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/Problem16_label16_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:19:18,272 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:19:18,279 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:19:18,294 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:19:18,294 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:19:18,295 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:19:18,296 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:19:18,298 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:19:18,300 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:19:18,301 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:19:18,302 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:19:18,302 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:19:18,303 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:19:18,304 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:19:18,305 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:19:18,305 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:19:18,306 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:19:18,308 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:19:18,310 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:19:18,312 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:19:18,313 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:19:18,314 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:19:18,316 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:19:18,317 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:19:18,317 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:19:18,318 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:19:18,319 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:19:18,320 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:19:18,321 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:19:18,322 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:19:18,322 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:19:18,323 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:19:18,323 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:19:18,323 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:19:18,324 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:19:18,325 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:19:18,325 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 15:19:18,352 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:19:18,352 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:19:18,353 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:19:18,353 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:19:18,353 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:19:18,353 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:19:18,353 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:19:18,355 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:19:18,355 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:19:18,355 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:19:18,355 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:19:18,355 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:19:18,359 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:19:18,359 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:19:18,360 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:19:18,360 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:19:18,360 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:19:18,360 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:19:18,360 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:19:18,361 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:19:18,362 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:19:18,362 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:19:18,362 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:19:18,362 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:19:18,362 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:19:18,363 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:19:18,363 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:19:18,363 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:19:18,363 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:19:18,364 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:19:18,364 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:19:18,364 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:19:18,365 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:19:18,365 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:19:18,408 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:19:18,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:19:18,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:19:18,427 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:19:18,427 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:19:18,428 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label16_true-unreach-call.c [2018-11-07 15:19:18,493 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a0268572/105549d8bdb8492982b5f0d16ba2ab1f/FLAG97564cf0a [2018-11-07 15:19:19,166 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:19:19,167 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label16_true-unreach-call.c [2018-11-07 15:19:19,189 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a0268572/105549d8bdb8492982b5f0d16ba2ab1f/FLAG97564cf0a [2018-11-07 15:19:19,205 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a0268572/105549d8bdb8492982b5f0d16ba2ab1f [2018-11-07 15:19:19,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:19:19,217 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:19:19,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:19:19,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:19:19,224 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:19:19,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:19:19" (1/1) ... [2018-11-07 15:19:19,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e88097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:19, skipping insertion in model container [2018-11-07 15:19:19,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:19:19" (1/1) ... [2018-11-07 15:19:19,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:19:19,321 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:19:20,026 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:19:20,031 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:19:20,292 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:19:20,312 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:19:20,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20 WrapperNode [2018-11-07 15:19:20,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:19:20,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:19:20,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:19:20,314 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:19:20,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (1/1) ... [2018-11-07 15:19:20,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (1/1) ... [2018-11-07 15:19:20,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:19:20,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:19:20,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:19:20,502 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:19:20,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (1/1) ... [2018-11-07 15:19:20,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (1/1) ... [2018-11-07 15:19:20,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (1/1) ... [2018-11-07 15:19:20,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (1/1) ... [2018-11-07 15:19:20,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (1/1) ... [2018-11-07 15:19:20,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (1/1) ... [2018-11-07 15:19:20,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (1/1) ... [2018-11-07 15:19:20,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:19:20,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:19:20,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:19:20,659 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:19:20,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (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 15:19:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:19:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:19:20,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:19:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:19:20,735 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:19:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:19:20,736 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:19:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:19:20,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:19:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:19:20,737 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:19:27,849 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:19:27,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:19:27 BoogieIcfgContainer [2018-11-07 15:19:27,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:19:27,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:19:27,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:19:27,854 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:19:27,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:19:19" (1/3) ... [2018-11-07 15:19:27,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e77618d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:19:27, skipping insertion in model container [2018-11-07 15:19:27,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:19:20" (2/3) ... [2018-11-07 15:19:27,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e77618d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:19:27, skipping insertion in model container [2018-11-07 15:19:27,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:19:27" (3/3) ... [2018-11-07 15:19:27,858 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label16_true-unreach-call.c [2018-11-07 15:19:27,866 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:19:27,874 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:19:27,887 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:19:27,926 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:19:27,926 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:19:27,927 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:19:27,927 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:19:27,927 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:19:27,927 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:19:27,927 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:19:27,928 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:19:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 15:19:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-07 15:19:27,968 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:19:27,969 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:19:27,972 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:19:27,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:19:27,977 INFO L82 PathProgramCache]: Analyzing trace with hash 657368747, now seen corresponding path program 1 times [2018-11-07 15:19:27,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:19:28,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:28,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:19:28,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:28,028 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:19:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:19:28,443 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:19:28,494 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 15:19:28,496 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:19:28,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 15:19:28,497 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:19:28,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 15:19:28,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 15:19:28,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 15:19:28,523 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-11-07 15:19:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:19:31,868 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-11-07 15:19:31,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 15:19:31,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2018-11-07 15:19:31,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:19:31,894 INFO L225 Difference]: With dead ends: 1156 [2018-11-07 15:19:31,894 INFO L226 Difference]: Without dead ends: 744 [2018-11-07 15:19:31,905 INFO L604 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 [2018-11-07 15:19:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-11-07 15:19:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-11-07 15:19:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-11-07 15:19:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1317 transitions. [2018-11-07 15:19:32,007 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1317 transitions. Word has length 49 [2018-11-07 15:19:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:19:32,008 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1317 transitions. [2018-11-07 15:19:32,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 15:19:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1317 transitions. [2018-11-07 15:19:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-07 15:19:32,016 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:19:32,017 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:19:32,017 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:19:32,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:19:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash 591590536, now seen corresponding path program 1 times [2018-11-07 15:19:32,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:19:32,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:32,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:19:32,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:32,019 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:19:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:19:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:19:32,340 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:19:32,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:19:32,340 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:19:32,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:19:32,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:19:32,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:19:32,343 INFO L87 Difference]: Start difference. First operand 744 states and 1317 transitions. Second operand 6 states. [2018-11-07 15:19:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:19:41,420 INFO L93 Difference]: Finished difference Result 2960 states and 5501 transitions. [2018-11-07 15:19:41,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 15:19:41,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-11-07 15:19:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:19:41,446 INFO L225 Difference]: With dead ends: 2960 [2018-11-07 15:19:41,446 INFO L226 Difference]: Without dead ends: 2222 [2018-11-07 15:19:41,461 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 15:19:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2018-11-07 15:19:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2174. [2018-11-07 15:19:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2174 states. [2018-11-07 15:19:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 3683 transitions. [2018-11-07 15:19:41,585 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 3683 transitions. Word has length 125 [2018-11-07 15:19:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:19:41,586 INFO L480 AbstractCegarLoop]: Abstraction has 2174 states and 3683 transitions. [2018-11-07 15:19:41,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:19:41,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 3683 transitions. [2018-11-07 15:19:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-07 15:19:41,591 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:19:41,591 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:19:41,592 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:19:41,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:19:41,592 INFO L82 PathProgramCache]: Analyzing trace with hash 975106256, now seen corresponding path program 1 times [2018-11-07 15:19:41,592 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:19:41,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:41,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:19:41,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:41,594 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:19:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:19:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:19:41,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:19:41,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:19:41,795 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:19:41,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:19:41,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:19:41,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:19:41,796 INFO L87 Difference]: Start difference. First operand 2174 states and 3683 transitions. Second operand 6 states. [2018-11-07 15:19:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:19:46,838 INFO L93 Difference]: Finished difference Result 8056 states and 14415 transitions. [2018-11-07 15:19:46,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:19:46,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2018-11-07 15:19:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:19:46,880 INFO L225 Difference]: With dead ends: 8056 [2018-11-07 15:19:46,880 INFO L226 Difference]: Without dead ends: 5888 [2018-11-07 15:19:46,916 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:19:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5888 states. [2018-11-07 15:19:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5888 to 5825. [2018-11-07 15:19:47,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5825 states. [2018-11-07 15:19:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5825 states to 5825 states and 8990 transitions. [2018-11-07 15:19:47,101 INFO L78 Accepts]: Start accepts. Automaton has 5825 states and 8990 transitions. Word has length 129 [2018-11-07 15:19:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:19:47,101 INFO L480 AbstractCegarLoop]: Abstraction has 5825 states and 8990 transitions. [2018-11-07 15:19:47,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:19:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 5825 states and 8990 transitions. [2018-11-07 15:19:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-11-07 15:19:47,106 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:19:47,106 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:19:47,106 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:19:47,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:19:47,107 INFO L82 PathProgramCache]: Analyzing trace with hash -834708748, now seen corresponding path program 1 times [2018-11-07 15:19:47,107 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:19:47,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:47,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:19:47,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:47,108 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:19:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:19:47,390 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:19:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:19:47,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:19:47,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:19:47,500 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:19:47,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:19:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:19:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:19:47,501 INFO L87 Difference]: Start difference. First operand 5825 states and 8990 transitions. Second operand 6 states. [2018-11-07 15:19:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:19:51,540 INFO L93 Difference]: Finished difference Result 13811 states and 22555 transitions. [2018-11-07 15:19:51,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:19:51,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2018-11-07 15:19:51,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:19:51,588 INFO L225 Difference]: With dead ends: 13811 [2018-11-07 15:19:51,588 INFO L226 Difference]: Without dead ends: 7992 [2018-11-07 15:19:51,640 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 15:19:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7992 states. [2018-11-07 15:19:51,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7992 to 7914. [2018-11-07 15:19:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7914 states. [2018-11-07 15:19:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7914 states to 7914 states and 11631 transitions. [2018-11-07 15:19:51,850 INFO L78 Accepts]: Start accepts. Automaton has 7914 states and 11631 transitions. Word has length 131 [2018-11-07 15:19:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:19:51,850 INFO L480 AbstractCegarLoop]: Abstraction has 7914 states and 11631 transitions. [2018-11-07 15:19:51,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:19:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 7914 states and 11631 transitions. [2018-11-07 15:19:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-11-07 15:19:51,854 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:19:51,854 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:19:51,854 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:19:51,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:19:51,855 INFO L82 PathProgramCache]: Analyzing trace with hash 845250593, now seen corresponding path program 1 times [2018-11-07 15:19:51,855 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:19:51,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:51,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:19:51,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:51,856 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:19:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:19:52,045 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:19:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:19:52,102 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:19:52,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:19:52,103 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:19:52,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:19:52,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:19:52,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:19:52,104 INFO L87 Difference]: Start difference. First operand 7914 states and 11631 transitions. Second operand 6 states. [2018-11-07 15:19:56,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:19:56,034 INFO L93 Difference]: Finished difference Result 19303 states and 30706 transitions. [2018-11-07 15:19:56,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:19:56,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2018-11-07 15:19:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:19:56,121 INFO L225 Difference]: With dead ends: 19303 [2018-11-07 15:19:56,122 INFO L226 Difference]: Without dead ends: 11395 [2018-11-07 15:19:56,155 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:19:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11395 states. [2018-11-07 15:19:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11395 to 11330. [2018-11-07 15:19:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11330 states. [2018-11-07 15:19:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11330 states to 11330 states and 16228 transitions. [2018-11-07 15:19:56,476 INFO L78 Accepts]: Start accepts. Automaton has 11330 states and 16228 transitions. Word has length 134 [2018-11-07 15:19:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:19:56,476 INFO L480 AbstractCegarLoop]: Abstraction has 11330 states and 16228 transitions. [2018-11-07 15:19:56,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:19:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 11330 states and 16228 transitions. [2018-11-07 15:19:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-07 15:19:56,480 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:19:56,480 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:19:56,481 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:19:56,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:19:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1926747012, now seen corresponding path program 1 times [2018-11-07 15:19:56,481 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:19:56,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:56,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:19:56,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:19:56,482 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:19:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:19:56,737 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:19:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:19:57,100 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:19:57,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:19:57,100 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:19:57,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:19:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:19:57,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:19:57,102 INFO L87 Difference]: Start difference. First operand 11330 states and 16228 transitions. Second operand 6 states. [2018-11-07 15:20:00,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:20:00,077 INFO L93 Difference]: Finished difference Result 24439 states and 35718 transitions. [2018-11-07 15:20:00,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:20:00,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2018-11-07 15:20:00,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:20:00,131 INFO L225 Difference]: With dead ends: 24439 [2018-11-07 15:20:00,131 INFO L226 Difference]: Without dead ends: 13115 [2018-11-07 15:20:00,164 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:20:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13115 states. [2018-11-07 15:20:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13115 to 13089. [2018-11-07 15:20:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13089 states. [2018-11-07 15:20:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13089 states to 13089 states and 17349 transitions. [2018-11-07 15:20:00,471 INFO L78 Accepts]: Start accepts. Automaton has 13089 states and 17349 transitions. Word has length 139 [2018-11-07 15:20:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:20:00,471 INFO L480 AbstractCegarLoop]: Abstraction has 13089 states and 17349 transitions. [2018-11-07 15:20:00,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:20:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 13089 states and 17349 transitions. [2018-11-07 15:20:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-11-07 15:20:00,473 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:20:00,474 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:20:00,474 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:20:00,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:20:00,475 INFO L82 PathProgramCache]: Analyzing trace with hash 520725928, now seen corresponding path program 1 times [2018-11-07 15:20:00,475 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:20:00,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:20:00,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:20:00,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:20:00,476 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:20:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:20:00,703 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:20:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-07 15:20:00,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:20:00,941 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:20:00,942 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 142 with the following transitions: [2018-11-07 15:20:00,949 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [471], [473], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 15:20:01,006 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:20:01,007 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:20:01,701 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:20:02,276 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:20:02,278 INFO L272 AbstractInterpreter]: Visited 99 different actions 284 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 15:20:02,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:20:02,325 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:20:02,807 INFO L227 lantSequenceWeakener]: Weakened 21 states. On average, predicates are now at 81.82% of their original sizes. [2018-11-07 15:20:02,807 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:20:03,468 INFO L415 sIntCurrentIteration]: We unified 140 AI predicates to 140 [2018-11-07 15:20:03,468 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:20:03,469 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:20:03,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [4] total 18 [2018-11-07 15:20:03,470 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:20:03,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 15:20:03,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 15:20:03,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-11-07 15:20:03,471 INFO L87 Difference]: Start difference. First operand 13089 states and 17349 transitions. Second operand 16 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown