/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_spec8_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:11:29,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:11:29,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:11:29,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:11:29,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:11:29,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:11:29,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:11:29,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:11:29,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:11:29,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:11:29,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:11:29,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:11:29,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:11:29,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:11:29,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:11:29,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:11:29,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:11:29,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:11:29,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:11:29,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:11:29,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:11:29,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:11:29,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:11:29,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:11:29,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 05:11:29,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 05:11:29,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 05:11:29,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 05:11:29,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 05:11:29,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 05:11:29,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:11:29,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:11:29,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:11:29,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:11:29,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:11:29,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:11:29,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:11:29,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:11:29,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:11:29,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:11:29,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:11:29,545 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 05:11:29,561 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:11:29,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:11:29,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:11:29,562 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:11:29,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:11:29,563 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:11:29,563 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:11:29,563 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:11:29,563 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:11:29,563 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:11:29,564 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:11:29,564 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:11:29,564 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:11:29,564 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:11:29,564 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:11:29,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:11:29,565 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:11:29,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:11:29,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:11:29,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:11:29,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:11:29,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:11:29,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:11:29,567 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:11:29,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:11:29,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:11:29,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:11:29,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:11:29,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:11:29,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:11:29,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:11:29,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:11:29,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:11:29,569 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:11:29,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:11:29,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:11:29,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:11:29,570 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:11:29,843 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:11:29,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:11:29,863 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:11:29,864 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:11:29,865 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:11:29,866 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec8_product22.cil.c [2019-11-24 05:11:29,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9779a5349/3761df276a87435d9b4d262406f2303e/FLAG6b73b0d58 [2019-11-24 05:11:30,559 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:11:30,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec8_product22.cil.c [2019-11-24 05:11:30,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9779a5349/3761df276a87435d9b4d262406f2303e/FLAG6b73b0d58 [2019-11-24 05:11:30,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9779a5349/3761df276a87435d9b4d262406f2303e [2019-11-24 05:11:30,792 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:11:30,794 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:11:30,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:11:30,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:11:30,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:11:30,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:11:30" (1/1) ... [2019-11-24 05:11:30,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce8710b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:30, skipping insertion in model container [2019-11-24 05:11:30,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:11:30" (1/1) ... [2019-11-24 05:11:30,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:11:30,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:11:31,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:11:31,643 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:11:31,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:11:31,890 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:11:31,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31 WrapperNode [2019-11-24 05:11:31,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:11:31,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:11:31,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:11:31,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:11:31,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (1/1) ... [2019-11-24 05:11:31,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (1/1) ... [2019-11-24 05:11:32,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:11:32,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:11:32,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:11:32,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:11:32,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (1/1) ... [2019-11-24 05:11:32,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (1/1) ... [2019-11-24 05:11:32,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (1/1) ... [2019-11-24 05:11:32,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (1/1) ... [2019-11-24 05:11:32,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (1/1) ... [2019-11-24 05:11:32,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (1/1) ... [2019-11-24 05:11:32,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (1/1) ... [2019-11-24 05:11:32,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:11:32,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:11:32,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:11:32,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:11:32,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (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 05:11:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:11:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:11:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:11:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:11:32,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:11:39,638 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:11:39,639 INFO L284 CfgBuilder]: Removed 323 assume(true) statements. [2019-11-24 05:11:39,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:11:39 BoogieIcfgContainer [2019-11-24 05:11:39,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:11:39,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:11:39,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:11:39,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:11:39,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:11:30" (1/3) ... [2019-11-24 05:11:39,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e93ffe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:11:39, skipping insertion in model container [2019-11-24 05:11:39,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:31" (2/3) ... [2019-11-24 05:11:39,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e93ffe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:11:39, skipping insertion in model container [2019-11-24 05:11:39,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:11:39" (3/3) ... [2019-11-24 05:11:39,656 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec8_product22.cil.c [2019-11-24 05:11:39,664 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:11:39,672 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:11:39,681 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:11:39,702 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:11:39,702 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:11:39,702 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:11:39,702 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:11:39,703 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:11:39,703 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:11:39,703 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:11:39,703 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:11:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:11:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:11:39,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:39,724 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:39,724 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2145254035, now seen corresponding path program 1 times [2019-11-24 05:11:39,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:39,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723659837] [2019-11-24 05:11:39,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:40,091 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 05:11:40,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723659837] [2019-11-24 05:11:40,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:40,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:11:40,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025278158] [2019-11-24 05:11:40,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:11:40,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:11:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:11:40,117 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:11:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:40,145 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:11:40,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:11:40,147 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:11:40,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:40,161 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:11:40,161 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:11:40,166 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 05:11:40,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:11:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:11:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:11:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:11:40,210 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:11:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:40,211 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:11:40,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:11:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:11:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:11:40,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:40,212 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:40,212 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:40,213 INFO L82 PathProgramCache]: Analyzing trace with hash -482636323, now seen corresponding path program 1 times [2019-11-24 05:11:40,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:40,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857370056] [2019-11-24 05:11:40,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:40,318 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 05:11:40,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857370056] [2019-11-24 05:11:40,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:40,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:40,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265675855] [2019-11-24 05:11:40,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:40,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:40,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:40,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:40,322 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:11:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:40,351 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:11:40,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:40,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:11:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:40,353 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:11:40,353 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:11:40,354 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 05:11:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:11:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:11:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:11:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:11:40,366 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:11:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:40,368 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:11:40,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:11:40,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:11:40,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:40,369 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:40,369 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:40,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:40,371 INFO L82 PathProgramCache]: Analyzing trace with hash 113999929, now seen corresponding path program 1 times [2019-11-24 05:11:40,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:40,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579133575] [2019-11-24 05:11:40,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:40,565 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 05:11:40,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579133575] [2019-11-24 05:11:40,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:40,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:11:40,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992448415] [2019-11-24 05:11:40,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:40,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:40,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:40,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:40,569 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 05:11:40,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:40,612 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 05:11:40,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:40,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 05:11:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:40,617 INFO L225 Difference]: With dead ends: 45 [2019-11-24 05:11:40,617 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 05:11:40,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 05:11:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 05:11:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 05:11:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 05:11:40,635 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 05:11:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:40,635 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 05:11:40,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 05:11:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:11:40,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:40,638 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:40,638 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash -888028186, now seen corresponding path program 1 times [2019-11-24 05:11:40,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:40,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963990989] [2019-11-24 05:11:40,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:41,055 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 05:11:41,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963990989] [2019-11-24 05:11:41,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:41,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:11:41,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091187694] [2019-11-24 05:11:41,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:11:41,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:41,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:11:41,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:11:41,058 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states. [2019-11-24 05:11:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:41,371 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 05:11:41,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:11:41,374 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:11:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:41,375 INFO L225 Difference]: With dead ends: 68 [2019-11-24 05:11:41,375 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 05:11:41,376 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-24 05:11:41,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 05:11:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 05:11:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 05:11:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 05:11:41,394 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 05:11:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:41,394 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 05:11:41,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:11:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 05:11:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:11:41,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:41,398 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:41,398 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:41,399 INFO L82 PathProgramCache]: Analyzing trace with hash 286736854, now seen corresponding path program 1 times [2019-11-24 05:11:41,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:41,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738391561] [2019-11-24 05:11:41,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:41,465 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 05:11:41,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738391561] [2019-11-24 05:11:41,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:41,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:41,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481990653] [2019-11-24 05:11:41,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:41,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:41,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:41,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:41,468 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 05:11:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:41,506 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 05:11:41,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:41,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 05:11:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:41,511 INFO L225 Difference]: With dead ends: 168 [2019-11-24 05:11:41,512 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 05:11:41,512 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 05:11:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 05:11:41,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 05:11:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 05:11:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 05:11:41,543 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 16 [2019-11-24 05:11:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:41,547 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 05:11:41,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 05:11:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:11:41,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:41,549 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:41,549 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:41,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1053141511, now seen corresponding path program 1 times [2019-11-24 05:11:41,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:41,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298269112] [2019-11-24 05:11:41,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:41,802 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 05:11:41,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298269112] [2019-11-24 05:11:41,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495773559] [2019-11-24 05:11:41,803 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 05:11:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:42,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:11:42,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:11:42,293 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 05:11:42,295 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:11:42,322 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 05:11:42,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104407417] [2019-11-24 05:11:42,355 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 05:11:42,355 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:11:42,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:11:42,368 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:11:42,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:12:43,179 WARN L192 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 701 [2019-11-24 05:12:47,439 WARN L192 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 301 DAG size of output: 245 [2019-11-24 05:12:47,911 WARN L192 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 738 [2019-11-24 05:12:50,042 WARN L192 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 1161