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/Problem14_label04_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 19:02:20,426 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 19:02:20,428 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 19:02:20,441 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 19:02:20,442 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 19:02:20,443 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 19:02:20,444 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 19:02:20,446 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 19:02:20,448 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 19:02:20,450 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 19:02:20,451 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 19:02:20,452 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 19:02:20,453 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 19:02:20,455 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 19:02:20,457 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 19:02:20,457 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 19:02:20,458 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 19:02:20,462 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 19:02:20,471 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 19:02:20,475 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 19:02:20,476 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 19:02:20,477 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 19:02:20,483 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 19:02:20,483 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 19:02:20,483 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 19:02:20,484 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 19:02:20,486 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 19:02:20,487 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 19:02:20,490 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 19:02:20,491 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 19:02:20,491 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 19:02:20,492 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-12 19:02:20,497 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 [2018-11-12 19:02:20,520 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 19:02:20,521 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 19:02:20,521 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 19:02:20,522 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 19:02:20,522 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 19:02:20,522 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 19:02:20,522 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 19:02:20,522 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 19:02:20,523 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 19:02:20,523 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 19:02:20,523 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 19:02:20,523 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 19:02:20,523 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 19:02:20,524 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 19:02:20,524 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 19:02:20,524 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 19:02:20,525 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 19:02:20,525 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 19:02:20,525 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 19:02:20,525 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 19:02:20,525 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 19:02:20,526 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 19:02:20,526 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 19:02:20,526 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 19:02:20,526 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 19:02:20,526 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:02:20,527 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 19:02:20,527 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 19:02:20,527 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 19:02:20,527 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 19:02:20,527 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 19:02:20,528 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 19:02:20,528 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 19:02:20,528 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 19:02:20,528 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 19:02:20,573 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 19:02:20,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 19:02:20,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 19:02:20,596 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 19:02:20,596 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 19:02:20,597 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c [2018-11-12 19:02:20,668 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d70f201a2/713a7ff439fe496896c3edb809b48cef/FLAG9b35251aa [2018-11-12 19:02:21,300 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 19:02:21,303 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label04_true-unreach-call_false-termination.c [2018-11-12 19:02:21,323 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d70f201a2/713a7ff439fe496896c3edb809b48cef/FLAG9b35251aa [2018-11-12 19:02:21,344 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d70f201a2/713a7ff439fe496896c3edb809b48cef [2018-11-12 19:02:21,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 19:02:21,360 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 19:02:21,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 19:02:21,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 19:02:21,367 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 19:02:21,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:02:21" (1/1) ... [2018-11-12 19:02:21,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1747d2e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:21, skipping insertion in model container [2018-11-12 19:02:21,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:02:21" (1/1) ... [2018-11-12 19:02:21,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 19:02:21,468 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 19:02:22,076 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:02:22,082 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 19:02:22,256 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:02:22,276 INFO L193 MainTranslator]: Completed translation [2018-11-12 19:02:22,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22 WrapperNode [2018-11-12 19:02:22,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 19:02:22,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 19:02:22,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 19:02:22,278 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 19:02:22,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (1/1) ... [2018-11-12 19:02:22,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (1/1) ... [2018-11-12 19:02:22,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 19:02:22,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 19:02:22,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 19:02:22,410 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 19:02:22,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (1/1) ... [2018-11-12 19:02:22,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (1/1) ... [2018-11-12 19:02:22,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (1/1) ... [2018-11-12 19:02:22,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (1/1) ... [2018-11-12 19:02:22,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (1/1) ... [2018-11-12 19:02:22,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (1/1) ... [2018-11-12 19:02:22,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (1/1) ... [2018-11-12 19:02:22,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 19:02:22,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 19:02:22,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 19:02:22,524 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 19:02:22,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (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 [2018-11-12 19:02:22,598 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 19:02:22,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 19:02:22,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 19:02:22,599 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 19:02:22,599 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 19:02:22,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 19:02:22,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 19:02:22,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 19:02:22,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 19:02:25,990 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 19:02:25,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:02:25 BoogieIcfgContainer [2018-11-12 19:02:25,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 19:02:25,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 19:02:25,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 19:02:25,996 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 19:02:25,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:02:21" (1/3) ... [2018-11-12 19:02:25,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc5891d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:02:25, skipping insertion in model container [2018-11-12 19:02:25,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:02:22" (2/3) ... [2018-11-12 19:02:25,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc5891d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:02:25, skipping insertion in model container [2018-11-12 19:02:25,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:02:25" (3/3) ... [2018-11-12 19:02:26,000 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label04_true-unreach-call_false-termination.c [2018-11-12 19:02:26,010 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 19:02:26,020 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 19:02:26,038 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 19:02:26,076 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 19:02:26,076 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 19:02:26,076 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 19:02:26,077 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 19:02:26,077 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 19:02:26,077 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 19:02:26,077 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 19:02:26,077 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 19:02:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 19:02:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-12 19:02:26,117 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:02:26,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:02:26,121 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:02:26,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash -670280511, now seen corresponding path program 1 times [2018-11-12 19:02:26,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:02:26,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:26,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:02:26,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:26,188 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:02:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:02:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:02:26,642 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:02:26,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 19:02:26,642 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:02:26,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 19:02:26,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 19:02:26,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:02:26,670 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-12 19:02:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:02:28,373 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-12 19:02:28,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 19:02:28,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2018-11-12 19:02:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:02:28,395 INFO L225 Difference]: With dead ends: 691 [2018-11-12 19:02:28,396 INFO L226 Difference]: Without dead ends: 434 [2018-11-12 19:02:28,404 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:02:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-12 19:02:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-12 19:02:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-12 19:02:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-12 19:02:28,511 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 59 [2018-11-12 19:02:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:02:28,511 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-12 19:02:28,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 19:02:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-12 19:02:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-12 19:02:28,520 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:02:28,520 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, 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] [2018-11-12 19:02:28,520 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:02:28,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2036233980, now seen corresponding path program 1 times [2018-11-12 19:02:28,521 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:02:28,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:28,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:02:28,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:28,523 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:02:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:02:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:02:28,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:02:28,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 19:02:28,832 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:02:28,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 19:02:28,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 19:02:28,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 19:02:28,837 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-12 19:02:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:02:32,407 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-11-12 19:02:32,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:02:32,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2018-11-12 19:02:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:02:32,422 INFO L225 Difference]: With dead ends: 1588 [2018-11-12 19:02:32,422 INFO L226 Difference]: Without dead ends: 1160 [2018-11-12 19:02:32,427 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 [2018-11-12 19:02:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-11-12 19:02:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-11-12 19:02:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-11-12 19:02:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-11-12 19:02:32,496 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 129 [2018-11-12 19:02:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:02:32,497 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-11-12 19:02:32,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 19:02:32,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-11-12 19:02:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-11-12 19:02:32,501 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:02:32,501 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, 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] [2018-11-12 19:02:32,502 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:02:32,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:32,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1284385993, now seen corresponding path program 1 times [2018-11-12 19:02:32,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:02:32,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:32,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:02:32,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:32,504 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:02:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:02:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:02:32,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:02:32,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 19:02:32,711 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:02:32,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 19:02:32,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 19:02:32,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 19:02:32,713 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-11-12 19:02:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:02:35,205 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-11-12 19:02:35,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:02:35,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2018-11-12 19:02:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:02:35,223 INFO L225 Difference]: With dead ends: 2716 [2018-11-12 19:02:35,223 INFO L226 Difference]: Without dead ends: 1569 [2018-11-12 19:02:35,231 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:02:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-11-12 19:02:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-11-12 19:02:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-11-12 19:02:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-11-12 19:02:35,300 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 130 [2018-11-12 19:02:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:02:35,300 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-11-12 19:02:35,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 19:02:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-11-12 19:02:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-12 19:02:35,303 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:02:35,303 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, 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] [2018-11-12 19:02:35,303 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:02:35,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:35,306 INFO L82 PathProgramCache]: Analyzing trace with hash 516676699, now seen corresponding path program 1 times [2018-11-12 19:02:35,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:02:35,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:35,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:02:35,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:35,307 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:02:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:02:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:02:35,513 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:02:35,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 19:02:35,513 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:02:35,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 19:02:35,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 19:02:35,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 19:02:35,515 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-11-12 19:02:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:02:37,897 INFO L93 Difference]: Finished difference Result 4198 states and 6461 transitions. [2018-11-12 19:02:37,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-12 19:02:37,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2018-11-12 19:02:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:02:37,914 INFO L225 Difference]: With dead ends: 4198 [2018-11-12 19:02:37,914 INFO L226 Difference]: Without dead ends: 2666 [2018-11-12 19:02:37,925 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:02:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2018-11-12 19:02:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2560. [2018-11-12 19:02:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2560 states. [2018-11-12 19:02:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3629 transitions. [2018-11-12 19:02:38,008 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3629 transitions. Word has length 132 [2018-11-12 19:02:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:02:38,009 INFO L480 AbstractCegarLoop]: Abstraction has 2560 states and 3629 transitions. [2018-11-12 19:02:38,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 19:02:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3629 transitions. [2018-11-12 19:02:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-12 19:02:38,012 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:02:38,013 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, 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] [2018-11-12 19:02:38,013 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:02:38,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2124514756, now seen corresponding path program 1 times [2018-11-12 19:02:38,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:02:38,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:38,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:02:38,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:38,015 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:02:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:02:38,291 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-11-12 19:02:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:02:38,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:02:38,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 19:02:38,401 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:02:38,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 19:02:38,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 19:02:38,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-12 19:02:38,403 INFO L87 Difference]: Start difference. First operand 2560 states and 3629 transitions. Second operand 7 states. [2018-11-12 19:02:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:02:42,252 INFO L93 Difference]: Finished difference Result 6192 states and 9105 transitions. [2018-11-12 19:02:42,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 19:02:42,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2018-11-12 19:02:42,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:02:42,273 INFO L225 Difference]: With dead ends: 6192 [2018-11-12 19:02:42,273 INFO L226 Difference]: Without dead ends: 3638 [2018-11-12 19:02:42,291 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-11-12 19:02:42,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2018-11-12 19:02:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 3084. [2018-11-12 19:02:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3084 states. [2018-11-12 19:02:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 4281 transitions. [2018-11-12 19:02:42,386 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 4281 transitions. Word has length 133 [2018-11-12 19:02:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:02:42,387 INFO L480 AbstractCegarLoop]: Abstraction has 3084 states and 4281 transitions. [2018-11-12 19:02:42,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 19:02:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 4281 transitions. [2018-11-12 19:02:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-12 19:02:42,394 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:02:42,394 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:02:42,395 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:02:42,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:42,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1486188283, now seen corresponding path program 1 times [2018-11-12 19:02:42,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:02:42,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:42,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:02:42,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:42,397 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:02:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:02:42,726 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-12 19:02:43,193 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-12 19:02:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:02:43,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:02:43,676 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:02:43,677 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2018-11-12 19:02:43,681 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:02:43,726 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:02:43,726 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:02:44,243 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:02:44,331 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:02:44,335 INFO L272 AbstractInterpreter]: Visited 89 different actions 89 times. Never merged. Never widened. Performed 728 root evaluator evaluations with a maximum evaluation depth of 6. Performed 728 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 19:02:44,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:44,379 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:02:44,932 INFO L227 lantSequenceWeakener]: Weakened 208 states. On average, predicates are now at 78.15% of their original sizes. [2018-11-12 19:02:44,932 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:02:45,301 INFO L415 sIntCurrentIteration]: We unified 216 AI predicates to 216 [2018-11-12 19:02:45,301 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:02:45,302 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:02:45,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2018-11-12 19:02:45,302 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:02:45,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 19:02:45,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 19:02:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 19:02:45,304 INFO L87 Difference]: Start difference. First operand 3084 states and 4281 transitions. Second operand 7 states. [2018-11-12 19:02:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:02:55,461 INFO L93 Difference]: Finished difference Result 6347 states and 8777 transitions. [2018-11-12 19:02:55,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:02:55,461 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2018-11-12 19:02:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:02:55,475 INFO L225 Difference]: With dead ends: 6347 [2018-11-12 19:02:55,475 INFO L226 Difference]: Without dead ends: 3269 [2018-11-12 19:02:55,487 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 217 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:02:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2018-11-12 19:02:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 3267. [2018-11-12 19:02:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3267 states. [2018-11-12 19:02:55,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4472 transitions. [2018-11-12 19:02:55,561 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4472 transitions. Word has length 217 [2018-11-12 19:02:55,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:02:55,562 INFO L480 AbstractCegarLoop]: Abstraction has 3267 states and 4472 transitions. [2018-11-12 19:02:55,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 19:02:55,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4472 transitions. [2018-11-12 19:02:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-11-12 19:02:55,572 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:02:55,572 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:02:55,573 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:02:55,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1576427027, now seen corresponding path program 1 times [2018-11-12 19:02:55,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:02:55,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:55,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:02:55,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:02:55,574 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:02:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:02:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 243 proven. 140 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:02:56,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:02:56,304 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:02:56,304 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 303 with the following transitions: [2018-11-12 19:02:56,305 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:02:56,310 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:02:56,310 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:02:56,367 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:02:56,543 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:02:56,543 INFO L272 AbstractInterpreter]: Visited 94 different actions 181 times. Merged at 4 different actions 4 times. Never widened. Performed 1735 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1735 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:02:56,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:02:56,579 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:02:57,150 INFO L227 lantSequenceWeakener]: Weakened 111 states. On average, predicates are now at 78.13% of their original sizes. [2018-11-12 19:02:57,150 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:02:58,451 INFO L415 sIntCurrentIteration]: We unified 301 AI predicates to 301 [2018-11-12 19:02:58,452 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:02:58,452 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:02:58,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [12] total 33 [2018-11-12 19:02:58,453 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:02:58,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-12 19:02:58,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-12 19:02:58,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2018-11-12 19:02:58,455 INFO L87 Difference]: Start difference. First operand 3267 states and 4472 transitions. Second operand 23 states. [2018-11-12 19:03:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:03:22,844 INFO L93 Difference]: Finished difference Result 8108 states and 10802 transitions. [2018-11-12 19:03:22,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 19:03:22,844 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 302 [2018-11-12 19:03:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:03:22,862 INFO L225 Difference]: With dead ends: 8108 [2018-11-12 19:03:22,863 INFO L226 Difference]: Without dead ends: 5030 [2018-11-12 19:03:22,874 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 311 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2018-11-12 19:03:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2018-11-12 19:03:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 4656. [2018-11-12 19:03:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4656 states. [2018-11-12 19:03:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 5948 transitions. [2018-11-12 19:03:22,976 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 5948 transitions. Word has length 302 [2018-11-12 19:03:22,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:03:22,976 INFO L480 AbstractCegarLoop]: Abstraction has 4656 states and 5948 transitions. [2018-11-12 19:03:22,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-12 19:03:22,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 5948 transitions. [2018-11-12 19:03:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-11-12 19:03:22,989 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:03:22,989 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, 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, 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] [2018-11-12 19:03:22,989 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:03:22,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:03:22,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1094759873, now seen corresponding path program 1 times [2018-11-12 19:03:22,990 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:03:22,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:03:22,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:03:22,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:03:22,991 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:03:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:03:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 215 proven. 119 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-11-12 19:03:23,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:03:23,515 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:03:23,515 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 329 with the following transitions: [2018-11-12 19:03:23,516 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:03:23,520 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:03:23,520 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:03:23,555 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:03:23,675 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:03:23,675 INFO L272 AbstractInterpreter]: Visited 120 different actions 234 times. Merged at 5 different actions 5 times. Never widened. Performed 2149 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2149 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:03:23,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:03:23,676 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:03:24,000 INFO L227 lantSequenceWeakener]: Weakened 214 states. On average, predicates are now at 78.42% of their original sizes. [2018-11-12 19:03:24,001 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:03:24,294 INFO L415 sIntCurrentIteration]: We unified 327 AI predicates to 327 [2018-11-12 19:03:24,294 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:03:24,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:03:24,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [8] total 24 [2018-11-12 19:03:24,295 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:03:24,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 19:03:24,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 19:03:24,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-11-12 19:03:24,297 INFO L87 Difference]: Start difference. First operand 4656 states and 5948 transitions. Second operand 18 states. [2018-11-12 19:03:40,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:03:40,858 INFO L93 Difference]: Finished difference Result 8107 states and 10668 transitions. [2018-11-12 19:03:40,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 19:03:40,858 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 328 [2018-11-12 19:03:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:03:40,877 INFO L225 Difference]: With dead ends: 8107 [2018-11-12 19:03:40,877 INFO L226 Difference]: Without dead ends: 5029 [2018-11-12 19:03:40,889 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 347 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2018-11-12 19:03:40,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2018-11-12 19:03:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 5024. [2018-11-12 19:03:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5024 states. [2018-11-12 19:03:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5024 states to 5024 states and 6344 transitions. [2018-11-12 19:03:41,000 INFO L78 Accepts]: Start accepts. Automaton has 5024 states and 6344 transitions. Word has length 328 [2018-11-12 19:03:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:03:41,001 INFO L480 AbstractCegarLoop]: Abstraction has 5024 states and 6344 transitions. [2018-11-12 19:03:41,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 19:03:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 5024 states and 6344 transitions. [2018-11-12 19:03:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-11-12 19:03:41,014 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:03:41,015 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, 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, 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] [2018-11-12 19:03:41,015 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:03:41,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:03:41,015 INFO L82 PathProgramCache]: Analyzing trace with hash -800546699, now seen corresponding path program 1 times [2018-11-12 19:03:41,016 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:03:41,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:03:41,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:03:41,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:03:41,021 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:03:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:03:41,527 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:03:41,729 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:03:41,953 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:03:42,446 WARN L179 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-12 19:03:43,036 WARN L179 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-12 19:03:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 169 proven. 214 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:03:44,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:03:44,137 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:03:44,137 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 339 with the following transitions: [2018-11-12 19:03:44,138 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [698], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:03:44,142 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:03:44,142 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:03:44,185 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:03:44,350 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:03:44,350 INFO L272 AbstractInterpreter]: Visited 130 different actions 253 times. Merged at 4 different actions 4 times. Never widened. Performed 3335 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3335 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:03:44,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:03:44,365 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:03:44,760 INFO L227 lantSequenceWeakener]: Weakened 53 states. On average, predicates are now at 79.07% of their original sizes. [2018-11-12 19:03:44,761 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:03:45,220 INFO L415 sIntCurrentIteration]: We unified 337 AI predicates to 337 [2018-11-12 19:03:45,221 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:03:45,221 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:03:45,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [12] total 29 [2018-11-12 19:03:45,222 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:03:45,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-12 19:03:45,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-12 19:03:45,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-12 19:03:45,223 INFO L87 Difference]: Start difference. First operand 5024 states and 6344 transitions. Second operand 19 states. [2018-11-12 19:04:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:04:07,156 INFO L93 Difference]: Finished difference Result 9568 states and 12347 transitions. [2018-11-12 19:04:07,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 19:04:07,157 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 338 [2018-11-12 19:04:07,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:04:07,179 INFO L225 Difference]: With dead ends: 9568 [2018-11-12 19:04:07,180 INFO L226 Difference]: Without dead ends: 6490 [2018-11-12 19:04:07,192 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 345 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2018-11-12 19:04:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2018-11-12 19:04:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 5676. [2018-11-12 19:04:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5676 states. [2018-11-12 19:04:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5676 states to 5676 states and 7034 transitions. [2018-11-12 19:04:07,310 INFO L78 Accepts]: Start accepts. Automaton has 5676 states and 7034 transitions. Word has length 338 [2018-11-12 19:04:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:04:07,311 INFO L480 AbstractCegarLoop]: Abstraction has 5676 states and 7034 transitions. [2018-11-12 19:04:07,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-12 19:04:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5676 states and 7034 transitions. [2018-11-12 19:04:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-11-12 19:04:07,325 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:04:07,326 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:04:07,326 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:04:07,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:07,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1143820971, now seen corresponding path program 1 times [2018-11-12 19:04:07,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:04:07,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:07,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:04:07,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:07,327 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:04:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:04:07,637 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 19:04:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 363 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:04:08,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:04:08,503 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:04:08,504 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 355 with the following transitions: [2018-11-12 19:04:08,504 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:04:08,507 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:04:08,507 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:04:08,557 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:04:08,914 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:04:08,914 INFO L272 AbstractInterpreter]: Visited 121 different actions 475 times. Merged at 8 different actions 27 times. Never widened. Performed 5727 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5727 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:04:08,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:08,922 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:04:08,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:04:08,922 INFO L192 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 [2018-11-12 19:04:08,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:04:08,932 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:04:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:04:09,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:04:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-12 19:04:09,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:04:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-12 19:04:10,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:04:10,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2018-11-12 19:04:10,406 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:04:10,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-12 19:04:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-12 19:04:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-11-12 19:04:10,408 INFO L87 Difference]: Start difference. First operand 5676 states and 7034 transitions. Second operand 14 states. [2018-11-12 19:04:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:04:16,854 INFO L93 Difference]: Finished difference Result 15791 states and 20658 transitions. [2018-11-12 19:04:16,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-12 19:04:16,855 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 354 [2018-11-12 19:04:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:04:16,893 INFO L225 Difference]: With dead ends: 15791 [2018-11-12 19:04:16,893 INFO L226 Difference]: Without dead ends: 10860 [2018-11-12 19:04:16,918 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 733 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2018-11-12 19:04:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10860 states. [2018-11-12 19:04:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10860 to 10490. [2018-11-12 19:04:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10490 states. [2018-11-12 19:04:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10490 states to 10490 states and 12530 transitions. [2018-11-12 19:04:17,129 INFO L78 Accepts]: Start accepts. Automaton has 10490 states and 12530 transitions. Word has length 354 [2018-11-12 19:04:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:04:17,130 INFO L480 AbstractCegarLoop]: Abstraction has 10490 states and 12530 transitions. [2018-11-12 19:04:17,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-12 19:04:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 10490 states and 12530 transitions. [2018-11-12 19:04:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-11-12 19:04:17,159 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:04:17,160 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, 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, 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] [2018-11-12 19:04:17,160 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:04:17,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:17,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1365330226, now seen corresponding path program 1 times [2018-11-12 19:04:17,161 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:04:17,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:17,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:04:17,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:17,162 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:04:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:04:17,613 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:04:17,826 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:04:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 169 proven. 214 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:04:18,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:04:18,272 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:04:18,273 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 364 with the following transitions: [2018-11-12 19:04:18,273 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [798], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:04:18,276 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:04:18,276 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:04:18,346 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:04:18,623 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:04:18,624 INFO L272 AbstractInterpreter]: Visited 155 different actions 306 times. Merged at 5 different actions 7 times. Never widened. Performed 5531 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5531 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:04:18,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:18,629 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:04:19,338 INFO L227 lantSequenceWeakener]: Weakened 80 states. On average, predicates are now at 78.47% of their original sizes. [2018-11-12 19:04:19,338 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:04:20,169 INFO L415 sIntCurrentIteration]: We unified 362 AI predicates to 362 [2018-11-12 19:04:20,169 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:04:20,169 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:04:20,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [12] total 31 [2018-11-12 19:04:20,170 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:04:20,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 19:04:20,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 19:04:20,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2018-11-12 19:04:20,171 INFO L87 Difference]: Start difference. First operand 10490 states and 12530 transitions. Second operand 21 states. [2018-11-12 19:04:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:04:41,914 INFO L93 Difference]: Finished difference Result 19420 states and 23560 transitions. [2018-11-12 19:04:41,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 19:04:41,915 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 363 [2018-11-12 19:04:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:04:41,949 INFO L225 Difference]: With dead ends: 19420 [2018-11-12 19:04:41,950 INFO L226 Difference]: Without dead ends: 12621 [2018-11-12 19:04:41,967 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 370 GetRequests, 337 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2018-11-12 19:04:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12621 states. [2018-11-12 19:04:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 12490. [2018-11-12 19:04:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12490 states. [2018-11-12 19:04:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12490 states to 12490 states and 14621 transitions. [2018-11-12 19:04:42,189 INFO L78 Accepts]: Start accepts. Automaton has 12490 states and 14621 transitions. Word has length 363 [2018-11-12 19:04:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:04:42,189 INFO L480 AbstractCegarLoop]: Abstraction has 12490 states and 14621 transitions. [2018-11-12 19:04:42,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 19:04:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 12490 states and 14621 transitions. [2018-11-12 19:04:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-11-12 19:04:42,219 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:04:42,219 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:04:42,219 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:04:42,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:42,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1579032322, now seen corresponding path program 1 times [2018-11-12 19:04:42,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:04:42,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:42,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:04:42,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:42,221 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:04:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:04:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-12 19:04:42,463 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:04:42,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 19:04:42,463 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:04:42,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 19:04:42,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 19:04:42,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:04:42,465 INFO L87 Difference]: Start difference. First operand 12490 states and 14621 transitions. Second operand 3 states. [2018-11-12 19:04:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:04:44,221 INFO L93 Difference]: Finished difference Result 21048 states and 26342 transitions. [2018-11-12 19:04:44,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 19:04:44,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 365 [2018-11-12 19:04:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:04:44,290 INFO L225 Difference]: With dead ends: 21048 [2018-11-12 19:04:44,290 INFO L226 Difference]: Without dead ends: 14249 [2018-11-12 19:04:44,319 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 19:04:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14249 states. [2018-11-12 19:04:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14249 to 14217. [2018-11-12 19:04:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14217 states. [2018-11-12 19:04:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14217 states to 14217 states and 16666 transitions. [2018-11-12 19:04:44,569 INFO L78 Accepts]: Start accepts. Automaton has 14217 states and 16666 transitions. Word has length 365 [2018-11-12 19:04:44,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:04:44,570 INFO L480 AbstractCegarLoop]: Abstraction has 14217 states and 16666 transitions. [2018-11-12 19:04:44,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 19:04:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 14217 states and 16666 transitions. [2018-11-12 19:04:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-11-12 19:04:44,602 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:04:44,602 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, 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, 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] [2018-11-12 19:04:44,603 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:04:44,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:44,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1080162015, now seen corresponding path program 1 times [2018-11-12 19:04:44,603 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:04:44,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:44,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:04:44,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:04:44,604 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:04:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:04:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 243 proven. 140 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:04:45,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:04:45,452 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:04:45,452 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 377 with the following transitions: [2018-11-12 19:04:45,453 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [850], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:04:45,455 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:04:45,455 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:04:45,481 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:04:45,696 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:04:45,696 INFO L272 AbstractInterpreter]: Visited 168 different actions 329 times. Merged at 4 different actions 4 times. Never widened. Performed 4672 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4672 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:04:45,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:04:45,703 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:04:46,234 INFO L227 lantSequenceWeakener]: Weakened 49 states. On average, predicates are now at 79.22% of their original sizes. [2018-11-12 19:04:46,234 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:04:47,343 INFO L415 sIntCurrentIteration]: We unified 375 AI predicates to 375 [2018-11-12 19:04:47,344 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:04:47,344 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:04:47,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [12] total 29 [2018-11-12 19:04:47,344 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:04:47,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-12 19:04:47,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-12 19:04:47,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2018-11-12 19:04:47,346 INFO L87 Difference]: Start difference. First operand 14217 states and 16666 transitions. Second operand 19 states. [2018-11-12 19:05:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:05:14,103 INFO L93 Difference]: Finished difference Result 24875 states and 29742 transitions. [2018-11-12 19:05:14,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-12 19:05:14,103 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 376 [2018-11-12 19:05:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:05:14,145 INFO L225 Difference]: With dead ends: 24875 [2018-11-12 19:05:14,145 INFO L226 Difference]: Without dead ends: 16349 [2018-11-12 19:05:14,169 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 385 GetRequests, 352 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2018-11-12 19:05:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16349 states. [2018-11-12 19:05:14,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16349 to 15153. [2018-11-12 19:05:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15153 states. [2018-11-12 19:05:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15153 states to 15153 states and 17632 transitions. [2018-11-12 19:05:14,418 INFO L78 Accepts]: Start accepts. Automaton has 15153 states and 17632 transitions. Word has length 376 [2018-11-12 19:05:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:05:14,418 INFO L480 AbstractCegarLoop]: Abstraction has 15153 states and 17632 transitions. [2018-11-12 19:05:14,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-12 19:05:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 15153 states and 17632 transitions. [2018-11-12 19:05:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-11-12 19:05:14,446 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:05:14,447 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, 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, 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] [2018-11-12 19:05:14,447 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:05:14,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:14,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1214468615, now seen corresponding path program 1 times [2018-11-12 19:05:14,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:05:14,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:14,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:05:14,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:14,449 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:05:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:05:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 231 proven. 152 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:05:15,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:05:15,736 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:05:15,736 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 389 with the following transitions: [2018-11-12 19:05:15,736 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [898], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:05:15,739 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:05:15,739 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:05:15,778 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:05:15,968 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:05:15,968 INFO L272 AbstractInterpreter]: Visited 180 different actions 353 times. Merged at 4 different actions 4 times. Never widened. Performed 3773 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3773 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:05:15,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:15,977 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:05:16,425 INFO L227 lantSequenceWeakener]: Weakened 53 states. On average, predicates are now at 79.07% of their original sizes. [2018-11-12 19:05:16,425 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:05:16,891 INFO L415 sIntCurrentIteration]: We unified 387 AI predicates to 387 [2018-11-12 19:05:16,891 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:05:16,892 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:05:16,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [14] total 32 [2018-11-12 19:05:16,892 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:05:16,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:05:16,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:05:16,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:05:16,894 INFO L87 Difference]: Start difference. First operand 15153 states and 17632 transitions. Second operand 20 states. [2018-11-12 19:05:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:05:38,845 INFO L93 Difference]: Finished difference Result 25932 states and 30835 transitions. [2018-11-12 19:05:38,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 19:05:38,846 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 388 [2018-11-12 19:05:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:05:38,887 INFO L225 Difference]: With dead ends: 25932 [2018-11-12 19:05:38,887 INFO L226 Difference]: Without dead ends: 17406 [2018-11-12 19:05:38,910 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 397 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-11-12 19:05:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17406 states. [2018-11-12 19:05:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17406 to 16087. [2018-11-12 19:05:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16087 states. [2018-11-12 19:05:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16087 states to 16087 states and 18595 transitions. [2018-11-12 19:05:39,171 INFO L78 Accepts]: Start accepts. Automaton has 16087 states and 18595 transitions. Word has length 388 [2018-11-12 19:05:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:05:39,171 INFO L480 AbstractCegarLoop]: Abstraction has 16087 states and 18595 transitions. [2018-11-12 19:05:39,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:05:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 16087 states and 18595 transitions. [2018-11-12 19:05:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-11-12 19:05:39,190 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:05:39,191 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 19:05:39,191 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:05:39,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2029639823, now seen corresponding path program 1 times [2018-11-12 19:05:39,191 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:05:39,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:39,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:05:39,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:39,192 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:05:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:05:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 301 proven. 154 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-11-12 19:05:39,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:05:39,809 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:05:39,809 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 414 with the following transitions: [2018-11-12 19:05:39,809 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:05:39,811 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:05:39,811 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:05:39,861 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:05:40,123 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:05:40,124 INFO L272 AbstractInterpreter]: Visited 121 different actions 359 times. Merged at 7 different actions 18 times. Never widened. Performed 4691 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4691 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:05:40,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:40,136 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:05:40,574 INFO L227 lantSequenceWeakener]: Weakened 110 states. On average, predicates are now at 78.14% of their original sizes. [2018-11-12 19:05:40,574 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:05:40,876 INFO L415 sIntCurrentIteration]: We unified 412 AI predicates to 412 [2018-11-12 19:05:40,877 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:05:40,877 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:05:40,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [6] total 22 [2018-11-12 19:05:40,877 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:05:40,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 19:05:40,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 19:05:40,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-11-12 19:05:40,878 INFO L87 Difference]: Start difference. First operand 16087 states and 18595 transitions. Second operand 18 states. [2018-11-12 19:05:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:05:58,150 INFO L93 Difference]: Finished difference Result 28572 states and 33655 transitions. [2018-11-12 19:05:58,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-12 19:05:58,150 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 413 [2018-11-12 19:05:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:05:58,197 INFO L225 Difference]: With dead ends: 28572 [2018-11-12 19:05:58,197 INFO L226 Difference]: Without dead ends: 20046 [2018-11-12 19:05:58,223 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 423 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2018-11-12 19:05:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20046 states. [2018-11-12 19:05:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20046 to 20022. [2018-11-12 19:05:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20022 states. [2018-11-12 19:05:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20022 states to 20022 states and 22796 transitions. [2018-11-12 19:05:58,528 INFO L78 Accepts]: Start accepts. Automaton has 20022 states and 22796 transitions. Word has length 413 [2018-11-12 19:05:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:05:58,529 INFO L480 AbstractCegarLoop]: Abstraction has 20022 states and 22796 transitions. [2018-11-12 19:05:58,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 19:05:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 20022 states and 22796 transitions. [2018-11-12 19:05:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2018-11-12 19:05:58,554 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:05:58,555 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 19:05:58,555 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:05:58,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:05:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2080543808, now seen corresponding path program 1 times [2018-11-12 19:05:58,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:05:58,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:58,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:05:58,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:05:58,557 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:05:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:05:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 319 proven. 362 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:05:59,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:05:59,702 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:05:59,703 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 417 with the following transitions: [2018-11-12 19:05:59,703 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [373], [375], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:05:59,705 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:05:59,705 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:05:59,736 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:06:00,021 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:06:00,021 INFO L272 AbstractInterpreter]: Visited 121 different actions 358 times. Merged at 7 different actions 17 times. Never widened. Performed 3491 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3491 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:06:00,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:00,055 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:06:00,667 INFO L227 lantSequenceWeakener]: Weakened 84 states. On average, predicates are now at 77.92% of their original sizes. [2018-11-12 19:06:00,667 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:06:00,973 INFO L415 sIntCurrentIteration]: We unified 415 AI predicates to 415 [2018-11-12 19:06:00,973 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:06:00,974 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:06:00,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [15] total 29 [2018-11-12 19:06:00,974 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:00,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 19:06:00,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 19:06:00,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-11-12 19:06:00,975 INFO L87 Difference]: Start difference. First operand 20022 states and 22796 transitions. Second operand 16 states. Received shutdown request... [2018-11-12 19:06:04,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 19:06:04,675 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 19:06:04,680 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 19:06:04,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 07:06:04 BoogieIcfgContainer [2018-11-12 19:06:04,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 19:06:04,682 INFO L168 Benchmark]: Toolchain (without parser) took 223323.26 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -958.4 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-11-12 19:06:04,683 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-11-12 19:06:04,683 INFO L168 Benchmark]: CACSL2BoogieTranslator took 915.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-12 19:06:04,684 INFO L168 Benchmark]: Boogie Procedure Inliner took 132.08 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 738.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -828.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2018-11-12 19:06:04,685 INFO L168 Benchmark]: Boogie Preprocessor took 113.73 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. [2018-11-12 19:06:04,685 INFO L168 Benchmark]: RCFGBuilder took 3467.47 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 129.4 MB). Peak memory consumption was 129.4 MB. Max. memory is 7.1 GB. [2018-11-12 19:06:04,686 INFO L168 Benchmark]: TraceAbstraction took 218688.54 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -301.8 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-12 19:06:04,690 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 915.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 132.08 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 738.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -828.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.73 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 3467.47 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 129.4 MB). Peak memory consumption was 129.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218688.54 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -301.8 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 160]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 160). Cancelled while BasicCegarLoop was constructing difference of abstraction (20022states) and FLOYD_HOARE automaton (currently 17 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (264 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 218.6s OverallTime, 16 OverallIterations, 5 TraceHistogramMax, 187.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2783 SDtfs, 39977 SDslu, 2652 SDs, 0 SdLazy, 34206 SolverSat, 4508 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.6s Time, PredicateUnifierStatistics: 18 DeclaredPredicates, 4051 GetRequests, 3723 SyntacticMatches, 21 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20022occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.3s AbstIntTime, 10 AbstIntIterations, 9 AbstIntStrong, 0.9970860619473816 AbsIntWeakeningRatio, 0.09386973180076628 AbsIntAvgWeakeningVarsNumRemoved, 13.753512132822477 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 4965 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 4797 NumberOfCodeBlocks, 4797 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 5133 ConstructedInterpolants, 0 QuantifiedInterpolants, 12268917 SizeOfPredicates, 2 NumberOfNonLiveVariables, 572 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 4209/5761 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown