java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label46_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:37:48,397 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:37:48,399 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:37:48,410 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:37:48,410 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:37:48,411 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:37:48,413 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:37:48,415 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:37:48,416 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:37:48,417 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:37:48,419 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:37:48,419 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:37:48,421 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:37:48,422 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:37:48,425 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:37:48,426 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:37:48,427 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:37:48,428 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:37:48,431 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:37:48,432 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:37:48,433 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:37:48,434 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:37:48,437 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:37:48,437 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:37:48,437 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:37:48,438 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:37:48,439 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:37:48,440 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:37:48,441 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:37:48,442 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:37:48,442 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:37:48,446 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:37:48,447 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:37:48,447 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:37:48,448 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:37:48,450 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:37:48,451 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 20:37:48,482 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:37:48,482 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:37:48,483 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:37:48,483 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:37:48,483 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:37:48,484 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:37:48,484 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:37:48,484 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:37:48,484 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:37:48,484 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:37:48,485 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:37:48,485 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:37:48,485 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:37:48,486 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:37:48,486 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:37:48,487 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:37:48,487 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:37:48,487 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:37:48,487 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:37:48,487 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:37:48,487 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:37:48,488 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:37:48,488 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:37:48,488 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:37:48,488 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:37:48,488 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:37:48,489 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:37:48,489 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:37:48,489 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:37:48,489 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:37:48,489 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:37:48,491 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:37:48,492 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:37:48,492 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:37:48,492 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:37:48,555 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:37:48,572 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:37:48,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:37:48,577 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:37:48,577 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:37:48,578 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label46_true-unreach-call_false-termination.c [2018-11-07 20:37:48,644 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f37ae998/455a5a0a8b4a455fb6d5e36cd0bad36c/FLAG4345ce9a7 [2018-11-07 20:37:49,242 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:37:49,245 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label46_true-unreach-call_false-termination.c [2018-11-07 20:37:49,264 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f37ae998/455a5a0a8b4a455fb6d5e36cd0bad36c/FLAG4345ce9a7 [2018-11-07 20:37:49,285 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f37ae998/455a5a0a8b4a455fb6d5e36cd0bad36c [2018-11-07 20:37:49,296 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:37:49,299 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:37:49,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:37:49,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:37:49,305 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:37:49,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:37:49" (1/1) ... [2018-11-07 20:37:49,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e45d4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:49, skipping insertion in model container [2018-11-07 20:37:49,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:37:49" (1/1) ... [2018-11-07 20:37:49,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:37:49,388 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:37:49,927 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:37:49,933 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:37:50,128 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:37:50,146 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:37:50,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50 WrapperNode [2018-11-07 20:37:50,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:37:50,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:37:50,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:37:50,148 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:37:50,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (1/1) ... [2018-11-07 20:37:50,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (1/1) ... [2018-11-07 20:37:50,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:37:50,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:37:50,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:37:50,305 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:37:50,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (1/1) ... [2018-11-07 20:37:50,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (1/1) ... [2018-11-07 20:37:50,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (1/1) ... [2018-11-07 20:37:50,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (1/1) ... [2018-11-07 20:37:50,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (1/1) ... [2018-11-07 20:37:50,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (1/1) ... [2018-11-07 20:37:50,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (1/1) ... [2018-11-07 20:37:50,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:37:50,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:37:50,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:37:50,390 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:37:50,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:37:50,464 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:37:50,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:37:50,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:37:50,465 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:37:50,465 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:37:50,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:37:50,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:37:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:37:50,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:37:53,988 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:37:53,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:37:53 BoogieIcfgContainer [2018-11-07 20:37:53,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:37:53,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:37:53,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:37:53,993 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:37:53,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:37:49" (1/3) ... [2018-11-07 20:37:53,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa00764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:37:53, skipping insertion in model container [2018-11-07 20:37:53,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:37:50" (2/3) ... [2018-11-07 20:37:53,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa00764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:37:53, skipping insertion in model container [2018-11-07 20:37:53,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:37:53" (3/3) ... [2018-11-07 20:37:53,999 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label46_true-unreach-call_false-termination.c [2018-11-07 20:37:54,008 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:37:54,016 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:37:54,034 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:37:54,073 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:37:54,073 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:37:54,073 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:37:54,073 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:37:54,074 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:37:54,074 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:37:54,074 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:37:54,075 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:37:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 20:37:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-07 20:37:54,112 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:37:54,113 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] [2018-11-07 20:37:54,116 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:37:54,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:54,121 INFO L82 PathProgramCache]: Analyzing trace with hash -956802812, now seen corresponding path program 1 times [2018-11-07 20:37:54,123 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:37:54,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:54,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:37:54,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:54,173 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:37:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:37:54,619 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:37:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:37:54,723 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:37:54,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 20:37:54,724 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:37:54,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:37:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:37:54,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:37:54,751 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 20:37:56,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:37:56,560 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 20:37:56,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:37:56,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2018-11-07 20:37:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:37:56,589 INFO L225 Difference]: With dead ends: 691 [2018-11-07 20:37:56,589 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 20:37:56,597 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:37:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 20:37:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 20:37:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 20:37:56,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 20:37:56,686 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 46 [2018-11-07 20:37:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:37:56,687 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 20:37:56,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:37:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 20:37:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-07 20:37:56,695 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:37:56,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:37:56,696 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:37:56,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash -910572689, now seen corresponding path program 1 times [2018-11-07 20:37:56,697 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:37:56,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:56,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:37:56,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:56,699 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:37:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:37:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:37:57,046 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:37:57,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:37:57,047 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:37:57,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:37:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:37:57,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:37:57,050 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 20:37:59,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:37:59,035 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 20:37:59,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:37:59,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2018-11-07 20:37:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:37:59,042 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 20:37:59,043 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 20:37:59,045 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:37:59,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 20:37:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 20:37:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 20:37:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 20:37:59,082 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 133 [2018-11-07 20:37:59,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:37:59,083 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 20:37:59,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:37:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 