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 --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:05:40,362 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:05:40,365 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:05:40,382 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:05:40,382 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:05:40,384 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:05:40,385 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:05:40,387 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:05:40,389 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:05:40,390 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:05:40,392 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:05:40,393 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:05:40,394 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:05:40,398 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:05:40,399 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:05:40,400 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:05:40,400 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:05:40,404 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:05:40,416 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:05:40,417 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:05:40,418 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:05:40,423 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:05:40,425 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:05:40,425 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:05:40,425 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:05:40,426 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:05:40,427 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:05:40,428 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:05:40,428 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:05:40,429 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:05:40,429 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:05:40,430 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-10 12:05:40,432 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 12:05:40,447 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:05:40,447 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:05:40,448 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:05:40,448 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:05:40,448 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:05:40,448 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:05:40,449 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:05:40,449 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:05:40,449 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:05:40,449 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:05:40,449 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:05:40,450 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:05:40,450 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:05:40,450 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:05:40,451 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:05:40,451 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:05:40,451 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:05:40,451 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:05:40,451 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:05:40,452 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:05:40,452 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:05:40,452 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:05:40,452 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:05:40,452 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:05:40,452 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:05:40,453 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:05:40,453 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:05:40,453 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:05:40,453 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:05:40,453 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:05:40,454 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:05:40,454 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:05:40,454 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:05:40,496 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:05:40,509 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:05:40,512 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:05:40,514 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:05:40,514 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:05:40,515 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51_true-unreach-call_false-termination.c [2018-09-10 12:05:40,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3f80ae0/5b8452589c184c83b200bb06b4a52fa5/FLAG77df7c597 [2018-09-10 12:05:41,150 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:05:41,154 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label51_true-unreach-call_false-termination.c [2018-09-10 12:05:41,182 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3f80ae0/5b8452589c184c83b200bb06b4a52fa5/FLAG77df7c597 [2018-09-10 12:05:41,204 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3f80ae0/5b8452589c184c83b200bb06b4a52fa5 [2018-09-10 12:05:41,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:05:41,223 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:05:41,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:05:41,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:05:41,235 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:05:41,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:05:41" (1/1) ... [2018-09-10 12:05:41,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5569bc79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:41, skipping insertion in model container [2018-09-10 12:05:41,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:05:41" (1/1) ... [2018-09-10 12:05:41,502 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:05:41,900 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:05:41,922 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:05:42,066 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:05:42,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42 WrapperNode [2018-09-10 12:05:42,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:05:42,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:05:42,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:05:42,121 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:05:42,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (1/1) ... [2018-09-10 12:05:42,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (1/1) ... [2018-09-10 12:05:42,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:05:42,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:05:42,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:05:42,255 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:05:42,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (1/1) ... [2018-09-10 12:05:42,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (1/1) ... [2018-09-10 12:05:42,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (1/1) ... [2018-09-10 12:05:42,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (1/1) ... [2018-09-10 12:05:42,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (1/1) ... [2018-09-10 12:05:42,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (1/1) ... [2018-09-10 12:05:42,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (1/1) ... [2018-09-10 12:05:42,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:05:42,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:05:42,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:05:42,541 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:05:42,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (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 [2018-09-10 12:05:42,618 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-09-10 12:05:42,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-09-10 12:05:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:05:42,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:05:42,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:05:42,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:05:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:05:42,620 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:05:46,733 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:05:46,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:05:46 BoogieIcfgContainer [2018-09-10 12:05:46,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:05:46,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:05:46,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:05:46,740 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:05:46,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:05:41" (1/3) ... [2018-09-10 12:05:46,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c7f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:05:46, skipping insertion in model container [2018-09-10 12:05:46,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:05:42" (2/3) ... [2018-09-10 12:05:46,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c7f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:05:46, skipping insertion in model container [2018-09-10 12:05:46,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:05:46" (3/3) ... [2018-09-10 12:05:46,744 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label51_true-unreach-call_false-termination.c [2018-09-10 12:05:46,754 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:05:46,763 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:05:46,815 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:05:46,816 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:05:46,816 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:05:46,816 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:05:46,816 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:05:46,817 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:05:46,817 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:05:46,817 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:05:46,817 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:05:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-09-10 12:05:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-10 12:05:46,856 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:46,857 INFO L376 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] [2018-09-10 12:05:46,858 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1331312812, now seen corresponding path program 1 times [2018-09-10 12:05:46,868 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:46,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:46,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:46,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:46,922 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:05:47,320 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:05:47,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:05:47,321 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:05:47,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:05:47,343 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:05:47,344 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:05:47,347 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-09-10 12:05:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:49,362 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-09-10 12:05:49,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:05:49,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2018-09-10 12:05:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:49,388 INFO L225 Difference]: With dead ends: 691 [2018-09-10 12:05:49,389 INFO L226 Difference]: Without dead ends: 434 [2018-09-10 12:05:49,402 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 [2018-09-10 12:05:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-09-10 12:05:49,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-09-10 12:05:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-09-10 12:05:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 767 transitions. [2018-09-10 12:05:49,493 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 767 transitions. Word has length 42 [2018-09-10 12:05:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:49,494 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 767 transitions. [2018-09-10 12:05:49,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:05:49,494 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 767 transitions. [2018-09-10 12:05:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-10 12:05:49,501 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:49,502 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:49,502 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:49,503 INFO L82 PathProgramCache]: Analyzing trace with hash 737639281, now seen corresponding path program 1 times [2018-09-10 12:05:49,503 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:49,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:49,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:49,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:49,505 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:05:49,878 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:05:49,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:05:49,878 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:05:49,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:05:49,881 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:05:49,881 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:05:49,881 INFO L87 Difference]: Start difference. First operand 434 states and 767 transitions. Second operand 6 states. [2018-09-10 12:05:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:54,374 INFO L93 Difference]: Finished difference Result 1239 states and 2245 transitions. [2018-09-10 12:05:54,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:05:54,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2018-09-10 12:05:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:54,389 INFO L225 Difference]: With dead ends: 1239 [2018-09-10 12:05:54,390 INFO L226 Difference]: Without dead ends: 811 [2018-09-10 12:05:54,394 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 [2018-09-10 12:05:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2018-09-10 12:05:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 793. [2018-09-10 12:05:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2018-09-10 12:05:54,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1286 transitions. [2018-09-10 12:05:54,475 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1286 transitions. Word has length 119 [2018-09-10 12:05:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:54,476 INFO L480 AbstractCegarLoop]: Abstraction has 793 states and 1286 transitions. [2018-09-10 12:05:54,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:05:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1286 transitions. [2018-09-10 12:05:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-10 12:05:54,484 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:54,485 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:54,485 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2003461293, now seen corresponding path program 1 times [2018-09-10 12:05:54,487 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:54,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:54,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:54,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:54,492 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:05:54,704 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:05:54,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:05:54,704 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:05:54,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:05:54,705 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:05:54,705 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:05:54,706 INFO L87 Difference]: Start difference. First operand 793 states and 1286 transitions. Second operand 6 states. [2018-09-10 12:05:57,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:05:57,022 INFO L93 Difference]: Finished difference Result 2180 states and 3699 transitions. [2018-09-10 12:05:57,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:05:57,023 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2018-09-10 12:05:57,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:05:57,035 INFO L225 Difference]: With dead ends: 2180 [2018-09-10 12:05:57,035 INFO L226 Difference]: Without dead ends: 1393 [2018-09-10 12:05:57,039 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 [2018-09-10 12:05:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2018-09-10 12:05:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1369. [2018-09-10 12:05:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1369 states. [2018-09-10 12:05:57,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2183 transitions. [2018-09-10 12:05:57,105 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2183 transitions. Word has length 137 [2018-09-10 12:05:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:05:57,106 INFO L480 AbstractCegarLoop]: Abstraction has 1369 states and 2183 transitions. [2018-09-10 12:05:57,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:05:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2183 transitions. [2018-09-10 12:05:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-10 12:05:57,115 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:05:57,116 INFO L376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:05:57,116 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:05:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash 284885404, now seen corresponding path program 1 times [2018-09-10 12:05:57,117 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:05:57,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:57,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:05:57,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:05:57,118 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:05:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:05:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:05:57,595 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:05:57,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 12:05:57,595 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:05:57,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:05:57,596 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:05:57,597 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-10 12:05:57,597 INFO L87 Difference]: Start difference. First operand 1369 states and 2183 transitions. Second operand 5 states. [2018-09-10 12:06:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:02,350 INFO L93 Difference]: Finished difference Result 3839 states and 6076 transitions. [2018-09-10 12:06:02,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:06:02,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2018-09-10 12:06:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:02,366 INFO L225 Difference]: With dead ends: 3839 [2018-09-10 12:06:02,366 INFO L226 Difference]: Without dead ends: 2476 [2018-09-10 12:06:02,376 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:06:02,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2018-09-10 12:06:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2408. [2018-09-10 12:06:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2408 states. [2018-09-10 12:06:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3424 transitions. [2018-09-10 12:06:02,457 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3424 transitions. Word has length 222 [2018-09-10 12:06:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:02,458 INFO L480 AbstractCegarLoop]: Abstraction has 2408 states and 3424 transitions. [2018-09-10 12:06:02,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:06:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3424 transitions. [2018-09-10 12:06:02,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-10 12:06:02,466 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:02,466 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:06:02,466 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:02,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2105212668, now seen corresponding path program 1 times [2018-09-10 12:06:02,467 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:02,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:02,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:02,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:02,468 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:06:03,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:03,052 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:03,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:03,072 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:03,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:06:03,704 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:06:04,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:04,121 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:06:04,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:04,151 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:04,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:06:04,766 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (3)] Exception during sending of exit command (exit): Broken pipe [2018-09-10 12:06:05,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:06:05,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-09-10 12:06:05,143 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:06:05,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:06:05,145 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:06:05,145 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:06:05,145 INFO L87 Difference]: Start difference. First operand 2408 states and 3424 transitions. Second operand 9 states. [2018-09-10 12:06:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:10,665 INFO L93 Difference]: Finished difference Result 6394 states and 9831 transitions. [2018-09-10 12:06:10,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:06:10,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 232 [2018-09-10 12:06:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:10,696 INFO L225 Difference]: With dead ends: 6394 [2018-09-10 12:06:10,696 INFO L226 Difference]: Without dead ends: 3992 [2018-09-10 12:06:10,725 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 922 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:06:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2018-09-10 12:06:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3942. [2018-09-10 12:06:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3942 states. [2018-09-10 12:06:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 5452 transitions. [2018-09-10 12:06:10,934 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 5452 transitions. Word has length 232 [2018-09-10 12:06:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:10,934 INFO L480 AbstractCegarLoop]: Abstraction has 3942 states and 5452 transitions. [2018-09-10 12:06:10,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:06:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 5452 transitions. [2018-09-10 12:06:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-10 12:06:10,949 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:10,950 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:06:10,950 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:10,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1773550456, now seen corresponding path program 1 times [2018-09-10 12:06:10,950 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:10,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:10,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:10,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:10,952 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:11,586 WARN L175 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-09-10 12:06:12,135 WARN L175 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2018-09-10 12:06:12,262 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2018-09-10 12:06:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:06:12,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:12,929 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:12,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:12,939 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:13,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 12:06:13,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 12:06:13,309 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:06:13,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2018-09-10 12:06:13,310 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:06:13,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:06:13,311 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:06:13,312 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:06:13,312 INFO L87 Difference]: Start difference. First operand 3942 states and 5452 transitions. Second operand 3 states. [2018-09-10 12:06:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:14,736 INFO L93 Difference]: Finished difference Result 9739 states and 14155 transitions. [2018-09-10 12:06:14,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:06:14,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 250 [2018-09-10 12:06:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:14,779 INFO L225 Difference]: With dead ends: 9739 [2018-09-10 12:06:14,779 INFO L226 Difference]: Without dead ends: 5808 [2018-09-10 12:06:14,821 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 498 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:06:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2018-09-10 12:06:14,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5680. [2018-09-10 12:06:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5680 states. [2018-09-10 12:06:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 7590 transitions. [2018-09-10 12:06:15,017 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 7590 transitions. Word has length 250 [2018-09-10 12:06:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:15,017 INFO L480 AbstractCegarLoop]: Abstraction has 5680 states and 7590 transitions. [2018-09-10 12:06:15,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:06:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 7590 transitions. [2018-09-10 12:06:15,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-09-10 12:06:15,040 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:15,041 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:06:15,041 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:15,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1322443291, now seen corresponding path program 1 times [2018-09-10 12:06:15,042 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:15,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:15,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:15,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:15,043 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:15,513 WARN L175 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-09-10 12:06:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:06:15,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:15,951 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:15,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:15,961 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:16,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:16,485 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 12:06:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-10 12:06:16,552 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:16,764 WARN L175 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-10 12:06:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:06:17,393 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:06:17,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 12:06:17,394 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:06:17,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:06:17,395 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:06:17,395 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:06:17,395 INFO L87 Difference]: Start difference. First operand 5680 states and 7590 transitions. Second operand 5 states. [2018-09-10 12:06:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:20,220 INFO L93 Difference]: Finished difference Result 13078 states and 16867 transitions. [2018-09-10 12:06:20,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:06:20,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2018-09-10 12:06:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:20,251 INFO L225 Difference]: With dead ends: 13078 [2018-09-10 12:06:20,251 INFO L226 Difference]: Without dead ends: 6673 [2018-09-10 12:06:20,272 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 517 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:06:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2018-09-10 12:06:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 5899. [2018-09-10 12:06:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5899 states. [2018-09-10 12:06:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5899 states to 5899 states and 7470 transitions. [2018-09-10 12:06:20,404 INFO L78 Accepts]: Start accepts. Automaton has 5899 states and 7470 transitions. Word has length 261 [2018-09-10 12:06:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:20,405 INFO L480 AbstractCegarLoop]: Abstraction has 5899 states and 7470 transitions. [2018-09-10 12:06:20,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:06:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5899 states and 7470 transitions. [2018-09-10 12:06:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-09-10 12:06:20,419 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:20,420 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:06:20,420 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:20,420 INFO L82 PathProgramCache]: Analyzing trace with hash -287807432, now seen corresponding path program 1 times [2018-09-10 12:06:20,420 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:20,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:20,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:20,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:20,422 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:20,918 WARN L175 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:06:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 193 proven. 183 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:06:21,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:21,566 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:21,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:21,575 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:21,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 292 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-10 12:06:22,100 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:22,827 WARN L175 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-09-10 12:06:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 115 proven. 261 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:06:23,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:23,263 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:06:23,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:23,278 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:23,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 292 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-10 12:06:24,098 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 115 proven. 261 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:06:24,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:06:24,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-09-10 12:06:24,743 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:06:24,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-10 12:06:24,745 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-10 12:06:24,745 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-09-10 12:06:24,746 INFO L87 Difference]: Start difference. First operand 5899 states and 7470 transitions. Second operand 15 states. [2018-09-10 12:06:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:29,866 INFO L93 Difference]: Finished difference Result 12148 states and 15473 transitions. [2018-09-10 12:06:29,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-10 12:06:29,867 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 346 [2018-09-10 12:06:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:29,903 INFO L225 Difference]: With dead ends: 12148 [2018-09-10 12:06:29,903 INFO L226 Difference]: Without dead ends: 6414 [2018-09-10 12:06:29,920 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1381 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2018-09-10 12:06:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6414 states. [2018-09-10 12:06:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6414 to 5919. [2018-09-10 12:06:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5919 states. [2018-09-10 12:06:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5919 states to 5919 states and 7104 transitions. [2018-09-10 12:06:30,051 INFO L78 Accepts]: Start accepts. Automaton has 5919 states and 7104 transitions. Word has length 346 [2018-09-10 12:06:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:30,052 INFO L480 AbstractCegarLoop]: Abstraction has 5919 states and 7104 transitions. [2018-09-10 12:06:30,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-10 12:06:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 5919 states and 7104 transitions. [2018-09-10 12:06:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2018-09-10 12:06:30,070 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:30,070 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:06:30,071 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:30,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1745999349, now seen corresponding path program 1 times [2018-09-10 12:06:30,071 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:30,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:30,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:30,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:30,072 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 337 proven. 243 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-09-10 12:06:31,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:31,679 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:31,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:31,689 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:31,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-09-10 12:06:32,009 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 140 proven. 275 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2018-09-10 12:06:32,473 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:06:32,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 5] total 18 [2018-09-10 12:06:32,474 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:06:32,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:06:32,475 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:06:32,475 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:06:32,475 INFO L87 Difference]: Start difference. First operand 5919 states and 7104 transitions. Second operand 5 states. [2018-09-10 12:06:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:34,629 INFO L93 Difference]: Finished difference Result 14526 states and 17742 transitions. [2018-09-10 12:06:34,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:06:34,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 445 [2018-09-10 12:06:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:34,654 INFO L225 Difference]: With dead ends: 14526 [2018-09-10 12:06:34,654 INFO L226 Difference]: Without dead ends: 8613 [2018-09-10 12:06:34,668 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 884 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:06:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8613 states. [2018-09-10 12:06:34,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8613 to 7899. [2018-09-10 12:06:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7899 states. [2018-09-10 12:06:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7899 states to 7899 states and 9458 transitions. [2018-09-10 12:06:34,807 INFO L78 Accepts]: Start accepts. Automaton has 7899 states and 9458 transitions. Word has length 445 [2018-09-10 12:06:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:34,807 INFO L480 AbstractCegarLoop]: Abstraction has 7899 states and 9458 transitions. [2018-09-10 12:06:34,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:06:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7899 states and 9458 transitions. [2018-09-10 12:06:34,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2018-09-10 12:06:34,835 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:34,836 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:06:34,836 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash 468259100, now seen corresponding path program 1 times [2018-09-10 12:06:34,837 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:34,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:34,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:34,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:34,838 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:35,205 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-09-10 12:06:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 402 proven. 474 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2018-09-10 12:06:35,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:35,687 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:35,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:35,699 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:35,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 833 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-09-10 12:06:36,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 344 proven. 144 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-09-10 12:06:36,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:36,557 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:06:36,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:36,572 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:36,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 829 proven. 6 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-09-10 12:06:37,226 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 344 proven. 144 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-09-10 12:06:37,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:06:37,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 16 [2018-09-10 12:06:37,623 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:06:37,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-10 12:06:37,625 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-10 12:06:37,625 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:06:37,626 INFO L87 Difference]: Start difference. First operand 7899 states and 9458 transitions. Second operand 14 states. [2018-09-10 12:06:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:44,006 INFO L93 Difference]: Finished difference Result 17817 states and 21592 transitions. [2018-09-10 12:06:44,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-10 12:06:44,007 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 556 [2018-09-10 12:06:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:44,031 INFO L225 Difference]: With dead ends: 17817 [2018-09-10 12:06:44,031 INFO L226 Difference]: Without dead ends: 9324 [2018-09-10 12:06:44,122 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2294 GetRequests, 2247 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2018-09-10 12:06:44,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2018-09-10 12:06:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 9037. [2018-09-10 12:06:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9037 states. [2018-09-10 12:06:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9037 states to 9037 states and 10224 transitions. [2018-09-10 12:06:44,261 INFO L78 Accepts]: Start accepts. Automaton has 9037 states and 10224 transitions. Word has length 556 [2018-09-10 12:06:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:44,262 INFO L480 AbstractCegarLoop]: Abstraction has 9037 states and 10224 transitions. [2018-09-10 12:06:44,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-10 12:06:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9037 states and 10224 transitions. [2018-09-10 12:06:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-09-10 12:06:44,289 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:44,289 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:06:44,290 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:44,290 INFO L82 PathProgramCache]: Analyzing trace with hash 842969381, now seen corresponding path program 1 times [2018-09-10 12:06:44,290 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:44,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:44,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:44,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:44,291 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:44,835 WARN L175 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 12:06:45,015 WARN L175 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 12:06:45,231 WARN L175 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:06:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 506 proven. 471 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-10 12:06:46,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:46,068 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:46,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:46,078 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:46,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:46,692 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:06:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 852 proven. 2 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-10 12:06:47,345 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 500 proven. 105 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2018-09-10 12:06:48,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:48,226 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:06:48,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:48,241 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:06:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:48,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 644 proven. 210 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-10 12:06:49,075 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 211 proven. 674 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:06:50,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:06:50,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-09-10 12:06:50,040 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:06:50,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 12:06:50,041 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 12:06:50,041 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:06:50,041 INFO L87 Difference]: Start difference. First operand 9037 states and 10224 transitions. Second operand 13 states. [2018-09-10 12:06:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:53,443 INFO L93 Difference]: Finished difference Result 18289 states and 21232 transitions. [2018-09-10 12:06:53,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:06:53,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 567 [2018-09-10 12:06:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:53,475 INFO L225 Difference]: With dead ends: 18289 [2018-09-10 12:06:53,476 INFO L226 Difference]: Without dead ends: 9420 [2018-09-10 12:06:53,494 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2298 GetRequests, 2257 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-09-10 12:06:53,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2018-09-10 12:06:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9205. [2018-09-10 12:06:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9205 states. [2018-09-10 12:06:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9205 states to 9205 states and 10206 transitions. [2018-09-10 12:06:53,667 INFO L78 Accepts]: Start accepts. Automaton has 9205 states and 10206 transitions. Word has length 567 [2018-09-10 12:06:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:53,667 INFO L480 AbstractCegarLoop]: Abstraction has 9205 states and 10206 transitions. [2018-09-10 12:06:53,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 12:06:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 9205 states and 10206 transitions. [2018-09-10 12:06:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2018-09-10 12:06:53,688 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:53,689 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:06:53,689 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:06:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash 27461053, now seen corresponding path program 2 times [2018-09-10 12:06:53,690 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:53,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:53,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:53,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:53,691 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:54,852 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-10 12:06:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 653 proven. 656 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2018-09-10 12:06:55,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:55,735 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:06:55,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 12:06:55,744 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 12:06:55,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 12:06:55,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 12:06:55,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 1162 proven. 2 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2018-09-10 12:06:56,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 466 proven. 144 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2018-09-10 12:06:57,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:06:57,151 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:06:57,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-10 12:06:57,166 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-10 12:06:57,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-10 12:06:57,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-10 12:06:57,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:06:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 1079 proven. 8 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-09-10 12:06:58,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:06:58,391 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-09-10 12:06:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 79 proven. 1039 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2018-09-10 12:06:59,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:06:59,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 8, 9] total 31 [2018-09-10 12:06:59,730 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:06:59,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-10 12:06:59,731 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-10 12:06:59,732 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2018-09-10 12:06:59,732 INFO L87 Difference]: Start difference. First operand 9205 states and 10206 transitions. Second operand 19 states. [2018-09-10 12:07:06,895 WARN L175 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2018-09-10 12:07:07,970 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2018-09-10 12:07:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:09,361 INFO L93 Difference]: Finished difference Result 20275 states and 23286 transitions. [2018-09-10 12:07:09,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-10 12:07:09,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 667 [2018-09-10 12:07:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:09,390 INFO L225 Difference]: With dead ends: 20275 [2018-09-10 12:07:09,391 INFO L226 Difference]: Without dead ends: 10336 [2018-09-10 12:07:09,417 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2671 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=926, Invalid=4044, Unknown=0, NotChecked=0, Total=4970 [2018-09-10 12:07:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10336 states. [2018-09-10 12:07:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10336 to 9145. [2018-09-10 12:07:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9145 states. [2018-09-10 12:07:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9145 states to 9145 states and 10030 transitions. [2018-09-10 12:07:09,603 INFO L78 Accepts]: Start accepts. Automaton has 9145 states and 10030 transitions. Word has length 667 [2018-09-10 12:07:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:09,604 INFO L480 AbstractCegarLoop]: Abstraction has 9145 states and 10030 transitions. [2018-09-10 12:07:09,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-10 12:07:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 9145 states and 10030 transitions. [2018-09-10 12:07:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2018-09-10 12:07:09,623 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:09,624 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:07:09,624 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:07:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1733374948, now seen corresponding path program 1 times [2018-09-10 12:07:09,625 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:09,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:09,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-10 12:07:09,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:09,626 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 533 proven. 134 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-10 12:07:10,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:10,748 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:07:10,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:10,762 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:10,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 956 proven. 2 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-09-10 12:07:11,229 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 533 proven. 134 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-10 12:07:11,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:11,606 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:07:11,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:11,624 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:12,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 956 proven. 2 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-09-10 12:07:12,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 533 proven. 134 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-09-10 12:07:12,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:07:12,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-09-10 12:07:12,687 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:07:12,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:07:12,688 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:07:12,688 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:07:12,689 INFO L87 Difference]: Start difference. First operand 9145 states and 10030 transitions. Second operand 7 states. [2018-09-10 12:07:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:14,997 INFO L93 Difference]: Finished difference Result 24802 states and 30121 transitions. [2018-09-10 12:07:14,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 12:07:14,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 696 [2018-09-10 12:07:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:15,059 INFO L225 Difference]: With dead ends: 24802 [2018-09-10 12:07:15,059 INFO L226 Difference]: Without dead ends: 15849 [2018-09-10 12:07:15,094 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2800 GetRequests, 2785 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:07:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15849 states. [2018-09-10 12:07:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15849 to 15315. [2018-09-10 12:07:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15315 states. [2018-09-10 12:07:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15315 states to 15315 states and 17039 transitions. [2018-09-10 12:07:15,425 INFO L78 Accepts]: Start accepts. Automaton has 15315 states and 17039 transitions. Word has length 696 [2018-09-10 12:07:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:15,425 INFO L480 AbstractCegarLoop]: Abstraction has 15315 states and 17039 transitions. [2018-09-10 12:07:15,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:07:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 15315 states and 17039 transitions. [2018-09-10 12:07:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2018-09-10 12:07:15,440 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:15,441 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:07:15,441 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:07:15,441 INFO L82 PathProgramCache]: Analyzing trace with hash -894345036, now seen corresponding path program 1 times [2018-09-10 12:07:15,442 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:15,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:15,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:15,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:15,442 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 788 proven. 480 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-09-10 12:07:17,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:17,684 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:07:17,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:17,695 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:17,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 1289 proven. 2 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2018-09-10 12:07:18,441 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 736 proven. 134 refuted. 0 times theorem prover too weak. 1118 trivial. 0 not checked. [2018-09-10 12:07:18,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:18,959 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:07:18,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:18,978 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:19,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 1289 proven. 2 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2018-09-10 12:07:20,065 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 736 proven. 134 refuted. 0 times theorem prover too weak. 1118 trivial. 0 not checked. [2018-09-10 12:07:20,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:07:20,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 22 [2018-09-10 12:07:20,488 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:07:20,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-10 12:07:20,489 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-10 12:07:20,490 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:07:20,490 INFO L87 Difference]: Start difference. First operand 15315 states and 17039 transitions. Second operand 20 states. [2018-09-10 12:07:23,415 WARN L175 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2018-09-10 12:07:28,944 WARN L175 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2018-09-10 12:07:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:32,136 INFO L93 Difference]: Finished difference Result 32167 states and 36959 transitions. [2018-09-10 12:07:32,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-10 12:07:32,136 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 856 [2018-09-10 12:07:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:32,175 INFO L225 Difference]: With dead ends: 32167 [2018-09-10 12:07:32,176 INFO L226 Difference]: Without dead ends: 13712 [2018-09-10 12:07:32,224 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3545 GetRequests, 3458 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1356, Invalid=5954, Unknown=0, NotChecked=0, Total=7310 [2018-09-10 12:07:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13712 states. [2018-09-10 12:07:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13712 to 12568. [2018-09-10 12:07:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12568 states. [2018-09-10 12:07:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 13450 transitions. [2018-09-10 12:07:32,439 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 13450 transitions. Word has length 856 [2018-09-10 12:07:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:32,440 INFO L480 AbstractCegarLoop]: Abstraction has 12568 states and 13450 transitions. [2018-09-10 12:07:32,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-10 12:07:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 13450 transitions. [2018-09-10 12:07:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2018-09-10 12:07:32,455 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:32,455 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:07:32,456 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:07:32,456 INFO L82 PathProgramCache]: Analyzing trace with hash 549859241, now seen corresponding path program 1 times [2018-09-10 12:07:32,456 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:32,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:32,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:32,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:32,457 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:33,544 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:07:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 879 proven. 1286 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2018-09-10 12:07:34,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:34,878 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:07:34,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:34,886 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:35,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 1865 proven. 2 refuted. 0 times theorem prover too weak. 1138 trivial. 0 not checked. [2018-09-10 12:07:35,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 895 proven. 182 refuted. 0 times theorem prover too weak. 1928 trivial. 0 not checked. [2018-09-10 12:07:36,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:36,742 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:07:36,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:36,757 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:37,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 1860 proven. 25 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2018-09-10 12:07:37,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 895 proven. 182 refuted. 0 times theorem prover too weak. 1928 trivial. 0 not checked. [2018-09-10 12:07:38,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:07:38,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6, 5, 5] total 22 [2018-09-10 12:07:38,618 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:07:38,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-10 12:07:38,621 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-10 12:07:38,621 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:07:38,621 INFO L87 Difference]: Start difference. First operand 12568 states and 13450 transitions. Second operand 17 states. [2018-09-10 12:07:38,791 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2018-09-10 12:07:42,306 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2018-09-10 12:07:42,645 WARN L175 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2018-09-10 12:07:43,790 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2018-09-10 12:07:44,008 WARN L175 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2018-09-10 12:07:44,441 WARN L175 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2018-09-10 12:07:46,610 WARN L175 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2018-09-10 12:07:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:47,901 INFO L93 Difference]: Finished difference Result 25804 states and 28335 transitions. [2018-09-10 12:07:47,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-10 12:07:47,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 963 [2018-09-10 12:07:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:47,937 INFO L225 Difference]: With dead ends: 25804 [2018-09-10 12:07:47,938 INFO L226 Difference]: Without dead ends: 13428 [2018-09-10 12:07:47,964 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3941 GetRequests, 3877 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=939, Invalid=3351, Unknown=0, NotChecked=0, Total=4290 [2018-09-10 12:07:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13428 states. [2018-09-10 12:07:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13428 to 12630. [2018-09-10 12:07:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12630 states. [2018-09-10 12:07:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12630 states to 12630 states and 13406 transitions. [2018-09-10 12:07:48,189 INFO L78 Accepts]: Start accepts. Automaton has 12630 states and 13406 transitions. Word has length 963 [2018-09-10 12:07:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:48,190 INFO L480 AbstractCegarLoop]: Abstraction has 12630 states and 13406 transitions. [2018-09-10 12:07:48,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-10 12:07:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 12630 states and 13406 transitions. [2018-09-10 12:07:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1003 [2018-09-10 12:07:48,206 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:48,207 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:07:48,207 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:07:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1193503768, now seen corresponding path program 1 times [2018-09-10 12:07:48,208 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:48,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:48,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:48,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:48,209 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 682 proven. 1363 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2018-09-10 12:07:51,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:51,057 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:07:51,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:51,065 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:51,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 2048 proven. 2 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2018-09-10 12:07:51,830 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 683 proven. 431 refuted. 0 times theorem prover too weak. 1902 trivial. 0 not checked. [2018-09-10 12:07:52,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:52,751 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:07:52,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:52,774 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:53,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 1935 proven. 6 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2018-09-10 12:07:54,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 1314 proven. 257 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2018-09-10 12:07:55,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:07:55,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 7, 8] total 31 [2018-09-10 12:07:55,238 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:07:55,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-10 12:07:55,240 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-10 12:07:55,240 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2018-09-10 12:07:55,240 INFO L87 Difference]: Start difference. First operand 12630 states and 13406 transitions. Second operand 18 states. [2018-09-10 12:07:59,070 WARN L175 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2018-09-10 12:08:00,673 WARN L175 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2018-09-10 12:08:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:08:04,827 INFO L93 Difference]: Finished difference Result 24777 states and 26372 transitions. [2018-09-10 12:08:04,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-10 12:08:04,827 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1002 [2018-09-10 12:08:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:08:04,850 INFO L225 Difference]: With dead ends: 24777 [2018-09-10 12:08:04,850 INFO L226 Difference]: Without dead ends: 11749 [2018-09-10 12:08:04,871 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4092 GetRequests, 4020 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=965, Invalid=4437, Unknown=0, NotChecked=0, Total=5402 [2018-09-10 12:08:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11749 states. [2018-09-10 12:08:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11749 to 11488. [2018-09-10 12:08:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11488 states. [2018-09-10 12:08:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11488 states to 11488 states and 12042 transitions. [2018-09-10 12:08:05,044 INFO L78 Accepts]: Start accepts. Automaton has 11488 states and 12042 transitions. Word has length 1002 [2018-09-10 12:08:05,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:08:05,045 INFO L480 AbstractCegarLoop]: Abstraction has 11488 states and 12042 transitions. [2018-09-10 12:08:05,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-10 12:08:05,045 INFO L276 IsEmpty]: Start isEmpty. Operand 11488 states and 12042 transitions. [2018-09-10 12:08:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1085 [2018-09-10 12:08:05,060 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:08:05,061 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:08:05,061 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:08:05,062 INFO L82 PathProgramCache]: Analyzing trace with hash -122340164, now seen corresponding path program 1 times [2018-09-10 12:08:05,062 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:08:05,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:05,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:05,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:05,063 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:08:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1519 proven. 184 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2018-09-10 12:08:06,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:06,421 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:08:06,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:06,429 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:06,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 2217 proven. 6 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2018-09-10 12:08:07,244 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1519 proven. 257 refuted. 0 times theorem prover too weak. 1924 trivial. 0 not checked. [2018-09-10 12:08:08,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:08,323 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:08:08,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:08,338 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:09,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 2217 proven. 6 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2018-09-10 12:08:09,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1519 proven. 257 refuted. 0 times theorem prover too weak. 1924 trivial. 0 not checked. [2018-09-10 12:08:10,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:08:10,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-09-10 12:08:10,267 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:08:10,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:08:10,269 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:08:10,269 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:08:10,269 INFO L87 Difference]: Start difference. First operand 11488 states and 12042 transitions. Second operand 9 states. [2018-09-10 12:08:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:08:13,497 INFO L93 Difference]: Finished difference Result 26362 states and 27670 transitions. [2018-09-10 12:08:13,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 12:08:13,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1084 [2018-09-10 12:08:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:08:13,523 INFO L225 Difference]: With dead ends: 26362 [2018-09-10 12:08:13,524 INFO L226 Difference]: Without dead ends: 15065 [2018-09-10 12:08:13,539 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4352 GetRequests, 4332 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:08:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15065 states. [2018-09-10 12:08:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15065 to 13493. [2018-09-10 12:08:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13493 states. [2018-09-10 12:08:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 14158 transitions. [2018-09-10 12:08:13,749 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 14158 transitions. Word has length 1084 [2018-09-10 12:08:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:08:13,750 INFO L480 AbstractCegarLoop]: Abstraction has 13493 states and 14158 transitions. [2018-09-10 12:08:13,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:08:13,750 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 14158 transitions. [2018-09-10 12:08:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1719 [2018-09-10 12:08:13,781 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:08:13,782 INFO L376 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-09-10 12:08:13,783 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:08:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1416395048, now seen corresponding path program 1 times [2018-09-10 12:08:13,783 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:08:13,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:13,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:13,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:13,784 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:08:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 1567 proven. 5277 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2018-09-10 12:08:19,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:19,615 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:08:19,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:19,624 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:20,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:24,363 WARN L175 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 39 [2018-09-10 12:08:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 2938 proven. 68 refuted. 0 times theorem prover too weak. 5965 trivial. 0 not checked. [2018-09-10 12:08:25,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 3000 proven. 127 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-09-10 12:08:39,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:39,286 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:08:39,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:39,302 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:40,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:48,659 WARN L175 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2018-09-10 12:08:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 2938 proven. 68 refuted. 0 times theorem prover too weak. 5965 trivial. 0 not checked. [2018-09-10 12:08:54,001 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:09:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 3000 proven. 127 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-09-10 12:09:04,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:09:04,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 8, 9, 9, 9] total 42 [2018-09-10 12:09:04,173 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:09:04,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-10 12:09:04,175 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-10 12:09:04,176 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1495, Unknown=8, NotChecked=0, Total=1722 [2018-09-10 12:09:04,176 INFO L87 Difference]: Start difference. First operand 13493 states and 14158 transitions. Second operand 33 states. [2018-09-10 12:09:04,933 WARN L175 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2018-09-10 12:09:08,023 WARN L175 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-09-10 12:09:08,326 WARN L175 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2018-09-10 12:09:09,133 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2018-09-10 12:09:09,986 WARN L175 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 Received shutdown request... [2018-09-10 12:09:41,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-10 12:09:41,595 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:09:41,602 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:09:41,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:09:41 BoogieIcfgContainer [2018-09-10 12:09:41,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:09:41,604 INFO L168 Benchmark]: Toolchain (without parser) took 240384.45 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-09-10 12:09:41,605 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:09:41,606 INFO L168 Benchmark]: CACSL2BoogieTranslator took 896.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-10 12:09:41,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 133.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-10 12:09:41,607 INFO L168 Benchmark]: Boogie Preprocessor took 285.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 775.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -877.9 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. [2018-09-10 12:09:41,607 INFO L168 Benchmark]: RCFGBuilder took 4193.58 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 135.9 MB). Peak memory consumption was 135.9 MB. Max. memory is 7.1 GB. [2018-09-10 12:09:41,608 INFO L168 Benchmark]: TraceAbstraction took 234866.72 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -499.8 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-09-10 12:09:41,612 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 896.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 133.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 285.97 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 775.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -877.9 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4193.58 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 135.9 MB). Peak memory consumption was 135.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234866.72 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -499.8 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 109). Cancelled while BasicCegarLoop was constructing difference of abstraction (13493states) and FLOYD_HOARE automaton (currently 25 states, 33 states before enhancement), while ReachableStatesComputation was computing reachable states (1182 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 234.7s OverallTime, 18 OverallIterations, 14 TraceHistogramMax, 124.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1919 SDtfs, 36663 SDslu, 4322 SDs, 0 SdLazy, 55023 SolverSat, 7025 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 82.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37366 GetRequests, 36727 SyntacticMatches, 69 SemanticMatches, 570 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8739 ImplicationChecksByTransitivity, 73.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15315occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 17 MinimizatonAttempts, 8273 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 9.0s SatisfiabilityAnalysisTime, 84.7s InterpolantComputationTime, 28493 NumberOfCodeBlocks, 28493 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 46755 ConstructedInterpolants, 618 QuantifiedInterpolants, 186325689 SizeOfPredicates, 70 NumberOfNonLiveVariables, 26635 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 68 InterpolantComputations, 8 PerfectInterpolantSequences, 118675/135570 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label51_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-09-41-624.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label51_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-09-41-624.csv Completed graceful shutdown