/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/list-properties/simple-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:06:02,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:06:02,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:06:02,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:06:02,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:06:02,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:06:02,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:06:02,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:06:02,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:06:02,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:06:02,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:06:02,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:06:02,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:06:02,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:06:02,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:06:02,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:06:02,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:06:02,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:06:02,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:06:02,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:06:02,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:06:02,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:06:02,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:06:02,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:06:02,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:06:02,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:06:02,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:06:02,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:06:02,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:06:02,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:06:02,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:06:02,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:06:02,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:06:02,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:06:02,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:06:02,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:06:02,291 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 04:06:02,311 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:06:02,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:06:02,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:06:02,312 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:06:02,313 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:06:02,313 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:06:02,313 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:06:02,313 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:06:02,313 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:06:02,314 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:06:02,315 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:06:02,315 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:06:02,316 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:06:02,316 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:06:02,316 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:06:02,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:06:02,317 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:06:02,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:06:02,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:06:02,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:06:02,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:06:02,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:06:02,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:06:02,319 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:06:02,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:06:02,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:06:02,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:06:02,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:06:02,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:06:02,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:06:02,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:06:02,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:06:02,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:06:02,322 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:06:02,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:06:02,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:06:02,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:06:02,323 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:06:02,592 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:06:02,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:06:02,612 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:06:02,613 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:06:02,614 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:06:02,614 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple-2.i [2019-11-24 04:06:02,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25664df22/4b53035b98f3437788d3c4743b607348/FLAGf738d089c [2019-11-24 04:06:03,193 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:06:03,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/simple-2.i [2019-11-24 04:06:03,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25664df22/4b53035b98f3437788d3c4743b607348/FLAGf738d089c [2019-11-24 04:06:03,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25664df22/4b53035b98f3437788d3c4743b607348 [2019-11-24 04:06:03,534 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:06:03,536 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:06:03,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:06:03,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:06:03,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:06:03,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:06:03" (1/1) ... [2019-11-24 04:06:03,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8a0e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:03, skipping insertion in model container [2019-11-24 04:06:03,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:06:03" (1/1) ... [2019-11-24 04:06:03,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:06:03,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:06:04,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:06:04,046 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:06:04,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:06:04,152 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:06:04,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04 WrapperNode [2019-11-24 04:06:04,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:06:04,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:06:04,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:06:04,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:06:04,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (1/1) ... [2019-11-24 04:06:04,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (1/1) ... [2019-11-24 04:06:04,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:06:04,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:06:04,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:06:04,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:06:04,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (1/1) ... [2019-11-24 04:06:04,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (1/1) ... [2019-11-24 04:06:04,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (1/1) ... [2019-11-24 04:06:04,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (1/1) ... [2019-11-24 04:06:04,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (1/1) ... [2019-11-24 04:06:04,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (1/1) ... [2019-11-24 04:06:04,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (1/1) ... [2019-11-24 04:06:04,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:06:04,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:06:04,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:06:04,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:06:04,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (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 04:06:04,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:06:04,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:06:04,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:06:04,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:06:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:06:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:06:04,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:06:04,669 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:06:04,669 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-24 04:06:04,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:06:04 BoogieIcfgContainer [2019-11-24 04:06:04,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:06:04,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:06:04,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:06:04,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:06:04,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:06:03" (1/3) ... [2019-11-24 04:06:04,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ffdb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:06:04, skipping insertion in model container [2019-11-24 04:06:04,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:04" (2/3) ... [2019-11-24 04:06:04,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ffdb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:06:04, skipping insertion in model container [2019-11-24 04:06:04,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:06:04" (3/3) ... [2019-11-24 04:06:04,680 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-2.i [2019-11-24 04:06:04,688 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:06:04,695 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:06:04,707 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:06:04,731 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:06:04,731 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:06:04,731 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:06:04,732 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:06:04,732 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:06:04,732 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:06:04,732 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:06:04,732 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:06:04,744 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-24 04:06:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:06:04,751 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:06:04,752 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:06:04,753 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:06:04,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:06:04,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1849667143, now seen corresponding path program 1 times [2019-11-24 04:06:04,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:06:04,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756853455] [2019-11-24 04:06:04,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:06:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:04,890 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 04:06:04,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756853455] [2019-11-24 04:06:04,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:06:04,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:06:04,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572106529] [2019-11-24 04:06:04,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:06:04,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:06:04,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:06:04,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:06:04,917 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2019-11-24 04:06:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:06:04,936 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2019-11-24 04:06:04,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:06:04,937 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 04:06:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:06:04,947 INFO L225 Difference]: With dead ends: 21 [2019-11-24 04:06:04,948 INFO L226 Difference]: Without dead ends: 11 [2019-11-24 04:06:04,951 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 04:06:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-24 04:06:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-24 04:06:04,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:06:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-24 04:06:04,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2019-11-24 04:06:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:06:04,987 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-24 04:06:04,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:06:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-24 04:06:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:06:04,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:06:04,989 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:06:04,989 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:06:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:06:04,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1062469008, now seen corresponding path program 1 times [2019-11-24 04:06:04,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:06:04,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221807463] [2019-11-24 04:06:04,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:06:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:05,255 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 04:06:05,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221807463] [2019-11-24 04:06:05,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:06:05,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:06:05,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396762882] [2019-11-24 04:06:05,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:06:05,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:06:05,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:06:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:06:05,260 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2019-11-24 04:06:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:06:05,407 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-11-24 04:06:05,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 04:06:05,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-24 04:06:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:06:05,409 INFO L225 Difference]: With dead ends: 25 [2019-11-24 04:06:05,409 INFO L226 Difference]: Without dead ends: 23 [2019-11-24 04:06:05,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:06:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-24 04:06:05,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2019-11-24 04:06:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 04:06:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-24 04:06:05,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2019-11-24 04:06:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:06:05,425 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-24 04:06:05,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:06:05,426 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-24 04:06:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:06:05,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:06:05,428 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:06:05,429 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:06:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:06:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1889946821, now seen corresponding path program 1 times [2019-11-24 04:06:05,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:06:05,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130100456] [2019-11-24 04:06:05,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:06:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:06:05,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130100456] [2019-11-24 04:06:05,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631938462] [2019-11-24 04:06:05,549 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 04:06:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:05,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-24 04:06:05,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:06:05,729 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-24 04:06:05,730 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:06:05,745 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:06:05,750 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-24 04:06:05,751 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 04:06:05,758 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:06:05,760 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:06:05,760 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-24 04:06:05,796 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-24 04:06:05,797 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:06:05,804 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:06:05,807 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-24 04:06:05,807 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 04:06:05,811 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:06:05,812 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:06:05,812 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-24 04:06:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:06:05,814 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:06:05,846 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2019-11-24 04:06:05,850 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-24 04:06:05,862 INFO L567 ElimStorePlain]: treesize reduction 19, result has 36.7 percent of original size [2019-11-24 04:06:05,863 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_14| vanished before elimination [2019-11-24 04:06:05,863 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-24 04:06:05,863 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2019-11-24 04:06:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:06:05,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72921060] [2019-11-24 04:06:05,896 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-24 04:06:05,896 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:06:05,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:06:05,909 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:06:05,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:06:06,089 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:06,257 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:06:06,855 WARN L192 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2019-11-24 04:06:07,112 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2019-11-24 04:06:07,343 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2019-11-24 04:06:07,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:06:07,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5, 5] total 14 [2019-11-24 04:06:07,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023062235] [2019-11-24 04:06:07,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-24 04:06:07,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:06:07,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-24 04:06:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-24 04:06:07,347 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-11-24 04:06:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:06:07,429 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-24 04:06:07,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 04:06:07,429 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-24 04:06:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:06:07,430 INFO L225 Difference]: With dead ends: 27 [2019-11-24 04:06:07,430 INFO L226 Difference]: Without dead ends: 19 [2019-11-24 04:06:07,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-24 04:06:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-24 04:06:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2019-11-24 04:06:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-24 04:06:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-24 04:06:07,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2019-11-24 04:06:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:06:07,435 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-24 04:06:07,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-24 04:06:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-24 04:06:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:06:07,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:06:07,436 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:06:07,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:06:07,638 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:06:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:06:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash 44971144, now seen corresponding path program 1 times [2019-11-24 04:06:07,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:06:07,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593620213] [2019-11-24 04:06:07,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:06:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:07,911 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 04:06:07,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593620213] [2019-11-24 04:06:07,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138743276] [2019-11-24 04:06:07,912 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 04:06:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:07,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-24 04:06:07,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:06:08,274 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 04:06:08,274 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:06:08,670 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2019-11-24 04:06:08,816 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 04:06:08,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587611601] [2019-11-24 04:06:08,818 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-24 04:06:08,818 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:06:08,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:06:08,818 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:06:08,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:06:08,862 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:08,975 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:09,087 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:09,535 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:09,669 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:10,002 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:11,010 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:11,153 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:11,446 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:11,776 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:11,784 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:11,963 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:12,341 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2019-11-24 04:06:13,212 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:13,509 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:13,962 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:14,502 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:15,128 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:15,299 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:15,307 WARN L213 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:17,033 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:17,050 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:19,249 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:19,262 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:19,945 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:22,073 WARN L192 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 884 [2019-11-24 04:06:23,783 WARN L192 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 300 DAG size of output: 296