java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label06_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 18:35:02,374 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 18:35:02,379 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 18:35:02,398 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 18:35:02,399 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 18:35:02,400 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 18:35:02,401 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 18:35:02,406 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 18:35:02,407 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 18:35:02,408 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 18:35:02,409 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 18:35:02,409 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 18:35:02,411 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 18:35:02,412 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 18:35:02,415 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 18:35:02,416 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 18:35:02,417 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 18:35:02,426 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 18:35:02,430 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 18:35:02,435 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 18:35:02,436 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 18:35:02,440 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 18:35:02,444 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 18:35:02,444 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 18:35:02,444 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 18:35:02,446 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 18:35:02,447 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 18:35:02,447 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 18:35:02,451 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 18:35:02,452 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 18:35:02,452 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 18:35:02,453 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 18:35:02,453 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 18:35:02,453 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 18:35:02,454 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 18:35:02,455 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 18:35:02,455 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 18:35:02,486 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 18:35:02,486 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 18:35:02,489 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 18:35:02,489 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 18:35:02,490 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 18:35:02,490 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 18:35:02,490 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 18:35:02,490 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 18:35:02,490 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 18:35:02,491 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 18:35:02,491 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 18:35:02,491 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 18:35:02,491 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 18:35:02,493 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 18:35:02,493 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 18:35:02,493 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 18:35:02,494 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 18:35:02,494 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 18:35:02,494 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 18:35:02,494 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 18:35:02,494 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 18:35:02,495 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 18:35:02,495 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 18:35:02,495 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 18:35:02,496 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 18:35:02,496 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:35:02,496 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 18:35:02,496 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 18:35:02,496 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 18:35:02,497 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 18:35:02,498 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 18:35:02,498 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 18:35:02,499 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 18:35:02,499 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 18:35:02,499 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 18:35:02,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 18:35:02,589 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 18:35:02,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 18:35:02,595 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 18:35:02,596 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 18:35:02,596 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label06_true-unreach-call.c [2018-11-12 18:35:02,665 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c93474b2/972b3d37e39a46ba93778650420e99e3/FLAGa5b2af19e [2018-11-12 18:35:03,304 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 18:35:03,305 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label06_true-unreach-call.c [2018-11-12 18:35:03,321 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c93474b2/972b3d37e39a46ba93778650420e99e3/FLAGa5b2af19e [2018-11-12 18:35:03,337 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c93474b2/972b3d37e39a46ba93778650420e99e3 [2018-11-12 18:35:03,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 18:35:03,351 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 18:35:03,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 18:35:03,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 18:35:03,357 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 18:35:03,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:35:03" (1/1) ... [2018-11-12 18:35:03,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2b0430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:03, skipping insertion in model container [2018-11-12 18:35:03,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:35:03" (1/1) ... [2018-11-12 18:35:03,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 18:35:03,452 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 18:35:04,110 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:35:04,115 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 18:35:04,339 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:35:04,359 INFO L193 MainTranslator]: Completed translation [2018-11-12 18:35:04,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04 WrapperNode [2018-11-12 18:35:04,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 18:35:04,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 18:35:04,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 18:35:04,361 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 18:35:04,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 18:35:04,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 18:35:04,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 18:35:04,551 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 18:35:04,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 18:35:04,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 18:35:04,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 18:35:04,667 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 18:35:04,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:35:04,743 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 18:35:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 18:35:04,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 18:35:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 18:35:04,745 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 18:35:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 18:35:04,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 18:35:04,746 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 18:35:04,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 18:35:09,027 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 18:35:09,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:35:09 BoogieIcfgContainer [2018-11-12 18:35:09,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 18:35:09,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 18:35:09,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 18:35:09,034 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 18:35:09,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 06:35:03" (1/3) ... [2018-11-12 18:35:09,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae673d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:35:09, skipping insertion in model container [2018-11-12 18:35:09,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04" (2/3) ... [2018-11-12 18:35:09,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae673d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:35:09, skipping insertion in model container [2018-11-12 18:35:09,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:35:09" (3/3) ... [2018-11-12 18:35:09,038 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label06_true-unreach-call.c [2018-11-12 18:35:09,049 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 18:35:09,061 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 18:35:09,081 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 18:35:09,130 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 18:35:09,130 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 18:35:09,130 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 18:35:09,130 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 18:35:09,131 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 18:35:09,131 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 18:35:09,131 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 18:35:09,131 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 18:35:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-12 18:35:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-12 18:35:09,183 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:09,184 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:35:09,187 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:09,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash 712753892, now seen corresponding path program 1 times [2018-11-12 18:35:09,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:09,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:09,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:09,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:09,255 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:09,724 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 18:35:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:35:09,801 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:35:09,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 18:35:09,802 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:35:09,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:35:09,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:35:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:35:09,827 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-11-12 18:35:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:35:11,865 INFO L93 Difference]: Finished difference Result 782 states and 1372 transitions. [2018-11-12 18:35:11,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:35:11,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2018-11-12 18:35:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:35:11,889 INFO L225 Difference]: With dead ends: 782 [2018-11-12 18:35:11,889 INFO L226 Difference]: Without dead ends: 487 [2018-11-12 18:35:11,898 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:35:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-11-12 18:35:11,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 482. [2018-11-12 18:35:11,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-11-12 18:35:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 843 transitions. [2018-11-12 18:35:11,987 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 843 transitions. Word has length 70 [2018-11-12 18:35:11,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:35:11,988 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 843 transitions. [2018-11-12 18:35:11,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:35:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 843 transitions. [2018-11-12 18:35:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-12 18:35:11,998 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:11,999 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:35:11,999 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:11,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:12,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1109140143, now seen corresponding path program 1 times [2018-11-12 18:35:12,000 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:12,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:12,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:12,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:12,002 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:35:12,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:35:12,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 18:35:12,652 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:35:12,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:35:12,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:35:12,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:35:12,655 INFO L87 Difference]: Start difference. First operand 482 states and 843 transitions. Second operand 7 states. [2018-11-12 18:35:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:35:19,227 INFO L93 Difference]: Finished difference Result 1760 states and 3239 transitions. [2018-11-12 18:35:19,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 18:35:19,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2018-11-12 18:35:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:35:19,239 INFO L225 Difference]: With dead ends: 1760 [2018-11-12 18:35:19,240 INFO L226 Difference]: Without dead ends: 1284 [2018-11-12 18:35:19,246 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-12 18:35:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2018-11-12 18:35:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1037. [2018-11-12 18:35:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2018-11-12 18:35:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1685 transitions. [2018-11-12 18:35:19,340 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1685 transitions. Word has length 145 [2018-11-12 18:35:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:35:19,341 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 1685 transitions. [2018-11-12 18:35:19,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:35:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1685 transitions. [2018-11-12 18:35:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-12 18:35:19,347 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:19,348 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:35:19,348 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:19,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:19,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1947386976, now seen corresponding path program 1 times [2018-11-12 18:35:19,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:19,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:19,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:19,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:19,350 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:19,618 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 18:35:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 126 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 18:35:19,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:35:19,799 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:35:19,800 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 219 with the following transitions: [2018-11-12 18:35:19,802 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [514], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:35:19,864 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:35:19,864 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:35:20,365 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:35:20,368 INFO L272 AbstractInterpreter]: Visited 80 different actions 80 times. Never merged. Never widened. Performed 826 root evaluator evaluations with a maximum evaluation depth of 6. Performed 826 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 28 variables. [2018-11-12 18:35:20,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:20,417 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:35:21,071 INFO L227 lantSequenceWeakener]: Weakened 209 states. On average, predicates are now at 73.89% of their original sizes. [2018-11-12 18:35:21,074 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:35:21,198 INFO L415 sIntCurrentIteration]: We unified 217 AI predicates to 217 [2018-11-12 18:35:21,198 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:35:21,199 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:35:21,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-12 18:35:21,199 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:35:21,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:35:21,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:35:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:35:21,202 INFO L87 Difference]: Start difference. First operand 1037 states and 1685 transitions. Second operand 7 states. [2018-11-12 18:35:24,686 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:35:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:35:40,624 INFO L93 Difference]: Finished difference Result 2260 states and 3574 transitions. [2018-11-12 18:35:40,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:35:40,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 218 [2018-11-12 18:35:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:35:40,631 INFO L225 Difference]: With dead ends: 2260 [2018-11-12 18:35:40,631 INFO L226 Difference]: Without dead ends: 1229 [2018-11-12 18:35:40,634 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:35:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2018-11-12 18:35:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1227. [2018-11-12 18:35:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2018-11-12 18:35:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1883 transitions. [2018-11-12 18:35:40,670 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1883 transitions. Word has length 218 [2018-11-12 18:35:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:35:40,670 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 1883 transitions. [2018-11-12 18:35:40,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:35:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1883 transitions. [2018-11-12 18:35:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-11-12 18:35:40,676 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:40,676 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:35:40,677 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:40,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:40,677 INFO L82 PathProgramCache]: Analyzing trace with hash 24877702, now seen corresponding path program 1 times [2018-11-12 18:35:40,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:40,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:40,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:40,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:40,679 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-12 18:35:41,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:35:41,615 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:35:41,615 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 263 with the following transitions: [2018-11-12 18:35:41,617 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:35:41,629 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:35:41,629 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:35:41,775 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:35:42,025 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:35:42,026 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 5 different actions 5 times. Never widened. Performed 3013 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3013 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:35:42,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:42,063 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:35:42,549 INFO L227 lantSequenceWeakener]: Weakened 259 states. On average, predicates are now at 73.78% of their original sizes. [2018-11-12 18:35:42,549 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:35:43,518 INFO L415 sIntCurrentIteration]: We unified 261 AI predicates to 261 [2018-11-12 18:35:43,519 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:35:43,519 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:35:43,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2018-11-12 18:35:43,519 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:35:43,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:35:43,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:35:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:35:43,521 INFO L87 Difference]: Start difference. First operand 1227 states and 1883 transitions. Second operand 11 states. [2018-11-12 18:36:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:00,212 INFO L93 Difference]: Finished difference Result 2453 states and 3929 transitions. [2018-11-12 18:36:00,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 18:36:00,212 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 262 [2018-11-12 18:36:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:00,220 INFO L225 Difference]: With dead ends: 2453 [2018-11-12 18:36:00,220 INFO L226 Difference]: Without dead ends: 1422 [2018-11-12 18:36:00,223 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 270 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-12 18:36:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2018-11-12 18:36:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1418. [2018-11-12 18:36:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2018-11-12 18:36:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 2090 transitions. [2018-11-12 18:36:00,261 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 2090 transitions. Word has length 262 [2018-11-12 18:36:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:00,262 INFO L480 AbstractCegarLoop]: Abstraction has 1418 states and 2090 transitions. [2018-11-12 18:36:00,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:36:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 2090 transitions. [2018-11-12 18:36:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-11-12 18:36:00,267 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:00,268 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:36:00,268 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:00,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash -482257326, now seen corresponding path program 1 times [2018-11-12 18:36:00,268 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:00,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:00,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:00,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:00,270 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 18:36:00,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:36:00,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:36:00,678 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:36:00,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:36:00,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:36:00,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:36:00,679 INFO L87 Difference]: Start difference. First operand 1418 states and 2090 transitions. Second operand 4 states. [2018-11-12 18:36:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:03,112 INFO L93 Difference]: Finished difference Result 3922 states and 6509 transitions. [2018-11-12 18:36:03,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:36:03,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 272 [2018-11-12 18:36:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:03,131 INFO L225 Difference]: With dead ends: 3922 [2018-11-12 18:36:03,132 INFO L226 Difference]: Without dead ends: 2891 [2018-11-12 18:36:03,139 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:36:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2018-11-12 18:36:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2887. [2018-11-12 18:36:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2018-11-12 18:36:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4259 transitions. [2018-11-12 18:36:03,218 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4259 transitions. Word has length 272 [2018-11-12 18:36:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:03,219 INFO L480 AbstractCegarLoop]: Abstraction has 2887 states and 4259 transitions. [2018-11-12 18:36:03,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:36:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4259 transitions. [2018-11-12 18:36:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-11-12 18:36:03,230 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:03,230 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:36:03,231 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:03,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:03,231 INFO L82 PathProgramCache]: Analyzing trace with hash 633050955, now seen corresponding path program 1 times [2018-11-12 18:36:03,231 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:03,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:03,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:03,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:03,233 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-12 18:36:03,469 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:36:03,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 18:36:03,469 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:36:03,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:36:03,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:36:03,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:36:03,476 INFO L87 Difference]: Start difference. First operand 2887 states and 4259 transitions. Second operand 3 states. [2018-11-12 18:36:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:04,730 INFO L93 Difference]: Finished difference Result 7019 states and 10920 transitions. [2018-11-12 18:36:04,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:36:04,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 288 [2018-11-12 18:36:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:04,758 INFO L225 Difference]: With dead ends: 7019 [2018-11-12 18:36:04,758 INFO L226 Difference]: Without dead ends: 4519 [2018-11-12 18:36:04,778 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:36:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2018-11-12 18:36:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 4514. [2018-11-12 18:36:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4514 states. [2018-11-12 18:36:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 6362 transitions. [2018-11-12 18:36:05,435 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 6362 transitions. Word has length 288 [2018-11-12 18:36:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:05,436 INFO L480 AbstractCegarLoop]: Abstraction has 4514 states and 6362 transitions. [2018-11-12 18:36:05,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:36:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 6362 transitions. [2018-11-12 18:36:05,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-11-12 18:36:05,450 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:05,450 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:36:05,450 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:05,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:05,451 INFO L82 PathProgramCache]: Analyzing trace with hash 802470132, now seen corresponding path program 1 times [2018-11-12 18:36:05,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:05,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:05,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:05,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:05,452 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 131 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-12 18:36:06,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:06,397 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:36:06,397 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 294 with the following transitions: [2018-11-12 18:36:06,398 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [578], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:36:06,403 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:36:06,403 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:36:06,537 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:36:07,691 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:36:07,691 INFO L272 AbstractInterpreter]: Visited 141 different actions 828 times. Merged at 7 different actions 39 times. Widened at 1 different actions 1 times. Performed 13280 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13280 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:36:07,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:07,701 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:36:07,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:07,701 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:36:07,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:07,712 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:36:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:07,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:36:08,284 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-11-12 18:36:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:36:08,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:36:08,489 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-12 18:36:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:36:08,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:36:08,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2018-11-12 18:36:08,845 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:36:08,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:36:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:36:08,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-11-12 18:36:08,846 INFO L87 Difference]: Start difference. First operand 4514 states and 6362 transitions. Second operand 11 states. [2018-11-12 18:36:25,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:25,458 INFO L93 Difference]: Finished difference Result 26806 states and 45254 transitions. [2018-11-12 18:36:25,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-12 18:36:25,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 293 [2018-11-12 18:36:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:25,632 INFO L225 Difference]: With dead ends: 26806 [2018-11-12 18:36:25,633 INFO L226 Difference]: Without dead ends: 22679 [2018-11-12 18:36:25,726 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 611 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=939, Invalid=4031, Unknown=0, NotChecked=0, Total=4970 [2018-11-12 18:36:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22679 states. [2018-11-12 18:36:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22679 to 21792. [2018-11-12 18:36:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21792 states. [2018-11-12 18:36:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21792 states to 21792 states and 32964 transitions. [2018-11-12 18:36:26,536 INFO L78 Accepts]: Start accepts. Automaton has 21792 states and 32964 transitions. Word has length 293 [2018-11-12 18:36:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:26,536 INFO L480 AbstractCegarLoop]: Abstraction has 21792 states and 32964 transitions. [2018-11-12 18:36:26,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:36:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 21792 states and 32964 transitions. [2018-11-12 18:36:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-11-12 18:36:26,672 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:26,672 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:36:26,673 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:26,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2097531144, now seen corresponding path program 1 times [2018-11-12 18:36:26,673 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:26,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:26,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:26,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:26,674 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 254 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:36:27,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:27,213 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:36:27,214 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 379 with the following transitions: [2018-11-12 18:36:27,214 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [870], [874], [878], [889], [893], [897], [901], [905], [909], [913], [924], [928], [932], [936], [940], [944], [948], [952], [956], [960], [971], [975], [979], [983], [987], [991], [1002], [1013], [1016], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:36:27,222 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:36:27,223 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:36:27,435 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:36:28,308 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:36:28,308 INFO L272 AbstractInterpreter]: Visited 186 different actions 545 times. Merged at 5 different actions 9 times. Never widened. Performed 10709 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10709 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:36:28,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:28,319 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:36:29,028 INFO L227 lantSequenceWeakener]: Weakened 375 states. On average, predicates are now at 73.59% of their original sizes. [2018-11-12 18:36:29,029 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:36:29,342 INFO L415 sIntCurrentIteration]: We unified 377 AI predicates to 377 [2018-11-12 18:36:29,342 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:36:29,342 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:36:29,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-11-12 18:36:29,342 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:36:29,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-12 18:36:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-12 18:36:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-12 18:36:29,344 INFO L87 Difference]: Start difference. First operand 21792 states and 32964 transitions. Second operand 13 states. [2018-11-12 18:36:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:47,001 INFO L93 Difference]: Finished difference Result 43214 states and 65580 transitions. [2018-11-12 18:36:47,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:36:47,001 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 378 [2018-11-12 18:36:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:47,143 INFO L225 Difference]: With dead ends: 43214 [2018-11-12 18:36:47,143 INFO L226 Difference]: Without dead ends: 21998 [2018-11-12 18:36:47,248 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 387 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-12 18:36:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21998 states. [2018-11-12 18:36:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21998 to 21992. [2018-11-12 18:36:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21992 states. [2018-11-12 18:36:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21992 states to 21992 states and 33172 transitions. [2018-11-12 18:36:48,666 INFO L78 Accepts]: Start accepts. Automaton has 21992 states and 33172 transitions. Word has length 378 [2018-11-12 18:36:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:48,669 INFO L480 AbstractCegarLoop]: Abstraction has 21992 states and 33172 transitions. [2018-11-12 18:36:48,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-12 18:36:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 21992 states and 33172 transitions. [2018-11-12 18:36:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-11-12 18:36:48,724 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:48,725 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 18:36:48,725 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:48,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1286548897, now seen corresponding path program 1 times [2018-11-12 18:36:48,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:48,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:48,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:48,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:48,727 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 372 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-12 18:36:49,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:49,235 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:36:49,235 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 384 with the following transitions: [2018-11-12 18:36:49,235 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [578], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:36:49,239 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:36:49,239 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:36:49,332 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:36:49,635 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:36:49,635 INFO L272 AbstractInterpreter]: Visited 136 different actions 395 times. Merged at 5 different actions 9 times. Never widened. Performed 6528 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6528 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:36:49,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:49,643 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:36:50,065 INFO L227 lantSequenceWeakener]: Weakened 380 states. On average, predicates are now at 73.58% of their original sizes. [2018-11-12 18:36:50,066 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:36:50,167 INFO L415 sIntCurrentIteration]: We unified 382 AI predicates to 382 [2018-11-12 18:36:50,168 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:36:50,168 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:36:50,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-12 18:36:50,168 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:36:50,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:36:50,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:36:50,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:36:50,170 INFO L87 Difference]: Start difference. First operand 21992 states and 33172 transitions. Second operand 11 states. [2018-11-12 18:37:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:37:01,790 INFO L93 Difference]: Finished difference Result 43593 states and 66000 transitions. [2018-11-12 18:37:01,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:37:01,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 383 [2018-11-12 18:37:01,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:37:01,905 INFO L225 Difference]: With dead ends: 43593 [2018-11-12 18:37:01,905 INFO L226 Difference]: Without dead ends: 22377 [2018-11-12 18:37:02,002 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 392 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:37:02,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22377 states. [2018-11-12 18:37:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22377 to 22374. [2018-11-12 18:37:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22374 states. [2018-11-12 18:37:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22374 states to 22374 states and 33587 transitions. [2018-11-12 18:37:02,591 INFO L78 Accepts]: Start accepts. Automaton has 22374 states and 33587 transitions. Word has length 383 [2018-11-12 18:37:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:37:02,591 INFO L480 AbstractCegarLoop]: Abstraction has 22374 states and 33587 transitions. [2018-11-12 18:37:02,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:37:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 22374 states and 33587 transitions. [2018-11-12 18:37:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-11-12 18:37:02,655 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:37:02,655 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:37:02,655 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:37:02,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:02,656 INFO L82 PathProgramCache]: Analyzing trace with hash -110642596, now seen corresponding path program 1 times [2018-11-12 18:37:02,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:37:02,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:02,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:02,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:02,657 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:37:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:03,120 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-11-12 18:37:03,301 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 18:37:03,747 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-12 18:37:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 390 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:37:04,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:04,282 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:37:04,283 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 400 with the following transitions: [2018-11-12 18:37:04,283 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [680], [685], [687], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:37:04,286 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:37:04,286 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:37:04,372 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:37:05,184 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:37:05,185 INFO L272 AbstractInterpreter]: Visited 139 different actions 683 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Performed 10676 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10676 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:37:05,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:05,191 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:37:05,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:05,191 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-12 18:37:05,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:05,200 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:37:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:05,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:37:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 390 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:37:06,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:37:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 390 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:37:06,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:37:06,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 18 [2018-11-12 18:37:06,796 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:37:06,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 18:37:06,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 18:37:06,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-11-12 18:37:06,798 INFO L87 Difference]: Start difference. First operand 22374 states and 33587 transitions. Second operand 16 states. [2018-11-12 18:37:17,048 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2018-11-12 18:37:18,330 WARN L179 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-11-12 18:37:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:37:18,894 INFO L93 Difference]: Finished difference Result 53106 states and 101556 transitions. [2018-11-12 18:37:18,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-12 18:37:18,895 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 399 [2018-11-12 18:37:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:37:19,107 INFO L225 Difference]: With dead ends: 53106 [2018-11-12 18:37:19,108 INFO L226 Difference]: Without dead ends: 31890 [2018-11-12 18:37:19,284 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 830 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=905, Invalid=3255, Unknown=0, NotChecked=0, Total=4160 [2018-11-12 18:37:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31890 states. [2018-11-12 18:37:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31890 to 31182. [2018-11-12 18:37:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31182 states. [2018-11-12 18:37:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31182 states to 31182 states and 46472 transitions. [2018-11-12 18:37:20,274 INFO L78 Accepts]: Start accepts. Automaton has 31182 states and 46472 transitions. Word has length 399 [2018-11-12 18:37:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:37:20,275 INFO L480 AbstractCegarLoop]: Abstraction has 31182 states and 46472 transitions. [2018-11-12 18:37:20,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-12 18:37:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 31182 states and 46472 transitions. [2018-11-12 18:37:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-11-12 18:37:20,326 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:37:20,326 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 18:37:20,326 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:37:20,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1181251602, now seen corresponding path program 1 times [2018-11-12 18:37:20,327 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:37:20,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:20,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:20,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:20,328 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:37:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 372 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-12 18:37:20,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:20,962 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:37:20,962 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 405 with the following transitions: [2018-11-12 18:37:20,962 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [578], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:37:20,965 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:37:20,965 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:37:21,038 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:37:21,591 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:37:21,592 INFO L272 AbstractInterpreter]: Visited 157 different actions 458 times. Merged at 5 different actions 9 times. Never widened. Performed 8768 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8768 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:37:21,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:21,601 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:37:22,262 INFO L227 lantSequenceWeakener]: Weakened 66 states. On average, predicates are now at 73.31% of their original sizes. [2018-11-12 18:37:22,262 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:37:22,613 INFO L415 sIntCurrentIteration]: We unified 403 AI predicates to 403 [2018-11-12 18:37:22,614 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:37:22,614 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:37:22,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [6] total 19 [2018-11-12 18:37:22,614 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:37:22,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-12 18:37:22,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-12 18:37:22,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-11-12 18:37:22,616 INFO L87 Difference]: Start difference. First operand 31182 states and 46472 transitions. Second operand 15 states. [2018-11-12 18:37:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:37:44,601 INFO L93 Difference]: Finished difference Result 62561 states and 93665 transitions. [2018-11-12 18:37:44,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-12 18:37:44,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 404 [2018-11-12 18:37:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:37:44,737 INFO L225 Difference]: With dead ends: 62561 [2018-11-12 18:37:44,738 INFO L226 Difference]: Without dead ends: 32350 [2018-11-12 18:37:44,846 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 413 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2018-11-12 18:37:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32350 states. [2018-11-12 18:37:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32350 to 32338. [2018-11-12 18:37:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32338 states. [2018-11-12 18:37:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32338 states to 32338 states and 47752 transitions. [2018-11-12 18:37:45,562 INFO L78 Accepts]: Start accepts. Automaton has 32338 states and 47752 transitions. Word has length 404 [2018-11-12 18:37:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:37:45,562 INFO L480 AbstractCegarLoop]: Abstraction has 32338 states and 47752 transitions. [2018-11-12 18:37:45,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-12 18:37:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 32338 states and 47752 transitions. [2018-11-12 18:37:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-11-12 18:37:45,613 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:37:45,613 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:37:45,614 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:37:45,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1909449479, now seen corresponding path program 1 times [2018-11-12 18:37:45,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:37:45,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:45,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:45,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:45,615 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:37:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 400 proven. 99 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-12 18:37:46,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:46,034 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:37:46,034 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 415 with the following transitions: [2018-11-12 18:37:46,034 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [629], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [680], [685], [687], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:37:46,038 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:37:46,038 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:37:46,114 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:37:46,388 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:37:46,389 INFO L272 AbstractInterpreter]: Visited 136 different actions 404 times. Merged at 7 different actions 18 times. Never widened. Performed 5398 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5398 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:37:46,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:46,393 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:37:46,842 INFO L227 lantSequenceWeakener]: Weakened 409 states. On average, predicates are now at 75.39% of their original sizes. [2018-11-12 18:37:46,843 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:37:46,954 INFO L415 sIntCurrentIteration]: We unified 413 AI predicates to 413 [2018-11-12 18:37:46,954 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:37:46,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:37:46,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-12 18:37:46,955 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:37:46,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:37:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:37:46,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:37:46,956 INFO L87 Difference]: Start difference. First operand 32338 states and 47752 transitions. Second operand 11 states. [2018-11-12 18:38:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:04,782 INFO L93 Difference]: Finished difference Result 76910 states and 118462 transitions. [2018-11-12 18:38:04,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-12 18:38:04,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 414 [2018-11-12 18:38:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:04,974 INFO L225 Difference]: With dead ends: 76910 [2018-11-12 18:38:04,974 INFO L226 Difference]: Without dead ends: 46890 [2018-11-12 18:38:05,101 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 425 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2018-11-12 18:38:05,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46890 states. [2018-11-12 18:38:05,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46890 to 46500. [2018-11-12 18:38:05,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46500 states. [2018-11-12 18:38:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46500 states to 46500 states and 67202 transitions. [2018-11-12 18:38:06,214 INFO L78 Accepts]: Start accepts. Automaton has 46500 states and 67202 transitions. Word has length 414 [2018-11-12 18:38:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:38:06,215 INFO L480 AbstractCegarLoop]: Abstraction has 46500 states and 67202 transitions. [2018-11-12 18:38:06,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:38:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 46500 states and 67202 transitions. [2018-11-12 18:38:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-11-12 18:38:06,334 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:06,335 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:38:06,335 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:06,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash 451525036, now seen corresponding path program 1 times [2018-11-12 18:38:06,335 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:06,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:06,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:06,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:06,337 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2018-11-12 18:38:08,017 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:38:08,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 18:38:08,018 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:38:08,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:38:08,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:38:08,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:38:08,019 INFO L87 Difference]: Start difference. First operand 46500 states and 67202 transitions. Second operand 3 states. [2018-11-12 18:38:10,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:10,074 INFO L93 Difference]: Finished difference Result 92994 states and 139331 transitions. [2018-11-12 18:38:10,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:38:10,074 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 422 [2018-11-12 18:38:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:10,243 INFO L225 Difference]: With dead ends: 92994 [2018-11-12 18:38:10,243 INFO L226 Difference]: Without dead ends: 48810 [2018-11-12 18:38:10,399 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:38:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48810 states. [2018-11-12 18:38:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48810 to 48610. [2018-11-12 18:38:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48610 states. [2018-11-12 18:38:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48610 states to 48610 states and 69424 transitions. [2018-11-12 18:38:11,395 INFO L78 Accepts]: Start accepts. Automaton has 48610 states and 69424 transitions. Word has length 422 [2018-11-12 18:38:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:38:11,395 INFO L480 AbstractCegarLoop]: Abstraction has 48610 states and 69424 transitions. [2018-11-12 18:38:11,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:38:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 48610 states and 69424 transitions. [2018-11-12 18:38:11,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-11-12 18:38:11,469 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:11,469 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:38:11,470 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:11,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1052569987, now seen corresponding path program 1 times [2018-11-12 18:38:11,470 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:11,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:11,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:11,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:11,471 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 416 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-12 18:38:12,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:38:12,321 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:38:12,321 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 435 with the following transitions: [2018-11-12 18:38:12,321 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [680], [685], [687], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [784], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:38:12,324 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:38:12,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:38:12,390 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:38:13,666 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:38:13,666 INFO L272 AbstractInterpreter]: Visited 144 different actions 707 times. Merged at 8 different actions 38 times. Widened at 1 different actions 1 times. Performed 10916 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10916 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:38:13,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:13,674 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:38:13,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:38:13,674 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-12 18:38:13,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:13,684 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:38:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:13,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:38:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 202 proven. 4 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-11-12 18:38:14,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:38:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 202 proven. 216 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-12 18:38:14,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:38:14,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 21 [2018-11-12 18:38:14,604 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:38:14,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 18:38:14,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 18:38:14,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:38:14,606 INFO L87 Difference]: Start difference. First operand 48610 states and 69424 transitions. Second operand 16 states. [2018-11-12 18:38:16,475 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2018-11-12 18:38:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:30,337 INFO L93 Difference]: Finished difference Result 105805 states and 175853 transitions. [2018-11-12 18:38:30,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-12 18:38:30,338 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 434 [2018-11-12 18:38:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:30,768 INFO L225 Difference]: With dead ends: 105805 [2018-11-12 18:38:30,768 INFO L226 Difference]: Without dead ends: 59510 [2018-11-12 18:38:30,990 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 908 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1354, Invalid=5956, Unknown=0, NotChecked=0, Total=7310 [2018-11-12 18:38:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59510 states. [2018-11-12 18:38:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59510 to 58440. [2018-11-12 18:38:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58440 states. [2018-11-12 18:38:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58440 states to 58440 states and 90216 transitions. [2018-11-12 18:38:33,046 INFO L78 Accepts]: Start accepts. Automaton has 58440 states and 90216 transitions. Word has length 434 [2018-11-12 18:38:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:38:33,047 INFO L480 AbstractCegarLoop]: Abstraction has 58440 states and 90216 transitions. [2018-11-12 18:38:33,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-12 18:38:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 58440 states and 90216 transitions. [2018-11-12 18:38:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-11-12 18:38:33,196 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:33,196 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 18:38:33,197 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:33,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:33,197 INFO L82 PathProgramCache]: Analyzing trace with hash 59986618, now seen corresponding path program 1 times [2018-11-12 18:38:33,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:33,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:33,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:33,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:33,198 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 523 proven. 2 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2018-11-12 18:38:33,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:38:33,918 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:38:33,919 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 459 with the following transitions: [2018-11-12 18:38:33,919 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [578], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:38:33,921 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:38:33,922 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:38:34,007 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:38:35,014 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:38:35,015 INFO L272 AbstractInterpreter]: Visited 128 different actions 626 times. Merged at 8 different actions 34 times. Never widened. Performed 8956 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8956 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:38:35,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:35,040 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:38:35,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:38:35,041 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-12 18:38:35,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:35,056 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:38:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:35,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:38:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 523 proven. 2 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2018-11-12 18:38:36,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:38:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 523 proven. 2 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2018-11-12 18:38:36,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:38:36,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-11-12 18:38:36,637 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:38:36,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 18:38:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 18:38:36,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:38:36,638 INFO L87 Difference]: Start difference. First operand 58440 states and 90216 transitions. Second operand 6 states. Received shutdown request... [2018-11-12 18:38:36,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-12 18:38:36,721 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 18:38:36,727 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 18:38:36,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 06:38:36 BoogieIcfgContainer [2018-11-12 18:38:36,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 18:38:36,729 INFO L168 Benchmark]: Toolchain (without parser) took 213378.39 ms. Allocated memory was 1.5 GB in the beginning and 4.3 GB in the end (delta: 2.8 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-11-12 18:38:36,730 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 18:38:36,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1007.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-12 18:38:36,731 INFO L168 Benchmark]: Boogie Procedure Inliner took 189.73 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -863.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2018-11-12 18:38:36,732 INFO L168 Benchmark]: Boogie Preprocessor took 116.24 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 18:38:36,732 INFO L168 Benchmark]: RCFGBuilder took 4361.55 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 173.0 MB). Peak memory consumption was 173.0 MB. Max. memory is 7.1 GB. [2018-11-12 18:38:36,733 INFO L168 Benchmark]: TraceAbstraction took 207697.33 ms. Allocated memory was 2.3 GB in the beginning and 4.3 GB in the end (delta: 2.0 GB). Free memory was 2.1 GB in the beginning and 2.7 GB in the end (delta: -636.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-12 18:38:36,739 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 1007.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 189.73 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -863.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.24 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4361.55 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 173.0 MB). Peak memory consumption was 173.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207697.33 ms. Allocated memory was 2.3 GB in the beginning and 4.3 GB in the end (delta: 2.0 GB). Free memory was 2.1 GB in the beginning and 2.7 GB in the end (delta: -636.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 195]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 195). Cancelled while BasicCegarLoop was constructing difference of abstraction (58440states) and FLOYD_HOARE automaton (currently 5 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (22 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 207.6s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 166.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3503 SDtfs, 23579 SDslu, 5052 SDs, 0 SdLazy, 44451 SolverSat, 6838 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.3s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 5628 GetRequests, 5275 SyntacticMatches, 8 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5667 ImplicationChecksByTransitivity, 14.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58440occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 8.2s AbstIntTime, 10 AbstIntIterations, 6 AbstIntStrong, 0.9979149358547498 AbsIntWeakeningRatio, 0.09206039941548953 AbsIntAvgWeakeningVarsNumRemoved, 22.23526546517292 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 9.6s AutomataMinimizationTime, 14 MinimizatonAttempts, 3543 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 6424 NumberOfCodeBlocks, 6424 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 7985 ConstructedInterpolants, 0 QuantifiedInterpolants, 11666811 SizeOfPredicates, 5 NumberOfNonLiveVariables, 2585 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 8474/9097 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown