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/Problem11_label26_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-25 01:30:12,876 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-25 01:30:12,879 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-25 01:30:12,896 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-25 01:30:12,897 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-25 01:30:12,898 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-25 01:30:12,899 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-25 01:30:12,901 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-25 01:30:12,903 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-25 01:30:12,904 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-25 01:30:12,905 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-25 01:30:12,905 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-25 01:30:12,906 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-25 01:30:12,907 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-25 01:30:12,908 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-25 01:30:12,909 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-25 01:30:12,910 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-25 01:30:12,912 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-25 01:30:12,914 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-25 01:30:12,915 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-25 01:30:12,917 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-25 01:30:12,918 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-25 01:30:12,921 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-25 01:30:12,930 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 01:30:12,947 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-25 01:30:12,947 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-25 01:30:12,948 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-25 01:30:12,949 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-25 01:30:12,949 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-25 01:30:12,949 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-25 01:30:12,949 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-25 01:30:12,949 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-25 01:30:12,950 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-25 01:30:12,950 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-25 01:30:12,950 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-25 01:30:12,950 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-25 01:30:12,950 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-25 01:30:12,951 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-25 01:30:12,951 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-25 01:30:12,952 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-25 01:30:12,952 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-25 01:30:12,952 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-25 01:30:12,952 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-25 01:30:12,952 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-25 01:30:12,953 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-25 01:30:12,953 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-25 01:30:12,953 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-25 01:30:12,953 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-25 01:30:12,953 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-25 01:30:12,954 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-25 01:30:12,954 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-25 01:30:12,954 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-25 01:30:12,954 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-25 01:30:12,954 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-25 01:30:12,955 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-25 01:30:12,955 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-25 01:30:12,955 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-25 01:30:12,955 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-25 01:30:12,955 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-25 01:30:12,956 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-25 01:30:13,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-25 01:30:13,036 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-25 01:30:13,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-25 01:30:13,041 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-25 01:30:13,042 INFO L276 PluginConnector]: CDTParser initialized [2018-10-25 01:30:13,043 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26_true-unreach-call.c [2018-10-25 01:30:13,114 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a3905a26f/0601a3290b064ee48e971f22399725f1/FLAGf415c6eac [2018-10-25 01:30:13,800 INFO L298 CDTParser]: Found 1 translation units. [2018-10-25 01:30:13,801 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label26_true-unreach-call.c [2018-10-25 01:30:13,823 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a3905a26f/0601a3290b064ee48e971f22399725f1/FLAGf415c6eac [2018-10-25 01:30:13,847 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a3905a26f/0601a3290b064ee48e971f22399725f1 [2018-10-25 01:30:13,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-25 01:30:13,863 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-25 01:30:13,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-25 01:30:13,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-25 01:30:13,874 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-25 01:30:13,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:30:13" (1/1) ... [2018-10-25 01:30:13,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79efdec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:13, skipping insertion in model container [2018-10-25 01:30:13,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 01:30:13" (1/1) ... [2018-10-25 01:30:13,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-25 01:30:13,973 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-25 01:30:14,555 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:30:14,560 INFO L189 MainTranslator]: Completed pre-run [2018-10-25 01:30:14,734 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-25 01:30:14,756 INFO L193 MainTranslator]: Completed translation [2018-10-25 01:30:14,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14 WrapperNode [2018-10-25 01:30:14,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-25 01:30:14,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-25 01:30:14,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-25 01:30:14,759 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-25 01:30:14,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (1/1) ... [2018-10-25 01:30:14,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (1/1) ... [2018-10-25 01:30:15,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-25 01:30:15,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-25 01:30:15,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-25 01:30:15,075 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-25 01:30:15,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (1/1) ... [2018-10-25 01:30:15,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (1/1) ... [2018-10-25 01:30:15,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (1/1) ... [2018-10-25 01:30:15,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (1/1) ... [2018-10-25 01:30:15,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (1/1) ... [2018-10-25 01:30:15,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (1/1) ... [2018-10-25 01:30:15,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (1/1) ... [2018-10-25 01:30:15,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-25 01:30:15,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-25 01:30:15,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-25 01:30:15,241 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-25 01:30:15,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (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 01:30:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-25 01:30:15,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-25 01:30:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-25 01:30:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-25 01:30:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-25 01:30:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-25 01:30:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-25 01:30:15,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-25 01:30:20,448 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-25 01:30:20,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:30:20 BoogieIcfgContainer [2018-10-25 01:30:20,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-25 01:30:20,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-25 01:30:20,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-25 01:30:20,457 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-25 01:30:20,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 01:30:13" (1/3) ... [2018-10-25 01:30:20,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4751da7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:30:20, skipping insertion in model container [2018-10-25 01:30:20,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 01:30:14" (2/3) ... [2018-10-25 01:30:20,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4751da7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 01:30:20, skipping insertion in model container [2018-10-25 01:30:20,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 01:30:20" (3/3) ... [2018-10-25 01:30:20,462 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label26_true-unreach-call.c [2018-10-25 01:30:20,472 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-25 01:30:20,487 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-25 01:30:20,505 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-25 01:30:20,545 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-25 01:30:20,545 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-25 01:30:20,545 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-25 01:30:20,545 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-25 01:30:20,545 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-25 01:30:20,546 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-25 01:30:20,546 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-25 01:30:20,546 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-25 01:30:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-10-25 01:30:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-25 01:30:20,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:30:20,585 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, 1, 1, 1, 1, 1, 1] [2018-10-25 01:30:20,588 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:30:20,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:30:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash -242196732, now seen corresponding path program 1 times [2018-10-25 01:30:20,596 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:30:20,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:30:20,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:30:20,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:30:20,656 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:30:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:30:21,149 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 01:30:21,250 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 01:30:21,253 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:30:21,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-25 01:30:21,254 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:30:21,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:30:21,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:30:21,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 01:30:21,282 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-10-25 01:30:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:30:23,549 INFO L93 Difference]: Finished difference Result 782 states and 1372 transitions. [2018-10-25 01:30:23,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:30:23,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2018-10-25 01:30:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:30:23,576 INFO L225 Difference]: With dead ends: 782 [2018-10-25 01:30:23,576 INFO L226 Difference]: Without dead ends: 487 [2018-10-25 01:30:23,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-25 01:30:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-10-25 01:30:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 482. [2018-10-25 01:30:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-10-25 01:30:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 843 transitions. [2018-10-25 01:30:23,697 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 843 transitions. Word has length 46 [2018-10-25 01:30:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:30:23,698 INFO L481 AbstractCegarLoop]: Abstraction has 482 states and 843 transitions. [2018-10-25 01:30:23,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:30:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 843 transitions. [2018-10-25 01:30:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-25 01:30:23,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:30:23,716 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, 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] [2018-10-25 01:30:23,716 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:30:23,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:30:23,718 INFO L82 PathProgramCache]: Analyzing trace with hash -567234993, now seen corresponding path program 1 times [2018-10-25 01:30:23,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:30:23,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:30:23,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:30:23,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:30:23,721 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:30:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:30:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:30:24,457 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-25 01:30:24,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-25 01:30:24,457 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:30:24,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-25 01:30:24,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-25 01:30:24,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-25 01:30:24,461 INFO L87 Difference]: Start difference. First operand 482 states and 843 transitions. Second operand 7 states. [2018-10-25 01:30:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:30:31,289 INFO L93 Difference]: Finished difference Result 1760 states and 3239 transitions. [2018-10-25 01:30:31,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-25 01:30:31,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2018-10-25 01:30:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:30:31,310 INFO L225 Difference]: With dead ends: 1760 [2018-10-25 01:30:31,310 INFO L226 Difference]: Without dead ends: 1284 [2018-10-25 01:30:31,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-25 01:30:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2018-10-25 01:30:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1037. [2018-10-25 01:30:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2018-10-25 01:30:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1685 transitions. [2018-10-25 01:30:31,426 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1685 transitions. Word has length 121 [2018-10-25 01:30:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:30:31,426 INFO L481 AbstractCegarLoop]: Abstraction has 1037 states and 1685 transitions. [2018-10-25 01:30:31,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-25 01:30:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1685 transitions. [2018-10-25 01:30:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-25 01:30:31,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:30:31,439 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-25 01:30:31,439 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:30:31,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:30:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2085119040, now seen corresponding path program 1 times [2018-10-25 01:30:31,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:30:31,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:30:31,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:30:31,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:30:31,443 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:30:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:30:31,790 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-25 01:30:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 78 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-25 01:30:31,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:30:31,853 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:30:31,854 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 195 with the following transitions: [2018-10-25 01:30:31,857 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [269], [271], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [514], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-25 01:30:31,905 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:30:31,905 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:30:32,574 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 01:30:32,576 INFO L272 AbstractInterpreter]: Visited 80 different actions 80 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-10-25 01:30:32,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:30:32,628 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 01:30:33,350 INFO L232 lantSequenceWeakener]: Weakened 185 states. On average, predicates are now at 73.54% of their original sizes. [2018-10-25 01:30:33,351 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 01:30:33,613 INFO L413 sIntCurrentIteration]: We have 193 unified AI predicates [2018-10-25 01:30:33,613 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 01:30:33,614 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 01:30:33,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-10-25 01:30:33,615 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:30:33,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-25 01:30:33,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-25 01:30:33,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-25 01:30:33,616 INFO L87 Difference]: Start difference. First operand 1037 states and 1685 transitions. Second operand 6 states. [2018-10-25 01:32:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:32:25,093 INFO L93 Difference]: Finished difference Result 2260 states and 3574 transitions. [2018-10-25 01:32:25,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-25 01:32:25,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 194 [2018-10-25 01:32:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:32:25,101 INFO L225 Difference]: With dead ends: 2260 [2018-10-25 01:32:25,101 INFO L226 Difference]: Without dead ends: 1229 [2018-10-25 01:32:25,107 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 194 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-25 01:32:25,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2018-10-25 01:32:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1227. [2018-10-25 01:32:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2018-10-25 01:32:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1883 transitions. [2018-10-25 01:32:25,142 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1883 transitions. Word has length 194 [2018-10-25 01:32:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:32:25,142 INFO L481 AbstractCegarLoop]: Abstraction has 1227 states and 1883 transitions. [2018-10-25 01:32:25,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-25 01:32:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1883 transitions. [2018-10-25 01:32:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-25 01:32:25,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:32:25,147 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:25,147 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:32:25,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:32:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1893502118, now seen corresponding path program 1 times [2018-10-25 01:32:25,148 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:32:25,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:32:25,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:32:25,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:32:25,150 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:32:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:32:25,921 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-25 01:32:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 82 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:32:26,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:32:26,079 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:32:26,079 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 239 with the following transitions: [2018-10-25 01:32:26,080 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [269], [271], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-25 01:32:26,086 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:32:26,086 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:32:27,586 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-25 01:32:27,586 INFO L272 AbstractInterpreter]: Visited 126 different actions 374 times. Merged at 7 different actions 20 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 28 variables. [2018-10-25 01:32:27,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:32:27,617 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-25 01:32:27,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:32:27,618 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 01:32:27,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:32:27,628 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-25 01:32:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:32:27,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-25 01:32:30,349 WARN L179 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 1344 DAG size of output: 51 [2018-10-25 01:32:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 72 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:32:30,712 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-25 01:32:30,972 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-10-25 01:32:31,173 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2018-10-25 01:32:31,985 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-25 01:32:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-25 01:32:32,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-25 01:32:32,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 9] total 18 [2018-10-25 01:32:32,160 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:32:32,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-25 01:32:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-25 01:32:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2018-10-25 01:32:32,161 INFO L87 Difference]: Start difference. First operand 1227 states and 1883 transitions. Second operand 3 states. [2018-10-25 01:32:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-25 01:32:35,212 INFO L93 Difference]: Finished difference Result 2951 states and 4855 transitions. [2018-10-25 01:32:35,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-25 01:32:35,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2018-10-25 01:32:35,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-25 01:32:35,230 INFO L225 Difference]: With dead ends: 2951 [2018-10-25 01:32:35,230 INFO L226 Difference]: Without dead ends: 1920 [2018-10-25 01:32:35,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 470 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2018-10-25 01:32:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2018-10-25 01:32:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1745. [2018-10-25 01:32:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1745 states. [2018-10-25 01:32:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2611 transitions. [2018-10-25 01:32:35,290 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2611 transitions. Word has length 238 [2018-10-25 01:32:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-25 01:32:35,290 INFO L481 AbstractCegarLoop]: Abstraction has 1745 states and 2611 transitions. [2018-10-25 01:32:35,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-25 01:32:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2611 transitions. [2018-10-25 01:32:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-25 01:32:35,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-25 01:32:35,297 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:35,298 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-25 01:32:35,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:32:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash -583065927, now seen corresponding path program 1 times [2018-10-25 01:32:35,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-25 01:32:35,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:32:35,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-25 01:32:35,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-25 01:32:35,300 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-25 01:32:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-25 01:32:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-25 01:32:35,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-25 01:32:35,600 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-25 01:32:35,600 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 250 with the following transitions: [2018-10-25 01:32:35,601 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [269], [271], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [558], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-10-25 01:32:35,605 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-25 01:32:35,606 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-25 01:32:36,238 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-25 01:32:36,239 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-10-25 01:32:36,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-25 01:32:36,278 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-25 01:32:37,453 INFO L232 lantSequenceWeakener]: Weakened 116 states. On average, predicates are now at 74.24% of their original sizes. [2018-10-25 01:32:37,453 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-25 01:32:38,130 INFO L413 sIntCurrentIteration]: We have 248 unified AI predicates [2018-10-25 01:32:38,131 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-25 01:32:38,131 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-25 01:32:38,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [6] total 19 [2018-10-25 01:32:38,131 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-25 01:32:38,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-25 01:32:38,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-25 01:32:38,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-10-25 01:32:38,133 INFO L87 Difference]: Start difference. First operand 1745 states and 2611 transitions. Second operand 15 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown