/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_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:11:33,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:11:33,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:11:33,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:11:33,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:11:33,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:11:33,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:11:33,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:11:33,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:11:33,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:11:33,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:11:33,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:11:33,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:11:33,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:11:33,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:11:33,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:11:33,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:11:33,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:11:33,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:11:33,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:11:33,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:11:33,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:11:33,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:11:33,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:11:33,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:11:33,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:11:33,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:11:33,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:11:33,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:11:33,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:11:33,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:11:33,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:11:33,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:11:33,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:11:33,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:11:33,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:11:33,582 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 05:11:33,606 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:11:33,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:11:33,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:11:33,608 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:11:33,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:11:33,609 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:11:33,609 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:11:33,609 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:11:33,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:11:33,609 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:11:33,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:11:33,611 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:11:33,611 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:11:33,611 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:11:33,612 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:11:33,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:11:33,613 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:11:33,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:11:33,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:11:33,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:11:33,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:11:33,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:11:33,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:11:33,615 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:11:33,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:11:33,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:11:33,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:11:33,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:11:33,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:11:33,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:11:33,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:11:33,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:11:33,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:11:33,618 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:11:33,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:11:33,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:11:33,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:11:33,619 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:11:33,898 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:11:33,915 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:11:33,919 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:11:33,921 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:11:33,921 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:11:33,922 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec8_product26.cil.c [2019-11-24 05:11:33,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ee3bdc71/a5204636c41c41f49a906c24e8e1863d/FLAGfad03c15a [2019-11-24 05:11:34,616 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:11:34,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec8_product26.cil.c [2019-11-24 05:11:34,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ee3bdc71/a5204636c41c41f49a906c24e8e1863d/FLAGfad03c15a [2019-11-24 05:11:34,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ee3bdc71/a5204636c41c41f49a906c24e8e1863d [2019-11-24 05:11:34,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:11:34,829 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:11:34,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:11:34,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:11:34,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:11:34,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:11:34" (1/1) ... [2019-11-24 05:11:34,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eaa97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:34, skipping insertion in model container [2019-11-24 05:11:34,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:11:34" (1/1) ... [2019-11-24 05:11:34,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:11:34,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:11:35,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:11:35,701 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:11:35,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:11:36,019 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:11:36,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36 WrapperNode [2019-11-24 05:11:36,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:11:36,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:11:36,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:11:36,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:11:36,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (1/1) ... [2019-11-24 05:11:36,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (1/1) ... [2019-11-24 05:11:36,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:11:36,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:11:36,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:11:36,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:11:36,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (1/1) ... [2019-11-24 05:11:36,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (1/1) ... [2019-11-24 05:11:36,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (1/1) ... [2019-11-24 05:11:36,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (1/1) ... [2019-11-24 05:11:36,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (1/1) ... [2019-11-24 05:11:36,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (1/1) ... [2019-11-24 05:11:36,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (1/1) ... [2019-11-24 05:11:36,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:11:36,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:11:36,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:11:36,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:11:36,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (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 05:11:36,602 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:11:36,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:11:36,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:11:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:11:36,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:11:54,143 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:11:54,144 INFO L284 CfgBuilder]: Removed 725 assume(true) statements. [2019-11-24 05:11:54,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:11:54 BoogieIcfgContainer [2019-11-24 05:11:54,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:11:54,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:11:54,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:11:54,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:11:54,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:11:34" (1/3) ... [2019-11-24 05:11:54,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708d38ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:11:54, skipping insertion in model container [2019-11-24 05:11:54,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:36" (2/3) ... [2019-11-24 05:11:54,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708d38ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:11:54, skipping insertion in model container [2019-11-24 05:11:54,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:11:54" (3/3) ... [2019-11-24 05:11:54,153 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec8_product26.cil.c [2019-11-24 05:11:54,163 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:11:54,171 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-24 05:11:54,179 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-24 05:11:54,204 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:11:54,204 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:11:54,204 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:11:54,204 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:11:54,205 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:11:54,205 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:11:54,205 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:11:54,205 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:11:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2019-11-24 05:11:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:11:54,229 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:54,230 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:54,230 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -493737343, now seen corresponding path program 1 times [2019-11-24 05:11:54,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:54,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374378905] [2019-11-24 05:11:54,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:54,618 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 05:11:54,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374378905] [2019-11-24 05:11:54,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:54,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:11:54,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703839852] [2019-11-24 05:11:54,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:11:54,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:54,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:11:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:11:54,643 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2019-11-24 05:11:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:54,669 INFO L93 Difference]: Finished difference Result 100 states and 153 transitions. [2019-11-24 05:11:54,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:11:54,671 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-24 05:11:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:54,683 INFO L225 Difference]: With dead ends: 100 [2019-11-24 05:11:54,684 INFO L226 Difference]: Without dead ends: 59 [2019-11-24 05:11:54,687 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 05:11:54,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-24 05:11:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-24 05:11:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-24 05:11:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 86 transitions. [2019-11-24 05:11:54,731 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 86 transitions. Word has length 8 [2019-11-24 05:11:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:54,732 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 86 transitions. [2019-11-24 05:11:54,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:11:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 86 transitions. [2019-11-24 05:11:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:11:54,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:54,733 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:54,734 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:54,734 INFO L82 PathProgramCache]: Analyzing trace with hash 93255164, now seen corresponding path program 1 times [2019-11-24 05:11:54,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:54,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152031329] [2019-11-24 05:11:54,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:54,861 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 05:11:54,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152031329] [2019-11-24 05:11:54,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:54,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:54,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788630780] [2019-11-24 05:11:54,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:54,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:54,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:54,865 INFO L87 Difference]: Start difference. First operand 59 states and 86 transitions. Second operand 3 states. [2019-11-24 05:11:54,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:54,885 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2019-11-24 05:11:54,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:54,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-24 05:11:54,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:54,887 INFO L225 Difference]: With dead ends: 94 [2019-11-24 05:11:54,888 INFO L226 Difference]: Without dead ends: 61 [2019-11-24 05:11:54,889 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 05:11:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-24 05:11:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-24 05:11:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-24 05:11:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2019-11-24 05:11:54,899 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 9 [2019-11-24 05:11:54,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:54,899 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2019-11-24 05:11:54,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2019-11-24 05:11:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 05:11:54,900 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:54,900 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:54,901 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash -912268473, now seen corresponding path program 1 times [2019-11-24 05:11:54,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:54,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546521985] [2019-11-24 05:11:54,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:55,092 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 05:11:55,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546521985] [2019-11-24 05:11:55,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:55,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:11:55,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767116710] [2019-11-24 05:11:55,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:55,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:55,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:55,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:55,095 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand 3 states. [2019-11-24 05:11:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:55,226 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2019-11-24 05:11:55,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:55,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 05:11:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:55,228 INFO L225 Difference]: With dead ends: 86 [2019-11-24 05:11:55,228 INFO L226 Difference]: Without dead ends: 57 [2019-11-24 05:11:55,229 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 05:11:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-24 05:11:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-11-24 05:11:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-24 05:11:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 80 transitions. [2019-11-24 05:11:55,236 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 80 transitions. Word has length 13 [2019-11-24 05:11:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:55,237 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 80 transitions. [2019-11-24 05:11:55,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 80 transitions. [2019-11-24 05:11:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:11:55,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:55,238 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:55,238 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:55,239 INFO L82 PathProgramCache]: Analyzing trace with hash 215279012, now seen corresponding path program 1 times [2019-11-24 05:11:55,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:55,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247676480] [2019-11-24 05:11:55,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:55,420 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 05:11:55,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247676480] [2019-11-24 05:11:55,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:55,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 05:11:55,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960841313] [2019-11-24 05:11:55,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 05:11:55,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:55,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 05:11:55,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:11:55,423 INFO L87 Difference]: Start difference. First operand 55 states and 80 transitions. Second operand 5 states. [2019-11-24 05:11:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:55,738 INFO L93 Difference]: Finished difference Result 124 states and 174 transitions. [2019-11-24 05:11:55,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:11:55,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-24 05:11:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:55,754 INFO L225 Difference]: With dead ends: 124 [2019-11-24 05:11:55,754 INFO L226 Difference]: Without dead ends: 101 [2019-11-24 05:11:55,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:11:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-24 05:11:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2019-11-24 05:11:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-24 05:11:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 129 transitions. [2019-11-24 05:11:55,765 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 129 transitions. Word has length 15 [2019-11-24 05:11:55,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:55,766 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 129 transitions. [2019-11-24 05:11:55,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 05:11:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 129 transitions. [2019-11-24 05:11:55,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 05:11:55,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:55,767 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:55,767 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash 98330946, now seen corresponding path program 1 times [2019-11-24 05:11:55,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:55,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017335814] [2019-11-24 05:11:55,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:56,139 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 05:11:56,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017335814] [2019-11-24 05:11:56,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783133323] [2019-11-24 05:11:56,140 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 05:11:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:56,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:11:56,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:11:56,753 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 05:11:56,754 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:11:56,789 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 05:11:56,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401156239] [2019-11-24 05:11:56,818 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-24 05:11:56,819 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:11:56,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:11:56,834 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:11:56,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:13:15,047 WARN L192 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 724