java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label21_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:58:17,345 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:58:17,347 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:58:17,360 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:58:17,360 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:58:17,362 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:58:17,363 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:58:17,365 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:58:17,367 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:58:17,368 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:58:17,369 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:58:17,369 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:58:17,370 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:58:17,371 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:58:17,372 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:58:17,373 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:58:17,374 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:58:17,376 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:58:17,378 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:58:17,380 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:58:17,381 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:58:17,382 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:58:17,384 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:58:17,385 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:58:17,385 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:58:17,386 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:58:17,387 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:58:17,388 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:58:17,388 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:58:17,390 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:58:17,390 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:58:17,390 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 14:58:17,391 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:58:17,391 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:58:17,392 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:58:17,393 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:58:17,393 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 14:58:17,417 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:58:17,418 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:58:17,418 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:58:17,419 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:58:17,419 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:58:17,419 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:58:17,419 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:58:17,419 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:58:17,420 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:58:17,420 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:58:17,420 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:58:17,420 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:58:17,421 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:58:17,421 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:58:17,421 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:58:17,421 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:58:17,422 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:58:17,423 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:58:17,423 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:58:17,423 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:58:17,423 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:58:17,423 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:58:17,424 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:58:17,424 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:58:17,424 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:58:17,424 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:58:17,424 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:58:17,425 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:58:17,425 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:58:17,425 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:58:17,426 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:58:17,426 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:58:17,426 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:58:17,426 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:58:17,480 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:58:17,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:58:17,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:58:17,500 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:58:17,500 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:58:17,501 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label21_true-unreach-call.c [2018-10-27 14:58:17,558 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e4137ac9c/cd3964fc322546d680d2835cda981d92/FLAG52ecb02ff [2018-10-27 14:58:18,210 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:58:18,211 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label21_true-unreach-call.c [2018-10-27 14:58:18,239 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e4137ac9c/cd3964fc322546d680d2835cda981d92/FLAG52ecb02ff [2018-10-27 14:58:18,261 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e4137ac9c/cd3964fc322546d680d2835cda981d92 [2018-10-27 14:58:18,275 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:58:18,277 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:58:18,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:58:18,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:58:18,287 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:58:18,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:58:18" (1/1) ... [2018-10-27 14:58:18,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b51a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:18, skipping insertion in model container [2018-10-27 14:58:18,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:58:18" (1/1) ... [2018-10-27 14:58:18,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:58:18,426 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:58:19,388 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:58:19,394 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:58:19,786 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:58:19,809 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:58:19,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19 WrapperNode [2018-10-27 14:58:19,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:58:19,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:58:19,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:58:19,811 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:58:19,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (1/1) ... [2018-10-27 14:58:19,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (1/1) ... [2018-10-27 14:58:20,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:58:20,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:58:20,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:58:20,291 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:58:20,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (1/1) ... [2018-10-27 14:58:20,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (1/1) ... [2018-10-27 14:58:20,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (1/1) ... [2018-10-27 14:58:20,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (1/1) ... [2018-10-27 14:58:20,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (1/1) ... [2018-10-27 14:58:20,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (1/1) ... [2018-10-27 14:58:20,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (1/1) ... [2018-10-27 14:58:20,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:58:20,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:58:20,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:58:20,593 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:58:20,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:58:20,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:58:20,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:58:20,665 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 14:58:20,665 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 14:58:20,665 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:58:20,665 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:58:20,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:58:20,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:58:20,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:58:20,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:58:32,410 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:58:32,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:58:32 BoogieIcfgContainer [2018-10-27 14:58:32,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:58:32,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:58:32,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:58:32,416 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:58:32,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:58:18" (1/3) ... [2018-10-27 14:58:32,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702ca59c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:58:32, skipping insertion in model container [2018-10-27 14:58:32,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:58:19" (2/3) ... [2018-10-27 14:58:32,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702ca59c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:58:32, skipping insertion in model container [2018-10-27 14:58:32,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:58:32" (3/3) ... [2018-10-27 14:58:32,420 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label21_true-unreach-call.c [2018-10-27 14:58:32,430 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:58:32,440 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:58:32,457 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:58:32,501 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:58:32,501 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:58:32,502 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:58:32,502 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:58:32,502 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:58:32,502 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:58:32,502 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:58:32,502 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:58:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 14:58:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-27 14:58:32,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:58:32,548 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:58:32,551 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:58:32,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:32,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1861558100, now seen corresponding path program 1 times [2018-10-27 14:58:32,560 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:58:32,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:32,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:32,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:32,612 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:58:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:58:33,155 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:58:33,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:58:33,155 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:58:33,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:58:33,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:58:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:58:33,182 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 14:58:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:58:43,652 INFO L93 Difference]: Finished difference Result 2166 states and 4013 transitions. [2018-10-27 14:58:43,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:58:43,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2018-10-27 14:58:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:58:43,711 INFO L225 Difference]: With dead ends: 2166 [2018-10-27 14:58:43,712 INFO L226 Difference]: Without dead ends: 1556 [2018-10-27 14:58:43,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:58:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2018-10-27 14:58:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1068. [2018-10-27 14:58:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-10-27 14:58:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1850 transitions. [2018-10-27 14:58:43,889 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1850 transitions. Word has length 66 [2018-10-27 14:58:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:58:43,890 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1850 transitions. [2018-10-27 14:58:43,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:58:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1850 transitions. [2018-10-27 14:58:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-27 14:58:43,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:58:43,905 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:58:43,905 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:58:43,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash -436141222, now seen corresponding path program 1 times [2018-10-27 14:58:43,906 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:58:43,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:43,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:43,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:43,908 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:58:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:58:44,400 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:58:44,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:58:44,400 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:58:44,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:58:44,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:58:44,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:58:44,403 INFO L87 Difference]: Start difference. First operand 1068 states and 1850 transitions. Second operand 6 states. [2018-10-27 14:58:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:58:55,018 INFO L93 Difference]: Finished difference Result 3059 states and 5419 transitions. [2018-10-27 14:58:55,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:58:55,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2018-10-27 14:58:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:58:55,034 INFO L225 Difference]: With dead ends: 3059 [2018-10-27 14:58:55,034 INFO L226 Difference]: Without dead ends: 1997 [2018-10-27 14:58:55,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 14:58:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2018-10-27 14:58:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1975. [2018-10-27 14:58:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2018-10-27 14:58:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3181 transitions. [2018-10-27 14:58:55,110 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3181 transitions. Word has length 142 [2018-10-27 14:58:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:58:55,111 INFO L481 AbstractCegarLoop]: Abstraction has 1975 states and 3181 transitions. [2018-10-27 14:58:55,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:58:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3181 transitions. [2018-10-27 14:58:55,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-27 14:58:55,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:58:55,116 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:58:55,117 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:58:55,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:55,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1261890222, now seen corresponding path program 1 times [2018-10-27 14:58:55,117 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:58:55,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:55,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:55,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:55,119 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:58:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:58:55,323 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:58:55,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 14:58:55,323 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:58:55,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:58:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:58:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 14:58:55,325 INFO L87 Difference]: Start difference. First operand 1975 states and 3181 transitions. Second operand 6 states. [2018-10-27 14:59:00,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:59:00,573 INFO L93 Difference]: Finished difference Result 4880 states and 7834 transitions. [2018-10-27 14:59:00,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:59:00,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2018-10-27 14:59:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:59:00,592 INFO L225 Difference]: With dead ends: 4880 [2018-10-27 14:59:00,592 INFO L226 Difference]: Without dead ends: 2911 [2018-10-27 14:59:00,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 14:59:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2018-10-27 14:59:00,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2880. [2018-10-27 14:59:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-10-27 14:59:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3936 transitions. [2018-10-27 14:59:00,685 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3936 transitions. Word has length 146 [2018-10-27 14:59:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:59:00,685 INFO L481 AbstractCegarLoop]: Abstraction has 2880 states and 3936 transitions. [2018-10-27 14:59:00,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:59:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3936 transitions. [2018-10-27 14:59:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-27 14:59:00,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:59:00,689 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:59:00,689 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:59:00,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:59:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1548926097, now seen corresponding path program 1 times [2018-10-27 14:59:00,690 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:59:00,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:00,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:59:00,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:00,691 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:59:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:59:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:59:00,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:59:00,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:59:00,989 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:59:00,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:59:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:59:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:59:00,990 INFO L87 Difference]: Start difference. First operand 2880 states and 3936 transitions. Second operand 4 states. [2018-10-27 14:59:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:59:06,627 INFO L93 Difference]: Finished difference Result 5754 states and 7882 transitions. [2018-10-27 14:59:06,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:59:06,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2018-10-27 14:59:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:59:06,641 INFO L225 Difference]: With dead ends: 5754 [2018-10-27 14:59:06,642 INFO L226 Difference]: Without dead ends: 2880 [2018-10-27 14:59:06,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:59:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2018-10-27 14:59:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2880. [2018-10-27 14:59:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-10-27 14:59:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3720 transitions. [2018-10-27 14:59:06,716 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3720 transitions. Word has length 176 [2018-10-27 14:59:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:59:06,717 INFO L481 AbstractCegarLoop]: Abstraction has 2880 states and 3720 transitions. [2018-10-27 14:59:06,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:59:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3720 transitions. [2018-10-27 14:59:06,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-27 14:59:06,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:59:06,721 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:59:06,721 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:59:06,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:59:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash -639298360, now seen corresponding path program 1 times [2018-10-27 14:59:06,722 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:59:06,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:06,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:59:06,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:06,723 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:59:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:59:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-27 14:59:07,076 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:59:07,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:59:07,076 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:59:07,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:59:07,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:59:07,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:59:07,077 INFO L87 Difference]: Start difference. First operand 2880 states and 3720 transitions. Second operand 4 states. [2018-10-27 14:59:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:59:17,944 INFO L93 Difference]: Finished difference Result 11049 states and 14698 transitions. [2018-10-27 14:59:17,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:59:17,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 230 [2018-10-27 14:59:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:59:17,981 INFO L225 Difference]: With dead ends: 11049 [2018-10-27 14:59:17,981 INFO L226 Difference]: Without dead ends: 8175 [2018-10-27 14:59:17,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:59:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2018-10-27 14:59:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8171. [2018-10-27 14:59:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8171 states. [2018-10-27 14:59:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 9880 transitions. [2018-10-27 14:59:18,183 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 9880 transitions. Word has length 230 [2018-10-27 14:59:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:59:18,184 INFO L481 AbstractCegarLoop]: Abstraction has 8171 states and 9880 transitions. [2018-10-27 14:59:18,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:59:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 9880 transitions. [2018-10-27 14:59:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-27 14:59:18,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:59:18,192 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 14:59:18,192 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:59:18,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:59:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1380574037, now seen corresponding path program 1 times [2018-10-27 14:59:18,193 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:59:18,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:18,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:59:18,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:18,194 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:59:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:59:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 118 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:59:18,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:59:18,755 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:59:18,755 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 254 with the following transitions: [2018-10-27 14:59:18,757 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1138], [1140], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:59:18,822 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:59:18,822 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:59:19,360 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:59:19,945 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 14:59:19,947 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-27 14:59:19,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:59:19,994 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 14:59:21,074 INFO L227 lantSequenceWeakener]: Weakened 244 states. On average, predicates are now at 75.79% of their original sizes. [2018-10-27 14:59:21,074 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 14:59:21,329 INFO L415 sIntCurrentIteration]: We unified 252 AI predicates to 252 [2018-10-27 14:59:21,329 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 14:59:21,330 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:59:21,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-10-27 14:59:21,331 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:59:21,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 14:59:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 14:59:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-27 14:59:21,332 INFO L87 Difference]: Start difference. First operand 8171 states and 9880 transitions. Second operand 7 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown