/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:28:27,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:28:27,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:28:28,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:28:28,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:28:28,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:28:28,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:28:28,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:28:28,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:28:28,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:28:28,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:28:28,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:28:28,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:28:28,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:28:28,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:28:28,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:28:28,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:28:28,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:28:28,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:28:28,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:28:28,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:28:28,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:28:28,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:28:28,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:28:28,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:28:28,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:28:28,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:28:28,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:28:28,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:28:28,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:28:28,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:28:28,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:28:28,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:28:28,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:28:28,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:28:28,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:28:28,068 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 04:28:28,104 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:28:28,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:28:28,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:28:28,106 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:28:28,106 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:28:28,106 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:28:28,110 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:28:28,110 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:28:28,110 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:28:28,110 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:28:28,111 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:28:28,111 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:28:28,111 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:28:28,111 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:28:28,111 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:28:28,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:28:28,112 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:28:28,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:28:28,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:28:28,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:28:28,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:28:28,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:28:28,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:28:28,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:28:28,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:28:28,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:28:28,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:28:28,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:28:28,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:28:28,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:28:28,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:28:28,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:28:28,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:28:28,117 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:28:28,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:28:28,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:28:28,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:28:28,120 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:28:28,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:28:28,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:28:28,418 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:28:28,419 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:28:28,420 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:28:28,420 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2019-11-24 04:28:28,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01ca0d63/422bcb6ec1574d028a72cde2cfa7b7cc/FLAG6ceef819b [2019-11-24 04:28:28,949 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:28:28,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2019-11-24 04:28:28,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01ca0d63/422bcb6ec1574d028a72cde2cfa7b7cc/FLAG6ceef819b [2019-11-24 04:28:29,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01ca0d63/422bcb6ec1574d028a72cde2cfa7b7cc [2019-11-24 04:28:29,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:28:29,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:28:29,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:28:29,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:28:29,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:28:29,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5392c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29, skipping insertion in model container [2019-11-24 04:28:29,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:28:29,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:28:29,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:28:29,685 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:28:29,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:28:29,832 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:28:29,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29 WrapperNode [2019-11-24 04:28:29,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:28:29,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:28:29,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:28:29,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:28:29,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:28:29,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:28:29,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:28:29,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:28:29,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (1/1) ... [2019-11-24 04:28:29,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:28:29,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:28:29,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:28:29,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:28:29,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (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 04:28:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:28:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:28:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:28:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2019-11-24 04:28:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:28:30,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:28:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:28:30,604 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:28:30,604 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-24 04:28:30,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:28:30 BoogieIcfgContainer [2019-11-24 04:28:30,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:28:30,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:28:30,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:28:30,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:28:30,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:28:29" (1/3) ... [2019-11-24 04:28:30,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0f04fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:28:30, skipping insertion in model container [2019-11-24 04:28:30,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:28:29" (2/3) ... [2019-11-24 04:28:30,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0f04fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:28:30, skipping insertion in model container [2019-11-24 04:28:30,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:28:30" (3/3) ... [2019-11-24 04:28:30,621 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2019-11-24 04:28:30,631 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:28:30,639 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:28:30,651 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:28:30,681 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:28:30,681 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:28:30,682 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:28:30,682 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:28:30,682 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:28:30,682 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:28:30,683 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:28:30,683 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:28:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-24 04:28:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:28:30,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:28:30,712 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:28:30,712 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:28:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:28:30,719 INFO L82 PathProgramCache]: Analyzing trace with hash -947291602, now seen corresponding path program 1 times [2019-11-24 04:28:30,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:28:30,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95678830] [2019-11-24 04:28:30,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:28:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:28:30,911 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 04:28:30,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95678830] [2019-11-24 04:28:30,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:28:30,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:28:30,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165153663] [2019-11-24 04:28:30,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:28:30,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:28:30,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:28:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:28:30,940 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-24 04:28:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:28:30,970 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2019-11-24 04:28:30,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:28:30,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 04:28:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:28:30,982 INFO L225 Difference]: With dead ends: 43 [2019-11-24 04:28:30,982 INFO L226 Difference]: Without dead ends: 20 [2019-11-24 04:28:30,985 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 04:28:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-24 04:28:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-24 04:28:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-24 04:28:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-24 04:28:31,017 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2019-11-24 04:28:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:28:31,018 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-24 04:28:31,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:28:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-24 04:28:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:28:31,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:28:31,019 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:28:31,019 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:28:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:28:31,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1974463727, now seen corresponding path program 1 times [2019-11-24 04:28:31,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:28:31,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135038377] [2019-11-24 04:28:31,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:28:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:28:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:28:31,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135038377] [2019-11-24 04:28:31,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455771521] [2019-11-24 04:28:31,087 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 04:28:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:28:31,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:28:31,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:28:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:28:31,192 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:28:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:28:31,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065876819] [2019-11-24 04:28:31,244 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 04:28:31,244 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:28:31,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:28:31,258 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:28:31,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:28:34,774 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,790 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,802 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,835 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,847 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,864 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,876 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,888 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,899 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,912 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,926 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:34,935 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:28:35,074 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:28:35,408 WARN L192 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 37 [2019-11-24 04:28:35,560 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-11-24 04:28:35,697 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2019-11-24 04:28:35,890 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2019-11-24 04:28:36,055 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2019-11-24 04:28:36,306 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2019-11-24 04:28:36,613 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 63 [2019-11-24 04:28:36,838 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-11-24 04:28:36,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:28:36,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 13 [2019-11-24 04:28:36,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140898188] [2019-11-24 04:28:36,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-24 04:28:36,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:28:36,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-24 04:28:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-24 04:28:36,844 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 10 states. [2019-11-24 04:28:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:28:37,042 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-24 04:28:37,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 04:28:37,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-24 04:28:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:28:37,043 INFO L225 Difference]: With dead ends: 46 [2019-11-24 04:28:37,044 INFO L226 Difference]: Without dead ends: 23 [2019-11-24 04:28:37,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-24 04:28:37,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-24 04:28:37,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-24 04:28:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-24 04:28:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-24 04:28:37,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2019-11-24 04:28:37,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:28:37,051 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-24 04:28:37,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-24 04:28:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-24 04:28:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 04:28:37,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:28:37,052 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:28:37,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:28:37,263 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:28:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:28:37,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1939605663, now seen corresponding path program 1 times [2019-11-24 04:28:37,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:28:37,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564770574] [2019-11-24 04:28:37,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:28:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:28:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:28:37,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564770574] [2019-11-24 04:28:37,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451562774] [2019-11-24 04:28:37,330 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 04:28:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:28:37,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:28:37,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:28:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:28:37,382 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:28:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:28:37,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600233853] [2019-11-24 04:28:37,400 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-24 04:28:37,400 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:28:37,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:28:37,401 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:28:37,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:28:39,075 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 147 [2019-11-24 04:28:39,205 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 174 [2019-11-24 04:28:39,376 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 174 [2019-11-24 04:28:39,530 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 210 [2019-11-24 04:28:39,719 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 205 [2019-11-24 04:28:39,952 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 254 [2019-11-24 04:28:40,231 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 252 [2019-11-24 04:28:40,740 WARN L192 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 326 [2019-11-24 04:28:41,299 WARN L192 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 324 [2019-11-24 04:28:41,678 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 309 [2019-11-24 04:28:41,916 WARN L192 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 309 [2019-11-24 04:28:42,117 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2019-11-24 04:28:42,516 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:28:42,658 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-11-24 04:28:45,735 WARN L192 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 253 DAG size of output: 148 [2019-11-24 04:28:48,841 WARN L192 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 254 DAG size of output: 153 [2019-11-24 04:28:51,547 WARN L192 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 254 DAG size of output: 140 [2019-11-24 04:28:54,216 WARN L192 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 249 DAG size of output: 133 [2019-11-24 04:28:57,359 WARN L192 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 254 DAG size of output: 148 [2019-11-24 04:29:00,707 WARN L192 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 274 DAG size of output: 168 [2019-11-24 04:29:03,917 WARN L192 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 262 DAG size of output: 156 [2019-11-24 04:29:10,934 WARN L192 SmtUtils]: Spent 6.84 s on a formula simplification. DAG size of input: 426 DAG size of output: 201 [2019-11-24 04:29:18,341 WARN L192 SmtUtils]: Spent 7.20 s on a formula simplification. DAG size of input: 454 DAG size of output: 224 [2019-11-24 04:29:25,603 WARN L192 SmtUtils]: Spent 7.03 s on a formula simplification. DAG size of input: 436 DAG size of output: 205 [2019-11-24 04:29:32,849 WARN L192 SmtUtils]: Spent 7.02 s on a formula simplification. DAG size of input: 443 DAG size of output: 212 [2019-11-24 04:29:39,483 WARN L192 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 444 DAG size of output: 200 [2019-11-24 04:29:43,619 WARN L192 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 472 DAG size of output: 143 [2019-11-24 04:29:43,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:29:43,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [3, 3, 3] total 20 [2019-11-24 04:29:43,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433696435] [2019-11-24 04:29:43,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-24 04:29:43,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:29:43,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-24 04:29:43,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2019-11-24 04:29:43,625 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2019-11-24 04:29:44,031 WARN L192 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 55 [2019-11-24 04:29:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:29:44,531 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-11-24 04:29:44,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-24 04:29:44,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-11-24 04:29:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:29:44,533 INFO L225 Difference]: With dead ends: 38 [2019-11-24 04:29:44,533 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 04:29:44,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2019-11-24 04:29:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 04:29:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-24 04:29:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-24 04:29:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2019-11-24 04:29:44,543 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2019-11-24 04:29:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:29:44,543 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2019-11-24 04:29:44,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-24 04:29:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2019-11-24 04:29:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-24 04:29:44,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:29:44,544 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:29:44,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:44,747 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:29:44,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:29:44,747 INFO L82 PathProgramCache]: Analyzing trace with hash 713285621, now seen corresponding path program 1 times [2019-11-24 04:29:44,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:29:44,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428446479] [2019-11-24 04:29:44,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:29:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-24 04:29:44,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428446479] [2019-11-24 04:29:44,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041709495] [2019-11-24 04:29:44,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:29:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:29:44,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:29:44,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:29:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-24 04:29:44,855 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:29:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-24 04:29:44,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [794117881] [2019-11-24 04:29:44,878 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-24 04:29:44,878 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:29:44,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:29:44,882 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:29:44,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:29:47,532 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,546 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,557 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,568 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,580 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,607 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,619 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,629 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,639 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,655 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,664 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:47,672 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:29:48,107 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 144 [2019-11-24 04:29:48,377 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 164 [2019-11-24 04:29:48,579 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 197 [2019-11-24 04:29:48,912 WARN L192 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 196 [2019-11-24 04:29:49,254 WARN L192 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 234 [2019-11-24 04:29:49,516 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 234 [2019-11-24 04:29:49,759 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 294 [2019-11-24 04:29:50,074 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 292 [2019-11-24 04:29:50,352 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 278 [2019-11-24 04:29:50,489 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 278 [2019-11-24 04:29:50,611 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 276 [2019-11-24 04:29:51,247 WARN L192 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 464 [2019-11-24 04:29:55,244 WARN L192 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 466 [2019-11-24 04:29:55,722 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 482