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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 23:51:46,353 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:51:46,357 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:51:46,374 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:51:46,375 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:51:46,376 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:51:46,377 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:51:46,379 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:51:46,382 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:51:46,383 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:51:46,393 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:51:46,394 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:51:46,395 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:51:46,395 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:51:46,397 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:51:46,399 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:51:46,400 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:51:46,405 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:51:46,409 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:51:46,411 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:51:46,415 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:51:46,417 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:51:46,423 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:51:46,423 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:51:46,424 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:51:46,424 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:51:46,426 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:51:46,427 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:51:46,427 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:51:46,431 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:51:46,431 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:51:46,431 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 23:51:46,432 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 23:51:46,432 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 23:51:46,433 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 23:51:46,435 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 23:51:46,436 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-26 23:51:46,463 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:51:46,463 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:51:46,464 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:51:46,464 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 23:51:46,464 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 23:51:46,467 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 23:51:46,468 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 23:51:46,468 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 23:51:46,468 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-26 23:51:46,468 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 23:51:46,468 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 23:51:46,469 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 23:51:46,469 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:51:46,470 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 23:51:46,471 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:51:46,471 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:51:46,471 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:51:46,471 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:51:46,472 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:51:46,472 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:51:46,472 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:51:46,472 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:51:46,472 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:51:46,473 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:51:46,474 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:51:46,474 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:51:46,474 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:51:46,474 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:51:46,475 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 23:51:46,475 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:51:46,475 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 23:51:46,475 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 23:51:46,475 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 23:51:46,476 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-26 23:51:46,535 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:51:46,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:51:46,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:51:46,557 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:51:46,557 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:51:46,558 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08_false-unreach-call_false-termination.c [2018-10-26 23:51:46,628 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e1442b38/8179df49bf77428b8b8b674abae2d9ab/FLAG1d7457c98 [2018-10-26 23:51:47,216 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:51:47,217 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label08_false-unreach-call_false-termination.c [2018-10-26 23:51:47,231 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e1442b38/8179df49bf77428b8b8b674abae2d9ab/FLAG1d7457c98 [2018-10-26 23:51:47,248 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5e1442b38/8179df49bf77428b8b8b674abae2d9ab [2018-10-26 23:51:47,260 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:51:47,262 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 23:51:47,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:51:47,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:51:47,267 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:51:47,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:51:47" (1/1) ... [2018-10-26 23:51:47,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128929bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:47, skipping insertion in model container [2018-10-26 23:51:47,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:51:47" (1/1) ... [2018-10-26 23:51:47,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:51:47,354 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:51:47,827 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:51:47,837 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:51:48,063 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:51:48,085 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:51:48,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48 WrapperNode [2018-10-26 23:51:48,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:51:48,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 23:51:48,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 23:51:48,087 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 23:51:48,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (1/1) ... [2018-10-26 23:51:48,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (1/1) ... [2018-10-26 23:51:48,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 23:51:48,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:51:48,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:51:48,378 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:51:48,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (1/1) ... [2018-10-26 23:51:48,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (1/1) ... [2018-10-26 23:51:48,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (1/1) ... [2018-10-26 23:51:48,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (1/1) ... [2018-10-26 23:51:48,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (1/1) ... [2018-10-26 23:51:48,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (1/1) ... [2018-10-26 23:51:48,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (1/1) ... [2018-10-26 23:51:48,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:51:48,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:51:48,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:51:48,510 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:51:48,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (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 [2018-10-26 23:51:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:51:48,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:51:48,596 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-26 23:51:48,596 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-26 23:51:48,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:51:48,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:51:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:51:48,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:51:52,608 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:51:52,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:51:52 BoogieIcfgContainer [2018-10-26 23:51:52,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:51:52,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:51:52,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:51:52,614 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:51:52,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:51:47" (1/3) ... [2018-10-26 23:51:52,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5de1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:51:52, skipping insertion in model container [2018-10-26 23:51:52,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:51:48" (2/3) ... [2018-10-26 23:51:52,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5de1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:51:52, skipping insertion in model container [2018-10-26 23:51:52,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:51:52" (3/3) ... [2018-10-26 23:51:52,618 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label08_false-unreach-call_false-termination.c [2018-10-26 23:51:52,629 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:51:52,640 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:51:52,660 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:51:52,703 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:51:52,703 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:51:52,704 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:51:52,704 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:51:52,704 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:51:52,704 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:51:52,704 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:51:52,705 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:51:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-10-26 23:51:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-26 23:51:52,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:51:52,741 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:51:52,744 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:51:52,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:51:52,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1967865695, now seen corresponding path program 1 times [2018-10-26 23:51:52,752 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:51:52,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:51:52,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:51:52,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:51:52,807 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:51:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:51:53,158 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-26 23:51:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:51:53,175 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:51:53,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 23:51:53,176 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:51:53,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 23:51:53,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 23:51:53,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:51:53,199 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-10-26 23:51:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:51:55,308 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-10-26 23:51:55,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 23:51:55,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-10-26 23:51:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:51:55,335 INFO L225 Difference]: With dead ends: 691 [2018-10-26 23:51:55,335 INFO L226 Difference]: Without dead ends: 434 [2018-10-26 23:51:55,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:51:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-10-26 23:51:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-10-26 23:51:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-10-26 23:51:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-10-26 23:51:55,437 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 19 [2018-10-26 23:51:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:51:55,438 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-10-26 23:51:55,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 23:51:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-10-26 23:51:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-26 23:51:55,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:51:55,443 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:51:55,444 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:51:55,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:51:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash 996215900, now seen corresponding path program 1 times [2018-10-26 23:51:55,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:51:55,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:51:55,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:51:55,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:51:55,446 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:51:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:51:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:51:55,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:51:55,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-26 23:51:55,785 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:51:55,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:51:55,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:51:55,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:51:55,789 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-10-26 23:51:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:51:59,395 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-10-26 23:51:59,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:51:59,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2018-10-26 23:51:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:51:59,408 INFO L225 Difference]: With dead ends: 1588 [2018-10-26 23:51:59,409 INFO L226 Difference]: Without dead ends: 1160 [2018-10-26 23:51:59,414 INFO L605 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 [2018-10-26 23:51:59,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-10-26 23:51:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-10-26 23:51:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-10-26 23:51:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-10-26 23:51:59,500 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 89 [2018-10-26 23:51:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:51:59,501 INFO L481 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-10-26 23:51:59,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:51:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-10-26 23:51:59,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-26 23:51:59,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:51:59,507 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:51:59,509 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:51:59,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:51:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash 443394711, now seen corresponding path program 1 times [2018-10-26 23:51:59,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:51:59,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:51:59,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:51:59,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:51:59,514 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:51:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:51:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:51:59,792 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:51:59,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 23:51:59,792 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:51:59,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 23:51:59,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 23:51:59,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 23:51:59,794 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-10-26 23:52:02,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:52:02,795 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-10-26 23:52:02,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:52:02,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2018-10-26 23:52:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:52:02,822 INFO L225 Difference]: With dead ends: 2716 [2018-10-26 23:52:02,822 INFO L226 Difference]: Without dead ends: 1569 [2018-10-26 23:52:02,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:52:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-10-26 23:52:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-10-26 23:52:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-10-26 23:52:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-10-26 23:52:02,902 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 90 [2018-10-26 23:52:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:52:02,903 INFO L481 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-10-26 23:52:02,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 23:52:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-10-26 23:52:02,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-26 23:52:02,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:52:02,908 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:52:02,908 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:52:02,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:52:02,909 INFO L82 PathProgramCache]: Analyzing trace with hash 48842683, now seen corresponding path program 1 times [2018-10-26 23:52:02,909 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:52:02,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:52:02,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:52:02,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:52:02,911 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:52:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:52:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:52:03,125 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:52:03,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 23:52:03,125 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:52:03,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 23:52:03,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 23:52:03,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 23:52:03,126 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-10-26 23:52:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:52:05,551 INFO L93 Difference]: Finished difference Result 4906 states and 7504 transitions. [2018-10-26 23:52:05,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 23:52:05,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2018-10-26 23:52:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:52:05,579 INFO L225 Difference]: With dead ends: 4906 [2018-10-26 23:52:05,580 INFO L226 Difference]: Without dead ends: 3374 [2018-10-26 23:52:05,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:52:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2018-10-26 23:52:05,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3263. [2018-10-26 23:52:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3263 states. [2018-10-26 23:52:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 4437 transitions. [2018-10-26 23:52:05,690 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 4437 transitions. Word has length 92 [2018-10-26 23:52:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:52:05,691 INFO L481 AbstractCegarLoop]: Abstraction has 3263 states and 4437 transitions. [2018-10-26 23:52:05,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 23:52:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 4437 transitions. [2018-10-26 23:52:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-26 23:52:05,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:52:05,703 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:52:05,704 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:52:05,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:52:05,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1675787813, now seen corresponding path program 1 times [2018-10-26 23:52:05,705 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:52:05,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:52:05,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:52:05,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:52:05,706 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:52:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:52:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-10-26 23:52:05,904 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:52:05,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 23:52:05,904 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:52:05,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 23:52:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 23:52:05,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 23:52:05,906 INFO L87 Difference]: Start difference. First operand 3263 states and 4437 transitions. Second operand 4 states. [2018-10-26 23:52:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:52:08,264 INFO L93 Difference]: Finished difference Result 8796 states and 12469 transitions. [2018-10-26 23:52:08,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 23:52:08,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2018-10-26 23:52:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:52:08,299 INFO L225 Difference]: With dead ends: 8796 [2018-10-26 23:52:08,299 INFO L226 Difference]: Without dead ends: 5539 [2018-10-26 23:52:08,374 INFO L605 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 [2018-10-26 23:52:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2018-10-26 23:52:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 5539. [2018-10-26 23:52:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5539 states. [2018-10-26 23:52:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 7494 transitions. [2018-10-26 23:52:08,508 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 7494 transitions. Word has length 177 [2018-10-26 23:52:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:52:08,509 INFO L481 AbstractCegarLoop]: Abstraction has 5539 states and 7494 transitions. [2018-10-26 23:52:08,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 23:52:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 7494 transitions. [2018-10-26 23:52:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-26 23:52:08,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:52:08,523 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-26 23:52:08,523 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:52:08,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:52:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2080310447, now seen corresponding path program 1 times [2018-10-26 23:52:08,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:52:08,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:52:08,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:52:08,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:52:08,525 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:52:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:52:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-10-26 23:52:08,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:52:08,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 23:52:08,774 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:52:08,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 23:52:08,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 23:52:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:52:08,775 INFO L87 Difference]: Start difference. First operand 5539 states and 7494 transitions. Second operand 3 states. [2018-10-26 23:52:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:52:10,969 INFO L93 Difference]: Finished difference Result 12598 states and 17780 transitions. [2018-10-26 23:52:10,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 23:52:10,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2018-10-26 23:52:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:52:11,010 INFO L225 Difference]: With dead ends: 12598 [2018-10-26 23:52:11,011 INFO L226 Difference]: Without dead ends: 7065 [2018-10-26 23:52:11,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:52:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2018-10-26 23:52:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 7060. [2018-10-26 23:52:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7060 states. [2018-10-26 23:52:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 9592 transitions. [2018-10-26 23:52:11,250 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 9592 transitions. Word has length 237 [2018-10-26 23:52:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:52:11,251 INFO L481 AbstractCegarLoop]: Abstraction has 7060 states and 9592 transitions. [2018-10-26 23:52:11,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 23:52:11,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 9592 transitions. [2018-10-26 23:52:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-26 23:52:11,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:52:11,272 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:52:11,272 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:52:11,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:52:11,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1716679298, now seen corresponding path program 1 times [2018-10-26 23:52:11,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:52:11,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:52:11,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:52:11,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:52:11,274 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:52:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:52:11,906 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-10-26 23:52:12,272 WARN L179 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2018-10-26 23:52:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:52:12,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:52:12,946 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:52:12,947 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 263 with the following transitions: [2018-10-26 23:52:12,950 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [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], [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], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-26 23:52:13,038 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:52:13,039 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:52:16,007 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 23:52:19,589 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 23:52:19,591 INFO L272 AbstractInterpreter]: Visited 135 different actions 135 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-26 23:52:19,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:52:19,635 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 23:52:22,596 INFO L227 lantSequenceWeakener]: Weakened 254 states. On average, predicates are now at 77.37% of their original sizes. [2018-10-26 23:52:22,597 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 23:52:23,036 INFO L415 sIntCurrentIteration]: We unified 261 AI predicates to 261 [2018-10-26 23:52:23,036 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 23:52:23,037 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 23:52:23,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2018-10-26 23:52:23,037 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:52:23,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 23:52:23,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 23:52:23,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:52:23,039 INFO L87 Difference]: Start difference. First operand 7060 states and 9592 transitions. Second operand 7 states. [2018-10-26 23:52:36,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:52:36,241 INFO L93 Difference]: Finished difference Result 14299 states and 19408 transitions. [2018-10-26 23:52:36,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:52:36,241 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 262 [2018-10-26 23:52:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:52:36,275 INFO L225 Difference]: With dead ends: 14299 [2018-10-26 23:52:36,275 INFO L226 Difference]: Without dead ends: 7245 [2018-10-26 23:52:36,300 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 262 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:52:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7245 states. [2018-10-26 23:52:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7245 to 7243. [2018-10-26 23:52:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7243 states. [2018-10-26 23:52:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7243 states to 7243 states and 9783 transitions. [2018-10-26 23:52:36,551 INFO L78 Accepts]: Start accepts. Automaton has 7243 states and 9783 transitions. Word has length 262 [2018-10-26 23:52:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:52:36,552 INFO L481 AbstractCegarLoop]: Abstraction has 7243 states and 9783 transitions. [2018-10-26 23:52:36,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 23:52:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 7243 states and 9783 transitions. [2018-10-26 23:52:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-10-26 23:52:36,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:52:36,578 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:52:36,579 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:52:36,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:52:36,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1519194548, now seen corresponding path program 1 times [2018-10-26 23:52:36,580 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:52:36,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:52:36,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:52:36,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:52:36,581 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:52:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:52:37,145 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 23:52:37,361 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 23:52:37,708 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-10-26 23:52:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 124 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 23:52:38,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:52:38,146 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:52:38,147 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 348 with the following transitions: [2018-10-26 23:52:38,147 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [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], [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], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-26 23:52:38,155 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:52:38,155 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:52:41,359 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-26 23:52:48,523 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-26 23:52:48,523 INFO L272 AbstractInterpreter]: Visited 139 different actions 272 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-26 23:52:48,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:52:48,532 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-26 23:52:50,979 INFO L227 lantSequenceWeakener]: Weakened 133 states. On average, predicates are now at 77.75% of their original sizes. [2018-10-26 23:52:50,980 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-26 23:53:27,731 INFO L415 sIntCurrentIteration]: We unified 346 AI predicates to 346 [2018-10-26 23:53:27,732 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-26 23:53:27,732 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 23:53:27,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [12] total 32 [2018-10-26 23:53:27,733 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:53:27,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 23:53:27,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 23:53:27,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2018-10-26 23:53:27,734 INFO L87 Difference]: Start difference. First operand 7243 states and 9783 transitions. Second operand 22 states. [2018-10-26 23:55:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:55:37,614 INFO L93 Difference]: Finished difference Result 15292 states and 20479 transitions. [2018-10-26 23:55:37,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-26 23:55:37,614 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 347 [2018-10-26 23:55:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:55:37,636 INFO L225 Difference]: With dead ends: 15292 [2018-10-26 23:55:37,637 INFO L226 Difference]: Without dead ends: 7248 [2018-10-26 23:55:37,652 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 355 GetRequests, 266 SyntacticMatches, 60 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2018-10-26 23:55:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7248 states. [2018-10-26 23:55:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7248 to 7243. [2018-10-26 23:55:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7243 states. [2018-10-26 23:55:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7243 states to 7243 states and 9777 transitions. [2018-10-26 23:55:37,858 INFO L78 Accepts]: Start accepts. Automaton has 7243 states and 9777 transitions. Word has length 347 [2018-10-26 23:55:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:55:37,859 INFO L481 AbstractCegarLoop]: Abstraction has 7243 states and 9777 transitions. [2018-10-26 23:55:37,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 23:55:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 7243 states and 9777 transitions. [2018-10-26 23:55:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-10-26 23:55:37,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:55:37,881 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:55:37,881 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:55:37,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:55:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash -719461640, now seen corresponding path program 1 times [2018-10-26 23:55:37,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:55:37,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:55:37,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:55:37,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:55:37,883 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:55:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:55:38,393 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 23:55:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 49 proven. 317 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 23:55:39,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:55:39,174 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:55:39,174 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 374 with the following transitions: [2018-10-26 23:55:39,175 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [53], [55], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [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], [639], [643], [647], [651], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [734], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-10-26 23:55:39,180 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:55:39,181 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:55:40,775 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-10-26 23:55:45,954 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-26 23:55:45,955 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-26 23:55:45,956 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:55:45,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:55:45,956 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:55:45,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:55:45,971 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 23:55:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:55:46,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:55:46,165 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-26 23:55:46,366 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:55:46,367 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-26 23:55:46,372 WARN L205 ceAbstractionStarter]: Timeout [2018-10-26 23:55:46,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 11:55:46 BoogieIcfgContainer [2018-10-26 23:55:46,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 23:55:46,374 INFO L168 Benchmark]: Toolchain (without parser) took 239113.52 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.7 GB in the end (delta: -2.3 GB). Peak memory consumption was 312.2 MB. Max. memory is 7.1 GB. [2018-10-26 23:55:46,375 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-26 23:55:46,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 823.85 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. [2018-10-26 23:55:46,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 290.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -841.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2018-10-26 23:55:46,379 INFO L168 Benchmark]: Boogie Preprocessor took 131.71 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2018-10-26 23:55:46,379 INFO L168 Benchmark]: RCFGBuilder took 4099.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 136.2 MB). Peak memory consumption was 136.2 MB. Max. memory is 7.1 GB. [2018-10-26 23:55:46,385 INFO L168 Benchmark]: TraceAbstraction took 233762.81 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 204.7 MB. Max. memory is 7.1 GB. [2018-10-26 23:55:46,392 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 823.85 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 290.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -841.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.71 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4099.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 136.2 MB). Peak memory consumption was 136.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233762.81 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 204.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 40]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 40). Cancelled while BasicCegarLoop was analyzing trace of length 374 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 233.6s OverallTime, 9 OverallIterations, 4 TraceHistogramMax, 159.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1373 SDtfs, 6281 SDslu, 906 SDs, 0 SdLazy, 9034 SolverSat, 1720 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.8s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 660 GetRequests, 537 SyntacticMatches, 65 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 39.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7243occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 23.8s AbstIntTime, 3 AbstIntIterations, 2 AbstIntStrong, 0.995973903493064 AbsIntWeakeningRatio, 0.09555189456342669 AbsIntAvgWeakeningVarsNumRemoved, 809.1911037891268 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 161 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 1313 NumberOfCodeBlocks, 1313 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 1305 ConstructedInterpolants, 0 QuantifiedInterpolants, 3335457 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 527/719 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown