Result 188 states and 327 transitions. [2019-11-24 05:04:47,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:04:47,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-24 05:04:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:47,304 INFO L225 Difference]: With dead ends: 188 [2019-11-24 05:04:47,304 INFO L226 Difference]: Without dead ends: 126 [2019-11-24 05:04:47,305 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 05:04:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-24 05:04:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2019-11-24 05:04:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-24 05:04:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 201 transitions. [2019-11-24 05:04:47,322 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 201 transitions. Word has length 14 [2019-11-24 05:04:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:47,322 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 201 transitions. [2019-11-24 05:04:47,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:04:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 201 transitions. [2019-11-24 05:04:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:04:47,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:47,324 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:47,324 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2083579151, now seen corresponding path program 1 times [2019-11-24 05:04:47,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:47,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059753727] [2019-11-24 05:04:47,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:47,726 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 05:04:47,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059753727] [2019-11-24 05:04:47,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:47,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:04:47,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91582830] [2019-11-24 05:04:47,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:04:47,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:47,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:04:47,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:04:47,729 INFO L87 Difference]: Start difference. First operand 112 states and 201 transitions. Second operand 6 states. [2019-11-24 05:04:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:48,144 INFO L93 Difference]: Finished difference Result 274 states and 497 transitions. [2019-11-24 05:04:48,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 05:04:48,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:04:48,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:48,148 INFO L225 Difference]: With dead ends: 274 [2019-11-24 05:04:48,149 INFO L226 Difference]: Without dead ends: 268 [2019-11-24 05:04:48,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-24 05:04:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-11-24 05:04:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 210. [2019-11-24 05:04:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-11-24 05:04:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 387 transitions. [2019-11-24 05:04:48,192 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 387 transitions. Word has length 15 [2019-11-24 05:04:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:48,193 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 387 transitions. [2019-11-24 05:04:48,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:04:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 387 transitions. [2019-11-24 05:04:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:04:48,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:48,197 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:48,198 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:48,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1282527301, now seen corresponding path program 1 times [2019-11-24 05:04:48,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:48,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623088669] [2019-11-24 05:04:48,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:48,282 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 05:04:48,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623088669] [2019-11-24 05:04:48,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:48,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:04:48,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731781715] [2019-11-24 05:04:48,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:04:48,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:48,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:04:48,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:04:48,285 INFO L87 Difference]: Start difference. First operand 210 states and 387 transitions. Second operand 3 states. [2019-11-24 05:04:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:48,321 INFO L93 Difference]: Finished difference Result 614 states and 1137 transitions. [2019-11-24 05:04:48,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:04:48,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 05:04:48,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:48,325 INFO L225 Difference]: With dead ends: 614 [2019-11-24 05:04:48,325 INFO L226 Difference]: Without dead ends: 408 [2019-11-24 05:04:48,330 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 05:04:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2019-11-24 05:04:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 390. [2019-11-24 05:04:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2019-11-24 05:04:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 727 transitions. [2019-11-24 05:04:48,391 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 727 transitions. Word has length 15 [2019-11-24 05:04:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:48,391 INFO L462 AbstractCegarLoop]: Abstraction has 390 states and 727 transitions. [2019-11-24 05:04:48,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:04:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 727 transitions. [2019-11-24 05:04:48,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:04:48,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:48,398 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:48,399 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash -398431939, now seen corresponding path program 1 times [2019-11-24 05:04:48,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:48,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349231512] [2019-11-24 05:04:48,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:48,997 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 05:04:49,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349231512] [2019-11-24 05:04:49,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:49,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-24 05:04:49,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706904598] [2019-11-24 05:04:49,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-24 05:04:49,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:49,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-24 05:04:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-24 05:04:49,002 INFO L87 Difference]: Start difference. First operand 390 states and 727 transitions. Second operand 9 states. [2019-11-24 05:04:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:50,028 INFO L93 Difference]: Finished difference Result 490 states and 910 transitions. [2019-11-24 05:04:50,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 05:04:50,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-24 05:04:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:50,032 INFO L225 Difference]: With dead ends: 490 [2019-11-24 05:04:50,032 INFO L226 Difference]: Without dead ends: 481 [2019-11-24 05:04:50,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-24 05:04:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2019-11-24 05:04:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 386. [2019-11-24 05:04:50,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2019-11-24 05:04:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 711 transitions. [2019-11-24 05:04:50,068 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 711 transitions. Word has length 16 [2019-11-24 05:04:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:50,069 INFO L462 AbstractCegarLoop]: Abstraction has 386 states and 711 transitions. [2019-11-24 05:04:50,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-24 05:04:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 711 transitions. [2019-11-24 05:04:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:04:50,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:50,071 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:50,071 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:50,071 INFO L82 PathProgramCache]: Analyzing trace with hash -842838956, now seen corresponding path program 1 times [2019-11-24 05:04:50,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:50,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178442458] [2019-11-24 05:04:50,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:50,260 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 05:04:50,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178442458] [2019-11-24 05:04:50,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780066745] [2019-11-24 05:04:50,261 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 05:04:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:50,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:04:50,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:04:50,682 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 05:04:50,683 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:04:50,709 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 05:04:50,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471983047] [2019-11-24 05:04:50,737 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-24 05:04:50,737 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:04:50,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:04:50,751 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:04:50,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:05:47,322 WARN L192 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 698 [2019-11-24 05:05:51,498 WARN L192 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 316 DAG size of output: 257 [2019-11-24 05:05:51,915 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 739 [2019-11-24 05:05:54,980 WARN L192 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 1338