20:37:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-07 20:37:59,087 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:37:59,088 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:37:59,088 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:37:59,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:37:59,089 INFO L82 PathProgramCache]: Analyzing trace with hash 156539316, now seen corresponding path program 1 times [2018-11-07 20:37:59,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:37:59,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:59,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:37:59,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:37:59,091 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:37:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:37:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:37:59,251 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:37:59,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:37:59,252 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:37:59,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:37:59,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:37:59,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:37:59,260 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-07 20:38:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:02,948 INFO L93 Difference]: Finished difference Result 2352 states and 4010 transitions. [2018-11-07 20:38:02,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:38:02,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2018-11-07 20:38:02,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:02,968 INFO L225 Difference]: With dead ends: 2352 [2018-11-07 20:38:02,968 INFO L226 Difference]: Without dead ends: 1733 [2018-11-07 20:38:02,975 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 [2018-11-07 20:38:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2018-11-07 20:38:03,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1733. [2018-11-07 20:38:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-11-07 20:38:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2678 transitions. [2018-11-07 20:38:03,064 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2678 transitions. Word has length 142 [2018-11-07 20:38:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:03,064 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 2678 transitions. [2018-11-07 20:38:03,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:38:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2678 transitions. [2018-11-07 20:38:03,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-11-07 20:38:03,084 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:03,084 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 20:38:03,085 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:03,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash -559015785, now seen corresponding path program 1 times [2018-11-07 20:38:03,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:03,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:03,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:03,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:03,087 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:03,719 WARN L179 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-11-07 20:38:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:38:04,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:38:04,041 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:38:04,042 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 266 with the following transitions: [2018-11-07 20:38:04,044 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], [269], [271], [274], [282], [290], [298], [306], [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], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:38:04,093 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:38:04,093 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:38:04,729 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:38:04,731 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:38:04,733 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 20:38:04,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:04,777 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:38:05,436 INFO L227 lantSequenceWeakener]: Weakened 256 states. On average, predicates are now at 77.76% of their original sizes. [2018-11-07 20:38:05,436 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:38:05,791 INFO L415 sIntCurrentIteration]: We unified 264 AI predicates to 264 [2018-11-07 20:38:05,791 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:38:05,792 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:38:05,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-07 20:38:05,792 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:05,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:38:05,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:38:05,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:38:05,796 INFO L87 Difference]: Start difference. First operand 1733 states and 2678 transitions. Second operand 7 states. [2018-11-07 20:38:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:21,952 INFO L93 Difference]: Finished difference Result 3645 states and 5642 transitions. [2018-11-07 20:38:21,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:38:21,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 265 [2018-11-07 20:38:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:21,964 INFO L225 Difference]: With dead ends: 3645 [2018-11-07 20:38:21,964 INFO L226 Difference]: Without dead ends: 1918 [2018-11-07 20:38:21,973 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 265 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:38:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2018-11-07 20:38:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2018-11-07 20:38:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-11-07 20:38:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2869 transitions. [2018-11-07 20:38:22,026 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2869 transitions. Word has length 265 [2018-11-07 20:38:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:22,027 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2869 transitions. [2018-11-07 20:38:22,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:38:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2869 transitions. [2018-11-07 20:38:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-11-07 20:38:22,040 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:22,041 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:38:22,041 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:22,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:22,041 INFO L82 PathProgramCache]: Analyzing trace with hash 211096808, now seen corresponding path program 1 times [2018-11-07 20:38:22,042 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:22,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:22,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:22,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:22,043 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:22,561 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:38:22,765 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:38:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 205 proven. 183 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:38:23,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:38:23,459 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:38:23,459 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 351 with the following transitions: [2018-11-07 20:38:23,460 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], [269], [271], [274], [282], [290], [298], [306], [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], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:38:23,465 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:38:23,466 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:38:23,586 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:38:23,695 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:38:23,696 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:38:23,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:23,733 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:38:24,579 INFO L227 lantSequenceWeakener]: Weakened 159 states. On average, predicates are now at 77.5% of their original sizes. [2018-11-07 20:38:24,580 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:38:25,483 INFO L415 sIntCurrentIteration]: We unified 349 AI predicates to 349 [2018-11-07 20:38:25,483 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:38:25,483 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:38:25,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [12] total 32 [2018-11-07 20:38:25,483 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:25,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 20:38:25,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 20:38:25,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-11-07 20:38:25,485 INFO L87 Difference]: Start difference. First operand 1916 states and 2869 transitions. Second operand 22 states. [2018-11-07 20:38:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:49,669 INFO L93 Difference]: Finished difference Result 4614 states and 6705 transitions. [2018-11-07 20:38:49,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 20:38:49,669 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 350 [2018-11-07 20:38:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:49,681 INFO L225 Difference]: With dead ends: 4614 [2018-11-07 20:38:49,681 INFO L226 Difference]: Without dead ends: 2286 [2018-11-07 20:38:49,690 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 358 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2018-11-07 20:38:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2018-11-07 20:38:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2284. [2018-11-07 20:38:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2018-11-07 20:38:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3245 transitions. [2018-11-07 20:38:49,751 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3245 transitions. Word has length 350 [2018-11-07 20:38:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:49,751 INFO L480 AbstractCegarLoop]: Abstraction has 2284 states and 3245 transitions. [2018-11-07 20:38:49,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 20:38:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3245 transitions. [2018-11-07 20:38:49,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-11-07 20:38:49,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:49,764 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 20:38:49,764 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:49,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:49,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1946507268, now seen corresponding path program 1 times [2018-11-07 20:38:49,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:49,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:49,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:49,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:49,766 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:50,265 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:38:50,457 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:38:50,688 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:38:51,519 WARN L179 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-11-07 20:38:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 130 proven. 305 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:38:51,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:38:51,920 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:38:51,921 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 377 with the following transitions: [2018-11-07 20:38:51,921 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], [269], [271], [274], [282], [290], [298], [306], [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], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:38:51,926 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:38:51,926 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:38:51,984 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:38:52,059 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:38:52,059 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:38:52,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:52,066 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:38:52,433 INFO L227 lantSequenceWeakener]: Weakened 151 states. On average, predicates are now at 78.44% of their original sizes. [2018-11-07 20:38:52,433 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:38:52,982 INFO L415 sIntCurrentIteration]: We unified 375 AI predicates to 375 [2018-11-07 20:38:52,983 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:38:52,983 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:38:52,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-07 20:38:52,984 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:52,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 20:38:52,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 20:38:52,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:38:52,986 INFO L87 Difference]: Start difference. First operand 2284 states and 3245 transitions. Second operand 21 states. [2018-11-07 20:39:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:03,471 INFO L93 Difference]: Finished difference Result 4384 states and 6504 transitions. [2018-11-07 20:39:03,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:39:03,471 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 376 [2018-11-07 20:39:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:03,483 INFO L225 Difference]: With dead ends: 4384 [2018-11-07 20:39:03,484 INFO L226 Difference]: Without dead ends: 2657 [2018-11-07 20:39:03,493 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 393 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-07 20:39:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2018-11-07 20:39:03,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2652. [2018-11-07 20:39:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2018-11-07 20:39:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3641 transitions. [2018-11-07 20:39:03,560 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3641 transitions. Word has length 376 [2018-11-07 20:39:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:03,561 INFO L480 AbstractCegarLoop]: Abstraction has 2652 states and 3641 transitions. [2018-11-07 20:39:03,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 20:39:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3641 transitions. [2018-11-07 20:39:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-11-07 20:39:03,573 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:03,574 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 20:39:03,574 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:03,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:03,575 INFO L82 PathProgramCache]: Analyzing trace with hash -817176592, now seen corresponding path program 1 times [2018-11-07 20:39:03,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:03,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:03,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:03,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:03,576 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:04,093 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:39:04,288 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:39:04,521 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:39:04,927 WARN L179 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-07 20:39:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 233 proven. 204 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:39:05,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:05,387 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:05,387 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 387 with the following transitions: [2018-11-07 20:39:05,387 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], [269], [271], [274], [282], [290], [298], [306], [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], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [698], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:05,391 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:05,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:05,476 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:05,961 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:05,961 INFO L272 AbstractInterpreter]: Visited 130 different actions 256 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:39:05,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:05,970 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:06,476 INFO L227 lantSequenceWeakener]: Weakened 97 states. On average, predicates are now at 77.65% of their original sizes. [2018-11-07 20:39:06,477 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:07,049 INFO L415 sIntCurrentIteration]: We unified 385 AI predicates to 385 [2018-11-07 20:39:07,049 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:07,050 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:07,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [12] total 27 [2018-11-07 20:39:07,050 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:07,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 20:39:07,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 20:39:07,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-11-07 20:39:07,051 INFO L87 Difference]: Start difference. First operand 2652 states and 3641 transitions. Second operand 17 states. [2018-11-07 20:39:23,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:23,061 INFO L93 Difference]: Finished difference Result 5170 states and 7288 transitions. [2018-11-07 20:39:23,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-07 20:39:23,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 386 [2018-11-07 20:39:23,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:23,073 INFO L225 Difference]: With dead ends: 5170 [2018-11-07 20:39:23,074 INFO L226 Difference]: Without dead ends: 2842 [2018-11-07 20:39:23,082 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 392 GetRequests, 364 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2018-11-07 20:39:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-11-07 20:39:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2654. [2018-11-07 20:39:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2018-11-07 20:39:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3642 transitions. [2018-11-07 20:39:23,144 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3642 transitions. Word has length 386 [2018-11-07 20:39:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:23,145 INFO L480 AbstractCegarLoop]: Abstraction has 2654 states and 3642 transitions. [2018-11-07 20:39:23,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 20:39:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3642 transitions. [2018-11-07 20:39:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-11-07 20:39:23,154 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:23,155 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:39:23,155 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:23,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:23,156 INFO L82 PathProgramCache]: Analyzing trace with hash -558652053, now seen corresponding path program 1 times [2018-11-07 20:39:23,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:23,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:23,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:23,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:23,157 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:23,622 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:39:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 217 proven. 220 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:39:24,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:24,246 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:24,246 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 412 with the following transitions: [2018-11-07 20:39:24,246 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], [269], [271], [274], [282], [290], [298], [306], [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], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [798], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:24,249 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:24,249 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:24,319 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:24,514 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:24,515 INFO L272 AbstractInterpreter]: Visited 155 different actions 303 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:39:24,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:24,560 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:25,161 INFO L227 lantSequenceWeakener]: Weakened 101 states. On average, predicates are now at 77.63% of their original sizes. [2018-11-07 20:39:25,161 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:26,079 INFO L415 sIntCurrentIteration]: We unified 410 AI predicates to 410 [2018-11-07 20:39:26,080 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:26,080 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:26,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [13] total 30 [2018-11-07 20:39:26,080 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:26,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 20:39:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 20:39:26,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-11-07 20:39:26,082 INFO L87 Difference]: Start difference. First operand 2654 states and 3642 transitions. Second operand 19 states. [2018-11-07 20:39:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:47,944 INFO L93 Difference]: Finished difference Result 5170 states and 7288 transitions. [2018-11-07 20:39:47,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 20:39:47,944 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 411 [2018-11-07 20:39:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:47,954 INFO L225 Difference]: With dead ends: 5170 [2018-11-07 20:39:47,955 INFO L226 Difference]: Without dead ends: 2842 [2018-11-07 20:39:47,962 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 419 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2018-11-07 20:39:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-11-07 20:39:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2654. [2018-11-07 20:39:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2018-11-07 20:39:48,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3642 transitions. [2018-11-07 20:39:48,027 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3642 transitions. Word has length 411 [2018-11-07 20:39:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:48,028 INFO L480 AbstractCegarLoop]: Abstraction has 2654 states and 3642 transitions. [2018-11-07 20:39:48,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 20:39:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3642 transitions. [2018-11-07 20:39:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-11-07 20:39:48,038 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:48,038 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:39:48,038 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:48,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash 969826652, now seen corresponding path program 1 times [2018-11-07 20:39:48,039 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:48,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:48,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:48,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:48,040 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:48,564 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:39:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 204 proven. 233 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:39:49,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:49,161 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:49,161 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 425 with the following transitions: [2018-11-07 20:39:49,161 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], [269], [271], [274], [282], [290], [298], [306], [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], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [850], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:49,164 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:49,164 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:49,229 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:49,430 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:49,430 INFO L272 AbstractInterpreter]: Visited 168 different actions 329 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:39:49,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:49,435 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:50,010 INFO L227 lantSequenceWeakener]: Weakened 97 states. On average, predicates are now at 77.65% of their original sizes. [2018-11-07 20:39:50,011 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:50,696 INFO L415 sIntCurrentIteration]: We unified 423 AI predicates to 423 [2018-11-07 20:39:50,696 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:50,696 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:50,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [12] total 28 [2018-11-07 20:39:50,697 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:50,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 20:39:50,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 20:39:50,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-11-07 20:39:50,698 INFO L87 Difference]: Start difference. First operand 2654 states and 3642 transitions. Second operand 18 states. [2018-11-07 20:40:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:40:14,335 INFO L93 Difference]: Finished difference Result 5170 states and 7288 transitions. [2018-11-07 20:40:14,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-07 20:40:14,335 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 424 [2018-11-07 20:40:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:40:14,346 INFO L225 Difference]: With dead ends: 5170 [2018-11-07 20:40:14,346 INFO L226 Difference]: Without dead ends: 2842 [2018-11-07 20:40:14,353 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 432 GetRequests, 401 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2018-11-07 20:40:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2018-11-07 20:40:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2654. [2018-11-07 20:40:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2018-11-07 20:40:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3642 transitions. [2018-11-07 20:40:14,843 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3642 transitions. Word has length 424 [2018-11-07 20:40:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:40:14,844 INFO L480 AbstractCegarLoop]: Abstraction has 2654 states and 3642 transitions. [2018-11-07 20:40:14,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 20:40:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3642 transitions. [2018-11-07 20:40:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-11-07 20:40:14,853 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:40:14,853 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:40:14,854 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:40:14,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:14,854 INFO L82 PathProgramCache]: Analyzing trace with hash 105185204, now seen corresponding path program 1 times [2018-11-07 20:40:14,854 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:40:14,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:14,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:14,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:14,855 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:40:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 192 proven. 245 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:40:15,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:15,901 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:40:15,901 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 437 with the following transitions: [2018-11-07 20:40:15,901 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], [269], [271], [274], [282], [290], [298], [306], [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], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [898], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:40:15,903 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:40:15,903 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:40:15,969 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:40:16,179 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:40:16,179 INFO L272 AbstractInterpreter]: Visited 180 different actions 353 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:40:16,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:16,191 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:40:16,748 INFO L227 lantSequenceWeakener]: Weakened 97 states. On average, predicates are now at 77.65% of their original sizes. [2018-11-07 20:40:16,749 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:40:17,360 INFO L415 sIntCurrentIteration]: We unified 435 AI predicates to 435 [2018-11-07 20:40:17,360 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:40:17,360 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:40:17,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [14] total 30 [2018-11-07 20:40:17,361 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:40:17,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 20:40:17,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 20:40:17,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-11-07 20:40:17,363 INFO L87 Difference]: Start difference. First operand 2654 states and 3642 transitions. Second operand 18 states. [2018-11-07 20:40:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:40:34,912 INFO L93 Difference]: Finished difference Result 5168 states and 7286 transitions. [2018-11-07 20:40:34,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-07 20:40:34,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 436 [2018-11-07 20:40:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:40:34,920 INFO L225 Difference]: With dead ends: 5168 [2018-11-07 20:40:34,920 INFO L226 Difference]: Without dead ends: 2840 [2018-11-07 20:40:34,926 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 443 GetRequests, 413 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2018-11-07 20:40:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2018-11-07 20:40:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2652. [2018-11-07 20:40:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2018-11-07 20:40:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3640 transitions. [2018-11-07 20:40:34,975 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3640 transitions. Word has length 436 [2018-11-07 20:40:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:40:34,976 INFO L480 AbstractCegarLoop]: Abstraction has 2652 states and 3640 transitions. [2018-11-07 20:40:34,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 20:40:34,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3640 transitions. [2018-11-07 20:40:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2018-11-07 20:40:34,985 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:40:34,986 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:40:34,986 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:40:34,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:34,986 INFO L82 PathProgramCache]: Analyzing trace with hash -744542557, now seen corresponding path program 1 times [2018-11-07 20:40:34,986 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:40:34,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:34,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:34,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:34,988 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:40:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 249 proven. 166 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2018-11-07 20:40:37,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:37,890 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:40:37,891 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 462 with the following transitions: [2018-11-07 20:40:37,891 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], [269], [271], [274], [282], [290], [298], [306], [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], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:40:37,893 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:40:37,893 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:40:37,956 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:40:38,159 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:40:38,159 INFO L272 AbstractInterpreter]: Visited 123 different actions 367 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 20:40:38,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:38,168 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:40:38,797 INFO L227 lantSequenceWeakener]: Weakened 159 states. On average, predicates are now at 77.5% of their original sizes. [2018-11-07 20:40:38,798 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:40:39,309 INFO L415 sIntCurrentIteration]: We unified 460 AI predicates to 460 [2018-11-07 20:40:39,310 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:40:39,310 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:40:39,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [6] total 27 [2018-11-07 20:40:39,310 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:40:39,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-07 20:40:39,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-07 20:40:39,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2018-11-07 20:40:39,311 INFO L87 Difference]: Start difference. First operand 2652 states and 3640 transitions. Second operand 23 states. [2018-11-07 20:41:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:41:04,731 INFO L93 Difference]: Finished difference Result 5361 states and 7477 transitions. [2018-11-07 20:41:04,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 20:41:04,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 461 [2018-11-07 20:41:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:41:04,742 INFO L225 Difference]: With dead ends: 5361 [2018-11-07 20:41:04,742 INFO L226 Difference]: Without dead ends: 3033 [2018-11-07 20:41:04,750 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 477 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=1255, Unknown=0, NotChecked=0, Total=1560 [2018-11-07 20:41:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2018-11-07 20:41:04,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2842. [2018-11-07 20:41:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2018-11-07 20:41:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3828 transitions. [2018-11-07 20:41:04,804 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3828 transitions. Word has length 461 [2018-11-07 20:41:04,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:41:04,805 INFO L480 AbstractCegarLoop]: Abstraction has 2842 states and 3828 transitions. [2018-11-07 20:41:04,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-07 20:41:04,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3828 transitions. [2018-11-07 20:41:04,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2018-11-07 20:41:04,816 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:41:04,816 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:41:04,816 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:41:04,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2024595012, now seen corresponding path program 1 times [2018-11-07 20:41:04,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:41:04,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:04,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:41:04,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:04,818 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:41:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:41:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 267 proven. 471 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:41:06,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:41:06,074 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:41:06,074 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 465 with the following transitions: [2018-11-07 20:41:06,075 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], [269], [271], [274], [282], [290], [298], [306], [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], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:41:06,076 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:41:06,076 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:41:06,121 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:41:06,276 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:41:06,276 INFO L272 AbstractInterpreter]: Visited 123 different actions 364 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:41:06,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:06,287 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:41:06,725 INFO L227 lantSequenceWeakener]: Weakened 116 states. On average, predicates are now at 77.55% of their original sizes. [2018-11-07 20:41:06,725 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:41:07,233 INFO L415 sIntCurrentIteration]: We unified 463 AI predicates to 463 [2018-11-07 20:41:07,233 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:41:07,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:41:07,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [15] total 33 [2018-11-07 20:41:07,234 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:41:07,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:41:07,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:41:07,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:41:07,235 INFO L87 Difference]: Start difference. First operand 2842 states and 3828 transitions. Second operand 20 states. [2018-11-07 20:41:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:41:33,045 INFO L93 Difference]: Finished difference Result 5243 states and 7328 transitions. [2018-11-07 20:41:33,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-07 20:41:33,045 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 464 [2018-11-07 20:41:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:41:33,055 INFO L225 Difference]: With dead ends: 5243 [2018-11-07 20:41:33,055 INFO L226 Difference]: Without dead ends: 3035 [2018-11-07 20:41:33,061 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 478 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 20:41:33,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2018-11-07 20:41:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2660. [2018-11-07 20:41:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2660 states. [2018-11-07 20:41:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2660 states to 2660 states and 3645 transitions. [2018-11-07 20:41:33,112 INFO L78 Accepts]: Start accepts. Automaton has 2660 states and 3645 transitions. Word has length 464 [2018-11-07 20:41:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:41:33,112 INFO L480 AbstractCegarLoop]: Abstraction has 2660 states and 3645 transitions. [2018-11-07 20:41:33,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:41:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2660 states and 3645 transitions. [2018-11-07 20:41:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-11-07 20:41:33,122 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:41:33,122 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:41:33,123 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:41:33,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:33,123 INFO L82 PathProgramCache]: Analyzing trace with hash 110689967, now seen corresponding path program 1 times [2018-11-07 20:41:33,123 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:41:33,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:33,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:41:33,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:33,124 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:41:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:41:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 286 proven. 508 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:41:34,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:41:34,642 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:41:34,642 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 484 with the following transitions: [2018-11-07 20:41:34,642 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], [269], [271], [274], [282], [290], [298], [306], [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], [619], [623], [627], [631], [635], [638], [639], [642], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:41:34,644 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:41:34,644 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:41:34,689 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:41:34,884 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:41:34,884 INFO L272 AbstractInterpreter]: Visited 123 different actions 364 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:41:34,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:34,892 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:41:35,519 INFO L227 lantSequenceWeakener]: Weakened 141 states. On average, predicates are now at 77.53% of their original sizes. [2018-11-07 20:41:35,519 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:41:35,842 INFO L415 sIntCurrentIteration]: We unified 482 AI predicates to 482 [2018-11-07 20:41:35,843 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:41:35,843 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:41:35,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 30 [2018-11-07 20:41:35,844 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:41:35,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 20:41:35,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 20:41:35,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-11-07 20:41:35,845 INFO L87 Difference]: Start difference. First operand 2660 states and 3645 transitions. Second operand 17 states. Received shutdown request... [2018-11-07 20:41:38,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 20:41:38,197 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:41:38,202 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:41:38,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:41:38 BoogieIcfgContainer [2018-11-07 20:41:38,202 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:41:38,203 INFO L168 Benchmark]: Toolchain (without parser) took 228905.29 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -344.5 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2018-11-07 20:41:38,204 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:41:38,204 INFO L168 Benchmark]: CACSL2BoogieTranslator took 847.63 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-11-07 20:41:38,205 INFO L168 Benchmark]: Boogie Procedure Inliner took 157.05 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 724.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -820.7 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2018-11-07 20:41:38,206 INFO L168 Benchmark]: Boogie Preprocessor took 83.90 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:41:38,206 INFO L168 Benchmark]: RCFGBuilder took 3599.71 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 133.7 MB). Peak memory consumption was 133.7 MB. Max. memory is 7.1 GB. [2018-11-07 20:41:38,207 INFO L168 Benchmark]: TraceAbstraction took 224212.17 ms. Allocated memory was 2.2 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 1.8 GB in the end (delta: 289.7 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2018-11-07 20:41:38,213 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 847.63 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 157.05 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 724.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -820.7 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.90 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3599.71 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 133.7 MB). Peak memory consumption was 133.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224212.17 ms. Allocated memory was 2.2 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 1.8 GB in the end (delta: 289.7 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 121). Cancelled while BasicCegarLoop was constructing difference of abstraction (2660states) and FLOYD_HOARE automaton (currently 12 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (115 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 224.1s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 191.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2502 SDtfs, 26906 SDslu, 2175 SDs, 0 SdLazy, 31249 SolverSat, 2850 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60.3s Time, PredicateUnifierStatistics: 20 DeclaredPredicates, 4164 GetRequests, 3873 SyntacticMatches, 21 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 7.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2842occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.3s AbstIntTime, 10 AbstIntIterations, 10 AbstIntStrong, 0.9974325466061806 AbsIntWeakeningRatio, 0.08205635195254572 AbsIntAvgWeakeningVarsNumRemoved, 11.824270884824518 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 1336 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 4377 NumberOfCodeBlocks, 4377 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 4364 ConstructedInterpolants, 0 QuantifiedInterpolants, 17606174 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 2503/5139 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown