/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_spec9_product15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:14:22,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:14:22,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:14:22,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:14:22,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:14:22,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:14:22,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:14:22,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:14:22,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:14:22,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:14:22,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:14:22,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:14:22,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:14:22,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:14:22,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:14:22,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:14:22,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:14:22,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:14:22,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:14:22,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:14:22,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:14:22,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:14:22,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:14:22,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:14:22,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 05:14:22,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 05:14:22,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 05:14:22,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 05:14:22,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 05:14:22,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 05:14:22,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:14:22,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:14:22,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:14:22,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:14:22,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:14:22,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:14:22,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:14:22,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:14:22,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:14:22,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:14:22,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:14:22,581 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 05:14:22,613 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:14:22,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:14:22,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:14:22,618 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:14:22,618 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:14:22,619 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:14:22,619 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:14:22,619 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:14:22,619 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:14:22,619 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:14:22,619 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:14:22,621 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:14:22,621 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:14:22,621 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:14:22,621 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:14:22,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:14:22,622 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:14:22,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:14:22,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:14:22,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:14:22,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:14:22,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:14:22,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:14:22,624 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:14:22,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:14:22,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:14:22,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:14:22,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:14:22,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:14:22,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:14:22,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:14:22,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:14:22,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:14:22,627 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:14:22,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:14:22,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:14:22,628 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:14:22,628 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:14:22,926 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:14:22,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:14:22,942 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:14:22,944 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:14:22,944 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:14:22,945 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec9_product15.cil.c [2019-11-24 05:14:23,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceb06989b/15e5d98d3a76433faadce6972699e9d8/FLAG18c2d9c18 [2019-11-24 05:14:23,647 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:14:23,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec9_product15.cil.c [2019-11-24 05:14:23,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceb06989b/15e5d98d3a76433faadce6972699e9d8/FLAG18c2d9c18 [2019-11-24 05:14:23,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceb06989b/15e5d98d3a76433faadce6972699e9d8 [2019-11-24 05:14:23,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:14:23,852 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:14:23,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:14:23,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:14:23,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:14:23,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:14:23" (1/1) ... [2019-11-24 05:14:23,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d9ee48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:23, skipping insertion in model container [2019-11-24 05:14:23,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:14:23" (1/1) ... [2019-11-24 05:14:23,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:14:23,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:14:24,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:14:24,688 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:14:24,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:14:24,942 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:14:24,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24 WrapperNode [2019-11-24 05:14:24,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:14:24,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:14:24,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:14:24,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:14:24,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (1/1) ... [2019-11-24 05:14:24,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (1/1) ... [2019-11-24 05:14:25,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:14:25,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:14:25,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:14:25,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:14:25,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (1/1) ... [2019-11-24 05:14:25,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (1/1) ... [2019-11-24 05:14:25,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (1/1) ... [2019-11-24 05:14:25,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (1/1) ... [2019-11-24 05:14:25,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (1/1) ... [2019-11-24 05:14:25,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (1/1) ... [2019-11-24 05:14:25,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (1/1) ... [2019-11-24 05:14:25,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:14:25,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:14:25,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:14:25,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:14:25,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (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 05:14:25,306 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:14:25,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:14:25,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:14:25,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:14:25,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:14:31,398 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:14:31,398 INFO L284 CfgBuilder]: Removed 259 assume(true) statements. [2019-11-24 05:14:31,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:14:31 BoogieIcfgContainer [2019-11-24 05:14:31,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:14:31,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:14:31,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:14:31,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:14:31,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:14:23" (1/3) ... [2019-11-24 05:14:31,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c6c15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:14:31, skipping insertion in model container [2019-11-24 05:14:31,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:14:24" (2/3) ... [2019-11-24 05:14:31,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c6c15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:14:31, skipping insertion in model container [2019-11-24 05:14:31,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:14:31" (3/3) ... [2019-11-24 05:14:31,411 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec9_product15.cil.c [2019-11-24 05:14:31,421 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:14:31,429 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:14:31,440 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:14:31,463 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:14:31,463 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:14:31,463 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:14:31,463 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:14:31,463 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:14:31,463 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:14:31,464 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:14:31,464 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:14:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:14:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:14:31,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:31,485 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:31,486 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash 413175570, now seen corresponding path program 1 times [2019-11-24 05:14:31,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:31,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440371452] [2019-11-24 05:14:31,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:31,901 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 05:14:31,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440371452] [2019-11-24 05:14:31,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:31,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:14:31,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007490709] [2019-11-24 05:14:31,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:14:31,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:31,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:14:31,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:14:31,926 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:14:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:31,949 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:14:31,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:14:31,950 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:14:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:31,962 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:14:31,962 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:14:31,966 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 05:14:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:14:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:14:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:14:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:14:32,003 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:14:32,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:32,003 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:14:32,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:14:32,003 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:14:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:14:32,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:32,004 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:32,004 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:32,005 INFO L82 PathProgramCache]: Analyzing trace with hash 215805133, now seen corresponding path program 1 times [2019-11-24 05:14:32,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:32,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357636250] [2019-11-24 05:14:32,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:32,192 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 05:14:32,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357636250] [2019-11-24 05:14:32,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:32,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:14:32,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117054716] [2019-11-24 05:14:32,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:32,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:32,201 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:14:32,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:32,227 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:14:32,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:32,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:14:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:32,230 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:14:32,230 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:14:32,232 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 05:14:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:14:32,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:14:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:14:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:14:32,245 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:14:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:32,246 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:14:32,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:14:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:14:32,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:32,249 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:32,250 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:32,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:32,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1698713359, now seen corresponding path program 1 times [2019-11-24 05:14:32,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:32,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84781412] [2019-11-24 05:14:32,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:32,392 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 05:14:32,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84781412] [2019-11-24 05:14:32,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:32,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:14:32,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117357372] [2019-11-24 05:14:32,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:32,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:32,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:32,395 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 05:14:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:32,418 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 05:14:32,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:32,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 05:14:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:32,421 INFO L225 Difference]: With dead ends: 45 [2019-11-24 05:14:32,421 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 05:14:32,421 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 05:14:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 05:14:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 05:14:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 05:14:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 05:14:32,428 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 05:14:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:32,429 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 05:14:32,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 05:14:32,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:14:32,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:32,430 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:32,430 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:32,431 INFO L82 PathProgramCache]: Analyzing trace with hash -953819074, now seen corresponding path program 1 times [2019-11-24 05:14:32,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:32,431 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589349482] [2019-11-24 05:14:32,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:32,724 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 05:14:32,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589349482] [2019-11-24 05:14:32,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:32,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:14:32,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336906932] [2019-11-24 05:14:32,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:14:32,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:32,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:14:32,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:14:32,729 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states. [2019-11-24 05:14:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:33,057 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 05:14:33,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:14:33,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:14:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:33,059 INFO L225 Difference]: With dead ends: 68 [2019-11-24 05:14:33,060 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 05:14:33,060 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 05:14:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 05:14:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 05:14:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 05:14:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 05:14:33,070 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 05:14:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:33,070 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 05:14:33,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:14:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 05:14:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:14:33,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:33,071 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:33,072 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1761511589, now seen corresponding path program 1 times [2019-11-24 05:14:33,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:33,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921470432] [2019-11-24 05:14:33,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:33,130 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 05:14:33,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921470432] [2019-11-24 05:14:33,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:33,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:14:33,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115745105] [2019-11-24 05:14:33,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:14:33,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:33,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:14:33,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:14:33,132 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 05:14:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:33,160 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 05:14:33,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:14:33,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 05:14:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:33,162 INFO L225 Difference]: With dead ends: 168 [2019-11-24 05:14:33,162 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 05:14:33,163 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 05:14:33,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 05:14:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 05:14:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 05:14:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 05:14:33,178 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 16 [2019-11-24 05:14:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:33,179 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 05:14:33,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:14:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 05:14:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:14:33,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:33,180 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:33,181 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1236135592, now seen corresponding path program 1 times [2019-11-24 05:14:33,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:33,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582743806] [2019-11-24 05:14:33,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:33,733 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 05:14:33,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582743806] [2019-11-24 05:14:33,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:14:33,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-24 05:14:33,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947145381] [2019-11-24 05:14:33,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-24 05:14:33,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:14:33,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-24 05:14:33,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-24 05:14:33,737 INFO L87 Difference]: Start difference. First operand 104 states and 185 transitions. Second operand 9 states. [2019-11-24 05:14:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:14:34,708 INFO L93 Difference]: Finished difference Result 305 states and 549 transitions. [2019-11-24 05:14:34,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 05:14:34,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-11-24 05:14:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:14:34,712 INFO L225 Difference]: With dead ends: 305 [2019-11-24 05:14:34,712 INFO L226 Difference]: Without dead ends: 297 [2019-11-24 05:14:34,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-24 05:14:34,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-11-24 05:14:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 150. [2019-11-24 05:14:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-24 05:14:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 269 transitions. [2019-11-24 05:14:34,757 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 269 transitions. Word has length 17 [2019-11-24 05:14:34,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:14:34,757 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 269 transitions. [2019-11-24 05:14:34,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-24 05:14:34,758 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 269 transitions. [2019-11-24 05:14:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 05:14:34,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:14:34,761 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:14:34,761 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:14:34,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:14:34,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1635768191, now seen corresponding path program 1 times [2019-11-24 05:14:34,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:14:34,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139605171] [2019-11-24 05:14:34,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:14:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:14:34,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139605171] [2019-11-24 05:14:34,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459806906] [2019-11-24 05:14:34,954 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 05:14:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:14:35,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 05:14:35,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:14:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:14:35,326 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:14:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:14:35,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [391129242] [2019-11-24 05:14:35,401 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 05:14:35,402 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:14:35,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:14:35,415 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:14:35,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:15:25,086 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 690 [2019-11-24 05:15:28,884 WARN L192 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 281 DAG size of output: 229 [2019-11-24 05:15:29,240 WARN L192 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 722 [2019-11-24 05:15:31,026 WARN L192 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 1373 DAG size of output: 1359 [2019-11-24 05:15:32,061 WARN L192 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1373 DAG size of output: 1359 [2019-11-24 05:15:33,054 WARN L192 SmtUtils]: Spent 988.00 ms on a formula simplification that was a NOOP. DAG size: 1358 [2019-11-24 05:15:33,077 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7