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/Problem14_label28_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:04:05,649 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:04:05,651 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:04:05,666 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:04:05,666 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:04:05,667 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:04:05,668 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:04:05,670 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:04:05,672 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:04:05,673 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:04:05,674 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:04:05,674 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:04:05,675 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:04:05,676 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:04:05,677 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:04:05,678 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:04:05,679 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:04:05,681 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:04:05,683 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:04:05,684 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:04:05,685 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:04:05,687 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:04:05,689 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:04:05,690 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:04:05,690 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:04:05,695 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:04:05,696 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:04:05,697 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:04:05,698 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:04:05,701 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:04:05,701 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:04:05,702 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:04:05,703 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:04:05,703 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:04:05,705 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:04:05,706 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:04:05,706 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 12:04:05,741 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:04:05,742 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:04:05,742 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:04:05,743 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:04:05,743 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:04:05,743 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:04:05,743 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:04:05,747 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:04:05,747 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:04:05,747 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:04:05,747 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:04:05,748 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:04:05,749 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:04:05,749 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:04:05,749 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:04:05,750 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:04:05,750 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:04:05,750 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:04:05,750 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:04:05,750 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:04:05,751 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:04:05,751 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:04:05,751 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:04:05,751 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:04:05,752 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:04:05,753 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:04:05,753 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:04:05,753 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:04:05,754 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:04:05,755 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:04:05,755 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:04:05,755 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:04:05,755 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:04:05,798 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:04:05,810 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:04:05,817 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:04:05,818 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:04:05,819 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:04:05,819 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label28_false-unreach-call_false-termination.c [2018-07-24 12:04:06,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d975f5684/7dd4705803f343d89c0a36fd99072386/FLAG29f632a27 [2018-07-24 12:04:06,444 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:04:06,445 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label28_false-unreach-call_false-termination.c [2018-07-24 12:04:06,461 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d975f5684/7dd4705803f343d89c0a36fd99072386/FLAG29f632a27 [2018-07-24 12:04:06,478 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d975f5684/7dd4705803f343d89c0a36fd99072386 [2018-07-24 12:04:06,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:04:06,492 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:04:06,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:04:06,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:04:06,501 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:04:06,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:04:06" (1/1) ... [2018-07-24 12:04:06,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75fda8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:06, skipping insertion in model container [2018-07-24 12:04:06,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:04:06" (1/1) ... [2018-07-24 12:04:06,714 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:04:07,075 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:04:07,091 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:04:07,258 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:04:07,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07 WrapperNode [2018-07-24 12:04:07,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:04:07,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:04:07,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:04:07,323 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:04:07,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (1/1) ... [2018-07-24 12:04:07,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (1/1) ... [2018-07-24 12:04:07,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:04:07,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:04:07,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:04:07,456 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:04:07,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (1/1) ... [2018-07-24 12:04:07,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (1/1) ... [2018-07-24 12:04:07,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (1/1) ... [2018-07-24 12:04:07,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (1/1) ... [2018-07-24 12:04:07,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (1/1) ... [2018-07-24 12:04:07,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (1/1) ... [2018-07-24 12:04:07,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (1/1) ... [2018-07-24 12:04:07,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:04:07,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:04:07,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:04:07,779 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:04:07,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (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 12:04:07,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:04:07,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:04:07,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:04:07,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:04:07,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:04:07,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:04:07,857 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output [2018-07-24 12:04:07,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output [2018-07-24 12:04:11,864 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:04:11,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:04:11 BoogieIcfgContainer [2018-07-24 12:04:11,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:04:11,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:04:11,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:04:11,870 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:04:11,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:04:06" (1/3) ... [2018-07-24 12:04:11,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cab6be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:04:11, skipping insertion in model container [2018-07-24 12:04:11,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:04:07" (2/3) ... [2018-07-24 12:04:11,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cab6be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:04:11, skipping insertion in model container [2018-07-24 12:04:11,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:04:11" (3/3) ... [2018-07-24 12:04:11,874 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label28_false-unreach-call_false-termination.c [2018-07-24 12:04:11,884 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:04:11,894 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:04:11,949 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:04:11,950 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:04:11,950 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:04:11,951 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:04:11,951 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:04:11,951 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:04:11,951 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:04:11,951 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:04:11,952 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:04:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-07-24 12:04:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-07-24 12:04:12,005 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:12,006 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:12,006 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:12,012 INFO L82 PathProgramCache]: Analyzing trace with hash 859074449, now seen corresponding path program 1 times [2018-07-24 12:04:12,014 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:12,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:12,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:12,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:12,063 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:12,455 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 12:04:12,458 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:04:12,458 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:04:12,458 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:04:12,464 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:04:12,476 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:04:12,476 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:04:12,479 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-07-24 12:04:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:15,916 INFO L93 Difference]: Finished difference Result 894 states and 1610 transitions. [2018-07-24 12:04:15,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:04:15,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-07-24 12:04:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:15,942 INFO L225 Difference]: With dead ends: 894 [2018-07-24 12:04:15,942 INFO L226 Difference]: Without dead ends: 633 [2018-07-24 12:04:15,952 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:04:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-07-24 12:04:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 434. [2018-07-24 12:04:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-07-24 12:04:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 662 transitions. [2018-07-24 12:04:16,044 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 662 transitions. Word has length 17 [2018-07-24 12:04:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:16,044 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 662 transitions. [2018-07-24 12:04:16,044 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:04:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 662 transitions. [2018-07-24 12:04:16,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-07-24 12:04:16,051 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:16,052 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:04:16,052 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash -292952280, now seen corresponding path program 1 times [2018-07-24 12:04:16,053 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:16,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:16,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:16,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:16,056 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:16,701 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:04:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:04:17,030 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:04:17,030 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:04:17,031 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:04:17,034 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:04:17,035 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:04:17,035 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:04:17,036 INFO L87 Difference]: Start difference. First operand 434 states and 662 transitions. Second operand 6 states. [2018-07-24 12:04:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:23,548 INFO L93 Difference]: Finished difference Result 1279 states and 2015 transitions. [2018-07-24 12:04:23,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 12:04:23,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2018-07-24 12:04:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:23,567 INFO L225 Difference]: With dead ends: 1279 [2018-07-24 12:04:23,567 INFO L226 Difference]: Without dead ends: 851 [2018-07-24 12:04:23,571 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:04:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2018-07-24 12:04:23,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 809. [2018-07-24 12:04:23,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2018-07-24 12:04:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1218 transitions. [2018-07-24 12:04:23,658 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1218 transitions. Word has length 101 [2018-07-24 12:04:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:23,659 INFO L471 AbstractCegarLoop]: Abstraction has 809 states and 1218 transitions. [2018-07-24 12:04:23,659 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:04:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1218 transitions. [2018-07-24 12:04:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-07-24 12:04:23,667 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:23,667 INFO L353 BasicCegarLoop]: trace histogram [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 12:04:23,668 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:23,668 INFO L82 PathProgramCache]: Analyzing trace with hash 524029244, now seen corresponding path program 1 times [2018-07-24 12:04:23,668 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:23,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:23,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:23,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:23,671 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:04:23,815 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:04:23,815 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:04:23,817 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:04:23,818 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:04:23,818 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:04:23,819 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:04:23,819 INFO L87 Difference]: Start difference. First operand 809 states and 1218 transitions. Second operand 3 states. [2018-07-24 12:04:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:25,679 INFO L93 Difference]: Finished difference Result 2305 states and 3567 transitions. [2018-07-24 12:04:25,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:04:25,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2018-07-24 12:04:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:25,691 INFO L225 Difference]: With dead ends: 2305 [2018-07-24 12:04:25,691 INFO L226 Difference]: Without dead ends: 1502 [2018-07-24 12:04:25,696 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:04:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2018-07-24 12:04:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1502. [2018-07-24 12:04:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1502 states. [2018-07-24 12:04:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 2074 transitions. [2018-07-24 12:04:25,742 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 2074 transitions. Word has length 127 [2018-07-24 12:04:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:25,743 INFO L471 AbstractCegarLoop]: Abstraction has 1502 states and 2074 transitions. [2018-07-24 12:04:25,743 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:04:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 2074 transitions. [2018-07-24 12:04:25,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-07-24 12:04:25,752 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:25,753 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:25,753 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1995866501, now seen corresponding path program 1 times [2018-07-24 12:04:25,755 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:25,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:25,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:25,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:25,757 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:04:26,061 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:04:26,061 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:04:26,061 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:04:26,062 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:04:26,062 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:04:26,062 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:04:26,062 INFO L87 Difference]: Start difference. First operand 1502 states and 2074 transitions. Second operand 6 states. [2018-07-24 12:04:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:28,019 INFO L93 Difference]: Finished difference Result 3615 states and 5215 transitions. [2018-07-24 12:04:28,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:04:28,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2018-07-24 12:04:28,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:28,034 INFO L225 Difference]: With dead ends: 3615 [2018-07-24 12:04:28,034 INFO L226 Difference]: Without dead ends: 2119 [2018-07-24 12:04:28,040 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:04:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2018-07-24 12:04:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 2077. [2018-07-24 12:04:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2018-07-24 12:04:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 2799 transitions. [2018-07-24 12:04:28,105 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 2799 transitions. Word has length 158 [2018-07-24 12:04:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:28,105 INFO L471 AbstractCegarLoop]: Abstraction has 2077 states and 2799 transitions. [2018-07-24 12:04:28,106 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:04:28,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 2799 transitions. [2018-07-24 12:04:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-07-24 12:04:28,110 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:28,110 INFO L353 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:04:28,110 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:28,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1662674586, now seen corresponding path program 1 times [2018-07-24 12:04:28,111 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:28,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:28,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:28,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:28,112 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-07-24 12:04:28,408 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:04:28,408 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:04:28,408 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:04:28,409 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:04:28,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:04:28,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:04:28,410 INFO L87 Difference]: Start difference. First operand 2077 states and 2799 transitions. Second operand 4 states. [2018-07-24 12:04:30,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:30,411 INFO L93 Difference]: Finished difference Result 6073 states and 8302 transitions. [2018-07-24 12:04:30,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:04:30,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2018-07-24 12:04:30,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:30,432 INFO L225 Difference]: With dead ends: 6073 [2018-07-24 12:04:30,432 INFO L226 Difference]: Without dead ends: 4002 [2018-07-24 12:04:30,448 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 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 12:04:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2018-07-24 12:04:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 4002. [2018-07-24 12:04:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4002 states. [2018-07-24 12:04:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5173 transitions. [2018-07-24 12:04:30,545 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5173 transitions. Word has length 236 [2018-07-24 12:04:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:30,546 INFO L471 AbstractCegarLoop]: Abstraction has 4002 states and 5173 transitions. [2018-07-24 12:04:30,546 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:04:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5173 transitions. [2018-07-24 12:04:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-07-24 12:04:30,551 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:30,551 INFO L353 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:30,552 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:30,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1661247035, now seen corresponding path program 1 times [2018-07-24 12:04:30,552 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:30,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:30,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:30,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:30,553 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 107 proven. 150 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:04:31,231 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:31,231 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 12:04:31,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:31,240 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:31,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-24 12:04:32,371 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:32,663 WARN L169 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-07-24 12:04:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 40 proven. 217 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:04:33,432 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:33,432 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:04:33,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:33,461 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:33,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-07-24 12:04:34,385 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 40 proven. 217 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:04:35,159 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:35,159 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9, 8, 8] total 34 [2018-07-24 12:04:35,160 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:35,161 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 12:04:35,161 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 12:04:35,162 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 12:04:35,163 INFO L87 Difference]: Start difference. First operand 4002 states and 5173 transitions. Second operand 19 states. [2018-07-24 12:04:36,657 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2018-07-24 12:04:41,823 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2018-07-24 12:04:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:48,706 INFO L93 Difference]: Finished difference Result 10109 states and 13054 transitions. [2018-07-24 12:04:48,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-24 12:04:48,707 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 260 [2018-07-24 12:04:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:48,733 INFO L225 Difference]: With dead ends: 10109 [2018-07-24 12:04:48,733 INFO L226 Difference]: Without dead ends: 5906 [2018-07-24 12:04:48,757 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1102 GetRequests, 1040 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=784, Invalid=2876, Unknown=0, NotChecked=0, Total=3660 [2018-07-24 12:04:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2018-07-24 12:04:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5618. [2018-07-24 12:04:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5618 states. [2018-07-24 12:04:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 6635 transitions. [2018-07-24 12:04:48,879 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 6635 transitions. Word has length 260 [2018-07-24 12:04:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:48,880 INFO L471 AbstractCegarLoop]: Abstraction has 5618 states and 6635 transitions. [2018-07-24 12:04:48,880 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 12:04:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 6635 transitions. [2018-07-24 12:04:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-07-24 12:04:48,889 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:48,889 INFO L353 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:48,890 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:48,890 INFO L82 PathProgramCache]: Analyzing trace with hash 170677833, now seen corresponding path program 1 times [2018-07-24 12:04:48,890 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:48,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:48,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:48,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:48,891 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 329 proven. 160 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-07-24 12:04:49,971 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:49,971 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 12:04:49,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:49,979 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:50,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-07-24 12:04:50,371 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:50,482 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 12:04:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-07-24 12:04:50,974 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:50,975 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 12:04:50,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:50,992 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:51,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 142 proven. 156 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-07-24 12:04:51,623 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 61 proven. 237 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-07-24 12:04:52,777 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:52,777 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-07-24 12:04:52,777 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:52,780 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:04:52,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:04:52,780 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:04:52,780 INFO L87 Difference]: Start difference. First operand 5618 states and 6635 transitions. Second operand 13 states. [2018-07-24 12:04:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:56,975 INFO L93 Difference]: Finished difference Result 11288 states and 13674 transitions. [2018-07-24 12:04:56,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 12:04:56,975 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 407 [2018-07-24 12:04:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:56,998 INFO L225 Difference]: With dead ends: 11288 [2018-07-24 12:04:56,998 INFO L226 Difference]: Without dead ends: 5660 [2018-07-24 12:04:57,018 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1658 GetRequests, 1617 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-07-24 12:04:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5660 states. [2018-07-24 12:04:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5660 to 5472. [2018-07-24 12:04:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5472 states. [2018-07-24 12:04:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5472 states to 5472 states and 6232 transitions. [2018-07-24 12:04:57,148 INFO L78 Accepts]: Start accepts. Automaton has 5472 states and 6232 transitions. Word has length 407 [2018-07-24 12:04:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:57,149 INFO L471 AbstractCegarLoop]: Abstraction has 5472 states and 6232 transitions. [2018-07-24 12:04:57,149 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:04:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 5472 states and 6232 transitions. [2018-07-24 12:04:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-07-24 12:04:57,159 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:57,159 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:04:57,159 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:57,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1334028236, now seen corresponding path program 1 times [2018-07-24 12:04:57,160 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:57,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:57,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:57,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:57,161 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 159 proven. 298 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-07-24 12:04:58,330 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:58,330 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 12:04:58,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:58,339 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:58,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 443 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-07-24 12:04:58,827 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 51 proven. 406 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-07-24 12:04:59,598 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:59,598 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:04:59,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:59,661 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:59,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:00,284 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:05:01,008 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:05:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 420 proven. 25 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-07-24 12:05:01,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:02,305 WARN L169 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-07-24 12:05:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 53 proven. 404 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-07-24 12:05:03,748 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:03,749 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8, 10, 11] total 39 [2018-07-24 12:05:03,749 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:03,750 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 12:05:03,750 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 12:05:03,751 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2018-07-24 12:05:03,751 INFO L87 Difference]: Start difference. First operand 5472 states and 6232 transitions. Second operand 18 states. [2018-07-24 12:05:06,468 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-07-24 12:05:11,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:11,062 INFO L93 Difference]: Finished difference Result 11152 states and 12731 transitions. [2018-07-24 12:05:11,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-24 12:05:11,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 420 [2018-07-24 12:05:11,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:11,085 INFO L225 Difference]: With dead ends: 11152 [2018-07-24 12:05:11,085 INFO L226 Difference]: Without dead ends: 5869 [2018-07-24 12:05:11,100 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1731 GetRequests, 1672 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=660, Invalid=2762, Unknown=0, NotChecked=0, Total=3422 [2018-07-24 12:05:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5869 states. [2018-07-24 12:05:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5869 to 5763. [2018-07-24 12:05:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5763 states. [2018-07-24 12:05:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5763 states to 5763 states and 6547 transitions. [2018-07-24 12:05:11,235 INFO L78 Accepts]: Start accepts. Automaton has 5763 states and 6547 transitions. Word has length 420 [2018-07-24 12:05:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:11,236 INFO L471 AbstractCegarLoop]: Abstraction has 5763 states and 6547 transitions. [2018-07-24 12:05:11,236 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-24 12:05:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5763 states and 6547 transitions. [2018-07-24 12:05:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-07-24 12:05:11,250 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:11,251 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:05:11,251 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:11,251 INFO L82 PathProgramCache]: Analyzing trace with hash 181993280, now seen corresponding path program 1 times [2018-07-24 12:05:11,252 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:11,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:11,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:11,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:11,253 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 446 proven. 229 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-07-24 12:05:12,874 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:12,874 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 12:05:12,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:12,884 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:13,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 591 proven. 2 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-07-24 12:05:13,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 291 proven. 73 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2018-07-24 12:05:14,114 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:14,114 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 12:05:14,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:14,130 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:14,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 377 proven. 8 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-07-24 12:05:15,129 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:15,284 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-07-24 12:05:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 54 proven. 331 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2018-07-24 12:05:16,201 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:16,201 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-07-24 12:05:16,202 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:16,203 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 12:05:16,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 12:05:16,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2018-07-24 12:05:16,204 INFO L87 Difference]: Start difference. First operand 5763 states and 6547 transitions. Second operand 17 states. [2018-07-24 12:05:17,803 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2018-07-24 12:05:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:24,079 INFO L93 Difference]: Finished difference Result 11959 states and 14143 transitions. [2018-07-24 12:05:24,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 12:05:24,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 507 [2018-07-24 12:05:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:24,101 INFO L225 Difference]: With dead ends: 11959 [2018-07-24 12:05:24,101 INFO L226 Difference]: Without dead ends: 5745 [2018-07-24 12:05:24,122 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2104 GetRequests, 2032 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=857, Invalid=3565, Unknown=0, NotChecked=0, Total=4422 [2018-07-24 12:05:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2018-07-24 12:05:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 5603. [2018-07-24 12:05:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5603 states. [2018-07-24 12:05:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 6239 transitions. [2018-07-24 12:05:24,234 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 6239 transitions. Word has length 507 [2018-07-24 12:05:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:24,235 INFO L471 AbstractCegarLoop]: Abstraction has 5603 states and 6239 transitions. [2018-07-24 12:05:24,235 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 12:05:24,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 6239 transitions. [2018-07-24 12:05:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2018-07-24 12:05:24,254 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:24,254 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-07-24 12:05:24,254 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:24,255 INFO L82 PathProgramCache]: Analyzing trace with hash -436106708, now seen corresponding path program 1 times [2018-07-24 12:05:24,255 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:24,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:24,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:24,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:24,256 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 408 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-07-24 12:05:25,140 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:25,140 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 12:05:25,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:25,149 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:25,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 682 proven. 2 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-07-24 12:05:25,563 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 408 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-07-24 12:05:25,906 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:25,906 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 12:05:25,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:25,922 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:26,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2018-07-24 12:05:26,580 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2018-07-24 12:05:26,757 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-07-24 12:05:26,758 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 5, 5] total 11 [2018-07-24 12:05:26,758 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:05:26,759 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:05:26,760 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:05:26,760 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:05:26,760 INFO L87 Difference]: Start difference. First operand 5603 states and 6239 transitions. Second operand 3 states. [2018-07-24 12:05:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:27,592 INFO L93 Difference]: Finished difference Result 13174 states and 15059 transitions. [2018-07-24 12:05:27,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:05:27,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 611 [2018-07-24 12:05:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:27,610 INFO L225 Difference]: With dead ends: 13174 [2018-07-24 12:05:27,610 INFO L226 Difference]: Without dead ends: 6195 [2018-07-24 12:05:27,625 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2448 GetRequests, 2438 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:05:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6195 states. [2018-07-24 12:05:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6195 to 6195. [2018-07-24 12:05:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6195 states. [2018-07-24 12:05:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6195 states to 6195 states and 6920 transitions. [2018-07-24 12:05:27,726 INFO L78 Accepts]: Start accepts. Automaton has 6195 states and 6920 transitions. Word has length 611 [2018-07-24 12:05:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:27,727 INFO L471 AbstractCegarLoop]: Abstraction has 6195 states and 6920 transitions. [2018-07-24 12:05:27,727 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:05:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6195 states and 6920 transitions. [2018-07-24 12:05:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2018-07-24 12:05:27,744 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:27,745 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-07-24 12:05:27,745 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:27,745 INFO L82 PathProgramCache]: Analyzing trace with hash -869510696, now seen corresponding path program 1 times [2018-07-24 12:05:27,745 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:27,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:27,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:27,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:27,747 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 408 proven. 80 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2018-07-24 12:05:28,594 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:28,594 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 12:05:28,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:28,602 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:28,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 706 proven. 2 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-07-24 12:05:29,059 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 408 proven. 80 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2018-07-24 12:05:29,379 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:29,379 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 12:05:29,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:29,395 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:29,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2018-07-24 12:05:30,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2018-07-24 12:05:30,369 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 3 imperfect interpolant sequences. [2018-07-24 12:05:30,370 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 5, 5] total 11 [2018-07-24 12:05:30,370 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:05:30,370 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:05:30,371 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:05:30,371 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:05:30,371 INFO L87 Difference]: Start difference. First operand 6195 states and 6920 transitions. Second operand 3 states. [2018-07-24 12:05:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:31,187 INFO L93 Difference]: Finished difference Result 13595 states and 15604 transitions. [2018-07-24 12:05:31,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:05:31,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 617 [2018-07-24 12:05:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:31,205 INFO L225 Difference]: With dead ends: 13595 [2018-07-24 12:05:31,205 INFO L226 Difference]: Without dead ends: 7589 [2018-07-24 12:05:31,219 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2472 GetRequests, 2462 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:05:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7589 states. [2018-07-24 12:05:31,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7589 to 7526. [2018-07-24 12:05:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7526 states. [2018-07-24 12:05:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7526 states to 7526 states and 8385 transitions. [2018-07-24 12:05:31,343 INFO L78 Accepts]: Start accepts. Automaton has 7526 states and 8385 transitions. Word has length 617 [2018-07-24 12:05:31,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:31,345 INFO L471 AbstractCegarLoop]: Abstraction has 7526 states and 8385 transitions. [2018-07-24 12:05:31,345 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:05:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 7526 states and 8385 transitions. [2018-07-24 12:05:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2018-07-24 12:05:31,353 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:31,354 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-07-24 12:05:31,354 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:31,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1310710413, now seen corresponding path program 1 times [2018-07-24 12:05:31,354 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:31,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:31,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:31,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:31,356 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 408 proven. 83 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2018-07-24 12:05:32,023 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:32,023 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 12:05:32,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:32,031 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:32,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-07-24 12:05:32,427 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 408 proven. 83 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2018-07-24 12:05:32,759 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:32,759 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 12:05:32,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:32,775 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:33,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 718 proven. 2 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-07-24 12:05:33,419 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 408 proven. 83 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2018-07-24 12:05:33,792 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:33,792 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 12:05:33,792 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:33,793 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:05:33,794 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:05:33,794 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:05:33,794 INFO L87 Difference]: Start difference. First operand 7526 states and 8385 transitions. Second operand 7 states. [2018-07-24 12:05:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:36,549 INFO L93 Difference]: Finished difference Result 21013 states and 26275 transitions. [2018-07-24 12:05:36,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 12:05:36,550 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 620 [2018-07-24 12:05:36,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:36,617 INFO L225 Difference]: With dead ends: 21013 [2018-07-24 12:05:36,617 INFO L226 Difference]: Without dead ends: 13861 [2018-07-24 12:05:36,658 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2494 GetRequests, 2480 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:05:36,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13861 states. [2018-07-24 12:05:36,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13861 to 13460. [2018-07-24 12:05:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13460 states. [2018-07-24 12:05:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13460 states to 13460 states and 15328 transitions. [2018-07-24 12:05:36,979 INFO L78 Accepts]: Start accepts. Automaton has 13460 states and 15328 transitions. Word has length 620 [2018-07-24 12:05:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:36,981 INFO L471 AbstractCegarLoop]: Abstraction has 13460 states and 15328 transitions. [2018-07-24 12:05:36,981 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:05:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 13460 states and 15328 transitions. [2018-07-24 12:05:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2018-07-24 12:05:36,996 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:36,996 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:05:36,997 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:36,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2145223394, now seen corresponding path program 1 times [2018-07-24 12:05:36,997 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:36,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:36,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:36,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:36,999 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:38,224 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:05:38,551 WARN L169 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-07-24 12:05:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 602 proven. 713 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-07-24 12:05:40,386 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:40,386 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 12:05:40,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:40,399 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:40,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 975 proven. 2 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-07-24 12:05:41,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 586 proven. 83 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2018-07-24 12:05:41,590 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:41,590 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 12:05:41,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:41,607 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:42,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 975 proven. 2 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-07-24 12:05:42,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 586 proven. 83 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2018-07-24 12:05:42,967 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:42,967 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5, 5, 5] total 23 [2018-07-24 12:05:42,967 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:42,969 INFO L450 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-07-24 12:05:42,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-07-24 12:05:42,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:05:42,970 INFO L87 Difference]: Start difference. First operand 13460 states and 15328 transitions. Second operand 21 states. [2018-07-24 12:05:55,487 WARN L169 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2018-07-24 12:05:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:57,912 INFO L93 Difference]: Finished difference Result 30599 states and 36124 transitions. [2018-07-24 12:05:57,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-07-24 12:05:57,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 780 [2018-07-24 12:05:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:57,952 INFO L225 Difference]: With dead ends: 30599 [2018-07-24 12:05:57,953 INFO L226 Difference]: Without dead ends: 17513 [2018-07-24 12:05:58,005 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3280 GetRequests, 3180 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3106 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1382, Invalid=8124, Unknown=0, NotChecked=0, Total=9506 [2018-07-24 12:05:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17513 states. [2018-07-24 12:05:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17513 to 17215. [2018-07-24 12:05:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17215 states. [2018-07-24 12:05:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17215 states to 17215 states and 19211 transitions. [2018-07-24 12:05:58,302 INFO L78 Accepts]: Start accepts. Automaton has 17215 states and 19211 transitions. Word has length 780 [2018-07-24 12:05:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:58,303 INFO L471 AbstractCegarLoop]: Abstraction has 17215 states and 19211 transitions. [2018-07-24 12:05:58,304 INFO L472 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-07-24 12:05:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 17215 states and 19211 transitions. [2018-07-24 12:05:58,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2018-07-24 12:05:58,334 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:58,335 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 7, 7, 7, 7, 7, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:05:58,335 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:58,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1404671641, now seen corresponding path program 1 times [2018-07-24 12:05:58,336 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:58,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:58,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:58,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:58,337 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3328 backedges. 896 proven. 537 refuted. 0 times theorem prover too weak. 1895 trivial. 0 not checked. [2018-07-24 12:06:00,373 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:00,373 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 12:06:00,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:00,383 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:00,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3328 backedges. 1274 proven. 2 refuted. 0 times theorem prover too weak. 2052 trivial. 0 not checked. [2018-07-24 12:06:01,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3328 backedges. 666 proven. 74 refuted. 0 times theorem prover too weak. 2588 trivial. 0 not checked. [2018-07-24 12:06:02,029 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:02,030 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 12:06:02,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:02,046 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:02,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:03,032 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2018-07-24 12:06:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3328 backedges. 1939 proven. 10 refuted. 0 times theorem prover too weak. 1379 trivial. 0 not checked. [2018-07-24 12:06:05,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:05,174 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-07-24 12:06:05,505 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-07-24 12:06:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3328 backedges. 191 proven. 1764 refuted. 0 times theorem prover too weak. 1373 trivial. 0 not checked. [2018-07-24 12:06:08,886 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:06:08,887 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 13, 14] total 39 [2018-07-24 12:06:08,887 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:06:08,889 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 12:06:08,889 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 12:06:08,890 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2018-07-24 12:06:08,890 INFO L87 Difference]: Start difference. First operand 17215 states and 19211 transitions. Second operand 17 states. [2018-07-24 12:06:14,137 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2018-07-24 12:06:16,654 WARN L169 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-07-24 12:06:19,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:06:19,543 INFO L93 Difference]: Finished difference Result 33131 states and 38008 transitions. [2018-07-24 12:06:19,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-07-24 12:06:19,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1032 [2018-07-24 12:06:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:06:19,595 INFO L225 Difference]: With dead ends: 33131 [2018-07-24 12:06:19,595 INFO L226 Difference]: Without dead ends: 15615 [2018-07-24 12:06:19,645 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4216 GetRequests, 4120 SyntacticMatches, 19 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=876, Invalid=5286, Unknown=0, NotChecked=0, Total=6162 [2018-07-24 12:06:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15615 states. [2018-07-24 12:06:19,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15615 to 15161. [2018-07-24 12:06:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15161 states. [2018-07-24 12:06:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 16585 transitions. [2018-07-24 12:06:19,921 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 16585 transitions. Word has length 1032 [2018-07-24 12:06:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:06:19,922 INFO L471 AbstractCegarLoop]: Abstraction has 15161 states and 16585 transitions. [2018-07-24 12:06:19,922 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 12:06:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 16585 transitions. [2018-07-24 12:06:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1045 [2018-07-24 12:06:19,945 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:06:19,946 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 7, 7, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:06:19,946 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:06:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash -521593153, now seen corresponding path program 1 times [2018-07-24 12:06:19,946 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:06:19,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:19,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:19,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:19,948 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:06:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 908 proven. 546 refuted. 0 times theorem prover too weak. 1952 trivial. 0 not checked. [2018-07-24 12:06:22,014 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:22,015 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 12:06:22,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:22,023 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:22,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 772 proven. 2 refuted. 0 times theorem prover too weak. 2632 trivial. 0 not checked. [2018-07-24 12:06:22,825 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 772 proven. 2 refuted. 0 times theorem prover too weak. 2632 trivial. 0 not checked. [2018-07-24 12:06:23,561 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:23,561 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 12:06:23,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:23,576 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:24,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 1941 proven. 6 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2018-07-24 12:06:25,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 1324 proven. 246 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2018-07-24 12:06:26,141 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:06:26,142 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 7, 8] total 29 [2018-07-24 12:06:26,142 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:06:26,143 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 12:06:26,143 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 12:06:26,143 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2018-07-24 12:06:26,144 INFO L87 Difference]: Start difference. First operand 15161 states and 16585 transitions. Second operand 17 states. [2018-07-24 12:06:29,056 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2018-07-24 12:06:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:06:34,663 INFO L93 Difference]: Finished difference Result 36302 states and 41684 transitions. [2018-07-24 12:06:34,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-24 12:06:34,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1044 [2018-07-24 12:06:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:06:34,710 INFO L225 Difference]: With dead ends: 36302 [2018-07-24 12:06:34,710 INFO L226 Difference]: Without dead ends: 14564 [2018-07-24 12:06:34,797 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4256 GetRequests, 4188 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=826, Invalid=3866, Unknown=0, NotChecked=0, Total=4692 [2018-07-24 12:06:34,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2018-07-24 12:06:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 13397. [2018-07-24 12:06:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13397 states. [2018-07-24 12:06:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13397 states to 13397 states and 14337 transitions. [2018-07-24 12:06:35,055 INFO L78 Accepts]: Start accepts. Automaton has 13397 states and 14337 transitions. Word has length 1044 [2018-07-24 12:06:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:06:35,056 INFO L471 AbstractCegarLoop]: Abstraction has 13397 states and 14337 transitions. [2018-07-24 12:06:35,057 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 12:06:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 13397 states and 14337 transitions. [2018-07-24 12:06:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1063 [2018-07-24 12:06:35,084 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:06:35,085 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 7, 7, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:06:35,085 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:06:35,086 INFO L82 PathProgramCache]: Analyzing trace with hash -232684861, now seen corresponding path program 1 times [2018-07-24 12:06:35,086 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:06:35,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:35,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:35,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:35,087 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:06:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3496 backedges. 926 proven. 546 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2018-07-24 12:06:37,051 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:37,051 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 12:06:37,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:37,064 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:37,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3496 backedges. 772 proven. 2 refuted. 0 times theorem prover too weak. 2722 trivial. 0 not checked. [2018-07-24 12:06:37,785 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:38,703 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:06:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3496 backedges. 772 proven. 2 refuted. 0 times theorem prover too weak. 2722 trivial. 0 not checked. [2018-07-24 12:06:39,752 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:39,752 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 12:06:39,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:39,767 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:40,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3496 backedges. 2013 proven. 6 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2018-07-24 12:06:41,206 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3496 backedges. 1396 proven. 264 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2018-07-24 12:06:42,949 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:06:42,951 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 7, 8] total 31 [2018-07-24 12:06:42,952 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:06:42,953 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 12:06:42,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 12:06:42,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2018-07-24 12:06:42,954 INFO L87 Difference]: Start difference. First operand 13397 states and 14337 transitions. Second operand 18 states. [2018-07-24 12:06:54,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:06:54,254 INFO L93 Difference]: Finished difference Result 27330 states and 30031 transitions. [2018-07-24 12:06:54,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-07-24 12:06:54,254 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1062 [2018-07-24 12:06:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:06:54,284 INFO L225 Difference]: With dead ends: 27330 [2018-07-24 12:06:54,285 INFO L226 Difference]: Without dead ends: 13732 [2018-07-24 12:06:54,311 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4330 GetRequests, 4265 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=749, Invalid=3673, Unknown=0, NotChecked=0, Total=4422 [2018-07-24 12:06:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2018-07-24 12:06:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 12817. [2018-07-24 12:06:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12817 states. [2018-07-24 12:06:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12817 states to 12817 states and 13527 transitions. [2018-07-24 12:06:54,552 INFO L78 Accepts]: Start accepts. Automaton has 12817 states and 13527 transitions. Word has length 1062 [2018-07-24 12:06:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:06:54,553 INFO L471 AbstractCegarLoop]: Abstraction has 12817 states and 13527 transitions. [2018-07-24 12:06:54,553 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-24 12:06:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 12817 states and 13527 transitions. [2018-07-24 12:06:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2018-07-24 12:06:54,578 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:06:54,578 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:06:54,579 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:06:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash -260690689, now seen corresponding path program 1 times [2018-07-24 12:06:54,579 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:06:54,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:54,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:54,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:54,580 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:06:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3548 backedges. 789 proven. 701 refuted. 0 times theorem prover too weak. 2058 trivial. 0 not checked. [2018-07-24 12:06:56,672 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:56,672 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 12:06:56,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:56,679 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:57,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3548 backedges. 772 proven. 2 refuted. 0 times theorem prover too weak. 2774 trivial. 0 not checked. [2018-07-24 12:06:57,586 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3548 backedges. 772 proven. 2 refuted. 0 times theorem prover too weak. 2774 trivial. 0 not checked. [2018-07-24 12:06:58,748 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:58,749 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 12:06:58,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:58,764 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:59,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:07:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3548 backedges. 1887 proven. 22 refuted. 0 times theorem prover too weak. 1639 trivial. 0 not checked. [2018-07-24 12:07:01,088 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:07:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3548 backedges. 207 proven. 1968 refuted. 0 times theorem prover too weak. 1373 trivial. 0 not checked. [2018-07-24 12:07:06,577 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:07:06,578 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 10, 12] total 36 [2018-07-24 12:07:06,578 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:07:06,580 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 12:07:06,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 12:07:06,581 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2018-07-24 12:07:06,581 INFO L87 Difference]: Start difference. First operand 12817 states and 13527 transitions. Second operand 17 states. [2018-07-24 12:07:15,045 WARN L169 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2018-07-24 12:07:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:07:16,826 INFO L93 Difference]: Finished difference Result 25862 states and 27299 transitions. [2018-07-24 12:07:16,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 12:07:16,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1076 [2018-07-24 12:07:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:07:16,851 INFO L225 Difference]: With dead ends: 25862 [2018-07-24 12:07:16,851 INFO L226 Difference]: Without dead ends: 13419 [2018-07-24 12:07:16,869 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4379 GetRequests, 4306 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=870, Invalid=4386, Unknown=0, NotChecked=0, Total=5256 [2018-07-24 12:07:16,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13419 states. [2018-07-24 12:07:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13419 to 12765. [2018-07-24 12:07:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12765 states. [2018-07-24 12:07:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12765 states to 12765 states and 13399 transitions. [2018-07-24 12:07:17,084 INFO L78 Accepts]: Start accepts. Automaton has 12765 states and 13399 transitions. Word has length 1076 [2018-07-24 12:07:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:07:17,085 INFO L471 AbstractCegarLoop]: Abstraction has 12765 states and 13399 transitions. [2018-07-24 12:07:17,085 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 12:07:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 12765 states and 13399 transitions. [2018-07-24 12:07:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1086 [2018-07-24 12:07:17,104 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:07:17,105 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:07:17,105 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:07:17,106 INFO L82 PathProgramCache]: Analyzing trace with hash -805258882, now seen corresponding path program 1 times [2018-07-24 12:07:17,106 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:07:17,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:07:17,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:17,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:07:17,107 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:07:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:18,499 WARN L169 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-07-24 12:07:18,770 WARN L169 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-07-24 12:07:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3566 backedges. 914 proven. 1692 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2018-07-24 12:07:21,427 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:07:21,427 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:07:21,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:21,437 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:07:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:21,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:07:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3566 backedges. 772 proven. 2 refuted. 0 times theorem prover too weak. 2792 trivial. 0 not checked. [2018-07-24 12:07:22,259 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:07:22,417 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 12:07:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3566 backedges. 772 proven. 2 refuted. 0 times theorem prover too weak. 2792 trivial. 0 not checked. [2018-07-24 12:07:23,579 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:07:23,580 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 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:07:23,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:23,596 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:07:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:24,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:07:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3566 backedges. 2060 proven. 6 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2018-07-24 12:07:25,153 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:07:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3566 backedges. 1443 proven. 287 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (27)] Exception during sending of exit command (exit): Broken pipe [2018-07-24 12:07:27,035 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:07:27,036 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 5, 5, 7, 8] total 39 [2018-07-24 12:07:27,036 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:07:27,040 INFO L450 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-07-24 12:07:27,041 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-07-24 12:07:27,041 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2018-07-24 12:07:27,041 INFO L87 Difference]: Start difference. First operand 12765 states and 13399 transitions. Second operand 27 states. [2018-07-24 12:07:27,642 WARN L169 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-07-24 12:07:31,155 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2018-07-24 12:07:32,129 WARN L169 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-07-24 12:07:35,609 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2018-07-24 12:07:37,903 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2018-07-24 12:07:39,331 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2018-07-24 12:07:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:07:47,917 INFO L93 Difference]: Finished difference Result 26190 states and 28299 transitions. [2018-07-24 12:07:47,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-07-24 12:07:47,917 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 1085 [2018-07-24 12:07:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:07:47,963 INFO L225 Difference]: With dead ends: 26190 [2018-07-24 12:07:47,963 INFO L226 Difference]: Without dead ends: 13616 [2018-07-24 12:07:47,996 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4477 GetRequests, 4370 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1662, Invalid=9680, Unknown=0, NotChecked=0, Total=11342 [2018-07-24 12:07:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13616 states. [2018-07-24 12:07:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13616 to 12649. [2018-07-24 12:07:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12649 states. [2018-07-24 12:07:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12649 states to 12649 states and 13240 transitions. [2018-07-24 12:07:48,407 INFO L78 Accepts]: Start accepts. Automaton has 12649 states and 13240 transitions. Word has length 1085 [2018-07-24 12:07:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:07:48,408 INFO L471 AbstractCegarLoop]: Abstraction has 12649 states and 13240 transitions. [2018-07-24 12:07:48,408 INFO L472 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-07-24 12:07:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 12649 states and 13240 transitions. [2018-07-24 12:07:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1088 [2018-07-24 12:07:48,425 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:07:48,425 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:07:48,426 INFO L414 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:07:48,426 INFO L82 PathProgramCache]: Analyzing trace with hash -340256990, now seen corresponding path program 1 times [2018-07-24 12:07:48,426 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:07:48,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:07:48,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:48,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:07:48,427 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:07:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:49,373 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:07:49,843 WARN L169 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:07:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 932 proven. 546 refuted. 0 times theorem prover too weak. 2092 trivial. 0 not checked. [2018-07-24 12:07:51,336 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:07:51,336 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:07:51,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:51,344 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:07:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:51,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:07:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 772 proven. 2 refuted. 0 times theorem prover too weak. 2796 trivial. 0 not checked. [2018-07-24 12:07:52,273 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:07:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 772 proven. 2 refuted. 0 times theorem prover too weak. 2796 trivial. 0 not checked. [2018-07-24 12:07:53,912 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:07:53,912 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 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:07:53,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:07:53,931 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:07:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:07:54,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:07:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2062 proven. 6 refuted. 0 times theorem prover too weak. 1502 trivial. 0 not checked. [2018-07-24 12:07:55,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:07:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 1445 proven. 289 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2018-07-24 12:07:56,376 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:07:56,377 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 7, 8] total 30 [2018-07-24 12:07:56,377 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:07:56,379 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 12:07:56,379 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 12:07:56,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2018-07-24 12:07:56,380 INFO L87 Difference]: Start difference. First operand 12649 states and 13240 transitions. Second operand 18 states. Received shutdown request... [2018-07-24 12:07:56,607 WARN L177 SmtUtils]: Removed 9 from assertion stack [2018-07-24 12:07:56,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-07-24 12:07:56,608 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:07:56,612 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:07:56,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:07:56 BoogieIcfgContainer [2018-07-24 12:07:56,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:07:56,614 INFO L168 Benchmark]: Toolchain (without parser) took 230122.50 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-07-24 12:07:56,614 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:07:56,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 828.46 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: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:56,615 INFO L168 Benchmark]: Boogie Procedure Inliner took 133.33 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:56,616 INFO L168 Benchmark]: Boogie Preprocessor took 322.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 774.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -875.3 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:56,617 INFO L168 Benchmark]: RCFGBuilder took 4086.64 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: 140.5 MB). Peak memory consumption was 140.5 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:56,617 INFO L168 Benchmark]: TraceAbstraction took 224746.83 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.9 GB in the end (delta: -854.3 MB). Peak memory consumption was 991.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:07:56,622 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 828.46 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: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 133.33 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 322.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 774.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -875.3 MB). Peak memory consumption was 33.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4086.64 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: 140.5 MB). Peak memory consumption was 140.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224746.83 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.9 GB in the end (delta: -854.3 MB). Peak memory consumption was 991.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 34). Cancelled while BasicCegarLoop was constructing difference of abstraction (12649states) and interpolant automaton (currently 5 states, 18 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 36. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 224.6s OverallTime, 19 OverallIterations, 10 TraceHistogramMax, 130.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2584 SDtfs, 59406 SDslu, 5516 SDs, 0 SdLazy, 70298 SolverSat, 8615 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 84.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43363 GetRequests, 42528 SyntacticMatches, 67 SemanticMatches, 767 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15677 ImplicationChecksByTransitivity, 49.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17215occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 5926 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 10.7s SatisfiabilityAnalysisTime, 65.5s InterpolantComputationTime, 32463 NumberOfCodeBlocks, 32463 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 53604 ConstructedInterpolants, 77 QuantifiedInterpolants, 180262305 SizeOfPredicates, 88 NumberOfNonLiveVariables, 31094 ConjunctsInSsa, 458 ConjunctsInUnsatCore, 75 InterpolantComputations, 9 PerfectInterpolantSequences, 126081/140070 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label28_false-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-07-56-635.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label28_false-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-07-56-635.csv Completed graceful shutdown