/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_built_from_end.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:06:11,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:06:11,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:06:11,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:06:11,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:06:11,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:06:11,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:06:11,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:06:11,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:06:11,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:06:11,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:06:11,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:06:11,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:06:11,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:06:11,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:06:11,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:06:11,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:06:11,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:06:11,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:06:11,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:06:11,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:06:11,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:06:11,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:06:11,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:06:11,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:06:11,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:06:11,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:06:11,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:06:11,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:06:11,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:06:11,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:06:11,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:06:11,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:06:11,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:06:11,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:06:11,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:06:11,862 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 04:06:11,876 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:06:11,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:06:11,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:06:11,881 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:06:11,881 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:06:11,881 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:06:11,881 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:06:11,881 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:06:11,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:06:11,882 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:06:11,882 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:06:11,882 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:06:11,882 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:06:11,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:06:11,885 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:06:11,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:06:11,886 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:06:11,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:06:11,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:06:11,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:06:11,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:06:11,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:06:11,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:06:11,887 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:06:11,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:06:11,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:06:11,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:06:11,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:06:11,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:06:11,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:06:11,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:06:11,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:06:11,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:06:11,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:06:11,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:06:11,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:06:11,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:06:11,892 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:06:12,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:06:12,163 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:06:12,167 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:06:12,168 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:06:12,169 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:06:12,169 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple_built_from_end.i [2019-11-24 04:06:12,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ec624732/039ab097fff54a47986d9b7e7f0d12cd/FLAGf97e80f0b [2019-11-24 04:06:12,775 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:06:12,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/simple_built_from_end.i [2019-11-24 04:06:12,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ec624732/039ab097fff54a47986d9b7e7f0d12cd/FLAGf97e80f0b [2019-11-24 04:06:13,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ec624732/039ab097fff54a47986d9b7e7f0d12cd [2019-11-24 04:06:13,061 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:06:13,063 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:06:13,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:06:13,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:06:13,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:06:13,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c591f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13, skipping insertion in model container [2019-11-24 04:06:13,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:06:13,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:06:13,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:06:13,521 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:06:13,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:06:13,649 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:06:13,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13 WrapperNode [2019-11-24 04:06:13,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:06:13,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:06:13,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:06:13,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:06:13,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:06:13,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:06:13,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:06:13,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:06:13,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (1/1) ... [2019-11-24 04:06:13,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:06:13,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:06:13,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:06:13,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:06:13,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (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 04:06:13,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:06:13,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:06:13,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:06:13,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 04:06:13,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 04:06:13,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:06:13,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:06:14,083 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:06:14,084 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-24 04:06:14,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:06:14 BoogieIcfgContainer [2019-11-24 04:06:14,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:06:14,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:06:14,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:06:14,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:06:14,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:06:13" (1/3) ... [2019-11-24 04:06:14,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66087813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:06:14, skipping insertion in model container [2019-11-24 04:06:14,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:06:13" (2/3) ... [2019-11-24 04:06:14,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66087813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:06:14, skipping insertion in model container [2019-11-24 04:06:14,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:06:14" (3/3) ... [2019-11-24 04:06:14,092 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2019-11-24 04:06:14,102 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:06:14,109 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:06:14,118 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:06:14,137 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:06:14,137 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:06:14,137 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:06:14,138 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:06:14,138 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:06:14,138 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:06:14,138 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:06:14,138 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:06:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 04:06:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:06:14,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:06:14,156 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:06:14,157 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:06:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:06:14,161 INFO L82 PathProgramCache]: Analyzing trace with hash 73644442, now seen corresponding path program 1 times [2019-11-24 04:06:14,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:06:14,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082877674] [2019-11-24 04:06:14,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:06:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:14,285 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 04:06:14,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082877674] [2019-11-24 04:06:14,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:06:14,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:06:14,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357620479] [2019-11-24 04:06:14,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:06:14,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:06:14,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:06:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:06:14,311 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-11-24 04:06:14,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:06:14,332 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2019-11-24 04:06:14,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:06:14,333 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-24 04:06:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:06:14,345 INFO L225 Difference]: With dead ends: 17 [2019-11-24 04:06:14,346 INFO L226 Difference]: Without dead ends: 9 [2019-11-24 04:06:14,349 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 04:06:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-24 04:06:14,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-24 04:06:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:06:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-24 04:06:14,394 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-11-24 04:06:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:06:14,395 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-24 04:06:14,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:06:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-24 04:06:14,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:06:14,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:06:14,396 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:06:14,397 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:06:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:06:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2026470929, now seen corresponding path program 1 times [2019-11-24 04:06:14,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:06:14,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797994812] [2019-11-24 04:06:14,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:06:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:14,457 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 04:06:14,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797994812] [2019-11-24 04:06:14,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:06:14,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:06:14,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692614606] [2019-11-24 04:06:14,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:06:14,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:06:14,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:06:14,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:06:14,462 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2019-11-24 04:06:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:06:14,503 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2019-11-24 04:06:14,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:06:14,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-24 04:06:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:06:14,505 INFO L225 Difference]: With dead ends: 18 [2019-11-24 04:06:14,505 INFO L226 Difference]: Without dead ends: 12 [2019-11-24 04:06:14,506 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 04:06:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-24 04:06:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-11-24 04:06:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-24 04:06:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-24 04:06:14,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2019-11-24 04:06:14,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:06:14,510 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-24 04:06:14,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:06:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-24 04:06:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:06:14,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:06:14,511 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:06:14,512 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:06:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:06:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1729520065, now seen corresponding path program 1 times [2019-11-24 04:06:14,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:06:14,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410371187] [2019-11-24 04:06:14,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:06:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:06:14,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410371187] [2019-11-24 04:06:14,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:06:14,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:06:14,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772637621] [2019-11-24 04:06:14,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:06:14,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:06:14,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:06:14,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:06:14,663 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2019-11-24 04:06:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:06:14,708 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-11-24 04:06:14,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:06:14,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 04:06:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:06:14,709 INFO L225 Difference]: With dead ends: 17 [2019-11-24 04:06:14,710 INFO L226 Difference]: Without dead ends: 15 [2019-11-24 04:06:14,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:06:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-24 04:06:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2019-11-24 04:06:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-24 04:06:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-24 04:06:14,714 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2019-11-24 04:06:14,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:06:14,714 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-24 04:06:14,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:06:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-24 04:06:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:06:14,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:06:14,715 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:06:14,715 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:06:14,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:06:14,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1709371040, now seen corresponding path program 1 times [2019-11-24 04:06:14,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:06:14,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629068153] [2019-11-24 04:06:14,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:06:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:06:14,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629068153] [2019-11-24 04:06:14,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074943419] [2019-11-24 04:06:14,892 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 04:06:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:06:14,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-24 04:06:14,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:06:15,030 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 04:06:15,031 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:06:15,043 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:06:15,060 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 04:06:15,061 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 04:06:15,069 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:06:15,069 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:06:15,070 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-24 04:06:15,091 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 04:06:15,092 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:06:15,102 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:06:15,106 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 04:06:15,107 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 04:06:15,114 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:06:15,114 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 04:06:15,114 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-24 04:06:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:06:15,117 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:06:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:06:15,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113129290] [2019-11-24 04:06:15,188 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 04:06:15,189 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:06:15,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:06:15,201 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:06:15,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:06:15,361 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:15,754 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:15,923 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:16,603 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:16,990 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:17,462 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:18,199 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:18,703 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:19,808 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:20,023 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:20,609 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:20,622 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:20,661 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:21,407 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:22,979 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:23,890 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:24,076 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:24,516 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:27,589 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-11-24 04:06:27,808 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-11-24 04:06:28,071 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:29,163 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 497 [2019-11-24 04:06:29,491 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 498 [2019-11-24 04:06:29,768 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 499 [2019-11-24 04:06:30,930 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:31,909 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:32,896 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:33,513 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:34,057 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-24 04:06:35,343 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:35,888 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-24 04:06:35,894 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-11-24 04:06:35,929 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-24 04:06:36,394 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:36,498 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:36,547 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:36,560 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:36,627 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:36,860 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:36,924 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:37,049 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:37,224 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:37,756 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2019-11-24 04:06:38,225 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-11-24 04:06:38,481 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-24 04:06:38,642 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:40,182 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 662 [2019-11-24 04:06:40,527 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 656 [2019-11-24 04:06:40,840 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 650 [2019-11-24 04:06:41,152 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 651 [2019-11-24 04:06:41,704 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:41,817 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 644 [2019-11-24 04:06:43,004 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 640 [2019-11-24 04:06:43,412 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 638 [2019-11-24 04:06:43,621 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 639 [2019-11-24 04:06:43,933 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 640 [2019-11-24 04:06:44,284 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 642 [2019-11-24 04:06:44,477 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 643 [2019-11-24 04:06:44,761 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 644 [2019-11-24 04:06:45,784 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 640 [2019-11-24 04:06:46,689 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 637 [2019-11-24 04:06:47,556 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:50,108 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:50,960 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 603 [2019-11-24 04:06:50,985 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:51,794 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:06:52,110 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-24 04:06:53,162 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2019-11-24 04:06:56,425 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:01,139 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:01,202 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:07:01,397 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:07:01,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:07:01,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 5 [2019-11-24 04:07:01,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190134817] [2019-11-24 04:07:01,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:07:01,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:07:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:07:01,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-11-24 04:07:01,400 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2019-11-24 04:07:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:07:01,436 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-24 04:07:01,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:07:01,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-24 04:07:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:07:01,437 INFO L225 Difference]: With dead ends: 26 [2019-11-24 04:07:01,438 INFO L226 Difference]: Without dead ends: 17 [2019-11-24 04:07:01,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-11-24 04:07:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-24 04:07:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-24 04:07:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 04:07:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-24 04:07:01,442 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-11-24 04:07:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:07:01,442 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-24 04:07:01,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:07:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-24 04:07:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:07:01,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:07:01,443 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-24 04:07:01,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:07:01,652 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:07:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:07:01,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1795413774, now seen corresponding path program 2 times [2019-11-24 04:07:01,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:07:01,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519781522] [2019-11-24 04:07:01,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:07:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:07:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:07:01,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519781522] [2019-11-24 04:07:01,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069925972] [2019-11-24 04:07:01,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 04:07:01,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-24 04:07:01,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:07:01,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-24 04:07:01,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:07:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:07:02,114 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:07:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:07:02,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [919916930] [2019-11-24 04:07:02,352 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 04:07:02,352 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:07:02,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:07:02,354 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:07:02,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:07:02,429 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:02,678 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:02,789 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:03,331 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:03,611 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:04,039 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:04,652 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:05,120 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:05,807 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:05,984 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:07,525 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:07,635 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 377 [2019-11-24 04:07:08,567 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:09,998 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:10,208 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:10,658 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:10,948 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-24 04:07:11,101 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:11,115 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:11,275 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:11,604 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:11,705 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:11,846 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:12,338 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-11-24 04:07:13,423 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:14,054 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:16,783 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:17,159 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:17,730 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:18,080 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:18,228 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-24 04:07:19,060 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-24 04:07:19,063 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-11-24 04:07:19,071 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-24 04:07:19,378 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:19,397 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:19,623 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:20,045 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:20,248 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:20,292 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:20,306 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:20,317 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:20,870 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2019-11-24 04:07:21,200 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-11-24 04:07:21,470 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-24 04:07:21,626 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:22,939 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 662 [2019-11-24 04:07:23,310 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 656 [2019-11-24 04:07:23,676 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 650 [2019-11-24 04:07:23,885 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 651 [2019-11-24 04:07:24,433 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:24,549 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 639 [2019-11-24 04:07:24,752 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 640 [2019-11-24 04:07:24,948 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 641 [2019-11-24 04:07:25,358 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 642 [2019-11-24 04:07:25,548 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 643 [2019-11-24 04:07:25,738 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 644 [2019-11-24 04:07:26,071 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 645 [2019-11-24 04:07:26,281 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 646 [2019-11-24 04:07:26,744 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 647 [2019-11-24 04:07:28,214 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 646 [2019-11-24 04:07:31,830 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 631 [2019-11-24 04:07:33,316 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:35,087 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:36,710 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:37,604 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-11-24 04:07:37,978 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:07:38,083 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 607 [2019-11-24 04:07:38,813 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2019-11-24 04:07:42,479 WARN L227 Elim1Store]: Array PQE input equivalent to false