java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:04:09,600 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:04:09,603 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:04:09,615 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:04:09,615 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:04:09,617 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:04:09,618 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:04:09,620 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:04:09,624 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:04:09,626 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:04:09,628 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:04:09,629 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:04:09,630 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:04:09,630 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:04:09,635 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:04:09,636 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:04:09,637 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:04:09,639 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:04:09,649 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:04:09,653 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:04:09,656 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:04:09,658 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:04:09,663 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:04:09,663 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:04:09,664 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:04:09,666 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:04:09,667 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:04:09,669 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:04:09,669 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:04:09,674 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:04:09,674 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:04:09,675 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:04:09,676 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:04:09,677 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:04:09,679 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:04:09,680 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:04:09,680 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 [2018-07-24 14:04:09,709 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:04:09,709 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:04:09,711 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:04:09,711 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:04:09,711 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:04:09,712 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:04:09,712 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:04:09,712 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:04:09,713 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:04:09,713 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:04:09,713 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:04:09,714 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:04:09,715 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:04:09,715 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:04:09,716 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:04:09,716 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:04:09,716 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:04:09,716 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:04:09,716 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:04:09,717 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:04:09,717 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:04:09,717 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:04:09,717 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:04:09,719 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:04:09,719 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:04:09,719 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:04:09,719 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:04:09,720 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:04:09,720 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:04:09,720 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:04:09,720 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:04:09,720 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:04:09,721 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:04:09,774 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:04:09,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:04:09,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:04:09,797 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:04:09,798 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:04:09,799 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c [2018-07-24 14:04:10,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52f30e92/01a10629bf544e438582d22b3d53ea8e/FLAGa9c2cc61e [2018-07-24 14:04:10,484 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:04:10,485 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c [2018-07-24 14:04:10,508 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52f30e92/01a10629bf544e438582d22b3d53ea8e/FLAGa9c2cc61e [2018-07-24 14:04:10,524 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52f30e92/01a10629bf544e438582d22b3d53ea8e [2018-07-24 14:04:10,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:04:10,537 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:04:10,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:04:10,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:04:10,545 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:04:10,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:04:10" (1/1) ... [2018-07-24 14:04:10,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3486e555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:10, skipping insertion in model container [2018-07-24 14:04:10,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:04:10" (1/1) ... [2018-07-24 14:04:10,780 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:04:11,244 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:04:11,264 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:04:11,444 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:04:11,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11 WrapperNode [2018-07-24 14:04:11,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:04:11,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:04:11,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:04:11,520 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:04:11,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (1/1) ... [2018-07-24 14:04:11,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (1/1) ... [2018-07-24 14:04:11,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:04:11,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:04:11,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:04:11,721 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:04:11,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (1/1) ... [2018-07-24 14:04:11,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (1/1) ... [2018-07-24 14:04:11,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (1/1) ... [2018-07-24 14:04:11,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (1/1) ... [2018-07-24 14:04:12,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (1/1) ... [2018-07-24 14:04:12,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (1/1) ... [2018-07-24 14:04:12,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (1/1) ... [2018-07-24 14:04:12,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:04:12,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:04:12,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:04:12,116 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:04:12,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (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 [2018-07-24 14:04:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:04:12,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:04:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:04:12,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:04:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:04:12,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:04:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:04:12,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:04:17,631 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:04:17,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:04:17 BoogieIcfgContainer [2018-07-24 14:04:17,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:04:17,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:04:17,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:04:17,637 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:04:17,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:04:10" (1/3) ... [2018-07-24 14:04:17,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba8aeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:04:17, skipping insertion in model container [2018-07-24 14:04:17,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:04:11" (2/3) ... [2018-07-24 14:04:17,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba8aeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:04:17, skipping insertion in model container [2018-07-24 14:04:17,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:04:17" (3/3) ... [2018-07-24 14:04:17,641 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label54_true-unreach-call.c [2018-07-24 14:04:17,651 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:04:17,660 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:04:17,716 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:04:17,717 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:04:17,718 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:04:17,718 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:04:17,718 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:04:17,718 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:04:17,718 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:04:17,719 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:04:17,719 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:04:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-07-24 14:04:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-07-24 14:04:17,763 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:04:17,764 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:04:17,764 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:04:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash -639357604, now seen corresponding path program 1 times [2018-07-24 14:04:17,772 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:04:17,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:17,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:17,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:17,819 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:04:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:04:18,301 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:04:18,302 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:04:18,302 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:04:18,308 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:04:18,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:04:18,325 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:04:18,327 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-07-24 14:04:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:04:21,819 INFO L93 Difference]: Finished difference Result 979 states and 1754 transitions. [2018-07-24 14:04:21,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:04:21,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-07-24 14:04:21,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:04:21,846 INFO L225 Difference]: With dead ends: 979 [2018-07-24 14:04:21,846 INFO L226 Difference]: Without dead ends: 680 [2018-07-24 14:04:21,855 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:04:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-07-24 14:04:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 484. [2018-07-24 14:04:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-07-24 14:04:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 730 transitions. [2018-07-24 14:04:21,947 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 730 transitions. Word has length 44 [2018-07-24 14:04:21,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:04:21,948 INFO L471 AbstractCegarLoop]: Abstraction has 484 states and 730 transitions. [2018-07-24 14:04:21,948 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:04:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 730 transitions. [2018-07-24 14:04:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-24 14:04:21,955 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:04:21,955 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:04:21,956 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:04:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1151248341, now seen corresponding path program 1 times [2018-07-24 14:04:21,956 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:04:21,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:21,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:21,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:21,958 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:04:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:04:22,302 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:04:22,303 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:04:22,303 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:04:22,305 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:04:22,305 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:04:22,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:04:22,306 INFO L87 Difference]: Start difference. First operand 484 states and 730 transitions. Second operand 6 states. [2018-07-24 14:04:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:04:28,502 INFO L93 Difference]: Finished difference Result 1555 states and 2493 transitions. [2018-07-24 14:04:28,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:04:28,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2018-07-24 14:04:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:04:28,513 INFO L225 Difference]: With dead ends: 1555 [2018-07-24 14:04:28,513 INFO L226 Difference]: Without dead ends: 1077 [2018-07-24 14:04:28,517 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:04:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2018-07-24 14:04:28,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1063. [2018-07-24 14:04:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2018-07-24 14:04:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1592 transitions. [2018-07-24 14:04:28,582 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1592 transitions. Word has length 117 [2018-07-24 14:04:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:04:28,583 INFO L471 AbstractCegarLoop]: Abstraction has 1063 states and 1592 transitions. [2018-07-24 14:04:28,583 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:04:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1592 transitions. [2018-07-24 14:04:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-07-24 14:04:28,589 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:04:28,592 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:04:28,593 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:04:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash 731087552, now seen corresponding path program 1 times [2018-07-24 14:04:28,593 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:04:28,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:28,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:28,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:28,596 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:04:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:04:29,045 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:04:29,045 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-24 14:04:29,046 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:04:29,046 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:04:29,047 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:04:29,047 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:04:29,047 INFO L87 Difference]: Start difference. First operand 1063 states and 1592 transitions. Second operand 7 states. [2018-07-24 14:04:35,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:04:35,737 INFO L93 Difference]: Finished difference Result 2979 states and 4525 transitions. [2018-07-24 14:04:35,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:04:35,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2018-07-24 14:04:35,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:04:35,751 INFO L225 Difference]: With dead ends: 2979 [2018-07-24 14:04:35,751 INFO L226 Difference]: Without dead ends: 1922 [2018-07-24 14:04:35,758 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:04:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2018-07-24 14:04:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1813. [2018-07-24 14:04:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1813 states. [2018-07-24 14:04:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2564 transitions. [2018-07-24 14:04:35,839 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2564 transitions. Word has length 118 [2018-07-24 14:04:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:04:35,840 INFO L471 AbstractCegarLoop]: Abstraction has 1813 states and 2564 transitions. [2018-07-24 14:04:35,840 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:04:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2564 transitions. [2018-07-24 14:04:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-07-24 14:04:35,849 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:04:35,849 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:04:35,853 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:04:35,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1842858103, now seen corresponding path program 1 times [2018-07-24 14:04:35,854 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:04:35,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:35,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:35,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:35,856 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:04:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:04:36,342 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:04:36,342 INFO L191 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 [2018-07-24 14:04:36,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:36,353 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:04:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:36,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:04:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:04:36,652 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:04:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:04:37,211 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:04:37,212 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 14:04:37,212 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:04:37,212 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:04:37,213 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:04:37,213 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:04:37,218 INFO L87 Difference]: Start difference. First operand 1813 states and 2564 transitions. Second operand 3 states. [2018-07-24 14:04:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:04:39,560 INFO L93 Difference]: Finished difference Result 4033 states and 5956 transitions. [2018-07-24 14:04:39,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:04:39,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2018-07-24 14:04:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:04:39,574 INFO L225 Difference]: With dead ends: 4033 [2018-07-24 14:04:39,574 INFO L226 Difference]: Without dead ends: 2226 [2018-07-24 14:04:39,582 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 352 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:04:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2018-07-24 14:04:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2217. [2018-07-24 14:04:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2217 states. [2018-07-24 14:04:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3161 transitions. [2018-07-24 14:04:39,649 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3161 transitions. Word has length 176 [2018-07-24 14:04:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:04:39,650 INFO L471 AbstractCegarLoop]: Abstraction has 2217 states and 3161 transitions. [2018-07-24 14:04:39,650 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:04:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3161 transitions. [2018-07-24 14:04:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-07-24 14:04:39,656 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:04:39,657 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:04:39,657 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:04:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1021024169, now seen corresponding path program 1 times [2018-07-24 14:04:39,657 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:04:39,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:39,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:39,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:39,659 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:04:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:40,246 WARN L169 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-07-24 14:04:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-07-24 14:04:40,630 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:04:40,630 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:04:40,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:40,644 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:04:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:40,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:04:43,017 WARN L1032 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_1 Int)) (let ((.cse1 (* 9 v_prenex_1))) (let ((.cse2 (div .cse1 10))) (let ((.cse0 (mod (+ .cse2 30) 90))) (and (not (= 0 .cse0)) (not (= (mod .cse1 10) 0)) (<= (+ c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 42) .cse0) (< .cse1 0) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_1) (< (+ .cse2 58980) 0)))))) (exists ((v_prenex_3 Int)) (let ((.cse4 (* 9 v_prenex_3))) (let ((.cse3 (div .cse4 10))) (and (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_3) (<= 0 (+ .cse3 58979)) (<= 0 .cse4) (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ (mod (+ .cse3 29) 90) 48)))))) (exists ((v_prenex_2 Int)) (let ((.cse6 (* 9 v_prenex_2))) (let ((.cse7 (div .cse6 10))) (let ((.cse5 (mod (+ .cse7 29) 90))) (and (not (= .cse5 0)) (= (mod .cse6 10) 0) (< (+ .cse7 58979) 0) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_2) (<= (+ c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 42) .cse5)))))) (exists ((v_prenex_4 Int)) (let ((.cse9 (* 9 v_prenex_4))) (let ((.cse8 (mod (+ (div .cse9 10) 29) 90))) (and (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ .cse8 48)) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_4) (= .cse8 0) (= (mod .cse9 10) 0))))) (exists ((v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0_486 Int)) (let ((.cse10 (* 9 v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0_486))) (let ((.cse11 (mod (+ (div .cse10 10) 29) 90))) (and (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0_486) (<= 0 .cse10) (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ .cse11 48)) (= .cse11 0))))) (exists ((v_prenex_5 Int)) (let ((.cse13 (* 9 v_prenex_5))) (let ((.cse12 (div .cse13 10))) (and (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ (mod (+ .cse12 29) 90) 48)) (<= 0 (+ .cse12 58979)) (= (mod .cse13 10) 0) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_5))))) (exists ((v_prenex_7 Int)) (let ((.cse14 (* 9 v_prenex_7))) (let ((.cse15 (div .cse14 10))) (let ((.cse16 (mod (+ .cse15 29) 90))) (and (<= 0 .cse14) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_7) (< (+ .cse15 58979) 0) (<= (+ c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 42) .cse16) (not (= .cse16 0))))))) (exists ((v_prenex_6 Int)) (let ((.cse17 (* 9 v_prenex_6))) (let ((.cse18 (mod (+ (div .cse17 10) 30) 90))) (and (< .cse17 0) (not (= (mod .cse17 10) 0)) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_6) (= 0 .cse18) (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ .cse18 48)))))) (exists ((v_prenex_8 Int)) (let ((.cse19 (* 9 v_prenex_8))) (let ((.cse20 (div .cse19 10))) (and (not (= (mod .cse19 10) 0)) (<= 0 (+ .cse20 58980)) (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ (mod (+ .cse20 30) 90) 48)) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_8) (< .cse19 0)))))) is different from true [2018-07-24 14:04:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 71 trivial. 2 not checked. [2018-07-24 14:04:44,202 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:04:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-07-24 14:04:44,905 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:04:44,906 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 9 [2018-07-24 14:04:44,906 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:04:44,907 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:04:44,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:04:44,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=41, Unknown=1, NotChecked=12, Total=72 [2018-07-24 14:04:44,908 INFO L87 Difference]: Start difference. First operand 2217 states and 3161 transitions. Second operand 3 states. [2018-07-24 14:04:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:04:48,436 INFO L93 Difference]: Finished difference Result 5467 states and 8136 transitions. [2018-07-24 14:04:48,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:04:48,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2018-07-24 14:04:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:04:48,454 INFO L225 Difference]: With dead ends: 5467 [2018-07-24 14:04:48,455 INFO L226 Difference]: Without dead ends: 3256 [2018-07-24 14:04:48,466 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 468 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=18, Invalid=41, Unknown=1, NotChecked=12, Total=72 [2018-07-24 14:04:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2018-07-24 14:04:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 3222. [2018-07-24 14:04:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3222 states. [2018-07-24 14:04:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 4674 transitions. [2018-07-24 14:04:48,544 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 4674 transitions. Word has length 235 [2018-07-24 14:04:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:04:48,545 INFO L471 AbstractCegarLoop]: Abstraction has 3222 states and 4674 transitions. [2018-07-24 14:04:48,545 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:04:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 4674 transitions. [2018-07-24 14:04:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-07-24 14:04:48,551 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:04:48,551 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:04:48,552 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:04:48,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1339442454, now seen corresponding path program 1 times [2018-07-24 14:04:48,552 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:04:48,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:48,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:48,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:48,553 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:04:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-07-24 14:04:48,816 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:04:48,817 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:04:48,817 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:04:48,817 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:04:48,818 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:04:48,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:04:48,818 INFO L87 Difference]: Start difference. First operand 3222 states and 4674 transitions. Second operand 4 states. [2018-07-24 14:04:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:04:54,468 INFO L93 Difference]: Finished difference Result 9230 states and 13962 transitions. [2018-07-24 14:04:54,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:04:54,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 256 [2018-07-24 14:04:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:04:54,499 INFO L225 Difference]: With dead ends: 9230 [2018-07-24 14:04:54,500 INFO L226 Difference]: Without dead ends: 6014 [2018-07-24 14:04:54,518 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:04:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2018-07-24 14:04:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 5682. [2018-07-24 14:04:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5682 states. [2018-07-24 14:04:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5682 states to 5682 states and 8239 transitions. [2018-07-24 14:04:54,679 INFO L78 Accepts]: Start accepts. Automaton has 5682 states and 8239 transitions. Word has length 256 [2018-07-24 14:04:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:04:54,680 INFO L471 AbstractCegarLoop]: Abstraction has 5682 states and 8239 transitions. [2018-07-24 14:04:54,680 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:04:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5682 states and 8239 transitions. [2018-07-24 14:04:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-07-24 14:04:54,689 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:04:54,690 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:04:54,690 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:04:54,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1846592885, now seen corresponding path program 1 times [2018-07-24 14:04:54,697 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:04:54,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:54,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:54,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:04:54,698 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:04:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-07-24 14:04:55,527 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:04:55,527 INFO L191 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 [2018-07-24 14:04:55,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:55,536 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:04:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:55,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:04:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:04:55,922 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:04:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:04:56,522 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:04:56,522 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:04:56,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:04:56,539 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:04:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:04:56,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:04:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:04:56,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:04:56,973 WARN L169 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 14:04:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:04:57,359 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:04:57,360 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 5, 5] total 14 [2018-07-24 14:04:57,360 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:04:57,361 INFO L450 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-07-24 14:04:57,361 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-07-24 14:04:57,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:04:57,362 INFO L87 Difference]: Start difference. First operand 5682 states and 8239 transitions. Second operand 12 states. [2018-07-24 14:05:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:05:24,539 INFO L93 Difference]: Finished difference Result 21937 states and 35151 transitions. [2018-07-24 14:05:24,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-07-24 14:05:24,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 258 [2018-07-24 14:05:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:05:24,623 INFO L225 Difference]: With dead ends: 21937 [2018-07-24 14:05:24,623 INFO L226 Difference]: Without dead ends: 16261 [2018-07-24 14:05:24,665 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1057 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=938, Invalid=5542, Unknown=0, NotChecked=0, Total=6480 [2018-07-24 14:05:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16261 states. [2018-07-24 14:05:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16261 to 15101. [2018-07-24 14:05:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15101 states. [2018-07-24 14:05:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15101 states to 15101 states and 21149 transitions. [2018-07-24 14:05:25,144 INFO L78 Accepts]: Start accepts. Automaton has 15101 states and 21149 transitions. Word has length 258 [2018-07-24 14:05:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:05:25,144 INFO L471 AbstractCegarLoop]: Abstraction has 15101 states and 21149 transitions. [2018-07-24 14:05:25,144 INFO L472 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-07-24 14:05:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 15101 states and 21149 transitions. [2018-07-24 14:05:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-07-24 14:05:25,160 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:05:25,161 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:05:25,161 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:05:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1355614083, now seen corresponding path program 1 times [2018-07-24 14:05:25,161 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:05:25,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:25,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:25,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:25,163 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:05:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-07-24 14:05:25,807 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:05:25,808 INFO L191 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 [2018-07-24 14:05:25,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:25,817 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:05:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:25,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:05:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-07-24 14:05:27,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:05:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-07-24 14:05:27,654 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:05:27,655 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 9 [2018-07-24 14:05:27,655 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:05:27,655 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:05:27,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:05:27,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2018-07-24 14:05:27,656 INFO L87 Difference]: Start difference. First operand 15101 states and 21149 transitions. Second operand 3 states. [2018-07-24 14:05:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:05:29,463 INFO L93 Difference]: Finished difference Result 38586 states and 57080 transitions. [2018-07-24 14:05:29,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:05:29,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 289 [2018-07-24 14:05:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:05:29,558 INFO L225 Difference]: With dead ends: 38586 [2018-07-24 14:05:29,559 INFO L226 Difference]: Without dead ends: 23871 [2018-07-24 14:05:29,602 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 576 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2018-07-24 14:05:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23871 states. [2018-07-24 14:05:30,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23871 to 23395. [2018-07-24 14:05:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23395 states. [2018-07-24 14:05:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23395 states to 23395 states and 33227 transitions. [2018-07-24 14:05:30,168 INFO L78 Accepts]: Start accepts. Automaton has 23395 states and 33227 transitions. Word has length 289 [2018-07-24 14:05:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:05:30,169 INFO L471 AbstractCegarLoop]: Abstraction has 23395 states and 33227 transitions. [2018-07-24 14:05:30,169 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:05:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 23395 states and 33227 transitions. [2018-07-24 14:05:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-07-24 14:05:30,224 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:05:30,225 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:05:30,225 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:05:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1994193760, now seen corresponding path program 1 times [2018-07-24 14:05:30,225 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:05:30,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:30,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:30,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:30,226 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:05:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-07-24 14:05:31,402 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:05:31,402 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:05:31,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:31,414 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:05:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:31,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:05:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-07-24 14:05:31,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:05:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-07-24 14:05:32,539 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:05:32,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-07-24 14:05:32,539 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:05:32,540 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:05:32,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:05:32,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:05:32,541 INFO L87 Difference]: Start difference. First operand 23395 states and 33227 transitions. Second operand 6 states. [2018-07-24 14:05:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:05:35,613 INFO L93 Difference]: Finished difference Result 46216 states and 67008 transitions. [2018-07-24 14:05:35,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:05:35,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 337 [2018-07-24 14:05:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:05:35,718 INFO L225 Difference]: With dead ends: 46216 [2018-07-24 14:05:35,718 INFO L226 Difference]: Without dead ends: 29295 [2018-07-24 14:05:35,764 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 673 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:05:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29295 states. [2018-07-24 14:05:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29295 to 28525. [2018-07-24 14:05:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28525 states. [2018-07-24 14:05:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28525 states to 28525 states and 40843 transitions. [2018-07-24 14:05:36,684 INFO L78 Accepts]: Start accepts. Automaton has 28525 states and 40843 transitions. Word has length 337 [2018-07-24 14:05:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:05:36,685 INFO L471 AbstractCegarLoop]: Abstraction has 28525 states and 40843 transitions. [2018-07-24 14:05:36,685 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:05:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 28525 states and 40843 transitions. [2018-07-24 14:05:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2018-07-24 14:05:36,798 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:05:36,799 INFO L353 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:05:36,799 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:05:36,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1258701310, now seen corresponding path program 1 times [2018-07-24 14:05:36,800 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:05:36,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:36,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:36,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:36,801 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:05:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 326 proven. 99 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 14:05:37,625 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:05:37,626 INFO L191 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 [2018-07-24 14:05:37,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:37,640 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:05:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:37,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:05:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 14:05:38,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:05:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 14:05:38,229 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:05:38,229 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:05:38,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:38,247 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:05:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:38,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:05:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 113 proven. 219 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-24 14:05:38,830 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:05:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 328 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-07-24 14:05:39,460 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:05:39,461 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-07-24 14:05:39,461 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:05:39,462 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:05:39,463 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:05:39,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:05:39,463 INFO L87 Difference]: Start difference. First operand 28525 states and 40843 transitions. Second operand 6 states. [2018-07-24 14:05:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:05:41,425 INFO L93 Difference]: Finished difference Result 55573 states and 82457 transitions. [2018-07-24 14:05:41,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:05:41,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 428 [2018-07-24 14:05:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:05:41,520 INFO L225 Difference]: With dead ends: 55573 [2018-07-24 14:05:41,520 INFO L226 Difference]: Without dead ends: 25236 [2018-07-24 14:05:41,594 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1724 GetRequests, 1704 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:05:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25236 states. [2018-07-24 14:05:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25236 to 22663. [2018-07-24 14:05:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22663 states. [2018-07-24 14:05:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22663 states to 22663 states and 29141 transitions. [2018-07-24 14:05:42,075 INFO L78 Accepts]: Start accepts. Automaton has 22663 states and 29141 transitions. Word has length 428 [2018-07-24 14:05:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:05:42,075 INFO L471 AbstractCegarLoop]: Abstraction has 22663 states and 29141 transitions. [2018-07-24 14:05:42,076 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:05:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 22663 states and 29141 transitions. [2018-07-24 14:05:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2018-07-24 14:05:42,130 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:05:42,131 INFO L353 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, 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, 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, 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] [2018-07-24 14:05:42,131 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:05:42,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1133682667, now seen corresponding path program 1 times [2018-07-24 14:05:42,132 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:05:42,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:42,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:42,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:05:42,133 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:05:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 507 proven. 263 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-07-24 14:05:43,292 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:05:43,293 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:05:43,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:43,301 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:05:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:43,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:05:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 704 proven. 2 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2018-07-24 14:05:43,846 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:05:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 107 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2018-07-24 14:05:44,312 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:05:44,312 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:05:44,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:05:44,329 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:05:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:05:44,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:05:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 704 proven. 2 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2018-07-24 14:05:46,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:05:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 107 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2018-07-24 14:05:47,126 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:05:47,126 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 5, 5] total 24 [2018-07-24 14:05:47,127 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:05:47,127 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 14:05:47,128 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 14:05:47,128 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2018-07-24 14:05:47,128 INFO L87 Difference]: Start difference. First operand 22663 states and 29141 transitions. Second operand 19 states. [2018-07-24 14:05:56,110 WARN L169 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2018-07-24 14:05:59,028 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2018-07-24 14:06:09,726 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2018-07-24 14:06:11,504 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 14:06:14,221 WARN L169 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-07-24 14:06:17,291 WARN L169 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 14:06:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:06:19,648 INFO L93 Difference]: Finished difference Result 54602 states and 76797 transitions. [2018-07-24 14:06:19,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-07-24 14:06:19,648 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 588 [2018-07-24 14:06:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:06:19,743 INFO L225 Difference]: With dead ends: 54602 [2018-07-24 14:06:19,743 INFO L226 Difference]: Without dead ends: 32325 [2018-07-24 14:06:19,784 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2582 GetRequests, 2433 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8496 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=3486, Invalid=18270, Unknown=0, NotChecked=0, Total=21756 [2018-07-24 14:06:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32325 states. [2018-07-24 14:06:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32325 to 30001. [2018-07-24 14:06:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30001 states. [2018-07-24 14:06:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30001 states to 30001 states and 36923 transitions. [2018-07-24 14:06:20,445 INFO L78 Accepts]: Start accepts. Automaton has 30001 states and 36923 transitions. Word has length 588 [2018-07-24 14:06:20,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:06:20,446 INFO L471 AbstractCegarLoop]: Abstraction has 30001 states and 36923 transitions. [2018-07-24 14:06:20,446 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 14:06:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30001 states and 36923 transitions. [2018-07-24 14:06:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2018-07-24 14:06:20,506 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:06:20,507 INFO L353 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:06:20,507 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:06:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1429869890, now seen corresponding path program 1 times [2018-07-24 14:06:20,508 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:06:20,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:06:20,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:20,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:06:20,509 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:06:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 444 proven. 207 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2018-07-24 14:06:21,017 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:06:21,017 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:06:21,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:21,026 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:06:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:21,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:06:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 881 proven. 2 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-07-24 14:06:21,489 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:06:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 474 proven. 89 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2018-07-24 14:06:22,184 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:06:22,184 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:06:22,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:22,201 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:06:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:22,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:06:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 988 proven. 2 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-07-24 14:06:22,947 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:06:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 444 proven. 207 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2018-07-24 14:06:23,304 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:06:23,305 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-07-24 14:06:23,305 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:06:23,306 INFO L450 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-07-24 14:06:23,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-07-24 14:06:23,306 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:06:23,306 INFO L87 Difference]: Start difference. First operand 30001 states and 36923 transitions. Second operand 8 states. [2018-07-24 14:06:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:06:32,624 INFO L93 Difference]: Finished difference Result 64375 states and 79435 transitions. [2018-07-24 14:06:32,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-07-24 14:06:32,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 649 [2018-07-24 14:06:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:06:32,688 INFO L225 Difference]: With dead ends: 64375 [2018-07-24 14:06:32,688 INFO L226 Difference]: Without dead ends: 34569 [2018-07-24 14:06:32,721 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2642 GetRequests, 2605 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2018-07-24 14:06:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34569 states. [2018-07-24 14:06:33,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34569 to 31298. [2018-07-24 14:06:33,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31298 states. [2018-07-24 14:06:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31298 states to 31298 states and 37549 transitions. [2018-07-24 14:06:33,226 INFO L78 Accepts]: Start accepts. Automaton has 31298 states and 37549 transitions. Word has length 649 [2018-07-24 14:06:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:06:33,227 INFO L471 AbstractCegarLoop]: Abstraction has 31298 states and 37549 transitions. [2018-07-24 14:06:33,227 INFO L472 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-07-24 14:06:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 31298 states and 37549 transitions. [2018-07-24 14:06:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2018-07-24 14:06:33,262 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:06:33,262 INFO L353 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, 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, 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, 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] [2018-07-24 14:06:33,263 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:06:33,263 INFO L82 PathProgramCache]: Analyzing trace with hash 49717103, now seen corresponding path program 1 times [2018-07-24 14:06:33,263 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:06:33,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:06:33,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:33,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:06:33,264 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:06:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 492 proven. 95 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-07-24 14:06:33,715 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:06:33,715 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:06:33,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:33,723 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:06:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:33,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:06:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 925 proven. 2 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2018-07-24 14:06:34,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:06:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 492 proven. 95 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Abandoning pump threads because process wont die! [2018-07-24 14:06:34,717 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:06:34,717 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:06:34,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:34,737 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:06:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:35,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:06:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 925 proven. 2 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2018-07-24 14:06:35,535 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:06:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 492 proven. 95 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-07-24 14:06:36,019 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:06:36,020 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-07-24 14:06:36,020 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:06:36,021 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:06:36,021 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:06:36,021 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:06:36,022 INFO L87 Difference]: Start difference. First operand 31298 states and 37549 transitions. Second operand 6 states. [2018-07-24 14:06:39,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:06:39,535 INFO L93 Difference]: Finished difference Result 70599 states and 85717 transitions. [2018-07-24 14:06:39,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:06:39,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 677 [2018-07-24 14:06:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:06:39,612 INFO L225 Difference]: With dead ends: 70599 [2018-07-24 14:06:39,613 INFO L226 Difference]: Without dead ends: 39687 [2018-07-24 14:06:39,655 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2721 GetRequests, 2707 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:06:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39687 states. [2018-07-24 14:06:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39687 to 37829. [2018-07-24 14:06:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37829 states. [2018-07-24 14:06:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37829 states to 37829 states and 45418 transitions. [2018-07-24 14:06:40,290 INFO L78 Accepts]: Start accepts. Automaton has 37829 states and 45418 transitions. Word has length 677 [2018-07-24 14:06:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:06:40,292 INFO L471 AbstractCegarLoop]: Abstraction has 37829 states and 45418 transitions. [2018-07-24 14:06:40,292 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:06:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 37829 states and 45418 transitions. [2018-07-24 14:06:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2018-07-24 14:06:40,375 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:06:40,375 INFO L353 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 14:06:40,376 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:06:40,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2003083642, now seen corresponding path program 1 times [2018-07-24 14:06:40,376 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:06:40,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:06:40,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:40,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:06:40,377 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:06:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 594 proven. 144 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-07-24 14:06:41,644 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:06:41,644 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:06:41,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:41,656 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:06:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:41,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:06:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 1076 proven. 2 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2018-07-24 14:06:42,471 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:06:42,661 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 14:06:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 594 proven. 144 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-07-24 14:06:43,098 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:06:43,098 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:06:43,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:43,118 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:06:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:43,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:06:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 1076 proven. 2 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2018-07-24 14:06:44,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:06:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 594 proven. 144 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-07-24 14:06:44,742 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:06:44,742 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-07-24 14:06:44,742 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:06:44,744 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:06:44,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:06:44,745 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 14:06:44,745 INFO L87 Difference]: Start difference. First operand 37829 states and 45418 transitions. Second operand 6 states. [2018-07-24 14:06:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:06:48,359 INFO L93 Difference]: Finished difference Result 78426 states and 95301 transitions. [2018-07-24 14:06:48,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:06:48,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 744 [2018-07-24 14:06:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:06:48,450 INFO L225 Difference]: With dead ends: 78426 [2018-07-24 14:06:48,450 INFO L226 Difference]: Without dead ends: 40983 [2018-07-24 14:06:48,509 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2989 GetRequests, 2973 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:06:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40983 states. [2018-07-24 14:06:49,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40983 to 40674. [2018-07-24 14:06:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40674 states. [2018-07-24 14:06:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40674 states to 40674 states and 47859 transitions. [2018-07-24 14:06:49,179 INFO L78 Accepts]: Start accepts. Automaton has 40674 states and 47859 transitions. Word has length 744 [2018-07-24 14:06:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:06:49,181 INFO L471 AbstractCegarLoop]: Abstraction has 40674 states and 47859 transitions. [2018-07-24 14:06:49,181 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:06:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 40674 states and 47859 transitions. [2018-07-24 14:06:49,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2018-07-24 14:06:49,268 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:06:49,269 INFO L353 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2018-07-24 14:06:49,269 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:06:49,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1101492262, now seen corresponding path program 1 times [2018-07-24 14:06:49,270 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:06:49,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:06:49,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:49,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:06:49,271 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:06:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 205 proven. 748 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2018-07-24 14:06:51,152 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:06:51,152 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:06:51,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:51,163 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:06:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:51,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:06:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 1076 proven. 2 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-07-24 14:06:51,778 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:06:51,969 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-07-24 14:06:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 396 proven. 186 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2018-07-24 14:06:53,040 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:06:53,040 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:06:53,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:06:53,062 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:06:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:06:53,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:06:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 1076 proven. 2 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-07-24 14:06:54,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:06:54,355 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-07-24 14:06:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 396 proven. 186 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2018-07-24 14:06:55,089 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:06:55,090 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 13 [2018-07-24 14:06:55,090 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:06:55,091 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 14:06:55,091 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 14:06:55,091 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:06:55,091 INFO L87 Difference]: Start difference. First operand 40674 states and 47859 transitions. Second operand 11 states. [2018-07-24 14:06:55,224 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:07:05,436 WARN L169 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-07-24 14:07:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:07:06,366 INFO L93 Difference]: Finished difference Result 85983 states and 101316 transitions. [2018-07-24 14:07:06,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-24 14:07:06,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 757 [2018-07-24 14:07:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:07:06,465 INFO L225 Difference]: With dead ends: 85983 [2018-07-24 14:07:06,465 INFO L226 Difference]: Without dead ends: 45695 [2018-07-24 14:07:06,522 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3103 GetRequests, 3053 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=388, Invalid=1964, Unknown=0, NotChecked=0, Total=2352 [2018-07-24 14:07:06,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45695 states. [2018-07-24 14:07:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45695 to 42780. [2018-07-24 14:07:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42780 states. [2018-07-24 14:07:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42780 states to 42780 states and 50083 transitions. [2018-07-24 14:07:07,275 INFO L78 Accepts]: Start accepts. Automaton has 42780 states and 50083 transitions. Word has length 757 [2018-07-24 14:07:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:07:07,276 INFO L471 AbstractCegarLoop]: Abstraction has 42780 states and 50083 transitions. [2018-07-24 14:07:07,276 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 14:07:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 42780 states and 50083 transitions. [2018-07-24 14:07:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-07-24 14:07:07,373 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:07:07,374 INFO L353 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, 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, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:07:07,374 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:07:07,375 INFO L82 PathProgramCache]: Analyzing trace with hash -385625113, now seen corresponding path program 1 times [2018-07-24 14:07:07,375 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:07:07,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:07:07,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:07:07,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:07:07,378 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:07:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:07:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 265 proven. 1202 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2018-07-24 14:07:08,587 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:07:08,587 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:07:08,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:07:08,596 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:07:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:07:08,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:07:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 1135 proven. 2 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2018-07-24 14:07:09,428 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:07:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 265 proven. 1206 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2018-07-24 14:07:10,345 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:07:10,346 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:07:10,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:07:10,361 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:07:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:07:11,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:07:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 1135 proven. 2 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2018-07-24 14:07:11,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:07:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 265 proven. 1206 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2018-07-24 14:07:12,113 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:07:12,113 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 16 [2018-07-24 14:07:12,113 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:07:12,114 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 14:07:12,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 14:07:12,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:07:12,115 INFO L87 Difference]: Start difference. First operand 42780 states and 50083 transitions. Second operand 10 states. [2018-07-24 14:07:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:07:19,748 INFO L93 Difference]: Finished difference Result 103050 states and 123820 transitions. [2018-07-24 14:07:19,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:07:19,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 807 [2018-07-24 14:07:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:07:19,974 INFO L225 Difference]: With dead ends: 103050 [2018-07-24 14:07:19,974 INFO L226 Difference]: Without dead ends: 64232 [2018-07-24 14:07:20,082 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3251 GetRequests, 3228 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2018-07-24 14:07:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64232 states. [2018-07-24 14:07:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64232 to 62858. [2018-07-24 14:07:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62858 states. [2018-07-24 14:07:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62858 states to 62858 states and 74404 transitions. [2018-07-24 14:07:21,236 INFO L78 Accepts]: Start accepts. Automaton has 62858 states and 74404 transitions. Word has length 807 [2018-07-24 14:07:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:07:21,237 INFO L471 AbstractCegarLoop]: Abstraction has 62858 states and 74404 transitions. [2018-07-24 14:07:21,237 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 14:07:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 62858 states and 74404 transitions. [2018-07-24 14:07:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2018-07-24 14:07:21,393 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:07:21,394 INFO L353 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 14:07:21,394 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:07:21,395 INFO L82 PathProgramCache]: Analyzing trace with hash 609720412, now seen corresponding path program 1 times [2018-07-24 14:07:21,395 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:07:21,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:07:21,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:07:21,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:07:21,396 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:07:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:07:22,129 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:07:23,032 WARN L169 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-07-24 14:07:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 495 proven. 815 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-07-24 14:07:23,967 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:07:23,967 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:07:23,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:07:23,974 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:07:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:07:24,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:07:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 1405 proven. 2 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2018-07-24 14:07:24,551 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:07:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 541 proven. 186 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2018-07-24 14:07:25,509 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:07:25,510 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:07:25,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:07:25,525 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:07:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:07:26,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:07:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 1405 proven. 2 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2018-07-24 14:07:26,554 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:07:26,740 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-07-24 14:07:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 541 proven. 186 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2018-07-24 14:07:27,950 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:07:27,951 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 5, 5] total 23 [2018-07-24 14:07:27,951 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:07:27,952 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 14:07:27,952 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 14:07:27,953 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2018-07-24 14:07:27,953 INFO L87 Difference]: Start difference. First operand 62858 states and 74404 transitions. Second operand 16 states. [2018-07-24 14:07:29,838 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2018-07-24 14:07:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:07:44,511 INFO L93 Difference]: Finished difference Result 134813 states and 161822 transitions. [2018-07-24 14:07:44,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-07-24 14:07:44,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 824 [2018-07-24 14:07:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:07:44,756 INFO L225 Difference]: With dead ends: 134813 [2018-07-24 14:07:44,756 INFO L226 Difference]: Without dead ends: 70161 [2018-07-24 14:07:44,921 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3444 GetRequests, 3347 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3174 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1743, Invalid=7569, Unknown=0, NotChecked=0, Total=9312 [2018-07-24 14:07:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70161 states. [2018-07-24 14:07:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70161 to 67837. [2018-07-24 14:07:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67837 states. [2018-07-24 14:07:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67837 states to 67837 states and 77547 transitions. [2018-07-24 14:07:45,959 INFO L78 Accepts]: Start accepts. Automaton has 67837 states and 77547 transitions. Word has length 824 [2018-07-24 14:07:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:07:45,960 INFO L471 AbstractCegarLoop]: Abstraction has 67837 states and 77547 transitions. [2018-07-24 14:07:45,960 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 14:07:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 67837 states and 77547 transitions. [2018-07-24 14:07:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2018-07-24 14:07:46,072 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:07:46,072 INFO L353 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, 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, 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, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:07:46,072 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:07:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1798867708, now seen corresponding path program 1 times [2018-07-24 14:07:46,073 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:07:46,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:07:46,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:07:46,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:07:46,074 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:07:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:07:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 943 proven. 668 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2018-07-24 14:07:47,846 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:07:47,847 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:07:47,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:07:47,855 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:07:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:07:48,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:07:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 2280 proven. 6 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2018-07-24 14:07:48,609 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:07:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 943 proven. 793 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-07-24 14:07:49,594 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:07:49,594 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:07:49,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:07:49,609 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:07:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:07:50,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:07:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 2280 proven. 6 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2018-07-24 14:07:50,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:07:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 943 proven. 793 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-07-24 14:07:51,715 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:07:51,716 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-07-24 14:07:51,716 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:07:51,717 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:07:51,717 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:07:51,717 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:07:51,718 INFO L87 Difference]: Start difference. First operand 67837 states and 77547 transitions. Second operand 9 states. [2018-07-24 14:07:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:07:57,951 INFO L93 Difference]: Finished difference Result 132162 states and 151006 transitions. [2018-07-24 14:07:57,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:07:57,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 980 [2018-07-24 14:07:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:07:58,101 INFO L225 Difference]: With dead ends: 132162 [2018-07-24 14:07:58,101 INFO L226 Difference]: Without dead ends: 77267 [2018-07-24 14:07:58,173 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3940 GetRequests, 3918 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:07:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77267 states. Received shutdown request... [2018-07-24 14:07:58,479 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:07:58,484 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:07:58,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:07:58 BoogieIcfgContainer [2018-07-24 14:07:58,484 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:07:58,485 INFO L168 Benchmark]: Toolchain (without parser) took 227949.51 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.3 GB in the end (delta: -1.9 GB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-07-24 14:07:58,486 INFO L168 Benchmark]: CDTParser took 0.24 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. [2018-07-24 14:07:58,487 INFO L168 Benchmark]: CACSL2BoogieTranslator took 980.93 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-07-24 14:07:58,487 INFO L168 Benchmark]: Boogie Procedure Inliner took 200.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 14:07:58,488 INFO L168 Benchmark]: Boogie Preprocessor took 395.08 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 806.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -928.5 MB). Peak memory consumption was 51.8 MB. Max. memory is 7.1 GB. [2018-07-24 14:07:58,489 INFO L168 Benchmark]: RCFGBuilder took 5516.77 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: 189.0 MB). Peak memory consumption was 189.0 MB. Max. memory is 7.1 GB. [2018-07-24 14:07:58,489 INFO L168 Benchmark]: TraceAbstraction took 220851.12 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 3.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-07-24 14:07:58,495 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 980.93 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 200.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 395.08 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 806.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -928.5 MB). Peak memory consumption was 51.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5516.77 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: 189.0 MB). Peak memory consumption was 189.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220851.12 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 2.1 GB in the beginning and 3.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 117]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 117). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 220.7s OverallTime, 18 OverallIterations, 9 TraceHistogramMax, 154.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3400 SDtfs, 31698 SDslu, 6102 SDs, 0 SdLazy, 74334 SolverSat, 12625 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 112.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29679 GetRequests, 29106 SyntacticMatches, 47 SemanticMatches, 526 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15053 ImplicationChecksByTransitivity, 31.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67837occurred in iteration=17, 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: 8.6s AutomataMinimizationTime, 18 MinimizatonAttempts, 20048 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 40.1s InterpolantComputationTime, 22745 NumberOfCodeBlocks, 22745 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 37140 ConstructedInterpolants, 4 QuantifiedInterpolants, 69087342 SizeOfPredicates, 38 NumberOfNonLiveVariables, 21811 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 66 InterpolantComputations, 9 PerfectInterpolantSequences, 60911/71686 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/Problem11_label54_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-07-58-509.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label54_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-07-58-509.csv Completed graceful shutdown