java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label35_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:53:23,489 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:53:23,490 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:53:23,502 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:53:23,503 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:53:23,504 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:53:23,505 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:53:23,507 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:53:23,509 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:53:23,509 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:53:23,510 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:53:23,511 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:53:23,511 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:53:23,512 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:53:23,514 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:53:23,514 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:53:23,515 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:53:23,517 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:53:23,519 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:53:23,521 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:53:23,522 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:53:23,526 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:53:23,532 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:53:23,532 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:53:23,532 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:53:23,533 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:53:23,536 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:53:23,538 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:53:23,538 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:53:23,539 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:53:23,543 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:53:23,544 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:53:23,544 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:53:23,544 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:53:23,545 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:53:23,545 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:53:23,547 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 20:53:23,577 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:53:23,578 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:53:23,578 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:53:23,579 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:53:23,580 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:53:23,580 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:53:23,580 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:53:23,580 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:53:23,580 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:53:23,581 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:53:23,581 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:53:23,581 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:53:23,581 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:53:23,582 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:53:23,582 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:53:23,583 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:53:23,583 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:53:23,583 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:53:23,583 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:53:23,583 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:53:23,585 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:53:23,586 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:53:23,586 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:53:23,586 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:53:23,586 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:53:23,587 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:53:23,587 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:53:23,587 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:53:23,587 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:53:23,587 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:53:23,588 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:53:23,588 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:53:23,588 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:53:23,588 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:53:23,588 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:53:23,640 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:53:23,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:53:23,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:53:23,662 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:53:23,663 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:53:23,663 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label35_true-unreach-call.c [2018-11-07 20:53:23,729 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e83c3a2bc/697890a9ec70444592175f48337024fe/FLAGa9c47dc3f [2018-11-07 20:53:24,479 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:53:24,480 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label35_true-unreach-call.c [2018-11-07 20:53:24,496 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e83c3a2bc/697890a9ec70444592175f48337024fe/FLAGa9c47dc3f [2018-11-07 20:53:24,513 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e83c3a2bc/697890a9ec70444592175f48337024fe [2018-11-07 20:53:24,523 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:53:24,525 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:53:24,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:53:24,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:53:24,530 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:53:24,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:53:24" (1/1) ... [2018-11-07 20:53:24,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231c07b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:24, skipping insertion in model container [2018-11-07 20:53:24,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:53:24" (1/1) ... [2018-11-07 20:53:24,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:53:24,638 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:53:25,416 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:53:25,421 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:53:25,695 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:53:25,739 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:53:25,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25 WrapperNode [2018-11-07 20:53:25,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:53:25,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:53:25,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:53:25,741 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:53:25,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (1/1) ... [2018-11-07 20:53:25,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (1/1) ... [2018-11-07 20:53:25,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:53:25,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:53:25,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:53:25,964 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:53:25,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (1/1) ... [2018-11-07 20:53:25,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (1/1) ... [2018-11-07 20:53:25,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (1/1) ... [2018-11-07 20:53:25,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (1/1) ... [2018-11-07 20:53:26,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (1/1) ... [2018-11-07 20:53:26,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (1/1) ... [2018-11-07 20:53:26,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (1/1) ... [2018-11-07 20:53:26,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:53:26,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:53:26,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:53:26,080 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:53:26,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:53:26,156 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:53:26,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:53:26,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:53:26,157 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 20:53:26,157 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 20:53:26,157 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:53:26,157 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:53:26,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:53:26,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:53:26,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:53:26,158 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:53:32,530 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:53:32,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:53:32 BoogieIcfgContainer [2018-11-07 20:53:32,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:53:32,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:53:32,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:53:32,537 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:53:32,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:53:24" (1/3) ... [2018-11-07 20:53:32,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b514bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:53:32, skipping insertion in model container [2018-11-07 20:53:32,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:53:25" (2/3) ... [2018-11-07 20:53:32,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b514bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:53:32, skipping insertion in model container [2018-11-07 20:53:32,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:53:32" (3/3) ... [2018-11-07 20:53:32,542 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label35_true-unreach-call.c [2018-11-07 20:53:32,552 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:53:32,560 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:53:32,575 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:53:32,616 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:53:32,616 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:53:32,617 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:53:32,617 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:53:32,617 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:53:32,617 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:53:32,617 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:53:32,617 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:53:32,655 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 20:53:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-07 20:53:32,665 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:53:32,666 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, 1, 1] [2018-11-07 20:53:32,669 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:53:32,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:53:32,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1960867948, now seen corresponding path program 1 times [2018-11-07 20:53:32,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:53:32,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:32,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:53:32,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:32,727 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:53:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:53:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:53:33,143 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:53:33,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:53:33,144 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:53:33,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:53:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:53:33,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:53:33,172 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-11-07 20:53:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:53:38,515 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-11-07 20:53:38,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:53:38,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2018-11-07 20:53:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:53:38,547 INFO L225 Difference]: With dead ends: 1513 [2018-11-07 20:53:38,547 INFO L226 Difference]: Without dead ends: 1097 [2018-11-07 20:53:38,562 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:53:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-11-07 20:53:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 744. [2018-11-07 20:53:38,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-11-07 20:53:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1357 transitions. [2018-11-07 20:53:38,701 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1357 transitions. Word has length 48 [2018-11-07 20:53:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:53:38,752 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1357 transitions. [2018-11-07 20:53:38,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:53:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1357 transitions. [2018-11-07 20:53:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-07 20:53:38,767 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:53:38,767 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:53:38,767 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:53:38,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:53:38,773 INFO L82 PathProgramCache]: Analyzing trace with hash 321031098, now seen corresponding path program 1 times [2018-11-07 20:53:38,774 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:53:38,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:38,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:53:38,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:38,775 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:53:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:53:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:53:39,291 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:53:39,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 20:53:39,291 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:53:39,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 20:53:39,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 20:53:39,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 20:53:39,294 INFO L87 Difference]: Start difference. First operand 744 states and 1357 transitions. Second operand 5 states. [2018-11-07 20:53:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:53:43,856 INFO L93 Difference]: Finished difference Result 2196 states and 4092 transitions. [2018-11-07 20:53:43,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:53:43,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2018-11-07 20:53:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:53:43,874 INFO L225 Difference]: With dead ends: 2196 [2018-11-07 20:53:43,874 INFO L226 Difference]: Without dead ends: 1458 [2018-11-07 20:53:43,878 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:53:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2018-11-07 20:53:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1438. [2018-11-07 20:53:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2018-11-07 20:53:43,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2551 transitions. [2018-11-07 20:53:43,963 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2551 transitions. Word has length 118 [2018-11-07 20:53:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:53:43,964 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 2551 transitions. [2018-11-07 20:53:43,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 20:53:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2551 transitions. [2018-11-07 20:53:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-07 20:53:43,971 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:53:43,971 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, 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] [2018-11-07 20:53:43,971 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:53:43,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:53:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1441710001, now seen corresponding path program 1 times [2018-11-07 20:53:43,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:53:43,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:43,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:53:43,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:43,978 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:53:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:53:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:53:44,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:53:44,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:53:44,197 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:53:44,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:53:44,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:53:44,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:53:44,199 INFO L87 Difference]: Start difference. First operand 1438 states and 2551 transitions. Second operand 6 states. [2018-11-07 20:53:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:53:48,694 INFO L93 Difference]: Finished difference Result 4237 states and 7540 transitions. [2018-11-07 20:53:48,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:53:48,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2018-11-07 20:53:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:53:48,713 INFO L225 Difference]: With dead ends: 4237 [2018-11-07 20:53:48,713 INFO L226 Difference]: Without dead ends: 2805 [2018-11-07 20:53:48,723 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:53:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2018-11-07 20:53:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2785. [2018-11-07 20:53:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2785 states. [2018-11-07 20:53:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4352 transitions. [2018-11-07 20:53:48,805 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4352 transitions. Word has length 121 [2018-11-07 20:53:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:53:48,806 INFO L480 AbstractCegarLoop]: Abstraction has 2785 states and 4352 transitions. [2018-11-07 20:53:48,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:53:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4352 transitions. [2018-11-07 20:53:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-11-07 20:53:48,809 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:53:48,809 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, 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] [2018-11-07 20:53:48,809 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:53:48,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:53:48,810 INFO L82 PathProgramCache]: Analyzing trace with hash 692588274, now seen corresponding path program 1 times [2018-11-07 20:53:48,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:53:48,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:48,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:53:48,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:48,811 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:53:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:53:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:53:49,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:53:49,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:53:49,028 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:53:49,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:53:49,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:53:49,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:53:49,029 INFO L87 Difference]: Start difference. First operand 2785 states and 4352 transitions. Second operand 6 states. [2018-11-07 20:53:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:53:52,860 INFO L93 Difference]: Finished difference Result 6952 states and 11048 transitions. [2018-11-07 20:53:52,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:53:52,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2018-11-07 20:53:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:53:52,892 INFO L225 Difference]: With dead ends: 6952 [2018-11-07 20:53:52,892 INFO L226 Difference]: Without dead ends: 4173 [2018-11-07 20:53:52,908 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:53:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2018-11-07 20:53:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 4153. [2018-11-07 20:53:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4153 states. [2018-11-07 20:53:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 5896 transitions. [2018-11-07 20:53:53,020 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 5896 transitions. Word has length 122 [2018-11-07 20:53:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:53:53,020 INFO L480 AbstractCegarLoop]: Abstraction has 4153 states and 5896 transitions. [2018-11-07 20:53:53,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:53:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 5896 transitions. [2018-11-07 20:53:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-07 20:53:53,023 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:53:53,023 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, 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] [2018-11-07 20:53:53,023 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:53:53,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:53:53,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1832365575, now seen corresponding path program 1 times [2018-11-07 20:53:53,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:53:53,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:53,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:53:53,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:53,025 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:53:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:53:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:53:53,181 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:53:53,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:53:53,182 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:53:53,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:53:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:53:53,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:53:53,183 INFO L87 Difference]: Start difference. First operand 4153 states and 5896 transitions. Second operand 6 states. [2018-11-07 20:53:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:53:57,328 INFO L93 Difference]: Finished difference Result 11374 states and 16767 transitions. [2018-11-07 20:53:57,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:53:57,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-11-07 20:53:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:53:57,370 INFO L225 Difference]: With dead ends: 11374 [2018-11-07 20:53:57,370 INFO L226 Difference]: Without dead ends: 7227 [2018-11-07 20:53:57,400 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:53:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states. [2018-11-07 20:53:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7227 to 7152. [2018-11-07 20:53:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7152 states. [2018-11-07 20:53:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 9826 transitions. [2018-11-07 20:53:57,595 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 9826 transitions. Word has length 125 [2018-11-07 20:53:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:53:57,595 INFO L480 AbstractCegarLoop]: Abstraction has 7152 states and 9826 transitions. [2018-11-07 20:53:57,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:53:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 9826 transitions. [2018-11-07 20:53:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-07 20:53:57,598 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:53:57,598 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, 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] [2018-11-07 20:53:57,598 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:53:57,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:53:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash 911780215, now seen corresponding path program 1 times [2018-11-07 20:53:57,599 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:53:57,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:57,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:53:57,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:53:57,600 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:53:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:53:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:53:57,820 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:53:57,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:53:57,820 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:53:57,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:53:57,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:53:57,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:53:57,822 INFO L87 Difference]: Start difference. First operand 7152 states and 9826 transitions. Second operand 6 states. [2018-11-07 20:54:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:54:01,336 INFO L93 Difference]: Finished difference Result 17771 states and 25546 transitions. [2018-11-07 20:54:01,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:54:01,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2018-11-07 20:54:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:54:01,404 INFO L225 Difference]: With dead ends: 17771 [2018-11-07 20:54:01,404 INFO L226 Difference]: Without dead ends: 10625 [2018-11-07 20:54:01,440 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:54:01,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10625 states. [2018-11-07 20:54:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10625 to 10585. [2018-11-07 20:54:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10585 states. [2018-11-07 20:54:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 13819 transitions. [2018-11-07 20:54:01,742 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 13819 transitions. Word has length 133 [2018-11-07 20:54:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:54:01,742 INFO L480 AbstractCegarLoop]: Abstraction has 10585 states and 13819 transitions. [2018-11-07 20:54:01,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:54:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 13819 transitions. [2018-11-07 20:54:01,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-11-07 20:54:01,746 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:54:01,746 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, 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] [2018-11-07 20:54:01,746 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:54:01,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:54:01,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1008425326, now seen corresponding path program 1 times [2018-11-07 20:54:01,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:54:01,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:54:01,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:54:01,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:54:01,750 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:54:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:54:02,012 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:54:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 20:54:02,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:54:02,321 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:54:02,322 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 141 with the following transitions: [2018-11-07 20:54:02,325 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [463], [465], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:54:02,399 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:54:02,399 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:54:03,123 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:54:03,573 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:54:03,576 INFO L272 AbstractInterpreter]: Visited 99 different actions 284 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:54:03,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:54:03,622 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:54:04,176 INFO L227 lantSequenceWeakener]: Weakened 20 states. On average, predicates are now at 81.82% of their original sizes. [2018-11-07 20:54:04,177 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:54:05,486 INFO L415 sIntCurrentIteration]: We unified 139 AI predicates to 139 [2018-11-07 20:54:05,487 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:54:05,488 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:54:05,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [4] total 18 [2018-11-07 20:54:05,488 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:54:05,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 20:54:05,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 20:54:05,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-11-07 20:54:05,489 INFO L87 Difference]: Start difference. First operand 10585 states and 13819 transitions. Second operand 16 states. [2018-11-07 20:54:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:54:39,894 INFO L93 Difference]: Finished difference Result 23539 states and 30476 transitions. [2018-11-07 20:54:39,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:54:39,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 140 [2018-11-07 20:54:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:54:39,934 INFO L225 Difference]: With dead ends: 23539 [2018-11-07 20:54:39,934 INFO L226 Difference]: Without dead ends: 12960 [2018-11-07 20:54:39,968 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 148 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-11-07 20:54:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12960 states. [2018-11-07 20:54:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12960 to 12820. [2018-11-07 20:54:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12820 states. [2018-11-07 20:54:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12820 states to 12820 states and 16153 transitions. [2018-11-07 20:54:40,232 INFO L78 Accepts]: Start accepts. Automaton has 12820 states and 16153 transitions. Word has length 140 [2018-11-07 20:54:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:54:40,232 INFO L480 AbstractCegarLoop]: Abstraction has 12820 states and 16153 transitions. [2018-11-07 20:54:40,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 20:54:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 12820 states and 16153 transitions. [2018-11-07 20:54:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-11-07 20:54:40,235 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:54:40,235 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, 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] [2018-11-07 20:54:40,236 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:54:40,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:54:40,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1802724966, now seen corresponding path program 1 times [2018-11-07 20:54:40,236 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:54:40,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:54:40,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:54:40,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:54:40,238 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:54:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:54:40,521 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:54:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 20:54:40,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:54:40,727 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:54:40,727 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 177 with the following transitions: [2018-11-07 20:54:40,730 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [463], [465], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [904], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:54:40,743 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:54:40,743 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:54:40,822 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:54:41,163 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:54:41,163 INFO L272 AbstractInterpreter]: Visited 135 different actions 392 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:54:41,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:54:41,181 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:54:41,522 INFO L227 lantSequenceWeakener]: Weakened 20 states. On average, predicates are now at 81.82% of their original sizes. [2018-11-07 20:54:41,523 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:54:41,994 INFO L415 sIntCurrentIteration]: We unified 175 AI predicates to 175 [2018-11-07 20:54:41,994 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:54:41,994 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:54:41,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [4] total 18 [2018-11-07 20:54:41,994 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:54:41,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 20:54:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 20:54:41,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-11-07 20:54:41,996 INFO L87 Difference]: Start difference. First operand 12820 states and 16153 transitions. Second operand 16 states. [2018-11-07 20:55:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:55:11,081 INFO L93 Difference]: Finished difference Result 26040 states and 33051 transitions. [2018-11-07 20:55:11,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-07 20:55:11,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 176 [2018-11-07 20:55:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:55:11,127 INFO L225 Difference]: With dead ends: 26040 [2018-11-07 20:55:11,127 INFO L226 Difference]: Without dead ends: 14583 [2018-11-07 20:55:11,151 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 184 GetRequests, 156 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2018-11-07 20:55:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14583 states. [2018-11-07 20:55:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14583 to 14441. [2018-11-07 20:55:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14441 states. [2018-11-07 20:55:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14441 states to 14441 states and 17889 transitions. [2018-11-07 20:55:11,440 INFO L78 Accepts]: Start accepts. Automaton has 14441 states and 17889 transitions. Word has length 176 [2018-11-07 20:55:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:55:11,440 INFO L480 AbstractCegarLoop]: Abstraction has 14441 states and 17889 transitions. [2018-11-07 20:55:11,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 20:55:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 14441 states and 17889 transitions. [2018-11-07 20:55:11,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-11-07 20:55:11,457 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:55:11,457 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:55:11,458 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:55:11,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:11,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1605093304, now seen corresponding path program 1 times [2018-11-07 20:55:11,458 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:55:11,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:11,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:55:11,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:11,460 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:55:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:55:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-11-07 20:55:11,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:55:11,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:55:11,918 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:55:11,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:55:11,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:55:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:55:11,919 INFO L87 Difference]: Start difference. First operand 14441 states and 17889 transitions. Second operand 4 states. [2018-11-07 20:55:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:55:17,414 INFO L93 Difference]: Finished difference Result 36093 states and 46620 transitions. [2018-11-07 20:55:17,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:55:17,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 412 [2018-11-07 20:55:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:55:17,488 INFO L225 Difference]: With dead ends: 36093 [2018-11-07 20:55:17,488 INFO L226 Difference]: Without dead ends: 23750 [2018-11-07 20:55:17,528 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:55:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23750 states. [2018-11-07 20:55:17,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23750 to 23747. [2018-11-07 20:55:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23747 states. [2018-11-07 20:55:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23747 states to 23747 states and 28950 transitions. [2018-11-07 20:55:17,925 INFO L78 Accepts]: Start accepts. Automaton has 23747 states and 28950 transitions. Word has length 412 [2018-11-07 20:55:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:55:17,926 INFO L480 AbstractCegarLoop]: Abstraction has 23747 states and 28950 transitions. [2018-11-07 20:55:17,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:55:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 23747 states and 28950 transitions. [2018-11-07 20:55:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2018-11-07 20:55:17,943 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:55:17,943 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:55:17,944 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:55:17,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash -934901087, now seen corresponding path program 1 times [2018-11-07 20:55:17,944 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:55:17,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:17,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:55:17,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:17,945 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:55:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:55:18,420 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 20:55:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 65 proven. 175 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:55:19,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:55:19,240 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:55:19,240 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 452 with the following transitions: [2018-11-07 20:55:19,241 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [463], [465], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1044], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:55:19,249 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:55:19,250 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:55:19,772 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:55:19,772 INFO L272 AbstractInterpreter]: Visited 248 different actions 492 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:55:19,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:19,811 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:55:20,551 INFO L227 lantSequenceWeakener]: Weakened 79 states. On average, predicates are now at 79.48% of their original sizes. [2018-11-07 20:55:20,551 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:55:22,879 INFO L415 sIntCurrentIteration]: We unified 450 AI predicates to 450 [2018-11-07 20:55:22,879 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:55:22,879 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:55:22,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [5] total 23 [2018-11-07 20:55:22,879 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:55:22,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:55:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:55:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:55:22,881 INFO L87 Difference]: Start difference. First operand 23747 states and 28950 transitions. Second operand 20 states. [2018-11-07 20:55:26,124 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:55:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:55:48,909 INFO L93 Difference]: Finished difference Result 46032 states and 56515 transitions. [2018-11-07 20:55:48,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-07 20:55:48,909 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 451 [2018-11-07 20:55:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:55:48,986 INFO L225 Difference]: With dead ends: 46032 [2018-11-07 20:55:48,987 INFO L226 Difference]: Without dead ends: 24383 [2018-11-07 20:55:49,039 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 462 GetRequests, 356 SyntacticMatches, 76 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2018-11-07 20:55:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24383 states. [2018-11-07 20:55:49,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24383 to 24378. [2018-11-07 20:55:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24378 states. [2018-11-07 20:55:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24378 states to 24378 states and 29619 transitions. [2018-11-07 20:55:49,473 INFO L78 Accepts]: Start accepts. Automaton has 24378 states and 29619 transitions. Word has length 451 [2018-11-07 20:55:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:55:49,474 INFO L480 AbstractCegarLoop]: Abstraction has 24378 states and 29619 transitions. [2018-11-07 20:55:49,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:55:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 24378 states and 29619 transitions. [2018-11-07 20:55:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-11-07 20:55:49,503 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:55:49,504 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:55:49,504 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:55:49,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:49,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2005669471, now seen corresponding path program 1 times [2018-11-07 20:55:49,505 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:55:49,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:49,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:55:49,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:55:49,506 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:55:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:55:50,373 WARN L179 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 20:55:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 218 proven. 162 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-07 20:55:56,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:55:56,251 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:55:56,251 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 544 with the following transitions: [2018-11-07 20:55:56,251 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [463], [465], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1044], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:55:56,257 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:55:56,258 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:55:56,342 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:55:57,102 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:55:57,102 INFO L272 AbstractInterpreter]: Visited 249 different actions 991 times. Merged at 7 different actions 28 times. Never widened. Found 5 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 20:55:57,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:55:57,108 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:55:57,548 INFO L227 lantSequenceWeakener]: Weakened 540 states. On average, predicates are now at 77.56% of their original sizes. [2018-11-07 20:55:57,548 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:55:57,639 INFO L415 sIntCurrentIteration]: We unified 542 AI predicates to 542 [2018-11-07 20:55:57,639 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:55:57,640 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:55:57,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2018-11-07 20:55:57,640 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:55:57,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:55:57,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:55:57,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:55:57,641 INFO L87 Difference]: Start difference. First operand 24378 states and 29619 transitions. Second operand 10 states. [2018-11-07 20:56:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:56:07,142 INFO L93 Difference]: Finished difference Result 47984 states and 58616 transitions. [2018-11-07 20:56:07,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:56:07,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 543 [2018-11-07 20:56:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:56:07,202 INFO L225 Difference]: With dead ends: 47984 [2018-11-07 20:56:07,202 INFO L226 Difference]: Without dead ends: 26335 [2018-11-07 20:56:07,244 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 550 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 20:56:07,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26335 states. [2018-11-07 20:56:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26335 to 26318. [2018-11-07 20:56:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26318 states. [2018-11-07 20:56:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26318 states to 26318 states and 31644 transitions. [2018-11-07 20:56:07,652 INFO L78 Accepts]: Start accepts. Automaton has 26318 states and 31644 transitions. Word has length 543 [2018-11-07 20:56:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:56:07,653 INFO L480 AbstractCegarLoop]: Abstraction has 26318 states and 31644 transitions. [2018-11-07 20:56:07,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:56:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 26318 states and 31644 transitions. [2018-11-07 20:56:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2018-11-07 20:56:07,681 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:56:07,682 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:56:07,682 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:56:07,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:07,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1254393274, now seen corresponding path program 1 times [2018-11-07 20:56:07,683 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:56:07,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:07,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:56:07,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:07,684 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:56:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:56:08,135 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 20:56:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 89 proven. 288 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-11-07 20:56:09,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:56:09,650 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:56:09,650 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 561 with the following transitions: [2018-11-07 20:56:09,651 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [463], [465], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1044], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:56:09,660 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:56:09,661 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:56:09,718 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:56:11,615 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:56:11,615 INFO L272 AbstractInterpreter]: Visited 257 different actions 2301 times. Merged at 8 different actions 76 times. Widened at 1 different actions 4 times. Found 16 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:56:11,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:11,628 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:56:12,108 INFO L227 lantSequenceWeakener]: Weakened 557 states. On average, predicates are now at 77.55% of their original sizes. [2018-11-07 20:56:12,109 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:56:12,456 INFO L415 sIntCurrentIteration]: We unified 559 AI predicates to 559 [2018-11-07 20:56:12,456 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:56:12,457 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:56:12,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2018-11-07 20:56:12,457 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:56:12,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:56:12,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:56:12,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:56:12,458 INFO L87 Difference]: Start difference. First operand 26318 states and 31644 transitions. Second operand 10 states. [2018-11-07 20:56:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:56:22,510 INFO L93 Difference]: Finished difference Result 52317 states and 63461 transitions. [2018-11-07 20:56:22,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:56:22,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 560 [2018-11-07 20:56:22,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:56:22,578 INFO L225 Difference]: With dead ends: 52317 [2018-11-07 20:56:22,578 INFO L226 Difference]: Without dead ends: 28728 [2018-11-07 20:56:22,622 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 567 GetRequests, 515 SyntacticMatches, 36 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 20:56:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28728 states. [2018-11-07 20:56:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28728 to 28362. [2018-11-07 20:56:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28362 states. [2018-11-07 20:56:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28362 states to 28362 states and 34001 transitions. [2018-11-07 20:56:23,067 INFO L78 Accepts]: Start accepts. Automaton has 28362 states and 34001 transitions. Word has length 560 [2018-11-07 20:56:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:56:23,069 INFO L480 AbstractCegarLoop]: Abstraction has 28362 states and 34001 transitions. [2018-11-07 20:56:23,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:56:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 28362 states and 34001 transitions. [2018-11-07 20:56:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2018-11-07 20:56:23,093 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:56:23,093 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:56:23,094 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:56:23,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:23,094 INFO L82 PathProgramCache]: Analyzing trace with hash -783402624, now seen corresponding path program 1 times [2018-11-07 20:56:23,094 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:56:23,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:23,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:56:23,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:23,096 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:56:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:56:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 408 proven. 321 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-11-07 20:56:24,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:56:24,504 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:56:24,505 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 661 with the following transitions: [2018-11-07 20:56:24,505 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [463], [465], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [924], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:56:24,508 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:56:24,508 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:56:24,585 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:56:26,826 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:56:26,827 INFO L272 AbstractInterpreter]: Visited 258 different actions 2308 times. Merged at 9 different actions 74 times. Widened at 1 different actions 4 times. Found 16 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:56:26,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:26,835 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:56:27,355 INFO L227 lantSequenceWeakener]: Weakened 657 states. On average, predicates are now at 80.29% of their original sizes. [2018-11-07 20:56:27,356 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:56:27,462 INFO L415 sIntCurrentIteration]: We unified 659 AI predicates to 659 [2018-11-07 20:56:27,463 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:56:27,463 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:56:27,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2018-11-07 20:56:27,463 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:56:27,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:56:27,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:56:27,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:56:27,464 INFO L87 Difference]: Start difference. First operand 28362 states and 34001 transitions. Second operand 10 states. [2018-11-07 20:56:41,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:56:41,770 INFO L93 Difference]: Finished difference Result 56671 states and 68190 transitions. [2018-11-07 20:56:41,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:56:41,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 660 [2018-11-07 20:56:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:56:41,844 INFO L225 Difference]: With dead ends: 56671 [2018-11-07 20:56:41,844 INFO L226 Difference]: Without dead ends: 31038 [2018-11-07 20:56:41,890 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 667 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 20:56:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31038 states. [2018-11-07 20:56:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31038 to 30979. [2018-11-07 20:56:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30979 states. [2018-11-07 20:56:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30979 states to 30979 states and 36743 transitions. [2018-11-07 20:56:42,294 INFO L78 Accepts]: Start accepts. Automaton has 30979 states and 36743 transitions. Word has length 660 [2018-11-07 20:56:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:56:42,296 INFO L480 AbstractCegarLoop]: Abstraction has 30979 states and 36743 transitions. [2018-11-07 20:56:42,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:56:42,296 INFO L276 IsEmpty]: Start isEmpty. Operand 30979 states and 36743 transitions. [2018-11-07 20:56:42,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 905 [2018-11-07 20:56:42,353 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:56:42,353 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:56:42,354 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:56:42,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash -841375022, now seen corresponding path program 1 times [2018-11-07 20:56:42,354 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:56:42,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:42,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:56:42,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:56:42,356 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:56:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:56:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 459 proven. 544 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2018-11-07 20:56:44,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:56:44,852 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:56:44,853 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 905 with the following transitions: [2018-11-07 20:56:44,853 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [463], [465], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [972], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1320], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 20:56:44,856 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:56:44,857 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:56:44,954 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:56:48,534 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:56:48,534 INFO L272 AbstractInterpreter]: Visited 260 different actions 3893 times. Merged at 10 different actions 158 times. Widened at 1 different actions 10 times. Found 41 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:56:48,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:56:48,548 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:56:48,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:56:48,548 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 20:56:48,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:56:48,559 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:56:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:56:48,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:56:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 1151 proven. 2 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-11-07 20:56:49,732 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:56:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 600 proven. 144 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2018-11-07 20:56:50,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:56:50,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 16 [2018-11-07 20:56:50,937 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:56:50,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 20:56:50,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 20:56:50,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2018-11-07 20:56:50,940 INFO L87 Difference]: Start difference. First operand 30979 states and 36743 transitions. Second operand 15 states. Received shutdown request... [2018-11-07 20:56:59,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 20:56:59,920 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:56:59,925 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:56:59,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:56:59 BoogieIcfgContainer [2018-11-07 20:56:59,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:56:59,927 INFO L168 Benchmark]: Toolchain (without parser) took 215403.07 ms. Allocated memory was 1.5 GB in the beginning and 5.0 GB in the end (delta: 3.4 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -908.9 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-11-07 20:56:59,928 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:56:59,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1214.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-07 20:56:59,935 INFO L168 Benchmark]: Boogie Procedure Inliner took 222.93 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -878.0 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-11-07 20:56:59,938 INFO L168 Benchmark]: Boogie Preprocessor took 114.79 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:56:59,938 INFO L168 Benchmark]: RCFGBuilder took 6451.53 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 272.1 MB). Peak memory consumption was 272.1 MB. Max. memory is 7.1 GB. [2018-11-07 20:56:59,939 INFO L168 Benchmark]: TraceAbstraction took 207394.56 ms. Allocated memory was 2.3 GB in the beginning and 5.0 GB in the end (delta: 2.7 GB). Free memory was 1.9 GB in the beginning and 2.3 GB in the end (delta: -387.5 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-11-07 20:56:59,944 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1214.27 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 222.93 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 743.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -878.0 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.79 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 6451.53 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 272.1 MB). Peak memory consumption was 272.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207394.56 ms. Allocated memory was 2.3 GB in the beginning and 5.0 GB in the end (delta: 2.7 GB). Free memory was 1.9 GB in the beginning and 2.3 GB in the end (delta: -387.5 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 130]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 130). Cancelled while BasicCegarLoop was constructing difference of abstraction (30979states) and FLOYD_HOARE automaton (currently 33 states, 15 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 45 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 207.3s OverallTime, 14 OverallIterations, 6 TraceHistogramMax, 164.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2979 SDtfs, 33448 SDslu, 2195 SDs, 0 SdLazy, 40099 SolverSat, 5968 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 70.5s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 4510 GetRequests, 4173 SyntacticMatches, 131 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30979occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 11.1s AbstIntTime, 7 AbstIntIterations, 6 AbstIntStrong, 0.9980088826248075 AbsIntWeakeningRatio, 0.06656101426307448 AbsIntAvgWeakeningVarsNumRemoved, 18.510301109350237 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 13 MinimizatonAttempts, 1260 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 5417 NumberOfCodeBlocks, 5417 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 6305 ConstructedInterpolants, 0 QuantifiedInterpolants, 20726484 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1208 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 5409/7119 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown