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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label47_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 09:31:05,396 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 09:31:05,398 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 09:31:05,415 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 09:31:05,415 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 09:31:05,417 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 09:31:05,420 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 09:31:05,424 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 09:31:05,425 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 09:31:05,429 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 09:31:05,430 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 09:31:05,431 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 09:31:05,433 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 09:31:05,434 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 09:31:05,435 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 09:31:05,436 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 09:31:05,436 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 09:31:05,438 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 09:31:05,440 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 09:31:05,442 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 09:31:05,443 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 09:31:05,445 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 09:31:05,447 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 09:31:05,460 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 09:31:05,488 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 09:31:05,488 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 09:31:05,489 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 09:31:05,489 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 09:31:05,489 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 09:31:05,489 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 09:31:05,490 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 09:31:05,490 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 09:31:05,490 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 09:31:05,490 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 09:31:05,491 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 09:31:05,491 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 09:31:05,491 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 09:31:05,491 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 09:31:05,492 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 09:31:05,492 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 09:31:05,493 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 09:31:05,493 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 09:31:05,493 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 09:31:05,493 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 09:31:05,493 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 09:31:05,493 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 09:31:05,494 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 09:31:05,494 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 09:31:05,494 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 09:31:05,494 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 09:31:05,494 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 09:31:05,495 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 09:31:05,496 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 09:31:05,497 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 09:31:05,497 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 09:31:05,497 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 09:31:05,497 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 09:31:05,497 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 09:31:05,498 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 09:31:05,498 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 09:31:05,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 09:31:05,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 09:31:05,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 09:31:05,595 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 09:31:05,595 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 09:31:05,596 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label47_true-unreach-call.c [2018-11-07 09:31:05,672 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d465fcce7/2b71b7e022724653b5a0d557f0949b05/FLAG9722d967f [2018-11-07 09:31:06,401 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 09:31:06,402 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label47_true-unreach-call.c [2018-11-07 09:31:06,429 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d465fcce7/2b71b7e022724653b5a0d557f0949b05/FLAG9722d967f [2018-11-07 09:31:06,448 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d465fcce7/2b71b7e022724653b5a0d557f0949b05 [2018-11-07 09:31:06,461 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 09:31:06,463 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 09:31:06,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 09:31:06,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 09:31:06,468 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 09:31:06,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:31:06" (1/1) ... [2018-11-07 09:31:06,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a2ccaad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:06, skipping insertion in model container [2018-11-07 09:31:06,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:31:06" (1/1) ... [2018-11-07 09:31:06,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 09:31:06,606 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 09:31:07,688 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 09:31:07,695 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 09:31:08,058 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 09:31:08,082 INFO L193 MainTranslator]: Completed translation [2018-11-07 09:31:08,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08 WrapperNode [2018-11-07 09:31:08,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 09:31:08,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 09:31:08,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 09:31:08,084 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 09:31:08,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (1/1) ... [2018-11-07 09:31:08,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (1/1) ... [2018-11-07 09:31:08,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 09:31:08,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 09:31:08,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 09:31:08,351 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 09:31:08,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (1/1) ... [2018-11-07 09:31:08,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (1/1) ... [2018-11-07 09:31:08,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (1/1) ... [2018-11-07 09:31:08,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (1/1) ... [2018-11-07 09:31:08,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (1/1) ... [2018-11-07 09:31:08,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (1/1) ... [2018-11-07 09:31:08,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (1/1) ... [2018-11-07 09:31:08,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 09:31:08,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 09:31:08,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 09:31:08,537 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 09:31:08,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 09:31:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 09:31:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 09:31:08,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 09:31:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 09:31:08,605 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 09:31:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 09:31:08,606 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 09:31:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 09:31:08,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 09:31:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 09:31:08,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 09:31:16,647 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 09:31:16,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:31:16 BoogieIcfgContainer [2018-11-07 09:31:16,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 09:31:16,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 09:31:16,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 09:31:16,653 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 09:31:16,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 09:31:06" (1/3) ... [2018-11-07 09:31:16,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@763ffd77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:31:16, skipping insertion in model container [2018-11-07 09:31:16,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:31:08" (2/3) ... [2018-11-07 09:31:16,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@763ffd77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:31:16, skipping insertion in model container [2018-11-07 09:31:16,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:31:16" (3/3) ... [2018-11-07 09:31:16,657 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label47_true-unreach-call.c [2018-11-07 09:31:16,667 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 09:31:16,677 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 09:31:16,695 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 09:31:16,739 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 09:31:16,740 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 09:31:16,740 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 09:31:16,740 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 09:31:16,740 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 09:31:16,740 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 09:31:16,741 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 09:31:16,741 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 09:31:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 09:31:16,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-07 09:31:16,789 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:31:16,790 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] [2018-11-07 09:31:16,793 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:31:16,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:31:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash -572495578, now seen corresponding path program 1 times [2018-11-07 09:31:16,803 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:31:16,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:31:16,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:31:16,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:31:16,860 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:31:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:31:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:31:17,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 09:31:17,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 09:31:17,380 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:31:17,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 09:31:17,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 09:31:17,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 09:31:17,407 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 09:31:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:31:29,053 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-11-07 09:31:29,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 09:31:29,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2018-11-07 09:31:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:31:29,101 INFO L225 Difference]: With dead ends: 2164 [2018-11-07 09:31:29,101 INFO L226 Difference]: Without dead ends: 1554 [2018-11-07 09:31:29,112 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 09:31:29,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-11-07 09:31:29,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1051. [2018-11-07 09:31:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-11-07 09:31:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1880 transitions. [2018-11-07 09:31:29,261 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1880 transitions. Word has length 51 [2018-11-07 09:31:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:31:29,262 INFO L480 AbstractCegarLoop]: Abstraction has 1051 states and 1880 transitions. [2018-11-07 09:31:29,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 09:31:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1880 transitions. [2018-11-07 09:31:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-11-07 09:31:29,270 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:31:29,270 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:31:29,271 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:31:29,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:31:29,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1304014569, now seen corresponding path program 1 times [2018-11-07 09:31:29,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:31:29,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:31:29,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:31:29,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:31:29,273 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:31:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:31:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:31:29,588 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 09:31:29,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 09:31:29,588 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:31:29,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 09:31:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 09:31:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 09:31:29,591 INFO L87 Difference]: Start difference. First operand 1051 states and 1880 transitions. Second operand 5 states. [2018-11-07 09:31:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:31:36,724 INFO L93 Difference]: Finished difference Result 3028 states and 5532 transitions. [2018-11-07 09:31:36,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 09:31:36,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2018-11-07 09:31:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:31:36,745 INFO L225 Difference]: With dead ends: 3028 [2018-11-07 09:31:36,745 INFO L226 Difference]: Without dead ends: 1983 [2018-11-07 09:31:36,750 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 [2018-11-07 09:31:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2018-11-07 09:31:36,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1957. [2018-11-07 09:31:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1957 states. [2018-11-07 09:31:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3236 transitions. [2018-11-07 09:31:36,831 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3236 transitions. Word has length 123 [2018-11-07 09:31:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:31:36,832 INFO L480 AbstractCegarLoop]: Abstraction has 1957 states and 3236 transitions. [2018-11-07 09:31:36,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 09:31:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3236 transitions. [2018-11-07 09:31:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-07 09:31:36,837 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:31:36,837 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:31:36,838 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:31:36,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:31:36,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2080151345, now seen corresponding path program 1 times [2018-11-07 09:31:36,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:31:36,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:31:36,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:31:36,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:31:36,840 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:31:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:31:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:31:37,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:31:37,142 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:31:37,143 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 127 with the following transitions: [2018-11-07 09:31:37,146 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1018], [1020], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:31:37,191 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:31:37,191 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:31:38,211 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:31:38,213 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 09:31:38,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:31:38,259 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:31:38,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:31:38,260 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:31:38,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:31:38,279 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:31:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:31:38,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:31:41,547 WARN L179 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 42 [2018-11-07 09:31:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:31:41,630 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:31:42,599 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2018-11-07 09:31:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:31:43,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 09:31:43,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-11-07 09:31:43,036 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:31:43,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 09:31:43,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 09:31:43,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-07 09:31:43,039 INFO L87 Difference]: Start difference. First operand 1957 states and 3236 transitions. Second operand 6 states. [2018-11-07 09:31:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:31:56,022 INFO L93 Difference]: Finished difference Result 7517 states and 12901 transitions. [2018-11-07 09:31:56,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 09:31:56,022 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2018-11-07 09:31:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:31:56,059 INFO L225 Difference]: With dead ends: 7517 [2018-11-07 09:31:56,059 INFO L226 Difference]: Without dead ends: 5566 [2018-11-07 09:31:56,075 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 247 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-07 09:31:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2018-11-07 09:31:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 5556. [2018-11-07 09:31:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5556 states. [2018-11-07 09:31:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 9351 transitions. [2018-11-07 09:31:56,241 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 9351 transitions. Word has length 126 [2018-11-07 09:31:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:31:56,242 INFO L480 AbstractCegarLoop]: Abstraction has 5556 states and 9351 transitions. [2018-11-07 09:31:56,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 09:31:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 9351 transitions. [2018-11-07 09:31:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-07 09:31:56,246 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:31:56,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:31:56,247 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:31:56,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:31:56,247 INFO L82 PathProgramCache]: Analyzing trace with hash 486218423, now seen corresponding path program 1 times [2018-11-07 09:31:56,247 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:31:56,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:31:56,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:31:56,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:31:56,249 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:31:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:31:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:31:56,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:31:56,608 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:31:56,608 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 140 with the following transitions: [2018-11-07 09:31:56,609 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1018], [1020], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:31:56,614 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:31:56,614 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:31:56,868 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:31:56,869 INFO L272 AbstractInterpreter]: Visited 96 different actions 185 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 09:31:56,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:31:56,907 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:31:56,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:31:56,907 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:31:56,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:31:56,926 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:31:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:31:56,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:31:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:31:57,153 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:31:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:31:57,294 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 09:31:57,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-07 09:31:57,295 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:31:57,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 09:31:57,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 09:31:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 09:31:57,296 INFO L87 Difference]: Start difference. First operand 5556 states and 9351 transitions. Second operand 3 states. [2018-11-07 09:32:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:32:00,506 INFO L93 Difference]: Finished difference Result 13728 states and 22981 transitions. [2018-11-07 09:32:00,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 09:32:00,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2018-11-07 09:32:00,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:32:00,552 INFO L225 Difference]: With dead ends: 13728 [2018-11-07 09:32:00,552 INFO L226 Difference]: Without dead ends: 8178 [2018-11-07 09:32:00,588 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 277 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 09:32:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8178 states. [2018-11-07 09:32:00,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8178 to 8177. [2018-11-07 09:32:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8177 states. [2018-11-07 09:32:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8177 states to 8177 states and 12781 transitions. [2018-11-07 09:32:00,792 INFO L78 Accepts]: Start accepts. Automaton has 8177 states and 12781 transitions. Word has length 139 [2018-11-07 09:32:00,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:32:00,793 INFO L480 AbstractCegarLoop]: Abstraction has 8177 states and 12781 transitions. [2018-11-07 09:32:00,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 09:32:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 8177 states and 12781 transitions. [2018-11-07 09:32:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-11-07 09:32:00,802 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:32:00,803 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:32:00,803 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:32:00,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:32:00,804 INFO L82 PathProgramCache]: Analyzing trace with hash 661531126, now seen corresponding path program 1 times [2018-11-07 09:32:00,804 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:32:00,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:32:00,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:32:00,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:32:00,805 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:32:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:32:01,085 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 09:32:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 89 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 09:32:01,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:32:01,139 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:32:01,140 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2018-11-07 09:32:01,140 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1018], [1020], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1329], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:32:01,145 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:32:01,145 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:32:01,699 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:32:01,699 INFO L272 AbstractInterpreter]: Visited 107 different actions 307 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 09:32:01,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:32:01,737 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:32:01,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:32:01,737 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:32:01,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:32:01,751 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:32:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:32:01,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:32:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:32:02,252 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:32:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:32:03,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 09:32:03,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 09:32:03,123 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 09:32:03,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 09:32:03,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 09:32:03,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-07 09:32:03,125 INFO L87 Difference]: Start difference. First operand 8177 states and 12781 transitions. Second operand 9 states. [2018-11-07 09:32:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:32:08,974 INFO L93 Difference]: Finished difference Result 16007 states and 25184 transitions. [2018-11-07 09:32:08,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 09:32:08,981 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 224 [2018-11-07 09:32:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:32:09,010 INFO L225 Difference]: With dead ends: 16007 [2018-11-07 09:32:09,011 INFO L226 Difference]: Without dead ends: 6866 [2018-11-07 09:32:09,042 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 446 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-11-07 09:32:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6866 states. [2018-11-07 09:32:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6866 to 6833. [2018-11-07 09:32:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6833 states. [2018-11-07 09:32:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6833 states to 6833 states and 8198 transitions. [2018-11-07 09:32:09,202 INFO L78 Accepts]: Start accepts. Automaton has 6833 states and 8198 transitions. Word has length 224 [2018-11-07 09:32:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:32:09,203 INFO L480 AbstractCegarLoop]: Abstraction has 6833 states and 8198 transitions. [2018-11-07 09:32:09,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 09:32:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6833 states and 8198 transitions. [2018-11-07 09:32:09,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-11-07 09:32:09,210 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:32:09,210 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:32:09,211 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:32:09,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:32:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash -478946251, now seen corresponding path program 1 times [2018-11-07 09:32:09,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:32:09,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:32:09,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:32:09,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:32:09,213 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:32:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:32:09,962 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 09:32:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 89 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-07 09:32:10,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:32:10,152 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:32:10,152 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-11-07 09:32:10,153 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1018], [1020], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1692], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:32:10,159 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:32:10,159 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:32:10,547 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:32:10,547 INFO L272 AbstractInterpreter]: Visited 175 different actions 349 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 09:32:10,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:32:10,585 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:32:10,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:32:10,585 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:32:10,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:32:10,598 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:32:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:32:10,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:32:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-07 09:32:11,312 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:32:11,506 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 09:32:12,356 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 09:32:12,482 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 09:32:14,653 WARN L179 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2018-11-07 09:32:14,766 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2018-11-07 09:32:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 93 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:32:15,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 09:32:15,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 21 [2018-11-07 09:32:15,925 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:32:15,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 09:32:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 09:32:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-11-07 09:32:15,927 INFO L87 Difference]: Start difference. First operand 6833 states and 8198 transitions. Second operand 7 states. [2018-11-07 09:32:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:32:25,842 INFO L93 Difference]: Finished difference Result 18216 states and 22243 transitions. [2018-11-07 09:32:25,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 09:32:25,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 305 [2018-11-07 09:32:25,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:32:25,874 INFO L225 Difference]: With dead ends: 18216 [2018-11-07 09:32:25,874 INFO L226 Difference]: Without dead ends: 10950 [2018-11-07 09:32:25,889 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 599 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2018-11-07 09:32:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2018-11-07 09:32:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 10004. [2018-11-07 09:32:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10004 states. [2018-11-07 09:32:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10004 states to 10004 states and 11867 transitions. [2018-11-07 09:32:26,081 INFO L78 Accepts]: Start accepts. Automaton has 10004 states and 11867 transitions. Word has length 305 [2018-11-07 09:32:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:32:26,081 INFO L480 AbstractCegarLoop]: Abstraction has 10004 states and 11867 transitions. [2018-11-07 09:32:26,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 09:32:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand 10004 states and 11867 transitions. [2018-11-07 09:32:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-11-07 09:32:26,095 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:32:26,095 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:32:26,095 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:32:26,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:32:26,096 INFO L82 PathProgramCache]: Analyzing trace with hash -620484572, now seen corresponding path program 1 times [2018-11-07 09:32:26,096 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:32:26,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:32:26,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:32:26,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:32:26,097 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:32:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:32:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 138 proven. 240 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-07 09:32:26,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:32:26,786 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:32:26,786 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 409 with the following transitions: [2018-11-07 09:32:26,786 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1018], [1020], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1356], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1692], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:32:26,792 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:32:26,792 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:32:27,195 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:32:27,195 INFO L272 AbstractInterpreter]: Visited 176 different actions 354 times. Merged at 8 different actions 14 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 09:32:27,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:32:27,220 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:32:27,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:32:27,221 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:32:27,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:32:27,229 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:32:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:32:27,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:32:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 283 proven. 55 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 09:32:27,937 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:32:28,505 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-11-07 09:32:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 142 proven. 264 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 09:32:29,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 09:32:29,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 19 [2018-11-07 09:32:29,899 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 09:32:29,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 09:32:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 09:32:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2018-11-07 09:32:29,902 INFO L87 Difference]: Start difference. First operand 10004 states and 11867 transitions. Second operand 13 states. [2018-11-07 09:32:34,751 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2018-11-07 09:32:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:32:58,391 INFO L93 Difference]: Finished difference Result 52507 states and 70553 transitions. [2018-11-07 09:32:58,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-07 09:32:58,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 408 [2018-11-07 09:32:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:32:58,607 INFO L225 Difference]: With dead ends: 52507 [2018-11-07 09:32:58,608 INFO L226 Difference]: Without dead ends: 42509 [2018-11-07 09:32:58,671 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 842 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1134, Invalid=4122, Unknown=0, NotChecked=0, Total=5256 [2018-11-07 09:32:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42509 states. [2018-11-07 09:32:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42509 to 37143. [2018-11-07 09:32:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37143 states. [2018-11-07 09:32:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37143 states to 37143 states and 47646 transitions. [2018-11-07 09:32:59,881 INFO L78 Accepts]: Start accepts. Automaton has 37143 states and 47646 transitions. Word has length 408 [2018-11-07 09:32:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:32:59,884 INFO L480 AbstractCegarLoop]: Abstraction has 37143 states and 47646 transitions. [2018-11-07 09:32:59,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 09:32:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 37143 states and 47646 transitions. [2018-11-07 09:32:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-11-07 09:32:59,900 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:32:59,900 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:32:59,901 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:32:59,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:32:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash -519986993, now seen corresponding path program 1 times [2018-11-07 09:32:59,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:32:59,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:32:59,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:32:59,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:32:59,902 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:32:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 138 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-07 09:33:00,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:00,847 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:33:00,847 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 427 with the following transitions: [2018-11-07 09:33:00,848 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1018], [1020], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1376], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1758], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:33:00,855 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:33:00,855 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:33:01,255 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:33:01,255 INFO L272 AbstractInterpreter]: Visited 189 different actions 379 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 09:33:01,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:01,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:33:01,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:01,281 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:33:01,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:01,295 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:33:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:01,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:33:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 09:33:01,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:33:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 329 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 09:33:02,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 09:33:02,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-07 09:33:02,688 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 09:33:02,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 09:33:02,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 09:33:02,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-11-07 09:33:02,689 INFO L87 Difference]: Start difference. First operand 37143 states and 47646 transitions. Second operand 10 states. [2018-11-07 09:33:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:33:14,305 INFO L93 Difference]: Finished difference Result 118562 states and 154965 transitions. [2018-11-07 09:33:14,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-07 09:33:14,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 426 [2018-11-07 09:33:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:33:14,985 INFO L225 Difference]: With dead ends: 118562 [2018-11-07 09:33:14,985 INFO L226 Difference]: Without dead ends: 73012 [2018-11-07 09:33:15,116 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 865 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2018-11-07 09:33:15,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73012 states. [2018-11-07 09:33:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73012 to 61462. [2018-11-07 09:33:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61462 states. [2018-11-07 09:33:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61462 states to 61462 states and 77090 transitions. [2018-11-07 09:33:16,503 INFO L78 Accepts]: Start accepts. Automaton has 61462 states and 77090 transitions. Word has length 426 [2018-11-07 09:33:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:33:16,504 INFO L480 AbstractCegarLoop]: Abstraction has 61462 states and 77090 transitions. [2018-11-07 09:33:16,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 09:33:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 61462 states and 77090 transitions. [2018-11-07 09:33:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-11-07 09:33:16,530 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:33:16,531 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:33:16,531 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:33:16,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash -957097124, now seen corresponding path program 1 times [2018-11-07 09:33:16,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:33:16,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:16,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:16,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:16,533 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:33:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:17,642 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-11-07 09:33:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 7 proven. 206 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2018-11-07 09:33:17,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:17,950 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:33:17,950 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 496 with the following transitions: [2018-11-07 09:33:17,950 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1018], [1020], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1356], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1692], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:33:17,954 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:33:17,954 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:33:18,371 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:33:18,371 INFO L272 AbstractInterpreter]: Visited 177 different actions 359 times. Merged at 9 different actions 17 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 09:33:18,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:18,410 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:33:18,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:18,410 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:33:18,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:18,425 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:33:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:18,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:33:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 418 proven. 42 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-11-07 09:33:19,067 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:33:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 458 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-11-07 09:33:20,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 09:33:20,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 16 [2018-11-07 09:33:20,801 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 09:33:20,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 09:33:20,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 09:33:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-11-07 09:33:20,802 INFO L87 Difference]: Start difference. First operand 61462 states and 77090 transitions. Second operand 13 states. [2018-11-07 09:33:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:33:35,124 INFO L93 Difference]: Finished difference Result 188028 states and 247191 transitions. [2018-11-07 09:33:35,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 09:33:35,124 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 495 [2018-11-07 09:33:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:33:35,737 INFO L225 Difference]: With dead ends: 188028 [2018-11-07 09:33:35,737 INFO L226 Difference]: Without dead ends: 121933 [2018-11-07 09:33:35,911 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 1000 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=255, Invalid=615, Unknown=0, NotChecked=0, Total=870 [2018-11-07 09:33:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121933 states. [2018-11-07 09:33:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121933 to 112455. [2018-11-07 09:33:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112455 states. [2018-11-07 09:33:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112455 states to 112455 states and 141595 transitions. [2018-11-07 09:33:38,612 INFO L78 Accepts]: Start accepts. Automaton has 112455 states and 141595 transitions. Word has length 495 [2018-11-07 09:33:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:33:38,613 INFO L480 AbstractCegarLoop]: Abstraction has 112455 states and 141595 transitions. [2018-11-07 09:33:38,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 09:33:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 112455 states and 141595 transitions. [2018-11-07 09:33:38,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2018-11-07 09:33:38,648 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:33:38,648 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:33:38,649 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:33:38,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1088766146, now seen corresponding path program 1 times [2018-11-07 09:33:38,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:33:38,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:38,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:38,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:33:38,650 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:33:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 462 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-07 09:33:40,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:40,166 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:33:40,166 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 500 with the following transitions: [2018-11-07 09:33:40,166 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1018], [1020], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1266], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1692], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:33:40,170 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:33:40,170 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:33:40,783 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:33:40,783 INFO L272 AbstractInterpreter]: Visited 177 different actions 357 times. Merged at 9 different actions 15 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 09:33:40,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:33:40,809 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:33:40,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:33:40,809 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:33:40,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:33:40,822 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:33:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:33:40,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:33:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 538 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-11-07 09:33:41,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:33:41,797 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 09:33:41,826 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-11-07 09:33:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 187 proven. 433 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-11-07 09:33:42,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 09:33:42,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 16 [2018-11-07 09:33:42,609 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 09:33:42,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 09:33:42,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 09:33:42,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-11-07 09:33:42,611 INFO L87 Difference]: Start difference. First operand 112455 states and 141595 transitions. Second operand 11 states. [2018-11-07 09:34:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:34:10,785 INFO L93 Difference]: Finished difference Result 308056 states and 397508 transitions. [2018-11-07 09:34:10,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-11-07 09:34:10,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 499 [2018-11-07 09:34:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:34:11,631 INFO L225 Difference]: With dead ends: 308056 [2018-11-07 09:34:11,631 INFO L226 Difference]: Without dead ends: 190498 [2018-11-07 09:34:11,908 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1038 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=977, Invalid=4425, Unknown=0, NotChecked=0, Total=5402 [2018-11-07 09:34:12,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190498 states. [2018-11-07 09:34:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190498 to 169040. [2018-11-07 09:34:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169040 states. [2018-11-07 09:34:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169040 states to 169040 states and 211189 transitions. [2018-11-07 09:34:16,118 INFO L78 Accepts]: Start accepts. Automaton has 169040 states and 211189 transitions. Word has length 499 [2018-11-07 09:34:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:34:16,119 INFO L480 AbstractCegarLoop]: Abstraction has 169040 states and 211189 transitions. [2018-11-07 09:34:16,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 09:34:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 169040 states and 211189 transitions. [2018-11-07 09:34:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2018-11-07 09:34:16,144 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:34:16,144 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:34:16,144 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:34:16,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:34:16,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1885294886, now seen corresponding path program 1 times [2018-11-07 09:34:16,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:34:16,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:34:16,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:34:16,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:34:16,146 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:34:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:34:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 189 proven. 451 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-11-07 09:34:18,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:34:18,483 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:34:18,483 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 533 with the following transitions: [2018-11-07 09:34:18,483 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1018], [1020], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1266], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1478], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1758], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 09:34:18,487 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:34:18,487 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:34:18,934 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:34:18,934 INFO L272 AbstractInterpreter]: Visited 190 different actions 384 times. Merged at 9 different actions 16 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 09:34:18,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:34:18,973 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:34:18,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:34:18,973 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:34:18,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:34:18,988 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:34:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:34:19,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:34:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 482 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-07 09:34:19,531 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:34:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 482 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-07 09:34:19,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 09:34:19,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-07 09:34:19,997 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 09:34:19,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 09:34:19,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 09:34:19,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2018-11-07 09:34:19,999 INFO L87 Difference]: Start difference. First operand 169040 states and 211189 transitions. Second operand 17 states. [2018-11-07 09:34:23,316 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-11-07 09:34:25,296 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2018-11-07 09:34:26,531 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2018-11-07 09:34:27,129 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2018-11-07 09:34:27,355 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2018-11-07 09:34:27,646 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2018-11-07 09:34:32,493 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2018-11-07 09:34:35,003 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2018-11-07 09:34:38,277 WARN L179 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2018-11-07 09:34:38,838 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2018-11-07 09:34:40,771 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2018-11-07 09:34:43,174 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2018-11-07 09:34:45,229 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2018-11-07 09:34:48,232 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2018-11-07 09:34:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:34:51,063 INFO L93 Difference]: Finished difference Result 347349 states and 435273 transitions. [2018-11-07 09:34:51,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-07 09:34:51,064 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 532 [2018-11-07 09:34:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:34:51,755 INFO L225 Difference]: With dead ends: 347349 [2018-11-07 09:34:51,756 INFO L226 Difference]: Without dead ends: 190281 [2018-11-07 09:34:52,078 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1193 GetRequests, 1110 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1142, Invalid=5664, Unknown=0, NotChecked=0, Total=6806 [2018-11-07 09:34:52,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190281 states. Received shutdown request... [2018-11-07 09:34:53,559 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 09:34:53,564 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 09:34:53,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 09:34:53 BoogieIcfgContainer [2018-11-07 09:34:53,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 09:34:53,565 INFO L168 Benchmark]: Toolchain (without parser) took 227103.60 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -540.5 MB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. [2018-11-07 09:34:53,566 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 09:34:53,567 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1619.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-11-07 09:34:53,568 INFO L168 Benchmark]: Boogie Procedure Inliner took 267.24 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 789.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -958.7 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2018-11-07 09:34:53,572 INFO L168 Benchmark]: Boogie Preprocessor took 185.42 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-11-07 09:34:53,572 INFO L168 Benchmark]: RCFGBuilder took 8111.32 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 455.8 MB). Peak memory consumption was 455.8 MB. Max. memory is 7.1 GB. [2018-11-07 09:34:53,573 INFO L168 Benchmark]: TraceAbstraction took 216915.17 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.8 GB in the beginning and 2.0 GB in the end (delta: -178.0 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2018-11-07 09:34:53,585 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1619.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 267.24 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 789.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -958.7 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 185.42 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8111.32 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 455.8 MB). Peak memory consumption was 455.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216915.17 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.8 GB in the beginning and 2.0 GB in the end (delta: -178.0 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 140]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 140). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 216.8s OverallTime, 11 OverallIterations, 5 TraceHistogramMax, 168.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2808 SDtfs, 49236 SDslu, 5660 SDs, 0 SdLazy, 77417 SolverSat, 11344 SolverUnsat, 348 SolverUnknown, 0 SolverNotchecked, 126.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6798 GetRequests, 6430 SyntacticMatches, 27 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5894 ImplicationChecksByTransitivity, 23.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169040occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 4.9s AbstIntTime, 9 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 11.9s AutomataMinimizationTime, 11 MinimizatonAttempts, 49371 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 25.4s InterpolantComputationTime, 6482 NumberOfCodeBlocks, 6482 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 9607 ConstructedInterpolants, 721 QuantifiedInterpolants, 24753208 SizeOfPredicates, 22 NumberOfNonLiveVariables, 5131 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 29 InterpolantComputations, 6 PerfectInterpolantSequences, 8132/10298 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown