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_label40_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 18:40:25,395 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 18:40:25,402 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 18:40:25,414 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 18:40:25,415 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 18:40:25,416 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 18:40:25,417 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 18:40:25,419 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 18:40:25,421 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 18:40:25,422 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 18:40:25,423 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 18:40:25,430 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 18:40:25,431 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 18:40:25,433 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 18:40:25,437 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 18:40:25,438 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 18:40:25,438 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 18:40:25,441 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 18:40:25,444 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 18:40:25,446 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 18:40:25,447 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 18:40:25,448 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 18:40:25,450 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 18:40:25,450 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 18:40:25,451 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 18:40:25,452 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 18:40:25,453 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 18:40:25,453 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 18:40:25,454 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 18:40:25,455 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 18:40:25,455 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 18:40:25,456 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 18:40:25,456 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 18:40:25,456 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 18:40:25,457 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 18:40:25,458 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 18:40:25,458 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 18:40:25,475 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 18:40:25,475 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 18:40:25,476 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 18:40:25,476 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 18:40:25,476 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 18:40:25,476 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 18:40:25,477 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 18:40:25,477 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 18:40:25,477 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 18:40:25,477 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 18:40:25,477 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 18:40:25,477 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 18:40:25,481 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 18:40:25,482 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 18:40:25,482 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 18:40:25,482 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 18:40:25,482 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 18:40:25,482 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 18:40:25,484 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 18:40:25,485 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 18:40:25,485 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 18:40:25,485 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 18:40:25,485 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 18:40:25,485 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 18:40:25,486 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 18:40:25,486 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:40:25,486 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 18:40:25,486 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 18:40:25,486 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 18:40:25,487 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 18:40:25,488 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 18:40:25,488 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 18:40:25,488 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 18:40:25,488 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 18:40:25,488 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 18:40:25,551 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 18:40:25,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 18:40:25,568 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 18:40:25,570 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 18:40:25,571 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 18:40:25,571 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label40_true-unreach-call.c [2018-11-12 18:40:25,635 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5cbb4600/6f974f22e5ab4840a2df577ceef205a0/FLAG97f5a80c9 [2018-11-12 18:40:26,289 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 18:40:26,290 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label40_true-unreach-call.c [2018-11-12 18:40:26,309 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5cbb4600/6f974f22e5ab4840a2df577ceef205a0/FLAG97f5a80c9 [2018-11-12 18:40:26,325 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5cbb4600/6f974f22e5ab4840a2df577ceef205a0 [2018-11-12 18:40:26,336 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 18:40:26,337 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 18:40:26,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 18:40:26,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 18:40:26,343 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 18:40:26,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:40:26" (1/1) ... [2018-11-12 18:40:26,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d2d05b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:26, skipping insertion in model container [2018-11-12 18:40:26,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:40:26" (1/1) ... [2018-11-12 18:40:26,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 18:40:26,447 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 18:40:27,166 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:40:27,173 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 18:40:27,384 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:40:27,402 INFO L193 MainTranslator]: Completed translation [2018-11-12 18:40:27,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27 WrapperNode [2018-11-12 18:40:27,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 18:40:27,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 18:40:27,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 18:40:27,404 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 18:40:27,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (1/1) ... [2018-11-12 18:40:27,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (1/1) ... [2018-11-12 18:40:27,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 18:40:27,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 18:40:27,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 18:40:27,576 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 18:40:27,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (1/1) ... [2018-11-12 18:40:27,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (1/1) ... [2018-11-12 18:40:27,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (1/1) ... [2018-11-12 18:40:27,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (1/1) ... [2018-11-12 18:40:27,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (1/1) ... [2018-11-12 18:40:27,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (1/1) ... [2018-11-12 18:40:27,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (1/1) ... [2018-11-12 18:40:27,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 18:40:27,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 18:40:27,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 18:40:27,690 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 18:40:27,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (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 18:40:27,765 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 18:40:27,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 18:40:27,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 18:40:27,766 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 18:40:27,766 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 18:40:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 18:40:27,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 18:40:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 18:40:27,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 18:40:32,018 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 18:40:32,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:40:32 BoogieIcfgContainer [2018-11-12 18:40:32,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 18:40:32,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 18:40:32,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 18:40:32,024 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 18:40:32,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 06:40:26" (1/3) ... [2018-11-12 18:40:32,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37822897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:40:32, skipping insertion in model container [2018-11-12 18:40:32,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:40:27" (2/3) ... [2018-11-12 18:40:32,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37822897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:40:32, skipping insertion in model container [2018-11-12 18:40:32,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:40:32" (3/3) ... [2018-11-12 18:40:32,027 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label40_true-unreach-call.c [2018-11-12 18:40:32,038 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 18:40:32,047 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 18:40:32,064 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 18:40:32,103 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 18:40:32,104 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 18:40:32,104 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 18:40:32,104 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 18:40:32,104 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 18:40:32,104 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 18:40:32,105 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 18:40:32,105 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 18:40:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-12 18:40:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-12 18:40:32,151 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:32,154 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:40:32,156 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:32,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1597771487, now seen corresponding path program 1 times [2018-11-12 18:40:32,164 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:32,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:32,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:32,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:32,222 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:32,674 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-12 18:40:32,692 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 18:40:32,695 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:40:32,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:40:32,695 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:32,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:40:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:40:32,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:40:32,724 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-12 18:40:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:36,455 INFO L93 Difference]: Finished difference Result 979 states and 1754 transitions. [2018-11-12 18:40:36,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:40:36,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2018-11-12 18:40:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:36,481 INFO L225 Difference]: With dead ends: 979 [2018-11-12 18:40:36,482 INFO L226 Difference]: Without dead ends: 680 [2018-11-12 18:40:36,492 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:40:36,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-11-12 18:40:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 484. [2018-11-12 18:40:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-11-12 18:40:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 730 transitions. [2018-11-12 18:40:36,601 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 730 transitions. Word has length 51 [2018-11-12 18:40:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:36,602 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 730 transitions. [2018-11-12 18:40:36,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:40:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 730 transitions. [2018-11-12 18:40:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-11-12 18:40:36,615 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:36,615 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:40:36,616 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:36,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:36,616 INFO L82 PathProgramCache]: Analyzing trace with hash 686344627, now seen corresponding path program 1 times [2018-11-12 18:40:36,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:36,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:36,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:36,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:36,620 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:40:36,975 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:40:36,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 18:40:36,975 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:36,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 18:40:36,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 18:40:36,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 18:40:36,979 INFO L87 Difference]: Start difference. First operand 484 states and 730 transitions. Second operand 6 states. [2018-11-12 18:40:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:40,611 INFO L93 Difference]: Finished difference Result 1555 states and 2493 transitions. [2018-11-12 18:40:40,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:40:40,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2018-11-12 18:40:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:40,627 INFO L225 Difference]: With dead ends: 1555 [2018-11-12 18:40:40,628 INFO L226 Difference]: Without dead ends: 1077 [2018-11-12 18:40:40,631 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 18:40:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2018-11-12 18:40:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1063. [2018-11-12 18:40:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2018-11-12 18:40:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1592 transitions. [2018-11-12 18:40:40,700 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1592 transitions. Word has length 124 [2018-11-12 18:40:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:40,702 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 1592 transitions. [2018-11-12 18:40:40,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 18:40:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1592 transitions. [2018-11-12 18:40:40,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-12 18:40:40,709 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:40,715 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:40:40,715 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:40,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:40,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2122174748, now seen corresponding path program 1 times [2018-11-12 18:40:40,716 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:40,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:40,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:40,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:40,717 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:40:40,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:40:40,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:40:40,999 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:41,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:40:41,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:40:41,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:40:41,004 INFO L87 Difference]: Start difference. First operand 1063 states and 1592 transitions. Second operand 4 states. [2018-11-12 18:40:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:43,947 INFO L93 Difference]: Finished difference Result 2907 states and 4465 transitions. [2018-11-12 18:40:43,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:40:43,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2018-11-12 18:40:43,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:43,965 INFO L225 Difference]: With dead ends: 2907 [2018-11-12 18:40:43,966 INFO L226 Difference]: Without dead ends: 1850 [2018-11-12 18:40:43,972 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 18:40:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2018-11-12 18:40:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1646. [2018-11-12 18:40:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2018-11-12 18:40:44,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2436 transitions. [2018-11-12 18:40:44,040 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2436 transitions. Word has length 125 [2018-11-12 18:40:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:44,041 INFO L480 AbstractCegarLoop]: Abstraction has 1646 states and 2436 transitions. [2018-11-12 18:40:44,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:40:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2436 transitions. [2018-11-12 18:40:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-11-12 18:40:44,049 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:44,049 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:40:44,050 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:44,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash -777131457, now seen corresponding path program 1 times [2018-11-12 18:40:44,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:44,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:44,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:44,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:44,052 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:44,673 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 18:40:44,985 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-11-12 18:40:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:40:45,090 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:40:45,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 18:40:45,090 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:45,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:40:45,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:40:45,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:40:45,092 INFO L87 Difference]: Start difference. First operand 1646 states and 2436 transitions. Second operand 7 states. [2018-11-12 18:40:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:40:49,206 INFO L93 Difference]: Finished difference Result 4743 states and 7334 transitions. [2018-11-12 18:40:49,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 18:40:49,219 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 146 [2018-11-12 18:40:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:40:49,245 INFO L225 Difference]: With dead ends: 4743 [2018-11-12 18:40:49,245 INFO L226 Difference]: Without dead ends: 2908 [2018-11-12 18:40:49,260 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-12 18:40:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2018-11-12 18:40:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2759. [2018-11-12 18:40:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2759 states. [2018-11-12 18:40:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2759 states to 2759 states and 3978 transitions. [2018-11-12 18:40:49,367 INFO L78 Accepts]: Start accepts. Automaton has 2759 states and 3978 transitions. Word has length 146 [2018-11-12 18:40:49,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:40:49,368 INFO L480 AbstractCegarLoop]: Abstraction has 2759 states and 3978 transitions. [2018-11-12 18:40:49,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:40:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2759 states and 3978 transitions. [2018-11-12 18:40:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-11-12 18:40:49,376 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:40:49,376 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:40:49,376 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:40:49,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1721682631, now seen corresponding path program 1 times [2018-11-12 18:40:49,377 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:40:49,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:49,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:40:49,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:40:49,378 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:40:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:40:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-12 18:40:49,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:40:49,879 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:40:49,880 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 264 with the following transitions: [2018-11-12 18:40:49,883 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], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [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 18:40:49,935 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:40:49,936 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:40:50,602 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:40:51,091 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:40:51,093 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 5 different actions 5 times. Never widened. Performed 3019 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3019 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 18:40:51,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:40:51,131 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:40:52,018 INFO L227 lantSequenceWeakener]: Weakened 260 states. On average, predicates are now at 73.49% of their original sizes. [2018-11-12 18:40:52,018 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:40:52,870 INFO L415 sIntCurrentIteration]: We unified 262 AI predicates to 262 [2018-11-12 18:40:52,870 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:40:52,871 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:40:52,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2018-11-12 18:40:52,872 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:40:52,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:40:52,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:40:52,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:40:52,873 INFO L87 Difference]: Start difference. First operand 2759 states and 3978 transitions. Second operand 11 states. [2018-11-12 18:41:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:20,004 INFO L93 Difference]: Finished difference Result 5897 states and 8409 transitions. [2018-11-12 18:41:20,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 18:41:20,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 263 [2018-11-12 18:41:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:20,021 INFO L225 Difference]: With dead ends: 5897 [2018-11-12 18:41:20,021 INFO L226 Difference]: Without dead ends: 3144 [2018-11-12 18:41:20,032 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 271 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-12 18:41:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2018-11-12 18:41:20,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3140. [2018-11-12 18:41:20,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2018-11-12 18:41:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4390 transitions. [2018-11-12 18:41:20,126 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4390 transitions. Word has length 263 [2018-11-12 18:41:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:20,127 INFO L480 AbstractCegarLoop]: Abstraction has 3140 states and 4390 transitions. [2018-11-12 18:41:20,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:41:20,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4390 transitions. [2018-11-12 18:41:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-11-12 18:41:20,136 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:20,137 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:41:20,137 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:20,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:20,138 INFO L82 PathProgramCache]: Analyzing trace with hash 84419219, now seen corresponding path program 1 times [2018-11-12 18:41:20,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:20,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:20,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:20,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:20,140 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-12 18:41:21,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:21,692 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:41:21,693 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 274 with the following transitions: [2018-11-12 18:41:21,693 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], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [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 18:41:21,704 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:41:21,704 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:41:21,806 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:41:22,301 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:41:22,301 INFO L272 AbstractInterpreter]: Visited 135 different actions 392 times. Merged at 5 different actions 9 times. Never widened. Performed 5093 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5093 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 18:41:22,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:22,327 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:41:22,746 INFO L227 lantSequenceWeakener]: Weakened 270 states. On average, predicates are now at 73.48% of their original sizes. [2018-11-12 18:41:22,746 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:41:23,278 INFO L415 sIntCurrentIteration]: We unified 272 AI predicates to 272 [2018-11-12 18:41:23,279 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:41:23,279 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:41:23,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2018-11-12 18:41:23,286 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:41:23,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:41:23,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:41:23,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:41:23,287 INFO L87 Difference]: Start difference. First operand 3140 states and 4390 transitions. Second operand 11 states. [2018-11-12 18:41:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:38,280 INFO L93 Difference]: Finished difference Result 6288 states and 8885 transitions. [2018-11-12 18:41:38,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:41:38,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 273 [2018-11-12 18:41:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:38,296 INFO L225 Difference]: With dead ends: 6288 [2018-11-12 18:41:38,296 INFO L226 Difference]: Without dead ends: 3535 [2018-11-12 18:41:38,305 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 282 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:41:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2018-11-12 18:41:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 3525. [2018-11-12 18:41:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3525 states. [2018-11-12 18:41:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 4839 transitions. [2018-11-12 18:41:38,384 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 4839 transitions. Word has length 273 [2018-11-12 18:41:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:38,385 INFO L480 AbstractCegarLoop]: Abstraction has 3525 states and 4839 transitions. [2018-11-12 18:41:38,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:41:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 4839 transitions. [2018-11-12 18:41:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-11-12 18:41:38,393 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:38,393 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:41:38,394 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:38,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:38,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1969010500, now seen corresponding path program 1 times [2018-11-12 18:41:38,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:38,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:38,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:38,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:38,395 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-12 18:41:38,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:41:38,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:41:38,605 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:41:38,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:41:38,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:41:38,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:41:38,606 INFO L87 Difference]: Start difference. First operand 3525 states and 4839 transitions. Second operand 4 states. [2018-11-12 18:41:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:40,713 INFO L93 Difference]: Finished difference Result 9221 states and 14138 transitions. [2018-11-12 18:41:40,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:41:40,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 275 [2018-11-12 18:41:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:40,746 INFO L225 Difference]: With dead ends: 9221 [2018-11-12 18:41:40,746 INFO L226 Difference]: Without dead ends: 6468 [2018-11-12 18:41:40,767 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:41:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2018-11-12 18:41:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 5931. [2018-11-12 18:41:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5931 states. [2018-11-12 18:41:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5931 states to 5931 states and 8381 transitions. [2018-11-12 18:41:40,914 INFO L78 Accepts]: Start accepts. Automaton has 5931 states and 8381 transitions. Word has length 275 [2018-11-12 18:41:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:40,915 INFO L480 AbstractCegarLoop]: Abstraction has 5931 states and 8381 transitions. [2018-11-12 18:41:40,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:41:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5931 states and 8381 transitions. [2018-11-12 18:41:40,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-11-12 18:41:40,928 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:40,929 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:41:40,929 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:40,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1914481691, now seen corresponding path program 1 times [2018-11-12 18:41:40,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:40,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:40,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:40,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:40,931 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:41,906 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 18:41:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 95 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:41:42,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:42,254 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:41:42,254 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 279 with the following transitions: [2018-11-12 18:41:42,256 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], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [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], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:41:42,260 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:41:42,260 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:41:42,372 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:41:43,075 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:41:43,075 INFO L272 AbstractInterpreter]: Visited 141 different actions 409 times. Merged at 5 different actions 9 times. Never widened. Performed 7680 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7680 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 18:41:43,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:43,081 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:41:43,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:43,081 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 18:41:43,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:43,094 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:41:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:43,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:41:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:41:44,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:41:44,536 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-11-12 18:41:45,045 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 18:41:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 89 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:41:45,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:41:45,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2018-11-12 18:41:45,421 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:41:45,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 18:41:45,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 18:41:45,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:41:45,423 INFO L87 Difference]: Start difference. First operand 5931 states and 8381 transitions. Second operand 16 states. [2018-11-12 18:41:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:41:57,670 INFO L93 Difference]: Finished difference Result 16339 states and 33226 transitions. [2018-11-12 18:41:57,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-12 18:41:57,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 278 [2018-11-12 18:41:57,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:41:57,801 INFO L225 Difference]: With dead ends: 16339 [2018-11-12 18:41:57,802 INFO L226 Difference]: Without dead ends: 11180 [2018-11-12 18:41:57,857 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 547 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=944, Invalid=3478, Unknown=0, NotChecked=0, Total=4422 [2018-11-12 18:41:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11180 states. [2018-11-12 18:41:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11180 to 10315. [2018-11-12 18:41:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10315 states. [2018-11-12 18:41:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10315 states to 10315 states and 14918 transitions. [2018-11-12 18:41:58,514 INFO L78 Accepts]: Start accepts. Automaton has 10315 states and 14918 transitions. Word has length 278 [2018-11-12 18:41:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:41:58,515 INFO L480 AbstractCegarLoop]: Abstraction has 10315 states and 14918 transitions. [2018-11-12 18:41:58,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-12 18:41:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 10315 states and 14918 transitions. [2018-11-12 18:41:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-11-12 18:41:58,536 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:41:58,537 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:41:58,537 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:41:58,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:41:58,542 INFO L82 PathProgramCache]: Analyzing trace with hash -527889754, now seen corresponding path program 1 times [2018-11-12 18:41:58,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:41:58,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:58,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:41:58,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:41:58,546 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:41:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:41:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-12 18:41:59,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:41:59,536 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:41:59,536 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 295 with the following transitions: [2018-11-12 18:41:59,536 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], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [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 18:41:59,542 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:41:59,542 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:41:59,629 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:00,268 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:42:00,268 INFO L272 AbstractInterpreter]: Visited 156 different actions 455 times. Merged at 5 different actions 9 times. Never widened. Performed 8686 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8686 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 18:42:00,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:00,278 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:42:01,058 INFO L227 lantSequenceWeakener]: Weakened 80 states. On average, predicates are now at 75.07% of their original sizes. [2018-11-12 18:42:01,058 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:42:01,492 INFO L415 sIntCurrentIteration]: We unified 293 AI predicates to 293 [2018-11-12 18:42:01,492 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:42:01,492 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:42:01,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [7] total 27 [2018-11-12 18:42:01,493 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:42:01,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 18:42:01,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 18:42:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2018-11-12 18:42:01,495 INFO L87 Difference]: Start difference. First operand 10315 states and 14918 transitions. Second operand 22 states. [2018-11-12 18:42:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:40,019 INFO L93 Difference]: Finished difference Result 21168 states and 30608 transitions. [2018-11-12 18:42:40,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-12 18:42:40,019 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 294 [2018-11-12 18:42:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:40,062 INFO L225 Difference]: With dead ends: 21168 [2018-11-12 18:42:40,062 INFO L226 Difference]: Without dead ends: 11430 [2018-11-12 18:42:40,085 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 312 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2018-11-12 18:42:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11430 states. [2018-11-12 18:42:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11430 to 11410. [2018-11-12 18:42:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11410 states. [2018-11-12 18:42:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11410 states to 11410 states and 16154 transitions. [2018-11-12 18:42:40,330 INFO L78 Accepts]: Start accepts. Automaton has 11410 states and 16154 transitions. Word has length 294 [2018-11-12 18:42:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:40,331 INFO L480 AbstractCegarLoop]: Abstraction has 11410 states and 16154 transitions. [2018-11-12 18:42:40,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-12 18:42:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 11410 states and 16154 transitions. [2018-11-12 18:42:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-11-12 18:42:40,347 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:40,348 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:42:40,348 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:40,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:40,348 INFO L82 PathProgramCache]: Analyzing trace with hash 454493284, now seen corresponding path program 1 times [2018-11-12 18:42:40,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:40,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:40,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:40,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:40,350 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 83 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:42:41,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:41,007 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:42:41,007 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 301 with the following transitions: [2018-11-12 18:42:41,008 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], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [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], [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 18:42:41,011 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:42:41,011 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:42:41,113 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:41,910 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:42:41,910 INFO L272 AbstractInterpreter]: Visited 141 different actions 693 times. Merged at 7 different actions 34 times. Widened at 1 different actions 1 times. Performed 10275 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10275 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 5 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:42:41,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:41,918 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:42:41,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:41,918 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 18:42:41,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:41,927 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:42:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:42,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:42:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-12 18:42:42,070 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:42:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-12 18:42:42,221 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:42:42,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 8 [2018-11-12 18:42:42,221 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:42:42,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:42:42,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:42:42,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:42:42,222 INFO L87 Difference]: Start difference. First operand 11410 states and 16154 transitions. Second operand 3 states. [2018-11-12 18:42:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:44,143 INFO L93 Difference]: Finished difference Result 23665 states and 35561 transitions. [2018-11-12 18:42:44,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:42:44,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 300 [2018-11-12 18:42:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:44,191 INFO L225 Difference]: With dead ends: 23665 [2018-11-12 18:42:44,191 INFO L226 Difference]: Without dead ends: 14315 [2018-11-12 18:42:44,221 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 602 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:42:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14315 states. [2018-11-12 18:42:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14315 to 13740. [2018-11-12 18:42:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13740 states. [2018-11-12 18:42:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13740 states to 13740 states and 19527 transitions. [2018-11-12 18:42:44,543 INFO L78 Accepts]: Start accepts. Automaton has 13740 states and 19527 transitions. Word has length 300 [2018-11-12 18:42:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:44,543 INFO L480 AbstractCegarLoop]: Abstraction has 13740 states and 19527 transitions. [2018-11-12 18:42:44,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:42:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 13740 states and 19527 transitions. [2018-11-12 18:42:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-11-12 18:42:44,573 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:44,574 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:42:44,574 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:44,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:44,574 INFO L82 PathProgramCache]: Analyzing trace with hash -463132084, now seen corresponding path program 1 times [2018-11-12 18:42:44,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:44,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:44,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:44,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:44,576 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:45,786 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-12 18:42:46,065 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 18:42:46,540 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-12 18:42:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 237 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:42:47,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:47,145 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:42:47,145 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 354 with the following transitions: [2018-11-12 18:42:47,146 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], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [574], [575], [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 18:42:47,148 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:42:47,148 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:42:47,247 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:48,014 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:42:48,014 INFO L272 AbstractInterpreter]: Visited 127 different actions 751 times. Merged at 8 different actions 48 times. Widened at 1 different actions 1 times. Performed 11885 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11885 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:42:48,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:48,023 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:42:48,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:48,023 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 18:42:48,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:48,033 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:42:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:48,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:42:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 18:42:48,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:42:48,662 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-11-12 18:42:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 18:42:49,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:42:49,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 24 [2018-11-12 18:42:49,423 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:42:49,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 18:42:49,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 18:42:49,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2018-11-12 18:42:49,426 INFO L87 Difference]: Start difference. First operand 13740 states and 19527 transitions. Second operand 22 states. [2018-11-12 18:42:51,113 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2018-11-12 18:42:52,475 WARN L179 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-11-12 18:42:54,265 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2018-11-12 18:42:54,485 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2018-11-12 18:42:54,868 WARN L179 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2018-11-12 18:42:55,052 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2018-11-12 18:42:56,903 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-11-12 18:42:59,039 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2018-11-12 18:43:01,112 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2018-11-12 18:43:04,458 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2018-11-12 18:43:05,348 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2018-11-12 18:43:06,973 WARN L179 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2018-11-12 18:43:08,411 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2018-11-12 18:43:10,244 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2018-11-12 18:43:12,480 WARN L179 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2018-11-12 18:43:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:22,409 INFO L93 Difference]: Finished difference Result 39500 states and 67401 transitions. [2018-11-12 18:43:22,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-11-12 18:43:22,409 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 353 [2018-11-12 18:43:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:22,513 INFO L225 Difference]: With dead ends: 39500 [2018-11-12 18:43:22,514 INFO L226 Difference]: Without dead ends: 22076 [2018-11-12 18:43:22,655 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 791 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7676 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=3515, Invalid=17365, Unknown=0, NotChecked=0, Total=20880 [2018-11-12 18:43:22,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22076 states. [2018-11-12 18:43:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22076 to 20595. [2018-11-12 18:43:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20595 states. [2018-11-12 18:43:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20595 states to 20595 states and 25069 transitions. [2018-11-12 18:43:23,368 INFO L78 Accepts]: Start accepts. Automaton has 20595 states and 25069 transitions. Word has length 353 [2018-11-12 18:43:23,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:23,369 INFO L480 AbstractCegarLoop]: Abstraction has 20595 states and 25069 transitions. [2018-11-12 18:43:23,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-12 18:43:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 20595 states and 25069 transitions. [2018-11-12 18:43:23,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-11-12 18:43:23,397 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:23,398 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 18:43:23,398 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:23,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:23,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1486716189, now seen corresponding path program 1 times [2018-11-12 18:43:23,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:23,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:23,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:23,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:23,400 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:25,048 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 18:43:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 145 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-12 18:43:25,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:25,477 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:43:25,477 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 361 with the following transitions: [2018-11-12 18:43:25,477 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], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [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 18:43:25,480 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:43:25,480 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:43:25,538 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:43:26,471 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:43:26,472 INFO L272 AbstractInterpreter]: Visited 137 different actions 810 times. Merged at 8 different actions 45 times. Widened at 1 different actions 1 times. Performed 13048 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13048 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:43:26,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:26,478 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:43:26,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:26,478 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 18:43:26,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:26,487 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:43:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:26,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:43:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 315 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:43:26,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:43:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 315 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:43:27,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:43:27,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 18 [2018-11-12 18:43:27,463 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:43:27,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 18:43:27,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 18:43:27,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2018-11-12 18:43:27,465 INFO L87 Difference]: Start difference. First operand 20595 states and 25069 transitions. Second operand 16 states. [2018-11-12 18:43:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:42,919 INFO L93 Difference]: Finished difference Result 55349 states and 76958 transitions. [2018-11-12 18:43:42,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-11-12 18:43:42,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 360 [2018-11-12 18:43:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:43,110 INFO L225 Difference]: With dead ends: 55349 [2018-11-12 18:43:43,110 INFO L226 Difference]: Without dead ends: 36298 [2018-11-12 18:43:43,491 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 785 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3228 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1483, Invalid=7637, Unknown=0, NotChecked=0, Total=9120 [2018-11-12 18:43:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36298 states. [2018-11-12 18:43:44,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36298 to 34056. [2018-11-12 18:43:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34056 states. [2018-11-12 18:43:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34056 states to 34056 states and 41684 transitions. [2018-11-12 18:43:44,331 INFO L78 Accepts]: Start accepts. Automaton has 34056 states and 41684 transitions. Word has length 360 [2018-11-12 18:43:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:44,332 INFO L480 AbstractCegarLoop]: Abstraction has 34056 states and 41684 transitions. [2018-11-12 18:43:44,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-12 18:43:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand 34056 states and 41684 transitions. [2018-11-12 18:43:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-11-12 18:43:44,365 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:44,366 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 18:43:44,366 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:44,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:44,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1040560352, now seen corresponding path program 1 times [2018-11-12 18:43:44,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:44,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:44,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:44,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:44,368 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:44,770 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 18:43:45,137 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-12 18:43:45,377 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 18:43:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 146 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:43:46,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:46,223 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:43:46,223 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 376 with the following transitions: [2018-11-12 18:43:46,223 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], [309], [311], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [629], [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 18:43:46,226 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:43:46,226 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:43:46,280 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:43:46,729 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:43:46,730 INFO L272 AbstractInterpreter]: Visited 137 different actions 539 times. Merged at 8 different actions 26 times. Never widened. Performed 7588 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7588 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 18:43:46,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:46,739 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:43:46,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:46,739 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:43:46,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:46,749 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:43:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:46,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:43:55,955 WARN L179 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 508 DAG size of output: 26 [2018-11-12 18:43:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 134 proven. 191 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-12 18:43:57,832 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:43:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 323 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-12 18:43:59,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:43:59,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 5] total 26 [2018-11-12 18:43:59,820 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:43:59,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-12 18:43:59,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-12 18:43:59,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=550, Unknown=2, NotChecked=0, Total=650 [2018-11-12 18:43:59,822 INFO L87 Difference]: Start difference. First operand 34056 states and 41684 transitions. Second operand 24 states. Received shutdown request... [2018-11-12 18:43:59,875 WARN L187 SmtUtils]: Removed 5 from assertion stack [2018-11-12 18:43:59,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:43:59,876 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 18:43:59,880 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 18:43:59,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 06:43:59 BoogieIcfgContainer [2018-11-12 18:43:59,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 18:43:59,881 INFO L168 Benchmark]: Toolchain (without parser) took 213544.88 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 4.3 GB in the end (delta: -2.9 GB). Peak memory consumption was 349.4 MB. Max. memory is 7.1 GB. [2018-11-12 18:43:59,882 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 18:43:59,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1064.61 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: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-11-12 18:43:59,883 INFO L168 Benchmark]: Boogie Procedure Inliner took 171.41 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -849.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2018-11-12 18:43:59,884 INFO L168 Benchmark]: Boogie Preprocessor took 114.18 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 18:43:59,885 INFO L168 Benchmark]: RCFGBuilder took 4329.06 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: 171.2 MB). Peak memory consumption was 171.2 MB. Max. memory is 7.1 GB. [2018-11-12 18:43:59,885 INFO L168 Benchmark]: TraceAbstraction took 207860.22 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 2.1 GB in the beginning and 4.3 GB in the end (delta: -2.2 GB). Peak memory consumption was 221.2 MB. Max. memory is 7.1 GB. [2018-11-12 18:43:59,890 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 1064.61 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: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 171.41 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 753.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -849.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.18 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 4329.06 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: 171.2 MB). Peak memory consumption was 171.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207860.22 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 2.1 GB in the beginning and 4.3 GB in the end (delta: -2.2 GB). Peak memory consumption was 221.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 138]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 138). Cancelled while BasicCegarLoop was constructing difference of abstraction (34056states) and FLOYD_HOARE automaton (currently 3 states, 24 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 207.7s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 161.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3248 SDtfs, 30617 SDslu, 5285 SDs, 0 SdLazy, 47841 SolverSat, 10331 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 75.7s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 4714 GetRequests, 4271 SyntacticMatches, 11 SemanticMatches, 431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12885 ImplicationChecksByTransitivity, 39.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34056occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 6.7s AbstIntTime, 8 AbstIntIterations, 3 AbstIntStrong, 0.9977599499788133 AbsIntWeakeningRatio, 0.10157194679564692 AbsIntAvgWeakeningVarsNumRemoved, 20.342200725513905 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 6297 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 28.4s InterpolantComputationTime, 4883 NumberOfCodeBlocks, 4883 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 6526 ConstructedInterpolants, 14 QuantifiedInterpolants, 15195388 SizeOfPredicates, 13 NumberOfNonLiveVariables, 2822 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 23 InterpolantComputations, 7 PerfectInterpolantSequences, 4240/5721 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown