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-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label31_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 11:53:55,930 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 11:53:55,933 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 11:53:55,945 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 11:53:55,946 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 11:53:55,947 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 11:53:55,948 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 11:53:55,950 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 11:53:55,952 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 11:53:55,952 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 11:53:55,953 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 11:53:55,954 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 11:53:55,955 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 11:53:55,956 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 11:53:55,957 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 11:53:55,958 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 11:53:55,958 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 11:53:55,960 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 11:53:55,963 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 11:53:55,964 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 11:53:55,966 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 11:53:55,970 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 11:53:55,973 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 11:53:55,973 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 11:53:55,973 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 11:53:55,976 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 11:53:55,977 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 11:53:55,978 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 11:53:55,982 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 11:53:55,984 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 11:53:55,984 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 11:53:55,986 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 11:53:55,989 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 11:53:56,027 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 11:53:56,028 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 11:53:56,029 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 11:53:56,029 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 11:53:56,029 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 11:53:56,030 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 11:53:56,030 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 11:53:56,030 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 11:53:56,030 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 11:53:56,030 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 11:53:56,031 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 11:53:56,031 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 11:53:56,032 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 11:53:56,032 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 11:53:56,032 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 11:53:56,032 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 11:53:56,032 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 11:53:56,033 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 11:53:56,034 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 11:53:56,034 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 11:53:56,034 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 11:53:56,034 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 11:53:56,034 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 11:53:56,035 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 11:53:56,035 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 11:53:56,035 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 11:53:56,036 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 11:53:56,036 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 11:53:56,036 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 11:53:56,036 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 11:53:56,037 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 11:53:56,037 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 11:53:56,037 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 11:53:56,037 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 11:53:56,108 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 11:53:56,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 11:53:56,131 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 11:53:56,132 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 11:53:56,133 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 11:53:56,133 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label31_false-unreach-call.c [2018-10-27 11:53:56,200 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6188a687c/e59944d1e9334bc9895ef029e3780a7e/FLAG2a4e8ca72 [2018-10-27 11:53:56,934 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 11:53:56,935 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label31_false-unreach-call.c [2018-10-27 11:53:56,964 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6188a687c/e59944d1e9334bc9895ef029e3780a7e/FLAG2a4e8ca72 [2018-10-27 11:53:56,984 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/6188a687c/e59944d1e9334bc9895ef029e3780a7e [2018-10-27 11:53:56,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 11:53:57,001 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 11:53:57,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 11:53:57,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 11:53:57,008 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 11:53:57,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:53:56" (1/1) ... [2018-10-27 11:53:57,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c8889d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:57, skipping insertion in model container [2018-10-27 11:53:57,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:53:56" (1/1) ... [2018-10-27 11:53:57,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 11:53:57,149 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 11:53:58,258 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:53:58,262 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 11:53:58,627 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 11:53:58,650 INFO L193 MainTranslator]: Completed translation [2018-10-27 11:53:58,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58 WrapperNode [2018-10-27 11:53:58,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 11:53:58,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 11:53:58,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 11:53:58,652 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 11:53:58,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (1/1) ... [2018-10-27 11:53:58,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (1/1) ... [2018-10-27 11:53:59,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 11:53:59,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 11:53:59,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 11:53:59,144 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 11:53:59,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (1/1) ... [2018-10-27 11:53:59,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (1/1) ... [2018-10-27 11:53:59,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (1/1) ... [2018-10-27 11:53:59,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (1/1) ... [2018-10-27 11:53:59,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (1/1) ... [2018-10-27 11:53:59,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (1/1) ... [2018-10-27 11:53:59,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (1/1) ... [2018-10-27 11:53:59,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 11:53:59,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 11:53:59,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 11:53:59,470 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 11:53:59,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (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 [2018-10-27 11:53:59,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 11:53:59,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 11:53:59,549 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 11:53:59,549 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 11:53:59,549 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 11:53:59,549 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 11:53:59,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 11:53:59,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 11:53:59,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 11:53:59,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 11:54:11,416 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 11:54:11,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:54:11 BoogieIcfgContainer [2018-10-27 11:54:11,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 11:54:11,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 11:54:11,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 11:54:11,422 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 11:54:11,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:53:56" (1/3) ... [2018-10-27 11:54:11,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51593c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:54:11, skipping insertion in model container [2018-10-27 11:54:11,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:53:58" (2/3) ... [2018-10-27 11:54:11,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51593c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:54:11, skipping insertion in model container [2018-10-27 11:54:11,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:54:11" (3/3) ... [2018-10-27 11:54:11,426 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label31_false-unreach-call.c [2018-10-27 11:54:11,436 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 11:54:11,446 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 11:54:11,464 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 11:54:11,507 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 11:54:11,508 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 11:54:11,508 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 11:54:11,508 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 11:54:11,508 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 11:54:11,509 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 11:54:11,509 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 11:54:11,509 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 11:54:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 11:54:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 11:54:11,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:54:11,552 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:54:11,555 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:54:11,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:54:11,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1332199658, now seen corresponding path program 1 times [2018-10-27 11:54:11,564 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:54:11,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:54:11,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:54:11,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:54:11,625 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:54:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:54:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:54:11,989 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:54:11,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 11:54:11,989 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:54:11,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 11:54:12,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 11:54:12,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:54:12,017 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 11:54:23,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:54:23,296 INFO L93 Difference]: Finished difference Result 2118 states and 3937 transitions. [2018-10-27 11:54:23,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 11:54:23,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-27 11:54:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:54:23,330 INFO L225 Difference]: With dead ends: 2118 [2018-10-27 11:54:23,330 INFO L226 Difference]: Without dead ends: 1508 [2018-10-27 11:54:23,348 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 [2018-10-27 11:54:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2018-10-27 11:54:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1039. [2018-10-27 11:54:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2018-10-27 11:54:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1596 transitions. [2018-10-27 11:54:23,514 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1596 transitions. Word has length 15 [2018-10-27 11:54:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:54:23,514 INFO L481 AbstractCegarLoop]: Abstraction has 1039 states and 1596 transitions. [2018-10-27 11:54:23,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 11:54:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1596 transitions. [2018-10-27 11:54:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-27 11:54:23,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:54:23,523 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:54:23,524 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:54:23,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:54:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1251140705, now seen corresponding path program 1 times [2018-10-27 11:54:23,525 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:54:23,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:54:23,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:54:23,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:54:23,528 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:54:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:54:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:54:24,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:54:24,143 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:54:24,144 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 91 with the following transitions: [2018-10-27 11:54:24,147 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [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] [2018-10-27 11:54:24,217 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:54:24,218 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:54:24,653 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:54:27,804 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 11:54:27,807 INFO L272 AbstractInterpreter]: Visited 83 different actions 467 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 11:54:27,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:54:27,851 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 11:54:27,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:54:27,851 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 [2018-10-27 11:54:27,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:54:27,873 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 11:54:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:54:27,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 11:54:28,774 WARN L179 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-10-27 11:54:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:54:28,941 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 11:54:30,152 WARN L179 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2018-10-27 11:54:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:54:30,741 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 11:54:30,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-10-27 11:54:30,741 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:54:30,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 11:54:30,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 11:54:30,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-27 11:54:30,745 INFO L87 Difference]: Start difference. First operand 1039 states and 1596 transitions. Second operand 6 states. [2018-10-27 11:54:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:54:48,840 INFO L93 Difference]: Finished difference Result 3453 states and 5550 transitions. [2018-10-27 11:54:48,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 11:54:48,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2018-10-27 11:54:48,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:54:48,861 INFO L225 Difference]: With dead ends: 3453 [2018-10-27 11:54:48,861 INFO L226 Difference]: Without dead ends: 2420 [2018-10-27 11:54:48,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-27 11:54:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2018-10-27 11:54:48,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2412. [2018-10-27 11:54:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2412 states. [2018-10-27 11:54:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3754 transitions. [2018-10-27 11:54:48,968 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3754 transitions. Word has length 90 [2018-10-27 11:54:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:54:48,969 INFO L481 AbstractCegarLoop]: Abstraction has 2412 states and 3754 transitions. [2018-10-27 11:54:48,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 11:54:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3754 transitions. [2018-10-27 11:54:48,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-27 11:54:48,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:54:48,979 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 11:54:48,979 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:54:48,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:54:48,979 INFO L82 PathProgramCache]: Analyzing trace with hash 785805159, now seen corresponding path program 1 times [2018-10-27 11:54:48,980 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:54:48,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:54:48,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:54:48,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:54:48,983 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:54:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:54:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:54:49,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:54:49,268 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:54:49,268 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 104 with the following transitions: [2018-10-27 11:54:49,269 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [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], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 11:54:49,273 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:54:49,274 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:54:49,377 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:54:50,099 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 11:54:50,100 INFO L272 AbstractInterpreter]: Visited 96 different actions 274 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 11:54:50,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:54:50,128 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 11:54:50,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:54:50,129 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 [2018-10-27 11:54:50,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:54:50,139 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 11:54:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:54:50,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 11:54:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:54:50,265 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 11:54:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:54:50,339 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 11:54:50,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-27 11:54:50,340 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:54:50,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 11:54:50,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 11:54:50,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 11:54:50,341 INFO L87 Difference]: Start difference. First operand 2412 states and 3754 transitions. Second operand 3 states. [2018-10-27 11:54:56,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:54:56,831 INFO L93 Difference]: Finished difference Result 6995 states and 11104 transitions. [2018-10-27 11:54:56,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 11:54:56,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2018-10-27 11:54:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:54:56,869 INFO L225 Difference]: With dead ends: 6995 [2018-10-27 11:54:56,869 INFO L226 Difference]: Without dead ends: 4589 [2018-10-27 11:54:56,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 11:54:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2018-10-27 11:54:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 4588. [2018-10-27 11:54:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4588 states. [2018-10-27 11:54:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 7097 transitions. [2018-10-27 11:54:57,014 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 7097 transitions. Word has length 103 [2018-10-27 11:54:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:54:57,014 INFO L481 AbstractCegarLoop]: Abstraction has 4588 states and 7097 transitions. [2018-10-27 11:54:57,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 11:54:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 7097 transitions. [2018-10-27 11:54:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-27 11:54:57,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:54:57,030 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:54:57,030 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:54:57,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:54:57,030 INFO L82 PathProgramCache]: Analyzing trace with hash -910710122, now seen corresponding path program 1 times [2018-10-27 11:54:57,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:54:57,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:54:57,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:54:57,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:54:57,032 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:54:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:54:57,400 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 11:54:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-27 11:54:57,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:54:57,858 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:54:57,858 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 181 with the following transitions: [2018-10-27 11:54:57,859 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [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], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1290], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 11:54:57,866 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:54:57,866 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:54:57,950 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:54:59,896 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 11:54:59,896 INFO L272 AbstractInterpreter]: Visited 99 different actions 563 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 11:54:59,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:54:59,937 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 11:54:59,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:54:59,937 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 [2018-10-27 11:54:59,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:54:59,950 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 11:55:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:55:00,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 11:55:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:55:00,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 11:55:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:55:00,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 11:55:00,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 11:55:00,598 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 11:55:00,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 11:55:00,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 11:55:00,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-27 11:55:00,600 INFO L87 Difference]: Start difference. First operand 4588 states and 7097 transitions. Second operand 9 states. [2018-10-27 11:55:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:55:08,777 INFO L93 Difference]: Finished difference Result 11486 states and 17894 transitions. [2018-10-27 11:55:08,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 11:55:08,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 180 [2018-10-27 11:55:08,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:55:08,811 INFO L225 Difference]: With dead ends: 11486 [2018-10-27 11:55:08,811 INFO L226 Difference]: Without dead ends: 6418 [2018-10-27 11:55:08,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 358 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-27 11:55:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6418 states. [2018-10-27 11:55:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6418 to 6406. [2018-10-27 11:55:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6406 states. [2018-10-27 11:55:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6406 states to 6406 states and 7901 transitions. [2018-10-27 11:55:08,999 INFO L78 Accepts]: Start accepts. Automaton has 6406 states and 7901 transitions. Word has length 180 [2018-10-27 11:55:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:55:08,999 INFO L481 AbstractCegarLoop]: Abstraction has 6406 states and 7901 transitions. [2018-10-27 11:55:09,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 11:55:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 6406 states and 7901 transitions. [2018-10-27 11:55:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-27 11:55:09,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:55:09,002 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:55:09,003 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:55:09,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:55:09,003 INFO L82 PathProgramCache]: Analyzing trace with hash -356935277, now seen corresponding path program 1 times [2018-10-27 11:55:09,003 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:55:09,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:55:09,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:55:09,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:55:09,004 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:55:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:55:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 11:55:09,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 11:55:09,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 11:55:09,329 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 11:55:09,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 11:55:09,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 11:55:09,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 11:55:09,331 INFO L87 Difference]: Start difference. First operand 6406 states and 7901 transitions. Second operand 4 states. [2018-10-27 11:55:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:55:16,849 INFO L93 Difference]: Finished difference Result 23359 states and 29966 transitions. [2018-10-27 11:55:16,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 11:55:16,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 192 [2018-10-27 11:55:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:55:16,928 INFO L225 Difference]: With dead ends: 23359 [2018-10-27 11:55:16,929 INFO L226 Difference]: Without dead ends: 16959 [2018-10-27 11:55:16,960 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 [2018-10-27 11:55:16,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16959 states. [2018-10-27 11:55:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16959 to 16952. [2018-10-27 11:55:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16952 states. [2018-10-27 11:55:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16952 states to 16952 states and 20905 transitions. [2018-10-27 11:55:17,399 INFO L78 Accepts]: Start accepts. Automaton has 16952 states and 20905 transitions. Word has length 192 [2018-10-27 11:55:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:55:17,400 INFO L481 AbstractCegarLoop]: Abstraction has 16952 states and 20905 transitions. [2018-10-27 11:55:17,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 11:55:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 16952 states and 20905 transitions. [2018-10-27 11:55:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-10-27 11:55:17,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:55:17,408 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:55:17,408 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:55:17,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:55:17,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1935146459, now seen corresponding path program 1 times [2018-10-27 11:55:17,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:55:17,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:55:17,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:55:17,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:55:17,410 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:55:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:55:18,081 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-27 11:55:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 11:55:18,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:55:18,597 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:55:18,598 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 270 with the following transitions: [2018-10-27 11:55:18,598 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [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], [1692], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 11:55:18,610 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:55:18,611 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:55:18,687 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:55:19,547 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 11:55:19,547 INFO L272 AbstractInterpreter]: Visited 175 different actions 511 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 11:55:19,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:55:19,581 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 11:55:19,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:55:19,581 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 [2018-10-27 11:55:19,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:55:19,593 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 11:55:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:55:19,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 11:55:20,528 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-10-27 11:55:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-27 11:55:20,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 11:55:23,025 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-10-27 11:55:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 21 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 11:55:23,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 11:55:23,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 19 [2018-10-27 11:55:23,813 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 11:55:23,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-27 11:55:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 11:55:23,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2018-10-27 11:55:23,815 INFO L87 Difference]: Start difference. First operand 16952 states and 20905 transitions. Second operand 14 states. [2018-10-27 11:56:28,854 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2018-10-27 11:56:48,655 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-27 11:57:12,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:57:12,154 INFO L93 Difference]: Finished difference Result 137339 states and 189488 transitions. [2018-10-27 11:57:12,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-10-27 11:57:12,154 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 269 [2018-10-27 11:57:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:57:12,927 INFO L225 Difference]: With dead ends: 137339 [2018-10-27 11:57:12,927 INFO L226 Difference]: Without dead ends: 87742 [2018-10-27 11:57:13,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 531 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13127 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=4263, Invalid=29043, Unknown=0, NotChecked=0, Total=33306 [2018-10-27 11:57:13,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87742 states. [2018-10-27 11:57:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87742 to 81149. [2018-10-27 11:57:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81149 states. [2018-10-27 11:57:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81149 states to 81149 states and 104637 transitions. [2018-10-27 11:57:16,661 INFO L78 Accepts]: Start accepts. Automaton has 81149 states and 104637 transitions. Word has length 269 [2018-10-27 11:57:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 11:57:16,662 INFO L481 AbstractCegarLoop]: Abstraction has 81149 states and 104637 transitions. [2018-10-27 11:57:16,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-27 11:57:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 81149 states and 104637 transitions. [2018-10-27 11:57:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2018-10-27 11:57:16,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 11:57:16,690 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 11:57:16,690 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 11:57:16,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:57:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash 340377603, now seen corresponding path program 1 times [2018-10-27 11:57:16,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 11:57:16,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:57:16,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:57:16,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 11:57:16,692 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 11:57:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:57:17,285 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-27 11:57:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 30 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-27 11:57:17,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:57:17,557 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 11:57:17,557 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 418 with the following transitions: [2018-10-27 11:57:17,557 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [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], [1376], [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], [1873], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 11:57:17,562 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 11:57:17,563 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 11:57:17,625 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 11:57:20,766 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 11:57:20,766 INFO L272 AbstractInterpreter]: Visited 216 different actions 1079 times. Merged at 8 different actions 44 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-27 11:57:20,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 11:57:20,775 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 11:57:20,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 11:57:20,775 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 [2018-10-27 11:57:20,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 11:57:20,784 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 11:57:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 11:57:20,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 11:57:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 11:57:21,246 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 11:57:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 11:57:21,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 11:57:21,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-10-27 11:57:21,839 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 11:57:21,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 11:57:21,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 11:57:21,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-10-27 11:57:21,842 INFO L87 Difference]: Start difference. First operand 81149 states and 104637 transitions. Second operand 10 states. [2018-10-27 11:57:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 11:57:48,971 INFO L93 Difference]: Finished difference Result 213764 states and 279356 transitions. [2018-10-27 11:57:48,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-27 11:57:48,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 417 [2018-10-27 11:57:48,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 11:57:49,567 INFO L225 Difference]: With dead ends: 213764 [2018-10-27 11:57:49,568 INFO L226 Difference]: Without dead ends: 120246 [2018-10-27 11:57:49,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 847 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2018-10-27 11:57:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120246 states. Received shutdown request... [2018-10-27 11:57:50,725 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 11:57:50,730 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 11:57:50,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 11:57:50 BoogieIcfgContainer [2018-10-27 11:57:50,731 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 11:57:50,732 INFO L168 Benchmark]: Toolchain (without parser) took 233731.37 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -667.5 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-27 11:57:50,733 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 11:57:50,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1648.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-27 11:57:50,734 INFO L168 Benchmark]: Boogie Procedure Inliner took 492.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -908.8 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2018-10-27 11:57:50,735 INFO L168 Benchmark]: Boogie Preprocessor took 325.90 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2018-10-27 11:57:50,736 INFO L168 Benchmark]: RCFGBuilder took 11947.26 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 478.0 MB). Peak memory consumption was 478.0 MB. Max. memory is 7.1 GB. [2018-10-27 11:57:50,737 INFO L168 Benchmark]: TraceAbstraction took 219312.45 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 2.1 GB in the end (delta: -402.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-27 11:57:50,748 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1648.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 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 492.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -908.8 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 325.90 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11947.26 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 478.0 MB). Peak memory consumption was 478.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219312.45 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 2.1 GB in the end (delta: -402.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 32]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 32). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 219.2s OverallTime, 7 OverallIterations, 4 TraceHistogramMax, 189.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2881 SDtfs, 32153 SDslu, 4307 SDs, 0 SdLazy, 62309 SolverSat, 10017 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 159.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2379 GetRequests, 2123 SyntacticMatches, 12 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13350 ImplicationChecksByTransitivity, 14.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81149occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.8s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 5.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 7090 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 2325 NumberOfCodeBlocks, 2325 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 3367 ConstructedInterpolants, 185 QuantifiedInterpolants, 4502462 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1989 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 1266/1661 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown