/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_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:03:52,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:03:52,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:03:52,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:03:52,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:03:52,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:03:52,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:03:52,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:03:52,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:03:52,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:03:52,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:03:52,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:03:52,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:03:52,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:03:52,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:03:52,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:03:52,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:03:52,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:03:52,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:03:52,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:03:52,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:03:52,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:03:52,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:03:52,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:03:52,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:03:52,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:03:52,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:03:52,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:03:52,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:03:52,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:03:52,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:03:52,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:03:52,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:03:52,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:03:52,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:03:52,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:03:52,313 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 05:03:52,328 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:03:52,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:03:52,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:03:52,329 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:03:52,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:03:52,330 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:03:52,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:03:52,330 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:03:52,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:03:52,331 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:03:52,331 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:03:52,331 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:03:52,331 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:03:52,331 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:03:52,332 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:03:52,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:03:52,332 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:03:52,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:03:52,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:03:52,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:03:52,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:03:52,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:03:52,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:03:52,335 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:03:52,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:03:52,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:03:52,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:03:52,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:03:52,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:03:52,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:03:52,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:03:52,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:03:52,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:03:52,337 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:03:52,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:03:52,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:03:52,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:03:52,338 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:03:52,616 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:03:52,633 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:03:52,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:03:52,638 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:03:52,639 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:03:52,639 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec4_product29.cil.c [2019-11-24 05:03:52,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf5662ac/5b80a2b5e8dc4361beeeab2c9156f071/FLAG3e85fba28 [2019-11-24 05:03:53,351 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:03:53,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec4_product29.cil.c [2019-11-24 05:03:53,373 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf5662ac/5b80a2b5e8dc4361beeeab2c9156f071/FLAG3e85fba28 [2019-11-24 05:03:53,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaf5662ac/5b80a2b5e8dc4361beeeab2c9156f071 [2019-11-24 05:03:53,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:03:53,567 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:03:53,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:03:53,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:03:53,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:03:53,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:03:53" (1/1) ... [2019-11-24 05:03:53,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22286c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:53, skipping insertion in model container [2019-11-24 05:03:53,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:03:53" (1/1) ... [2019-11-24 05:03:53,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:03:53,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:03:54,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:03:54,346 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:03:54,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:03:54,630 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:03:54,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54 WrapperNode [2019-11-24 05:03:54,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:03:54,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:03:54,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:03:54,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:03:54,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (1/1) ... [2019-11-24 05:03:54,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (1/1) ... [2019-11-24 05:03:54,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:03:54,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:03:54,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:03:54,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:03:54,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (1/1) ... [2019-11-24 05:03:54,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (1/1) ... [2019-11-24 05:03:54,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (1/1) ... [2019-11-24 05:03:54,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (1/1) ... [2019-11-24 05:03:55,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (1/1) ... [2019-11-24 05:03:55,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (1/1) ... [2019-11-24 05:03:55,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (1/1) ... [2019-11-24 05:03:55,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:03:55,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:03:55,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:03:55,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:03:55,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (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 05:03:55,152 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:03:55,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:03:55,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:03:55,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:03:55,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:04:10,916 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:04:10,916 INFO L284 CfgBuilder]: Removed 605 assume(true) statements. [2019-11-24 05:04:10,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:04:10 BoogieIcfgContainer [2019-11-24 05:04:10,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:04:10,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:04:10,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:04:10,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:04:10,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:03:53" (1/3) ... [2019-11-24 05:04:10,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db16523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:04:10, skipping insertion in model container [2019-11-24 05:04:10,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:03:54" (2/3) ... [2019-11-24 05:04:10,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db16523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:04:10, skipping insertion in model container [2019-11-24 05:04:10,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:04:10" (3/3) ... [2019-11-24 05:04:10,926 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec4_product29.cil.c [2019-11-24 05:04:10,935 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:04:10,942 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-24 05:04:10,951 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-24 05:04:10,972 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:04:10,972 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:04:10,972 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:04:10,972 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:04:10,972 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:04:10,973 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:04:10,973 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:04:10,973 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:04:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2019-11-24 05:04:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:04:10,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:10,995 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:10,996 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2041365053, now seen corresponding path program 1 times [2019-11-24 05:04:11,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:11,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647306842] [2019-11-24 05:04:11,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:11,449 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 05:04:11,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647306842] [2019-11-24 05:04:11,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:11,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:04:11,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824826473] [2019-11-24 05:04:11,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:04:11,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:11,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:04:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:04:11,475 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2019-11-24 05:04:11,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:11,511 INFO L93 Difference]: Finished difference Result 100 states and 153 transitions. [2019-11-24 05:04:11,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:04:11,513 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-24 05:04:11,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:11,525 INFO L225 Difference]: With dead ends: 100 [2019-11-24 05:04:11,525 INFO L226 Difference]: Without dead ends: 59 [2019-11-24 05:04:11,529 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 05:04:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-24 05:04:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-24 05:04:11,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-24 05:04:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 86 transitions. [2019-11-24 05:04:11,571 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 86 transitions. Word has length 8 [2019-11-24 05:04:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:11,572 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 86 transitions. [2019-11-24 05:04:11,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:04:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 86 transitions. [2019-11-24 05:04:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:04:11,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:11,573 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:11,573 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:11,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:11,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1048468705, now seen corresponding path program 1 times [2019-11-24 05:04:11,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:11,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331124845] [2019-11-24 05:04:11,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:11,746 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 05:04:11,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331124845] [2019-11-24 05:04:11,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:11,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:04:11,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40458164] [2019-11-24 05:04:11,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:04:11,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:11,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:04:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:04:11,752 INFO L87 Difference]: Start difference. First operand 59 states and 86 transitions. Second operand 3 states. [2019-11-24 05:04:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:11,777 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2019-11-24 05:04:11,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:04:11,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-24 05:04:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:11,779 INFO L225 Difference]: With dead ends: 94 [2019-11-24 05:04:11,779 INFO L226 Difference]: Without dead ends: 61 [2019-11-24 05:04:11,780 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 05:04:11,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-24 05:04:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-24 05:04:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-24 05:04:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2019-11-24 05:04:11,790 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 9 [2019-11-24 05:04:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:11,790 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2019-11-24 05:04:11,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:04:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2019-11-24 05:04:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 05:04:11,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:11,792 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:11,792 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:11,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1466699909, now seen corresponding path program 1 times [2019-11-24 05:04:11,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:11,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857723475] [2019-11-24 05:04:11,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:12,046 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 05:04:12,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857723475] [2019-11-24 05:04:12,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:12,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 05:04:12,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981782610] [2019-11-24 05:04:12,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 05:04:12,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:12,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 05:04:12,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:04:12,048 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand 5 states. [2019-11-24 05:04:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:12,290 INFO L93 Difference]: Finished difference Result 136 states and 190 transitions. [2019-11-24 05:04:12,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:04:12,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-24 05:04:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:12,293 INFO L225 Difference]: With dead ends: 136 [2019-11-24 05:04:12,293 INFO L226 Difference]: Without dead ends: 110 [2019-11-24 05:04:12,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:04:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-24 05:04:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2019-11-24 05:04:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-24 05:04:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 137 transitions. [2019-11-24 05:04:12,310 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 137 transitions. Word has length 13 [2019-11-24 05:04:12,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:12,310 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 137 transitions. [2019-11-24 05:04:12,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 05:04:12,310 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 137 transitions. [2019-11-24 05:04:12,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 05:04:12,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:12,311 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:12,312 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:12,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1469407847, now seen corresponding path program 1 times [2019-11-24 05:04:12,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:12,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118190346] [2019-11-24 05:04:12,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:12,547 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 05:04:12,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118190346] [2019-11-24 05:04:12,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:12,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 05:04:12,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836368217] [2019-11-24 05:04:12,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:04:12,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:12,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:04:12,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:04:12,553 INFO L87 Difference]: Start difference. First operand 87 states and 137 transitions. Second operand 6 states. [2019-11-24 05:04:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:13,837 INFO L93 Difference]: Finished difference Result 176 states and 277 transitions. [2019-11-24 05:04:13,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 05:04:13,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-24 05:04:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:13,839 INFO L225 Difference]: With dead ends: 176 [2019-11-24 05:04:13,840 INFO L226 Difference]: Without dead ends: 170 [2019-11-24 05:04:13,840 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-24 05:04:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-24 05:04:13,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 146. [2019-11-24 05:04:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-24 05:04:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 246 transitions. [2019-11-24 05:04:13,862 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 246 transitions. Word has length 13 [2019-11-24 05:04:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:13,863 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 246 transitions. [2019-11-24 05:04:13,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:04:13,863 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 246 transitions. [2019-11-24 05:04:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:04:13,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:13,869 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:13,869 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash 607385054, now seen corresponding path program 1 times [2019-11-24 05:04:13,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:13,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986180069] [2019-11-24 05:04:13,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:13,936 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 05:04:13,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986180069] [2019-11-24 05:04:13,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:13,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:04:13,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908707425] [2019-11-24 05:04:13,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:04:13,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:04:13,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:04:13,939 INFO L87 Difference]: Start difference. First operand 146 states and 246 transitions. Second operand 3 states. [2019-11-24 05:04:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:13,964 INFO L93 Difference]: Finished difference Result 426 states and 722 transitions. [2019-11-24 05:04:13,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:04:13,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 05:04:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:13,967 INFO L225 Difference]: With dead ends: 426 [2019-11-24 05:04:13,967 INFO L226 Difference]: Without dead ends: 284 [2019-11-24 05:04:13,969 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 05:04:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-11-24 05:04:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 238. [2019-11-24 05:04:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-11-24 05:04:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 422 transitions. [2019-11-24 05:04:13,992 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 422 transitions. Word has length 15 [2019-11-24 05:04:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:13,992 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 422 transitions. [2019-11-24 05:04:13,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:04:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 422 transitions. [2019-11-24 05:04:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:04:13,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:13,994 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:13,994 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:13,995 INFO L82 PathProgramCache]: Analyzing trace with hash -93699757, now seen corresponding path program 1 times [2019-11-24 05:04:13,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:13,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477259638] [2019-11-24 05:04:13,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:14,057 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 05:04:14,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477259638] [2019-11-24 05:04:14,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:04:14,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:04:14,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575271462] [2019-11-24 05:04:14,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:04:14,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:04:14,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:04:14,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:04:14,059 INFO L87 Difference]: Start difference. First operand 238 states and 422 transitions. Second operand 3 states. [2019-11-24 05:04:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:04:14,086 INFO L93 Difference]: Finished difference Result 698 states and 1242 transitions. [2019-11-24 05:04:14,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:04:14,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 05:04:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:04:14,089 INFO L225 Difference]: With dead ends: 698 [2019-11-24 05:04:14,090 INFO L226 Difference]: Without dead ends: 464 [2019-11-24 05:04:14,091 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 05:04:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-11-24 05:04:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 418. [2019-11-24 05:04:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2019-11-24 05:04:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 762 transitions. [2019-11-24 05:04:14,120 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 762 transitions. Word has length 16 [2019-11-24 05:04:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:04:14,120 INFO L462 AbstractCegarLoop]: Abstraction has 418 states and 762 transitions. [2019-11-24 05:04:14,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:04:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 762 transitions. [2019-11-24 05:04:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:04:14,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:04:14,122 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:04:14,122 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:04:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:04:14,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1803933584, now seen corresponding path program 1 times [2019-11-24 05:04:14,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:04:14,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872456599] [2019-11-24 05:04:14,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:04:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:14,325 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 05:04:14,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872456599] [2019-11-24 05:04:14,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253262757] [2019-11-24 05:04:14,326 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 05:04:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:04:14,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:04:14,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:04:14,764 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 05:04:14,765 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:04:14,798 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 05:04:14,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130378542] [2019-11-24 05:04:14,827 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 05:04:14,828 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:04:14,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:04:14,846 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:04:14,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:05:13,102 WARN L192 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 702 [2019-11-24 05:05:17,445 WARN L192 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 321 DAG size of output: 261 [2019-11-24 05:05:17,869 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 745 [2019-11-24 05:05:20,808 WARN L192 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 1348