/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/ssh-simplified/s3_srvr_4.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:03:32,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:03:32,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:03:32,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 06:03:32,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 06:03:32,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 06:03:32,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 06:03:32,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 06:03:32,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 06:03:32,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 06:03:32,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 06:03:32,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 06:03:32,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 06:03:32,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 06:03:32,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 06:03:32,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 06:03:32,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 06:03:32,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 06:03:32,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 06:03:32,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 06:03:32,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 06:03:32,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 06:03:32,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 06:03:32,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 06:03:32,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 06:03:32,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 06:03:32,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 06:03:32,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 06:03:32,800 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 06:03:32,814 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:03:32,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:03:32,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:03:32,816 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:03:32,816 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:03:32,816 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:03:32,816 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:03:32,816 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:03:32,817 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:03:32,817 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:03:32,817 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:03:32,817 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:03:32,817 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:03:32,818 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:03:32,818 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:03:32,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:03:32,819 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:03:32,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:03:32,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:03:32,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:03:32,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:03:32,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:03:32,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:03:32,820 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:03:32,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:03:32,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:03:32,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:03:32,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:03:32,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:03:32,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:03:32,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:03:32,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:03:32,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:03:32,822 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:03:32,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:03:32,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:03:32,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:03:32,823 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:03:33,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:03:33,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:03:33,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:03:33,125 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:03:33,125 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:03:33,126 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_4.cil.c [2019-11-24 06:03:33,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/064388523/47cb16e33d6b4a16a11197529fddeb44/FLAG8f4537f87 [2019-11-24 06:03:33,632 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:03:33,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_4.cil.c [2019-11-24 06:03:33,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/064388523/47cb16e33d6b4a16a11197529fddeb44/FLAG8f4537f87 [2019-11-24 06:03:34,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/064388523/47cb16e33d6b4a16a11197529fddeb44 [2019-11-24 06:03:34,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:03:34,043 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:03:34,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:03:34,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:03:34,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:03:34,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35abdc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34, skipping insertion in model container [2019-11-24 06:03:34,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:03:34,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:03:34,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:03:34,626 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:03:34,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:03:34,756 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:03:34,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34 WrapperNode [2019-11-24 06:03:34,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:03:34,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:03:34,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:03:34,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:03:34,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:03:34,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:03:34,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:03:34,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:03:34,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (1/1) ... [2019-11-24 06:03:34,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:03:34,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:03:34,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:03:34,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:03:34,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (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 06:03:34,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:03:34,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:03:35,067 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-24 06:03:35,765 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2019-11-24 06:03:35,766 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2019-11-24 06:03:36,061 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:03:36,061 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 06:03:36,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:03:36 BoogieIcfgContainer [2019-11-24 06:03:36,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:03:36,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:03:36,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:03:36,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:03:36,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:03:34" (1/3) ... [2019-11-24 06:03:36,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6d8efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:03:36, skipping insertion in model container [2019-11-24 06:03:36,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:34" (2/3) ... [2019-11-24 06:03:36,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6d8efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:03:36, skipping insertion in model container [2019-11-24 06:03:36,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:03:36" (3/3) ... [2019-11-24 06:03:36,071 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_4.cil.c [2019-11-24 06:03:36,081 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:03:36,089 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:03:36,100 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:03:36,124 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:03:36,124 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:03:36,124 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:03:36,125 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:03:36,125 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:03:36,125 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:03:36,125 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:03:36,125 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:03:36,143 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2019-11-24 06:03:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-24 06:03:36,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:36,153 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:36,154 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:36,160 INFO L82 PathProgramCache]: Analyzing trace with hash 79839875, now seen corresponding path program 1 times [2019-11-24 06:03:36,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:36,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793268804] [2019-11-24 06:03:36,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:36,405 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 06:03:36,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793268804] [2019-11-24 06:03:36,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:36,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:03:36,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036310887] [2019-11-24 06:03:36,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:36,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:36,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:36,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:36,435 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 3 states. [2019-11-24 06:03:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:36,679 INFO L93 Difference]: Finished difference Result 231 states and 400 transitions. [2019-11-24 06:03:36,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:36,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-24 06:03:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:36,697 INFO L225 Difference]: With dead ends: 231 [2019-11-24 06:03:36,697 INFO L226 Difference]: Without dead ends: 121 [2019-11-24 06:03:36,701 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 06:03:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-24 06:03:36,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2019-11-24 06:03:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-24 06:03:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 174 transitions. [2019-11-24 06:03:36,759 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 174 transitions. Word has length 39 [2019-11-24 06:03:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:36,760 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 174 transitions. [2019-11-24 06:03:36,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 174 transitions. [2019-11-24 06:03:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-24 06:03:36,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:36,763 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:36,764 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:36,764 INFO L82 PathProgramCache]: Analyzing trace with hash -614018871, now seen corresponding path program 1 times [2019-11-24 06:03:36,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:36,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823860037] [2019-11-24 06:03:36,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:36,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823860037] [2019-11-24 06:03:36,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:36,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:36,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461131045] [2019-11-24 06:03:36,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:36,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:36,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:36,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:36,902 INFO L87 Difference]: Start difference. First operand 119 states and 174 transitions. Second operand 3 states. [2019-11-24 06:03:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:37,085 INFO L93 Difference]: Finished difference Result 257 states and 382 transitions. [2019-11-24 06:03:37,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:37,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-11-24 06:03:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:37,088 INFO L225 Difference]: With dead ends: 257 [2019-11-24 06:03:37,088 INFO L226 Difference]: Without dead ends: 140 [2019-11-24 06:03:37,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-24 06:03:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-11-24 06:03:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-24 06:03:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 196 transitions. [2019-11-24 06:03:37,117 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 196 transitions. Word has length 53 [2019-11-24 06:03:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:37,121 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 196 transitions. [2019-11-24 06:03:37,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 196 transitions. [2019-11-24 06:03:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-24 06:03:37,125 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:37,126 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:37,126 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2017995944, now seen corresponding path program 1 times [2019-11-24 06:03:37,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:37,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150816410] [2019-11-24 06:03:37,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 06:03:37,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150816410] [2019-11-24 06:03:37,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:37,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 06:03:37,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853988689] [2019-11-24 06:03:37,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 06:03:37,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:37,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 06:03:37,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:03:37,312 INFO L87 Difference]: Start difference. First operand 138 states and 196 transitions. Second operand 4 states. [2019-11-24 06:03:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:37,571 INFO L93 Difference]: Finished difference Result 319 states and 470 transitions. [2019-11-24 06:03:37,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 06:03:37,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-11-24 06:03:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:37,574 INFO L225 Difference]: With dead ends: 319 [2019-11-24 06:03:37,574 INFO L226 Difference]: Without dead ends: 183 [2019-11-24 06:03:37,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:03:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-24 06:03:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2019-11-24 06:03:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-24 06:03:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 238 transitions. [2019-11-24 06:03:37,588 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 238 transitions. Word has length 70 [2019-11-24 06:03:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:37,589 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 238 transitions. [2019-11-24 06:03:37,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 06:03:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 238 transitions. [2019-11-24 06:03:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-24 06:03:37,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:37,591 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:37,592 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:37,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:37,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1027784810, now seen corresponding path program 1 times [2019-11-24 06:03:37,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:37,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092962684] [2019-11-24 06:03:37,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-24 06:03:37,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092962684] [2019-11-24 06:03:37,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:37,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:37,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515957168] [2019-11-24 06:03:37,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:37,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:37,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:37,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:37,692 INFO L87 Difference]: Start difference. First operand 176 states and 238 transitions. Second operand 3 states. [2019-11-24 06:03:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:37,838 INFO L93 Difference]: Finished difference Result 383 states and 532 transitions. [2019-11-24 06:03:37,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:37,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-11-24 06:03:37,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:37,840 INFO L225 Difference]: With dead ends: 383 [2019-11-24 06:03:37,841 INFO L226 Difference]: Without dead ends: 209 [2019-11-24 06:03:37,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:37,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-11-24 06:03:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2019-11-24 06:03:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-24 06:03:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 264 transitions. [2019-11-24 06:03:37,854 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 264 transitions. Word has length 90 [2019-11-24 06:03:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:37,855 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 264 transitions. [2019-11-24 06:03:37,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 264 transitions. [2019-11-24 06:03:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-24 06:03:37,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:37,858 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:37,858 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 152171196, now seen corresponding path program 1 times [2019-11-24 06:03:37,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:37,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430823285] [2019-11-24 06:03:37,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:37,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430823285] [2019-11-24 06:03:37,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562836113] [2019-11-24 06:03:37,999 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 06:03:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:38,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:03:38,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:03:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:38,147 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:03:38,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:38,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:38,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:38,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-24 06:03:38,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [863439451] [2019-11-24 06:03:38,308 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2019-11-24 06:03:38,308 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 06:03:38,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 06:03:38,322 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 06:03:38,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 06:03:38,707 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-24 06:03:38,842 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-24 06:03:38,963 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-24 06:03:39,138 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2019-11-24 06:03:39,444 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 254 [2019-11-24 06:03:39,783 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2019-11-24 06:03:39,972 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 264 [2019-11-24 06:03:40,194 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 266 [2019-11-24 06:03:40,349 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 237 [2019-11-24 06:03:40,468 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 237 [2019-11-24 06:03:40,945 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 253 [2019-11-24 06:03:41,247 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 342 [2019-11-24 06:03:41,514 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 350 [2019-11-24 06:03:42,444 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 287 [2019-11-24 06:03:42,634 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 287 [2019-11-24 06:03:42,784 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2019-11-24 06:03:42,926 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 287 [2019-11-24 06:03:43,081 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 287 [2019-11-24 06:03:43,230 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2019-11-24 06:03:43,432 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-24 06:03:43,539 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-24 06:03:43,684 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-24 06:03:43,797 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-24 06:03:43,913 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-24 06:03:44,038 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-24 06:03:44,247 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 254 [2019-11-24 06:03:45,663 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 260 [2019-11-24 06:03:45,767 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 260 [2019-11-24 06:03:45,880 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 260 [2019-11-24 06:03:46,337 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2019-11-24 06:03:46,468 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2019-11-24 06:03:46,612 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 274 [2019-11-24 06:03:46,667 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 06:03:47,411 WARN L192 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 147 [2019-11-24 06:03:51,047 WARN L192 SmtUtils]: Spent 3.55 s on a formula simplification. DAG size of input: 262 DAG size of output: 205 [2019-11-24 06:03:54,820 WARN L192 SmtUtils]: Spent 3.66 s on a formula simplification. DAG size of input: 259 DAG size of output: 202 [2019-11-24 06:03:57,013 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 291 DAG size of output: 155 [2019-11-24 06:03:58,070 WARN L192 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 157 [2019-11-24 06:04:01,065 WARN L192 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 256 DAG size of output: 194 [2019-11-24 06:04:04,109 WARN L192 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 258 DAG size of output: 195 [2019-11-24 06:04:09,045 WARN L192 SmtUtils]: Spent 3.89 s on a formula simplification. DAG size of input: 292 DAG size of output: 194 [2019-11-24 06:04:10,727 WARN L192 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 296 DAG size of output: 164 [2019-11-24 06:04:11,937 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 284 DAG size of output: 165 [2019-11-24 06:04:16,466 WARN L192 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 297 DAG size of output: 184 [2019-11-24 06:04:19,933 WARN L192 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 301 DAG size of output: 180 [2019-11-24 06:04:25,130 WARN L192 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 354 DAG size of output: 164 [2019-11-24 06:04:26,995 WARN L192 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 354 DAG size of output: 167 [2019-11-24 06:04:28,878 WARN L192 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 332 DAG size of output: 171 [2019-11-24 06:04:29,873 WARN L192 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 167 [2019-11-24 06:04:36,681 WARN L192 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 355 DAG size of output: 171 [2019-11-24 06:04:38,825 WARN L192 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 349 DAG size of output: 173 [2019-11-24 06:04:38,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 06:04:38,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 5, 3] total 26 [2019-11-24 06:04:38,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610996833] [2019-11-24 06:04:38,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-24 06:04:38,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:04:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-24 06:04:38,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2019-11-24 06:04:38,830 INFO L87 Difference]: Start difference. First operand 199 states and 264 transitions. Second operand 20 states. [2019-11-24 06:04:39,983 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 203 DAG size of output: 150 [2019-11-24 06:04:44,128 WARN L192 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 194 DAG size of output: 169 [2019-11-24 06:04:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:04:47,636 INFO L93 Difference]: Finished difference Result 509 states and 680 transitions. [2019-11-24 06:04:47,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-24 06:04:47,637 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 108 [2019-11-24 06:04:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:04:47,640 INFO L225 Difference]: With dead ends: 509 [2019-11-24 06:04:47,640 INFO L226 Difference]: Without dead ends: 312 [2019-11-24 06:04:47,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 225 SyntacticMatches, 77 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2019-11-24 06:04:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2019-11-24 06:04:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 305. [2019-11-24 06:04:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2019-11-24 06:04:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 372 transitions. [2019-11-24 06:04:47,665 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 372 transitions. Word has length 108 [2019-11-24 06:04:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:04:47,665 INFO L462 AbstractCegarLoop]: Abstraction has 305 states and 372 transitions. [2019-11-24 06:04:47,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-24 06:04:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 372 transitions. [2019-11-24 06:04:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-24 06:04:47,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:04:47,667 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:04:47,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:04:47,869 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:04:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:04:47,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1392542738, now seen corresponding path program 1 times [2019-11-24 06:04:47,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:04:47,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472935757] [2019-11-24 06:04:47,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:04:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:04:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-24 06:04:47,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472935757] [2019-11-24 06:04:47,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:04:47,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:04:47,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986980552] [2019-11-24 06:04:47,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:04:47,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:04:47,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:04:47,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:04:47,948 INFO L87 Difference]: Start difference. First operand 305 states and 372 transitions. Second operand 3 states. [2019-11-24 06:04:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:04:47,976 INFO L93 Difference]: Finished difference Result 679 states and 866 transitions. [2019-11-24 06:04:47,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:04:47,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-11-24 06:04:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:04:47,979 INFO L225 Difference]: With dead ends: 679 [2019-11-24 06:04:47,979 INFO L226 Difference]: Without dead ends: 482 [2019-11-24 06:04:47,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:04:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2019-11-24 06:04:48,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 480. [2019-11-24 06:04:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2019-11-24 06:04:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 598 transitions. [2019-11-24 06:04:48,007 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 598 transitions. Word has length 111 [2019-11-24 06:04:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:04:48,007 INFO L462 AbstractCegarLoop]: Abstraction has 480 states and 598 transitions. [2019-11-24 06:04:48,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:04:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 598 transitions. [2019-11-24 06:04:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-24 06:04:48,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:04:48,013 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:04:48,014 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:04:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:04:48,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1668953834, now seen corresponding path program 1 times [2019-11-24 06:04:48,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:04:48,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980617754] [2019-11-24 06:04:48,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:04:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:04:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-24 06:04:48,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980617754] [2019-11-24 06:04:48,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:04:48,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:04:48,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018293575] [2019-11-24 06:04:48,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:04:48,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:04:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:04:48,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:04:48,084 INFO L87 Difference]: Start difference. First operand 480 states and 598 transitions. Second operand 3 states. [2019-11-24 06:04:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:04:48,119 INFO L93 Difference]: Finished difference Result 691 states and 873 transitions. [2019-11-24 06:04:48,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:04:48,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2019-11-24 06:04:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:04:48,122 INFO L225 Difference]: With dead ends: 691 [2019-11-24 06:04:48,122 INFO L226 Difference]: Without dead ends: 494 [2019-11-24 06:04:48,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:04:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2019-11-24 06:04:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 489. [2019-11-24 06:04:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2019-11-24 06:04:48,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 606 transitions. [2019-11-24 06:04:48,147 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 606 transitions. Word has length 113 [2019-11-24 06:04:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:04:48,148 INFO L462 AbstractCegarLoop]: Abstraction has 489 states and 606 transitions. [2019-11-24 06:04:48,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:04:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 606 transitions. [2019-11-24 06:04:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-24 06:04:48,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:04:48,150 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:04:48,150 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:04:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:04:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2035239012, now seen corresponding path program 1 times [2019-11-24 06:04:48,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:04:48,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204247072] [2019-11-24 06:04:48,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:04:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:04:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-24 06:04:48,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204247072] [2019-11-24 06:04:48,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:04:48,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:04:48,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849224761] [2019-11-24 06:04:48,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:04:48,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:04:48,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:04:48,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:04:48,190 INFO L87 Difference]: Start difference. First operand 489 states and 606 transitions. Second operand 3 states. [2019-11-24 06:04:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:04:48,327 INFO L93 Difference]: Finished difference Result 936 states and 1218 transitions. [2019-11-24 06:04:48,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:04:48,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2019-11-24 06:04:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:04:48,333 INFO L225 Difference]: With dead ends: 936 [2019-11-24 06:04:48,334 INFO L226 Difference]: Without dead ends: 554 [2019-11-24 06:04:48,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:04:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-11-24 06:04:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 538. [2019-11-24 06:04:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2019-11-24 06:04:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 659 transitions. [2019-11-24 06:04:48,360 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 659 transitions. Word has length 114 [2019-11-24 06:04:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:04:48,362 INFO L462 AbstractCegarLoop]: Abstraction has 538 states and 659 transitions. [2019-11-24 06:04:48,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:04:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 659 transitions. [2019-11-24 06:04:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-24 06:04:48,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:04:48,364 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:04:48,365 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:04:48,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:04:48,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1642914710, now seen corresponding path program 1 times [2019-11-24 06:04:48,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:04:48,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809686249] [2019-11-24 06:04:48,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:04:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:04:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:04:48,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809686249] [2019-11-24 06:04:48,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203887249] [2019-11-24 06:04:48,452 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 06:04:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:04:48,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:04:48,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:04:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:04:48,573 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:04:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-24 06:04:48,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446541100] [2019-11-24 06:04:48,654 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2019-11-24 06:04:48,655 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 06:04:48,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 06:04:48,656 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 06:04:48,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 06:04:49,075 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 246 [2019-11-24 06:04:49,235 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 269 [2019-11-24 06:04:49,527 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 258 [2019-11-24 06:04:49,765 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 258 [2019-11-24 06:04:49,900 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2019-11-24 06:04:50,199 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 299 [2019-11-24 06:04:50,487 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 298 [2019-11-24 06:04:50,706 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 284 [2019-11-24 06:04:51,002 WARN L192 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 284 [2019-11-24 06:04:51,256 WARN L192 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2019-11-24 06:04:51,656 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 316 [2019-11-24 06:04:51,962 WARN L192 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 316 [2019-11-24 06:04:52,119 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 293 [2019-11-24 06:04:52,299 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 381 [2019-11-24 06:04:52,601 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 381 [2019-11-24 06:04:52,842 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 282 [2019-11-24 06:04:53,090 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 282 [2019-11-24 06:04:53,252 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 276 [2019-11-24 06:04:54,456 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 325 [2019-11-24 06:04:54,581 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 325 [2019-11-24 06:04:54,733 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 321 [2019-11-24 06:04:54,870 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 325 [2019-11-24 06:04:55,010 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 325 [2019-11-24 06:04:55,141 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 321 [2019-11-24 06:04:55,374 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 363 [2019-11-24 06:04:55,534 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 363 [2019-11-24 06:04:55,741 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2019-11-24 06:04:55,901 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 363 [2019-11-24 06:04:56,062 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 363 [2019-11-24 06:04:56,259 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2019-11-24 06:04:56,498 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 299 [2019-11-24 06:04:56,643 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 299 [2019-11-24 06:04:56,761 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-24 06:04:56,963 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 316 [2019-11-24 06:04:57,120 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 316 [2019-11-24 06:04:57,266 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:04:57,455 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 334 [2019-11-24 06:04:57,636 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 334 [2019-11-24 06:04:57,813 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-24 06:04:58,010 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 336 [2019-11-24 06:04:58,202 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 336 [2019-11-24 06:04:58,411 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-24 06:04:58,601 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 336 [2019-11-24 06:04:58,793 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 336 [2019-11-24 06:04:58,992 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-24 06:04:59,337 WARN L192 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 355 [2019-11-24 06:04:59,613 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 355 [2019-11-24 06:04:59,882 WARN L192 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2019-11-24 06:05:00,266 WARN L192 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 360 [2019-11-24 06:05:00,742 WARN L192 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 360 [2019-11-24 06:05:01,066 WARN L192 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 354 [2019-11-24 06:05:01,405 WARN L192 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 360 [2019-11-24 06:05:01,749 WARN L192 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 360 [2019-11-24 06:05:02,074 WARN L192 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 354 [2019-11-24 06:05:02,474 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 367 [2019-11-24 06:05:02,850 WARN L192 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 367 [2019-11-24 06:05:03,203 WARN L192 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 367 [2019-11-24 06:05:03,238 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 06:05:03,866 WARN L192 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 147