java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label21_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:00:59,362 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:00:59,365 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:00:59,380 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:00:59,380 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:00:59,384 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:00:59,386 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:00:59,389 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:00:59,392 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:00:59,393 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:00:59,395 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:00:59,395 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:00:59,396 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:00:59,399 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:00:59,406 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:00:59,407 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:00:59,408 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:00:59,410 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:00:59,412 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:00:59,413 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:00:59,414 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:00:59,415 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:00:59,419 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:00:59,419 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:00:59,419 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:00:59,421 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:00:59,421 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:00:59,422 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:00:59,423 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:00:59,424 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:00:59,424 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:00:59,425 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:00:59,425 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:00:59,425 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:00:59,428 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:00:59,428 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:00:59,429 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 15:00:59,457 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:00:59,457 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:00:59,458 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:00:59,458 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:00:59,459 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:00:59,459 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:00:59,459 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:00:59,459 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:00:59,459 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:00:59,460 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:00:59,460 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:00:59,460 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:00:59,463 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:00:59,463 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:00:59,463 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:00:59,464 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:00:59,464 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:00:59,464 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:00:59,464 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:00:59,464 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:00:59,465 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:00:59,465 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:00:59,465 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:00:59,465 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:00:59,465 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:00:59,467 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:00:59,467 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:00:59,467 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:00:59,468 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:00:59,468 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:00:59,468 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:00:59,468 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:00:59,468 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:00:59,469 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:00:59,538 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:00:59,553 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:00:59,557 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:00:59,559 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:00:59,559 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:00:59,560 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label21_true-unreach-call_false-termination.c [2018-11-07 15:00:59,618 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394420c60/f063b9a862d1432fb218f8666f7e8cb8/FLAG26bf90684 [2018-11-07 15:01:00,267 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:01:00,268 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label21_true-unreach-call_false-termination.c [2018-11-07 15:01:00,281 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394420c60/f063b9a862d1432fb218f8666f7e8cb8/FLAG26bf90684 [2018-11-07 15:01:00,296 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394420c60/f063b9a862d1432fb218f8666f7e8cb8 [2018-11-07 15:01:00,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:01:00,310 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:01:00,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:01:00,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:01:00,316 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:01:00,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:01:00" (1/1) ... [2018-11-07 15:01:00,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d010140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:00, skipping insertion in model container [2018-11-07 15:01:00,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:01:00" (1/1) ... [2018-11-07 15:01:00,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:01:00,403 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:01:00,946 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:01:00,950 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:01:01,094 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:01:01,112 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:01:01,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01 WrapperNode [2018-11-07 15:01:01,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:01:01,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:01:01,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:01:01,114 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:01:01,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (1/1) ... [2018-11-07 15:01:01,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (1/1) ... [2018-11-07 15:01:01,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:01:01,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:01:01,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:01:01,258 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:01:01,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (1/1) ... [2018-11-07 15:01:01,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (1/1) ... [2018-11-07 15:01:01,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (1/1) ... [2018-11-07 15:01:01,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (1/1) ... [2018-11-07 15:01:01,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (1/1) ... [2018-11-07 15:01:01,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (1/1) ... [2018-11-07 15:01:01,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (1/1) ... [2018-11-07 15:01:01,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:01:01,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:01:01,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:01:01,400 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:01:01,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:01:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:01:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:01:01,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:01:01,481 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:01:01,482 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:01:01,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:01:01,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:01:01,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:01:01,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:01:05,421 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:01:05,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:01:05 BoogieIcfgContainer [2018-11-07 15:01:05,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:01:05,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:01:05,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:01:05,428 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:01:05,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:01:00" (1/3) ... [2018-11-07 15:01:05,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c823c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:01:05, skipping insertion in model container [2018-11-07 15:01:05,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:01:01" (2/3) ... [2018-11-07 15:01:05,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c823c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:01:05, skipping insertion in model container [2018-11-07 15:01:05,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:01:05" (3/3) ... [2018-11-07 15:01:05,433 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label21_true-unreach-call_false-termination.c [2018-11-07 15:01:05,444 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:01:05,459 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:01:05,478 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:01:05,519 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:01:05,520 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:01:05,520 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:01:05,520 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:01:05,520 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:01:05,520 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:01:05,521 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:01:05,521 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:01:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 15:01:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-07 15:01:05,561 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:01:05,562 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] [2018-11-07 15:01:05,565 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:01:05,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:01:05,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1101027815, now seen corresponding path program 1 times [2018-11-07 15:01:05,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:01:05,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:01:05,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:01:05,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:01:05,634 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:01:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:01:06,059 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:01:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:01:06,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:01:06,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 15:01:06,172 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:01:06,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 15:01:06,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 15:01:06,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 15:01:06,200 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 15:01:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:01:07,909 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 15:01:07,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 15:01:07,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2018-11-07 15:01:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:01:07,933 INFO L225 Difference]: With dead ends: 691 [2018-11-07 15:01:07,933 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 15:01:07,943 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 15:01:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 15:01:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 15:01:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 15:01:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 767 transitions. [2018-11-07 15:01:08,031 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 767 transitions. Word has length 41 [2018-11-07 15:01:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:01:08,032 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 767 transitions. [2018-11-07 15:01:08,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 15:01:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 767 transitions. [2018-11-07 15:01:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-07 15:01:08,039 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:01:08,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:01:08,040 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:01:08,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:01:08,040 INFO L82 PathProgramCache]: Analyzing trace with hash 212852571, now seen corresponding path program 1 times [2018-11-07 15:01:08,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:01:08,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:01:08,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:01:08,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:01:08,042 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:01:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:01:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:01:08,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:01:08,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:01:08,306 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:01:08,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:01:08,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:01:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:01:08,310 INFO L87 Difference]: Start difference. First operand 434 states and 767 transitions. Second operand 5 states. [2018-11-07 15:01:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:01:11,686 INFO L93 Difference]: Finished difference Result 1416 states and 2580 transitions. [2018-11-07 15:01:11,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 15:01:11,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2018-11-07 15:01:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:01:11,703 INFO L225 Difference]: With dead ends: 1416 [2018-11-07 15:01:11,704 INFO L226 Difference]: Without dead ends: 988 [2018-11-07 15:01:11,708 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:01:11,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2018-11-07 15:01:11,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 973. [2018-11-07 15:01:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2018-11-07 15:01:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1540 transitions. [2018-11-07 15:01:11,832 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1540 transitions. Word has length 118 [2018-11-07 15:01:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:01:11,833 INFO L480 AbstractCegarLoop]: Abstraction has 973 states and 1540 transitions. [2018-11-07 15:01:11,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:01:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1540 transitions. [2018-11-07 15:01:11,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-11-07 15:01:11,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:01:11,846 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:01:11,847 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:01:11,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:01:11,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2137480229, now seen corresponding path program 1 times [2018-11-07 15:01:11,849 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:01:11,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:01:11,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:01:11,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:01:11,851 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:01:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:01:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:01:12,205 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:01:12,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:01:12,206 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:01:12,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:01:12,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:01:12,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:01:12,207 INFO L87 Difference]: Start difference. First operand 973 states and 1540 transitions. Second operand 6 states. [2018-11-07 15:01:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:01:15,739 INFO L93 Difference]: Finished difference Result 2347 states and 3916 transitions. [2018-11-07 15:01:15,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:01:15,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2018-11-07 15:01:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:01:15,760 INFO L225 Difference]: With dead ends: 2347 [2018-11-07 15:01:15,761 INFO L226 Difference]: Without dead ends: 1380 [2018-11-07 15:01:15,767 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:01:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2018-11-07 15:01:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1352. [2018-11-07 15:01:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2018-11-07 15:01:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 2126 transitions. [2018-11-07 15:01:15,836 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 2126 transitions. Word has length 182 [2018-11-07 15:01:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:01:15,836 INFO L480 AbstractCegarLoop]: Abstraction has 1352 states and 2126 transitions. [2018-11-07 15:01:15,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:01:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 2126 transitions. [2018-11-07 15:01:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-07 15:01:15,842 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:01:15,844 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:01:15,844 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:01:15,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:01:15,844 INFO L82 PathProgramCache]: Analyzing trace with hash -448591016, now seen corresponding path program 1 times [2018-11-07 15:01:15,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:01:15,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:01:15,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:01:15,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:01:15,846 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:01:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:01:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:01:16,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:01:16,365 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:01:16,366 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 193 with the following transitions: [2018-11-07 15:01:16,370 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [229], [231], [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], [510], [511], [515], [519], [522], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 15:01:16,424 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:01:16,425 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:01:16,950 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:01:17,460 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:01:17,462 INFO L272 AbstractInterpreter]: Visited 82 different actions 82 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:01:17,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:01:17,511 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:01:18,719 INFO L227 lantSequenceWeakener]: Weakened 183 states. On average, predicates are now at 77.83% of their original sizes. [2018-11-07 15:01:18,719 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:01:19,062 INFO L415 sIntCurrentIteration]: We unified 191 AI predicates to 191 [2018-11-07 15:01:19,063 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:01:19,064 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:01:19,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 15:01:19,064 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:01:19,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 15:01:19,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 15:01:19,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 15:01:19,066 INFO L87 Difference]: Start difference. First operand 1352 states and 2126 transitions. Second operand 7 states. [2018-11-07 15:04:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:04:06,562 INFO L93 Difference]: Finished difference Result 2883 states and 4473 transitions. [2018-11-07 15:04:06,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:04:06,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 192 [2018-11-07 15:04:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:04:06,571 INFO L225 Difference]: With dead ends: 2883 [2018-11-07 15:04:06,572 INFO L226 Difference]: Without dead ends: 1537 [2018-11-07 15:04:06,577 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 192 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:04:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2018-11-07 15:04:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1535. [2018-11-07 15:04:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2018-11-07 15:04:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2316 transitions. [2018-11-07 15:04:06,623 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2316 transitions. Word has length 192 [2018-11-07 15:04:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:04:06,623 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 2316 transitions. [2018-11-07 15:04:06,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 15:04:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2316 transitions. [2018-11-07 15:04:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-11-07 15:04:06,629 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:04:06,629 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:04:06,630 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:04:06,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:04:06,630 INFO L82 PathProgramCache]: Analyzing trace with hash 475311430, now seen corresponding path program 1 times [2018-11-07 15:04:06,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:04:06,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:04:06,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:04:06,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:04:06,632 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:04:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:04:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 254 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 15:04:06,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:04:06,964 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:04:06,964 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 278 with the following transitions: [2018-11-07 15:04:06,965 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [229], [231], [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], [510], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [554], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 15:04:06,970 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:04:06,971 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:04:07,043 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:04:07,625 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:04:07,625 INFO L272 AbstractInterpreter]: Visited 94 different actions 181 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 15:04:07,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:04:07,664 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:04:08,551 INFO L227 lantSequenceWeakener]: Weakened 26 states. On average, predicates are now at 77.8% of their original sizes. [2018-11-07 15:04:08,551 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:04:09,580 INFO L415 sIntCurrentIteration]: We unified 276 AI predicates to 276 [2018-11-07 15:04:09,581 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:04:09,581 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:04:09,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [7] total 23 [2018-11-07 15:04:09,581 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:04:09,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 15:04:09,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 15:04:09,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2018-11-07 15:04:09,583 INFO L87 Difference]: Start difference. First operand 1535 states and 2316 transitions. Second operand 18 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown