java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label12_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 01:55:02,984 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 01:55:02,987 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 01:55:03,005 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 01:55:03,006 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 01:55:03,007 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 01:55:03,012 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 01:55:03,016 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 01:55:03,018 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 01:55:03,019 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 01:55:03,020 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 01:55:03,020 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 01:55:03,021 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 01:55:03,022 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 01:55:03,024 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 01:55:03,025 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 01:55:03,025 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 01:55:03,027 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 01:55:03,030 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 01:55:03,031 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 01:55:03,033 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 01:55:03,034 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 01:55:03,037 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-25 01:55:03,047 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-25 01:55:03,065 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 01:55:03,065 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 01:55:03,066 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 01:55:03,066 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 01:55:03,067 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 01:55:03,067 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 01:55:03,067 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 01:55:03,068 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 01:55:03,068 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 01:55:03,068 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 01:55:03,068 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 01:55:03,068 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 01:55:03,068 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 01:55:03,069 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 01:55:03,069 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 01:55:03,070 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 01:55:03,070 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 01:55:03,071 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 01:55:03,071 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 01:55:03,071 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 01:55:03,071 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 01:55:03,071 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 01:55:03,072 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 01:55:03,072 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 01:55:03,072 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 01:55:03,072 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 01:55:03,072 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 01:55:03,073 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 01:55:03,073 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 01:55:03,073 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 01:55:03,074 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 01:55:03,074 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 01:55:03,074 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 01:55:03,074 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 01:55:03,074 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 01:55:03,074 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 01:55:03,144 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 01:55:03,158 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 01:55:03,161 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 01:55:03,163 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 01:55:03,163 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 01:55:03,164 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label12_true-unreach-call.c [2018-10-25 01:55:03,222 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8a1ba07d0/0b53e7c97e1e4f8189341828be99e007/FLAG537f19058 [2018-10-25 01:55:03,940 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 01:55:03,940 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label12_true-unreach-call.c [2018-10-25 01:55:03,964 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8a1ba07d0/0b53e7c97e1e4f8189341828be99e007/FLAG537f19058 [2018-10-25 01:55:03,984 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8a1ba07d0/0b53e7c97e1e4f8189341828be99e007 [2018-10-25 01:55:03,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 01:55:04,000 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 01:55:04,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 01:55:04,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 01:55:04,010 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 01:55:04,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:55:03" (1/1) ... [2018-10-25 01:55:04,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31cb433d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:04, skipping insertion in model container [2018-10-25 01:55:04,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:55:03" (1/1) ... [2018-10-25 01:55:04,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 01:55:04,158 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 01:55:05,200 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:55:05,205 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 01:55:05,603 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:55:05,624 INFO L193 MainTranslator]: Completed translation [2018-10-25 01:55:05,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05 WrapperNode [2018-10-25 01:55:05,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 01:55:05,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 01:55:05,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 01:55:05,626 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 01:55:05,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (1/1) ... [2018-10-25 01:55:05,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (1/1) ... [2018-10-25 01:55:06,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 01:55:06,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 01:55:06,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 01:55:06,105 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 01:55:06,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (1/1) ... [2018-10-25 01:55:06,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (1/1) ... [2018-10-25 01:55:06,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (1/1) ... [2018-10-25 01:55:06,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (1/1) ... [2018-10-25 01:55:06,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (1/1) ... [2018-10-25 01:55:06,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (1/1) ... [2018-10-25 01:55:06,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (1/1) ... [2018-10-25 01:55:06,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 01:55:06,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 01:55:06,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 01:55:06,448 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 01:55:06,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-25 01:55:06,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 01:55:06,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 01:55:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-25 01:55:06,518 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-25 01:55:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 01:55:06,518 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 01:55:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 01:55:06,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 01:55:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 01:55:06,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 01:55:16,868 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 01:55:16,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:55:16 BoogieIcfgContainer [2018-10-25 01:55:16,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 01:55:16,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 01:55:16,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 01:55:16,875 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 01:55:16,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 01:55:03" (1/3) ... [2018-10-25 01:55:16,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9acdce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:55:16, skipping insertion in model container [2018-10-25 01:55:16,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:55:05" (2/3) ... [2018-10-25 01:55:16,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9acdce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:55:16, skipping insertion in model container [2018-10-25 01:55:16,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:55:16" (3/3) ... [2018-10-25 01:55:16,879 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label12_true-unreach-call.c [2018-10-25 01:55:16,891 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 01:55:16,909 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 01:55:16,929 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 01:55:16,985 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 01:55:16,985 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 01:55:16,986 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 01:55:16,986 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 01:55:16,986 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 01:55:16,986 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 01:55:16,986 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 01:55:16,987 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 01:55:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-25 01:55:17,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-25 01:55:17,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:55:17,046 INFO L375 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, 1] [2018-10-25 01:55:17,048 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:55:17,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:55:17,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1805373012, now seen corresponding path program 1 times [2018-10-25 01:55:17,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:55:17,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:17,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:55:17,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:17,111 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:55:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:55:17,604 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 5 [2018-10-25 01:55:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:55:17,623 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:55:17,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 01:55:17,623 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:55:17,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 01:55:17,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 01:55:17,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:55:17,648 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-25 01:55:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:55:29,714 INFO L93 Difference]: Finished difference Result 2139 states and 3961 transitions. [2018-10-25 01:55:29,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 01:55:29,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2018-10-25 01:55:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:55:29,759 INFO L225 Difference]: With dead ends: 2139 [2018-10-25 01:55:29,760 INFO L226 Difference]: Without dead ends: 1529 [2018-10-25 01:55:29,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:55:29,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-10-25 01:55:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2018-10-25 01:55:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2018-10-25 01:55:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2413 transitions. [2018-10-25 01:55:29,937 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2413 transitions. Word has length 40 [2018-10-25 01:55:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:55:29,937 INFO L481 AbstractCegarLoop]: Abstraction has 1527 states and 2413 transitions. [2018-10-25 01:55:29,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 01:55:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2413 transitions. [2018-10-25 01:55:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-25 01:55:29,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:55:29,945 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2018-10-25 01:55:29,945 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:55:29,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:55:29,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2053053534, now seen corresponding path program 1 times [2018-10-25 01:55:29,946 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:55:29,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:29,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:55:29,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:55:29,947 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:55:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:55:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:55:30,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:55:30,784 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:55:30,786 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 116 with the following transitions: [2018-10-25 01:55:30,788 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [930], [932], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:55:30,836 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:55:30,837 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:55:32,972 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:55:32,974 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 01:55:33,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:55:33,021 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:55:33,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:55:33,021 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:55:33,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:55:33,034 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:55:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:55:33,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:55:55,195 WARN L179 SmtUtils]: Spent 21.49 s on a formula simplification. DAG size of input: 135 DAG size of output: 83 [2018-10-25 01:56:15,457 WARN L179 SmtUtils]: Spent 16.09 s on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2018-10-25 01:56:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:56:15,859 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:56:16,542 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-25 01:56:16,876 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-25 01:56:19,357 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-25 01:56:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:56:19,610 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 01:56:19,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-25 01:56:19,610 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:56:19,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 01:56:19,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 01:56:19,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=163, Unknown=2, NotChecked=0, Total=210 [2018-10-25 01:56:19,613 INFO L87 Difference]: Start difference. First operand 1527 states and 2413 transitions. Second operand 6 states. [2018-10-25 01:56:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:56:39,913 INFO L93 Difference]: Finished difference Result 5752 states and 9360 transitions. [2018-10-25 01:56:39,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-25 01:56:39,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2018-10-25 01:56:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:56:39,942 INFO L225 Difference]: With dead ends: 5752 [2018-10-25 01:56:39,942 INFO L226 Difference]: Without dead ends: 4231 [2018-10-25 01:56:39,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=45, Invalid=163, Unknown=2, NotChecked=0, Total=210 [2018-10-25 01:56:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2018-10-25 01:56:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 4198. [2018-10-25 01:56:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2018-10-25 01:56:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 6423 transitions. [2018-10-25 01:56:40,088 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 6423 transitions. Word has length 115 [2018-10-25 01:56:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:56:40,089 INFO L481 AbstractCegarLoop]: Abstraction has 4198 states and 6423 transitions. [2018-10-25 01:56:40,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 01:56:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 6423 transitions. [2018-10-25 01:56:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-25 01:56:40,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:56:40,096 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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] [2018-10-25 01:56:40,097 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:56:40,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:56:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2103782277, now seen corresponding path program 1 times [2018-10-25 01:56:40,097 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:56:40,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:56:40,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:56:40,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:56:40,099 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:56:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:56:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:56:40,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:56:40,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-25 01:56:40,402 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:56:40,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 01:56:40,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 01:56:40,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-25 01:56:40,403 INFO L87 Difference]: Start difference. First operand 4198 states and 6423 transitions. Second operand 6 states. [2018-10-25 01:56:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:56:46,842 INFO L93 Difference]: Finished difference Result 12517 states and 20059 transitions. [2018-10-25 01:56:46,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-25 01:56:46,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2018-10-25 01:56:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:56:46,902 INFO L225 Difference]: With dead ends: 12517 [2018-10-25 01:56:46,903 INFO L226 Difference]: Without dead ends: 8325 [2018-10-25 01:56:46,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-25 01:56:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8325 states. [2018-10-25 01:56:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8325 to 8266. [2018-10-25 01:56:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8266 states. [2018-10-25 01:56:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8266 states to 8266 states and 12162 transitions. [2018-10-25 01:56:47,205 INFO L78 Accepts]: Start accepts. Automaton has 8266 states and 12162 transitions. Word has length 156 [2018-10-25 01:56:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:56:47,206 INFO L481 AbstractCegarLoop]: Abstraction has 8266 states and 12162 transitions. [2018-10-25 01:56:47,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 01:56:47,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8266 states and 12162 transitions. [2018-10-25 01:56:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-25 01:56:47,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:56:47,212 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:56:47,212 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:56:47,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:56:47,216 INFO L82 PathProgramCache]: Analyzing trace with hash 877086327, now seen corresponding path program 1 times [2018-10-25 01:56:47,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:56:47,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:56:47,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:56:47,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:56:47,218 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:56:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:56:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:56:47,649 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:56:47,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-25 01:56:47,650 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:56:47,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-25 01:56:47,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-25 01:56:47,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-25 01:56:47,651 INFO L87 Difference]: Start difference. First operand 8266 states and 12162 transitions. Second operand 7 states. [2018-10-25 01:57:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:57:09,537 INFO L93 Difference]: Finished difference Result 24697 states and 41612 transitions. [2018-10-25 01:57:09,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-25 01:57:09,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 174 [2018-10-25 01:57:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:57:09,716 INFO L225 Difference]: With dead ends: 24697 [2018-10-25 01:57:09,717 INFO L226 Difference]: Without dead ends: 16437 [2018-10-25 01:57:09,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-25 01:57:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16437 states. [2018-10-25 01:57:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16437 to 16194. [2018-10-25 01:57:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16194 states. [2018-10-25 01:57:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16194 states to 16194 states and 25296 transitions. [2018-10-25 01:57:10,386 INFO L78 Accepts]: Start accepts. Automaton has 16194 states and 25296 transitions. Word has length 174 [2018-10-25 01:57:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:57:10,386 INFO L481 AbstractCegarLoop]: Abstraction has 16194 states and 25296 transitions. [2018-10-25 01:57:10,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-25 01:57:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 16194 states and 25296 transitions. [2018-10-25 01:57:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-25 01:57:10,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:57:10,398 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 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] [2018-10-25 01:57:10,399 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:57:10,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash 669508885, now seen corresponding path program 1 times [2018-10-25 01:57:10,399 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:57:10,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:10,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:10,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:10,401 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:57:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:10,728 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 01:57:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 67 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-25 01:57:11,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:57:11,008 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:57:11,009 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 199 with the following transitions: [2018-10-25 01:57:11,009 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [930], [932], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1262], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:57:11,014 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:57:11,015 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:57:12,093 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:57:12,093 INFO L272 AbstractInterpreter]: Visited 92 different actions 262 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 01:57:12,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:12,125 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:57:12,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:57:12,125 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:57:12,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:12,136 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:57:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:12,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:57:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:57:12,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:57:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:57:12,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 01:57:12,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-25 01:57:12,879 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 01:57:12,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-25 01:57:12,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-25 01:57:12,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-25 01:57:12,881 INFO L87 Difference]: Start difference. First operand 16194 states and 25296 transitions. Second operand 9 states. [2018-10-25 01:57:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:57:26,456 INFO L93 Difference]: Finished difference Result 38668 states and 62173 transitions. [2018-10-25 01:57:26,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-25 01:57:26,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 198 [2018-10-25 01:57:26,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:57:26,556 INFO L225 Difference]: With dead ends: 38668 [2018-10-25 01:57:26,556 INFO L226 Difference]: Without dead ends: 19781 [2018-10-25 01:57:26,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 394 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-25 01:57:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19781 states. [2018-10-25 01:57:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19781 to 19721. [2018-10-25 01:57:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19721 states. [2018-10-25 01:57:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19721 states to 19721 states and 26144 transitions. [2018-10-25 01:57:27,112 INFO L78 Accepts]: Start accepts. Automaton has 19721 states and 26144 transitions. Word has length 198 [2018-10-25 01:57:27,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:57:27,112 INFO L481 AbstractCegarLoop]: Abstraction has 19721 states and 26144 transitions. [2018-10-25 01:57:27,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-25 01:57:27,113 INFO L276 IsEmpty]: Start isEmpty. Operand 19721 states and 26144 transitions. [2018-10-25 01:57:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-25 01:57:27,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:57:27,119 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-25 01:57:27,119 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:57:27,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:27,120 INFO L82 PathProgramCache]: Analyzing trace with hash 212290613, now seen corresponding path program 1 times [2018-10-25 01:57:27,120 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:57:27,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:27,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:27,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:27,122 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:57:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:27,460 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 01:57:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 105 proven. 41 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-25 01:57:28,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:57:28,253 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:57:28,253 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 216 with the following transitions: [2018-10-25 01:57:28,254 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [930], [932], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:57:28,262 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:57:28,262 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:57:28,593 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:57:28,593 INFO L272 AbstractInterpreter]: Visited 97 different actions 190 times. Merged at 7 different actions 8 times. Never widened. Found 2 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 01:57:28,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:28,627 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:57:28,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:57:28,627 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:57:28,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:28,645 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:57:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:28,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:57:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-25 01:57:29,160 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:57:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-25 01:57:29,712 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-25 01:57:29,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-25 01:57:29,713 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:57:29,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:57:29,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:57:29,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-25 01:57:29,716 INFO L87 Difference]: Start difference. First operand 19721 states and 26144 transitions. Second operand 3 states. [2018-10-25 01:57:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:57:34,516 INFO L93 Difference]: Finished difference Result 39436 states and 52282 transitions. [2018-10-25 01:57:34,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:57:34,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2018-10-25 01:57:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:57:34,583 INFO L225 Difference]: With dead ends: 39436 [2018-10-25 01:57:34,583 INFO L226 Difference]: Without dead ends: 19721 [2018-10-25 01:57:34,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 430 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-25 01:57:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19721 states. [2018-10-25 01:57:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19721 to 18845. [2018-10-25 01:57:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18845 states. [2018-10-25 01:57:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18845 states to 18845 states and 24186 transitions. [2018-10-25 01:57:35,050 INFO L78 Accepts]: Start accepts. Automaton has 18845 states and 24186 transitions. Word has length 215 [2018-10-25 01:57:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:57:35,051 INFO L481 AbstractCegarLoop]: Abstraction has 18845 states and 24186 transitions. [2018-10-25 01:57:35,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:57:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 18845 states and 24186 transitions. [2018-10-25 01:57:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-25 01:57:35,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:57:35,058 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:57:35,058 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:57:35,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash 291044899, now seen corresponding path program 1 times [2018-10-25 01:57:35,059 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:57:35,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:35,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:35,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:35,060 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:57:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-25 01:57:35,413 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:57:35,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-25 01:57:35,413 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:57:35,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-25 01:57:35,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-25 01:57:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:57:35,415 INFO L87 Difference]: Start difference. First operand 18845 states and 24186 transitions. Second operand 4 states. [2018-10-25 01:57:41,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:57:41,882 INFO L93 Difference]: Finished difference Result 62783 states and 83621 transitions. [2018-10-25 01:57:41,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-25 01:57:41,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 249 [2018-10-25 01:57:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:57:41,992 INFO L225 Difference]: With dead ends: 62783 [2018-10-25 01:57:41,992 INFO L226 Difference]: Without dead ends: 35339 [2018-10-25 01:57:42,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:57:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35339 states. [2018-10-25 01:57:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35339 to 33588. [2018-10-25 01:57:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33588 states. [2018-10-25 01:57:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33588 states to 33588 states and 41610 transitions. [2018-10-25 01:57:42,660 INFO L78 Accepts]: Start accepts. Automaton has 33588 states and 41610 transitions. Word has length 249 [2018-10-25 01:57:42,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:57:42,661 INFO L481 AbstractCegarLoop]: Abstraction has 33588 states and 41610 transitions. [2018-10-25 01:57:42,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-25 01:57:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 33588 states and 41610 transitions. [2018-10-25 01:57:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-10-25 01:57:42,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:57:42,679 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 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, 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, 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, 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] [2018-10-25 01:57:42,680 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:57:42,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:42,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2058344201, now seen corresponding path program 1 times [2018-10-25 01:57:42,680 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:57:42,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:42,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:42,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:42,681 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:57:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:57:43,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:57:43,445 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:57:43,446 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 389 with the following transitions: [2018-10-25 01:57:43,447 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [273], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [930], [932], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:57:43,461 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:57:43,462 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:57:44,582 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:57:44,582 INFO L272 AbstractInterpreter]: Visited 356 different actions 1054 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-25 01:57:44,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:44,627 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:57:44,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:57:44,628 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:57:44,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:44,640 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:57:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:44,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:57:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:57:45,063 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:57:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:57:45,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 01:57:45,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-10-25 01:57:45,884 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:57:45,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 01:57:45,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 01:57:45,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-10-25 01:57:45,885 INFO L87 Difference]: Start difference. First operand 33588 states and 41610 transitions. Second operand 6 states. [2018-10-25 01:57:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:57:53,580 INFO L93 Difference]: Finished difference Result 75507 states and 93618 transitions. [2018-10-25 01:57:53,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-25 01:57:53,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 388 [2018-10-25 01:57:53,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:57:53,723 INFO L225 Difference]: With dead ends: 75507 [2018-10-25 01:57:53,723 INFO L226 Difference]: Without dead ends: 40174 [2018-10-25 01:57:53,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 775 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-10-25 01:57:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40174 states. [2018-10-25 01:57:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40174 to 36672. [2018-10-25 01:57:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36672 states. [2018-10-25 01:57:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36672 states to 36672 states and 45347 transitions. [2018-10-25 01:57:54,503 INFO L78 Accepts]: Start accepts. Automaton has 36672 states and 45347 transitions. Word has length 388 [2018-10-25 01:57:54,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:57:54,504 INFO L481 AbstractCegarLoop]: Abstraction has 36672 states and 45347 transitions. [2018-10-25 01:57:54,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 01:57:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 36672 states and 45347 transitions. [2018-10-25 01:57:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2018-10-25 01:57:54,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:57:54,525 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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] [2018-10-25 01:57:54,525 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:57:54,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1672931390, now seen corresponding path program 1 times [2018-10-25 01:57:54,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:57:54,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:54,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:54,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:54,527 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:57:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:57:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-10-25 01:57:55,205 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:57:55,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-25 01:57:55,206 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:57:55,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:57:55,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:57:55,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 01:57:55,207 INFO L87 Difference]: Start difference. First operand 36672 states and 45347 transitions. Second operand 3 states. [2018-10-25 01:57:59,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:57:59,111 INFO L93 Difference]: Finished difference Result 75957 states and 94179 transitions. [2018-10-25 01:57:59,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:57:59,112 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 439 [2018-10-25 01:57:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:57:59,201 INFO L225 Difference]: With dead ends: 75957 [2018-10-25 01:57:59,201 INFO L226 Difference]: Without dead ends: 39291 [2018-10-25 01:57:59,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 01:57:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39291 states. [2018-10-25 01:57:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39291 to 38841. [2018-10-25 01:57:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38841 states. [2018-10-25 01:57:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38841 states to 38841 states and 47624 transitions. [2018-10-25 01:57:59,901 INFO L78 Accepts]: Start accepts. Automaton has 38841 states and 47624 transitions. Word has length 439 [2018-10-25 01:57:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:57:59,902 INFO L481 AbstractCegarLoop]: Abstraction has 38841 states and 47624 transitions. [2018-10-25 01:57:59,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:57:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 38841 states and 47624 transitions. [2018-10-25 01:57:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-10-25 01:57:59,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:57:59,971 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:57:59,971 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:57:59,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:57:59,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1387938801, now seen corresponding path program 1 times [2018-10-25 01:57:59,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:57:59,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:59,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:57:59,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:57:59,973 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:58:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:58:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 318 proven. 149 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-10-25 01:58:00,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:58:00,702 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:58:00,702 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 664 with the following transitions: [2018-10-25 01:58:00,703 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [930], [932], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1600], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:58:00,710 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:58:00,710 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:58:03,428 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:58:03,428 INFO L272 AbstractInterpreter]: Visited 309 different actions 619 times. Merged at 9 different actions 16 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-25 01:58:03,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:58:03,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:58:03,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:58:03,456 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:58:03,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:58:03,463 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:58:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:58:03,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:58:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 599 proven. 2 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-10-25 01:58:04,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:58:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 318 proven. 149 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-10-25 01:58:04,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 01:58:04,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-10-25 01:58:04,686 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 01:58:04,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-25 01:58:04,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-25 01:58:04,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-25 01:58:04,688 INFO L87 Difference]: Start difference. First operand 38841 states and 47624 transitions. Second operand 7 states. [2018-10-25 01:58:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:58:17,703 INFO L93 Difference]: Finished difference Result 94593 states and 121590 transitions. [2018-10-25 01:58:17,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-25 01:58:17,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 663 [2018-10-25 01:58:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:58:17,909 INFO L225 Difference]: With dead ends: 94593 [2018-10-25 01:58:17,909 INFO L226 Difference]: Without dead ends: 54883 [2018-10-25 01:58:17,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1343 GetRequests, 1329 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-10-25 01:58:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54883 states. [2018-10-25 01:58:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54883 to 53700. [2018-10-25 01:58:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53700 states. [2018-10-25 01:58:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53700 states to 53700 states and 65826 transitions. [2018-10-25 01:58:19,487 INFO L78 Accepts]: Start accepts. Automaton has 53700 states and 65826 transitions. Word has length 663 [2018-10-25 01:58:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:58:19,488 INFO L481 AbstractCegarLoop]: Abstraction has 53700 states and 65826 transitions. [2018-10-25 01:58:19,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-25 01:58:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 53700 states and 65826 transitions. [2018-10-25 01:58:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2018-10-25 01:58:19,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:58:19,545 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:58:19,545 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:58:19,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:58:19,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1521465965, now seen corresponding path program 1 times [2018-10-25 01:58:19,546 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:58:19,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:58:19,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:58:19,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:58:19,548 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:58:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:58:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-10-25 01:58:20,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:58:20,226 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:58:20,226 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 706 with the following transitions: [2018-10-25 01:58:20,228 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [930], [932], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1396], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1670], [1673], [1677], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:58:20,236 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:58:20,237 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:58:27,412 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:58:27,413 INFO L272 AbstractInterpreter]: Visited 311 different actions 940 times. Merged at 9 different actions 35 times. Widened at 1 different actions 2 times. Found 7 fixpoints after 4 different actions. Largest state had 26 variables. [2018-10-25 01:58:27,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:58:27,449 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:58:27,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:58:27,449 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:58:27,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:58:27,796 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:58:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:58:28,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:58:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 467 proven. 0 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2018-10-25 01:58:28,226 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:58:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-10-25 01:58:28,450 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 01:58:28,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-10-25 01:58:28,451 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:58:28,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:58:28,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:58:28,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:58:28,452 INFO L87 Difference]: Start difference. First operand 53700 states and 65826 transitions. Second operand 3 states. [2018-10-25 01:58:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:58:32,394 INFO L93 Difference]: Finished difference Result 117000 states and 143357 transitions. [2018-10-25 01:58:32,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:58:32,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 705 [2018-10-25 01:58:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:58:32,607 INFO L225 Difference]: With dead ends: 117000 [2018-10-25 01:58:32,607 INFO L226 Difference]: Without dead ends: 63306 [2018-10-25 01:58:32,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1412 GetRequests, 1410 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-25 01:58:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63306 states. [2018-10-25 01:58:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63306 to 58938. [2018-10-25 01:58:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58938 states. [2018-10-25 01:58:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58938 states to 58938 states and 71494 transitions. [2018-10-25 01:58:34,472 INFO L78 Accepts]: Start accepts. Automaton has 58938 states and 71494 transitions. Word has length 705 [2018-10-25 01:58:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:58:34,473 INFO L481 AbstractCegarLoop]: Abstraction has 58938 states and 71494 transitions. [2018-10-25 01:58:34,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:58:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 58938 states and 71494 transitions. [2018-10-25 01:58:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2018-10-25 01:58:34,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:58:34,532 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:58:34,533 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:58:34,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:58:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash 690052587, now seen corresponding path program 1 times [2018-10-25 01:58:34,534 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:58:34,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:58:34,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:58:34,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:58:34,535 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:58:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:58:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 114 proven. 11 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2018-10-25 01:58:36,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:58:36,289 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:58:36,289 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 752 with the following transitions: [2018-10-25 01:58:36,290 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [153], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [930], [932], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-25 01:58:36,296 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:58:36,297 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:58:39,769 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:58:39,770 INFO L272 AbstractInterpreter]: Visited 335 different actions 1016 times. Merged at 10 different actions 37 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-25 01:58:39,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:58:39,778 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:58:39,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:58:39,778 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-25 01:58:39,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:58:39,788 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:58:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:58:40,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:58:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 114 proven. 9 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-10-25 01:58:40,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:58:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 114 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:58:42,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-25 01:58:42,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 20 [2018-10-25 01:58:42,501 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-25 01:58:42,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-25 01:58:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-25 01:58:42,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2018-10-25 01:58:42,503 INFO L87 Difference]: Start difference. First operand 58938 states and 71494 transitions. Second operand 12 states. Received shutdown request... [2018-10-25 01:58:53,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-25 01:58:53,802 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-25 01:58:53,808 WARN L205 ceAbstractionStarter]: Timeout [2018-10-25 01:58:53,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 01:58:53 BoogieIcfgContainer [2018-10-25 01:58:53,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-25 01:58:53,809 INFO L168 Benchmark]: Toolchain (without parser) took 229811.12 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -30.8 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-25 01:58:53,810 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-25 01:58:53,811 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1623.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-25 01:58:53,812 INFO L168 Benchmark]: Boogie Procedure Inliner took 478.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 786.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -937.5 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-25 01:58:53,813 INFO L168 Benchmark]: Boogie Preprocessor took 342.80 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2018-10-25 01:58:53,813 INFO L168 Benchmark]: RCFGBuilder took 10422.62 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 473.2 MB). Peak memory consumption was 473.2 MB. Max. memory is 7.1 GB. [2018-10-25 01:58:53,814 INFO L168 Benchmark]: TraceAbstraction took 216937.58 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 1.5 GB in the end (delta: 267.4 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-10-25 01:58:53,819 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1623.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 478.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 786.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -937.5 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 342.80 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 10422.62 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 473.2 MB). Peak memory consumption was 473.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216937.58 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 1.5 GB in the end (delta: 267.4 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 107). Cancelled while BasicCegarLoop was constructing difference of abstraction (58938states) and FLOYD_HOARE automaton (currently 23 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (31374 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 216.8s OverallTime, 12 OverallIterations, 5 TraceHistogramMax, 127.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3952 SDtfs, 21082 SDslu, 2765 SDs, 0 SdLazy, 38671 SolverSat, 9745 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 109.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6205 GetRequests, 6073 SyntacticMatches, 18 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 51.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58938occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 18.3s AbstIntTime, 7 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 12527 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 59.4s InterpolantComputationTime, 7128 NumberOfCodeBlocks, 7128 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 10137 ConstructedInterpolants, 207 QuantifiedInterpolants, 17214965 SizeOfPredicates, 12 NumberOfNonLiveVariables, 4623 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 26 InterpolantComputations, 10 PerfectInterpolantSequences, 6964/7919 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown