/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/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:27:03,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:27:03,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:27:03,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:27:03,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:27:03,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:27:03,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:27:03,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:27:03,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:27:03,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:27:03,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:27:03,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:27:03,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:27:03,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:27:03,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:27:03,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:27:03,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:27:03,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:27:03,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:27:03,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:27:03,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:27:03,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:27:03,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:27:03,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:27:03,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:27:03,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:27:03,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:27:03,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:27:03,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:27:03,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:27:03,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:27:03,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:27:03,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:27:03,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:27:03,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:27:03,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:27:03,609 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 04:27:03,630 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:27:03,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:27:03,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:27:03,632 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:27:03,632 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:27:03,632 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:27:03,632 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:27:03,632 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:27:03,632 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:27:03,633 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:27:03,634 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:27:03,634 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:27:03,634 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:27:03,635 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:27:03,635 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:27:03,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:27:03,636 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:27:03,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:27:03,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:27:03,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:27:03,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:27:03,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:27:03,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:27:03,638 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:27:03,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:27:03,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:27:03,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:27:03,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:27:03,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:27:03,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:27:03,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:27:03,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:27:03,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:27:03,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:27:03,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:27:03,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:27:03,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:27:03,642 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:27:03,928 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:27:03,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:27:03,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:27:03,950 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:27:03,950 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:27:03,951 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2019-11-24 04:27:04,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/633995ac0/59244f3e038942d2b81b4c4ea5edad76/FLAG05e98082c [2019-11-24 04:27:04,464 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:27:04,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2019-11-24 04:27:04,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/633995ac0/59244f3e038942d2b81b4c4ea5edad76/FLAG05e98082c [2019-11-24 04:27:04,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/633995ac0/59244f3e038942d2b81b4c4ea5edad76 [2019-11-24 04:27:04,883 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:27:04,886 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:27:04,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:27:04,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:27:04,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:27:04,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:27:04" (1/1) ... [2019-11-24 04:27:04,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a32c64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:04, skipping insertion in model container [2019-11-24 04:27:04,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:27:04" (1/1) ... [2019-11-24 04:27:04,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:27:04,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:27:05,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:27:05,159 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:27:05,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:27:05,206 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:27:05,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05 WrapperNode [2019-11-24 04:27:05,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:27:05,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:27:05,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:27:05,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:27:05,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (1/1) ... [2019-11-24 04:27:05,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (1/1) ... [2019-11-24 04:27:05,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:27:05,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:27:05,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:27:05,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:27:05,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (1/1) ... [2019-11-24 04:27:05,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (1/1) ... [2019-11-24 04:27:05,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (1/1) ... [2019-11-24 04:27:05,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (1/1) ... [2019-11-24 04:27:05,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (1/1) ... [2019-11-24 04:27:05,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (1/1) ... [2019-11-24 04:27:05,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (1/1) ... [2019-11-24 04:27:05,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:27:05,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:27:05,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:27:05,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:27:05,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (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 04:27:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:27:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:27:05,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:27:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:27:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:27:05,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:27:05,854 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:27:05,854 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-24 04:27:05,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:27:05 BoogieIcfgContainer [2019-11-24 04:27:05,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:27:05,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:27:05,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:27:05,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:27:05,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:27:04" (1/3) ... [2019-11-24 04:27:05,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac6f5bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:27:05, skipping insertion in model container [2019-11-24 04:27:05,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:27:05" (2/3) ... [2019-11-24 04:27:05,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac6f5bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:27:05, skipping insertion in model container [2019-11-24 04:27:05,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:27:05" (3/3) ... [2019-11-24 04:27:05,863 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2019-11-24 04:27:05,873 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:27:05,880 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:27:05,891 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:27:05,916 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:27:05,917 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:27:05,917 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:27:05,917 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:27:05,917 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:27:05,917 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:27:05,918 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:27:05,918 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:27:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-24 04:27:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:27:05,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:05,939 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:27:05,939 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash -731561975, now seen corresponding path program 1 times [2019-11-24 04:27:05,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:05,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413100324] [2019-11-24 04:27:05,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:06,100 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 04:27:06,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413100324] [2019-11-24 04:27:06,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:27:06,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:27:06,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719107003] [2019-11-24 04:27:06,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:27:06,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:27:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:27:06,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:27:06,126 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-11-24 04:27:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:27:06,186 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2019-11-24 04:27:06,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:27:06,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 04:27:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:27:06,197 INFO L225 Difference]: With dead ends: 43 [2019-11-24 04:27:06,197 INFO L226 Difference]: Without dead ends: 21 [2019-11-24 04:27:06,201 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 04:27:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-24 04:27:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2019-11-24 04:27:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-24 04:27:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-24 04:27:06,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2019-11-24 04:27:06,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:27:06,249 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-24 04:27:06,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:27:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-24 04:27:06,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:27:06,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:06,250 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:27:06,250 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:06,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:06,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1445692596, now seen corresponding path program 1 times [2019-11-24 04:27:06,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:06,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472555259] [2019-11-24 04:27:06,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:27:06,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472555259] [2019-11-24 04:27:06,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69634225] [2019-11-24 04:27:06,332 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 04:27:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:06,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:27:06,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:27:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:27:06,432 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:27:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:27:06,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417001235] [2019-11-24 04:27:06,481 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-24 04:27:06,481 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:27:06,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:27:06,494 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:27:06,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:27:08,694 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2019-11-24 04:27:09,929 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:27:10,689 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2019-11-24 04:27:10,923 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2019-11-24 04:27:11,086 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-11-24 04:27:11,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:27:11,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 17 [2019-11-24 04:27:11,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999613766] [2019-11-24 04:27:11,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-24 04:27:11,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:27:11,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-24 04:27:11,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-24 04:27:11,091 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 13 states. [2019-11-24 04:27:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:27:11,259 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2019-11-24 04:27:11,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-24 04:27:11,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-24 04:27:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:27:11,261 INFO L225 Difference]: With dead ends: 33 [2019-11-24 04:27:11,261 INFO L226 Difference]: Without dead ends: 26 [2019-11-24 04:27:11,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-24 04:27:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-24 04:27:11,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2019-11-24 04:27:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-24 04:27:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-11-24 04:27:11,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2019-11-24 04:27:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:27:11,268 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-11-24 04:27:11,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-24 04:27:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-11-24 04:27:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 04:27:11,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:11,269 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 04:27:11,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:11,472 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash -681055375, now seen corresponding path program 1 times [2019-11-24 04:27:11,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:11,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885641744] [2019-11-24 04:27:11,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:27:11,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885641744] [2019-11-24 04:27:11,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240580498] [2019-11-24 04:27:11,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:11,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:27:11,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:27:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:27:11,621 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:27:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:27:11,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662344524] [2019-11-24 04:27:11,655 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-24 04:27:11,655 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:27:11,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:27:11,656 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:27:11,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:27:13,038 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:14,807 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:27:15,039 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2019-11-24 04:27:15,193 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 36 [2019-11-24 04:27:16,160 WARN L192 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2019-11-24 04:27:16,690 WARN L192 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2019-11-24 04:27:17,209 WARN L192 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2019-11-24 04:27:17,731 WARN L192 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2019-11-24 04:27:17,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:27:17,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [3, 3, 3] total 18 [2019-11-24 04:27:17,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153020078] [2019-11-24 04:27:17,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-24 04:27:17,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:27:17,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-24 04:27:17,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-11-24 04:27:17,814 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 14 states. [2019-11-24 04:27:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:27:18,026 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-24 04:27:18,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-24 04:27:18,026 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-11-24 04:27:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:27:18,027 INFO L225 Difference]: With dead ends: 32 [2019-11-24 04:27:18,027 INFO L226 Difference]: Without dead ends: 20 [2019-11-24 04:27:18,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-11-24 04:27:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-24 04:27:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-24 04:27:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 04:27:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-24 04:27:18,032 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 18 [2019-11-24 04:27:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:27:18,032 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-24 04:27:18,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-24 04:27:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-24 04:27:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 04:27:18,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:18,033 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 04:27:18,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:18,237 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:18,237 INFO L82 PathProgramCache]: Analyzing trace with hash 31959175, now seen corresponding path program 1 times [2019-11-24 04:27:18,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:18,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227644878] [2019-11-24 04:27:18,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:27:18,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227644878] [2019-11-24 04:27:18,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871749216] [2019-11-24 04:27:18,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:18,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:27:18,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:27:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:27:18,325 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:27:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 04:27:18,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555377874] [2019-11-24 04:27:18,338 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-24 04:27:18,338 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:27:18,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:27:18,338 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:27:18,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:27:20,593 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:20,638 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:20,906 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:21,995 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2019-11-24 04:27:22,282 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2019-11-24 04:27:22,466 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 263 [2019-11-24 04:27:22,723 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2019-11-24 04:27:23,038 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 322 [2019-11-24 04:27:23,407 WARN L192 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 391 [2019-11-24 04:27:23,897 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 391 [2019-11-24 04:27:24,543 WARN L192 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 488 [2019-11-24 04:27:25,376 WARN L192 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 466 [2019-11-24 04:27:26,164 WARN L192 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 459 [2019-11-24 04:27:26,815 WARN L192 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 460 [2019-11-24 04:27:27,840 WARN L192 SmtUtils]: Spent 997.00 ms on a formula simplification that was a NOOP. DAG size: 564 [2019-11-24 04:27:28,995 WARN L192 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 565 DAG size of output: 564 [2019-11-24 04:27:30,620 WARN L192 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 711 DAG size of output: 710 [2019-11-24 04:27:32,485 WARN L192 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 710 DAG size of output: 709 [2019-11-24 04:27:35,224 WARN L192 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 912 DAG size of output: 911 [2019-11-24 04:27:38,388 WARN L192 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 911 DAG size of output: 905 [2019-11-24 04:27:41,797 WARN L192 SmtUtils]: Spent 3.13 s on a formula simplification that was a NOOP. DAG size: 903 [2019-11-24 04:27:45,279 WARN L192 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 904 DAG size of output: 903 [2019-11-24 04:27:47,028 WARN L192 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 635 [2019-11-24 04:27:48,639 WARN L192 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 636 DAG size of output: 636 [2019-11-24 04:27:51,778 WARN L192 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 873 DAG size of output: 873 [2019-11-24 04:27:55,045 WARN L192 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 874 DAG size of output: 871 [2019-11-24 04:28:00,907 WARN L192 SmtUtils]: Spent 5.79 s on a formula simplification. DAG size of input: 1206 DAG size of output: 1205 [2019-11-24 04:28:08,170 WARN L192 SmtUtils]: Spent 7.02 s on a formula simplification. DAG size of input: 1205 DAG size of output: 1197 [2019-11-24 04:28:13,195 WARN L192 SmtUtils]: Spent 4.64 s on a formula simplification that was a NOOP. DAG size: 994 [2019-11-24 04:28:17,945 WARN L192 SmtUtils]: Spent 4.75 s on a formula simplification. DAG size of input: 995 DAG size of output: 995 [2019-11-24 04:28:26,122 WARN L192 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 1324 DAG size of output: 1323 [2019-11-24 04:28:34,999 WARN L192 SmtUtils]: Spent 8.58 s on a formula simplification. DAG size of input: 1324 DAG size of output: 1320