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/Problem16_label34_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:44:19,008 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:44:19,012 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:44:19,031 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:44:19,031 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:44:19,035 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:44:19,036 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:44:19,039 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:44:19,041 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:44:19,044 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:44:19,047 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:44:19,047 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:44:19,048 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:44:19,049 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:44:19,053 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:44:19,059 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:44:19,060 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:44:19,065 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:44:19,067 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:44:19,069 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:44:19,075 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:44:19,076 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:44:19,080 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:44:19,080 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:44:19,084 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:44:19,085 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:44:19,086 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:44:19,087 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:44:19,089 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:44:19,091 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:44:19,092 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:44:19,094 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:44:19,094 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:44:19,094 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:44:19,095 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:44:19,097 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:44:19,097 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 14:44:19,121 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:44:19,121 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:44:19,122 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:44:19,122 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:44:19,123 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:44:19,123 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:44:19,123 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:44:19,123 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:44:19,123 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:44:19,124 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:44:19,124 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:44:19,125 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:44:19,125 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:44:19,125 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:44:19,125 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:44:19,125 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:44:19,126 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:44:19,126 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:44:19,126 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:44:19,126 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:44:19,126 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:44:19,127 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:44:19,127 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:44:19,127 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:44:19,127 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:44:19,128 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:44:19,128 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:44:19,128 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:44:19,129 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:44:19,130 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:44:19,130 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:44:19,130 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:44:19,131 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:44:19,195 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:44:19,211 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:44:19,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:44:19,220 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:44:19,221 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:44:19,221 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label34_true-unreach-call.c [2018-07-24 14:44:19,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7a2bdeff/999311b5fde940d49af4920f9a1912ef/FLAGfb40e40df [2018-07-24 14:44:19,919 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:44:19,920 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label34_true-unreach-call.c [2018-07-24 14:44:19,944 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7a2bdeff/999311b5fde940d49af4920f9a1912ef/FLAGfb40e40df [2018-07-24 14:44:19,964 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7a2bdeff/999311b5fde940d49af4920f9a1912ef [2018-07-24 14:44:19,977 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:44:19,979 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:44:19,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:44:19,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:44:19,989 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:44:19,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:44:19" (1/1) ... [2018-07-24 14:44:19,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aa504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:19, skipping insertion in model container [2018-07-24 14:44:19,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:44:19" (1/1) ... [2018-07-24 14:44:20,260 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:44:20,863 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:44:20,883 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:44:21,156 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:44:21,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21 WrapperNode [2018-07-24 14:44:21,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:44:21,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:44:21,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:44:21,254 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:44:21,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (1/1) ... [2018-07-24 14:44:21,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (1/1) ... [2018-07-24 14:44:21,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:44:21,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:44:21,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:44:21,440 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:44:21,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (1/1) ... [2018-07-24 14:44:21,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (1/1) ... [2018-07-24 14:44:21,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (1/1) ... [2018-07-24 14:44:21,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (1/1) ... [2018-07-24 14:44:21,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (1/1) ... [2018-07-24 14:44:21,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (1/1) ... [2018-07-24 14:44:21,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (1/1) ... [2018-07-24 14:44:21,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:44:21,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:44:21,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:44:21,886 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:44:21,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:44:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:44:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:44:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:44:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:44:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:44:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:44:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:44:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:44:21,965 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:44:21,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:44:27,611 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:44:27,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:44:27 BoogieIcfgContainer [2018-07-24 14:44:27,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:44:27,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:44:27,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:44:27,617 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:44:27,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:44:19" (1/3) ... [2018-07-24 14:44:27,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c104df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:44:27, skipping insertion in model container [2018-07-24 14:44:27,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:44:21" (2/3) ... [2018-07-24 14:44:27,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c104df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:44:27, skipping insertion in model container [2018-07-24 14:44:27,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:44:27" (3/3) ... [2018-07-24 14:44:27,622 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label34_true-unreach-call.c [2018-07-24 14:44:27,633 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:44:27,643 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:44:27,703 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:44:27,704 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:44:27,704 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:44:27,704 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:44:27,704 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:44:27,704 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:44:27,705 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:44:27,705 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:44:27,705 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:44:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-07-24 14:44:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-07-24 14:44:27,747 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:44:27,749 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:44:27,749 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:44:27,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1571804519, now seen corresponding path program 1 times [2018-07-24 14:44:27,761 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:44:27,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:27,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:27,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:27,815 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:44:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:28,249 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:44:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:44:28,340 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:44:28,341 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 14:44:28,341 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:44:28,347 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:44:28,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:44:28,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:44:28,366 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-07-24 14:44:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:44:33,179 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-07-24 14:44:33,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:44:33,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2018-07-24 14:44:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:44:33,208 INFO L225 Difference]: With dead ends: 1156 [2018-07-24 14:44:33,209 INFO L226 Difference]: Without dead ends: 744 [2018-07-24 14:44:33,223 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:44:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-07-24 14:44:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-07-24 14:44:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-07-24 14:44:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1329 transitions. [2018-07-24 14:44:33,329 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1329 transitions. Word has length 41 [2018-07-24 14:44:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:44:33,329 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1329 transitions. [2018-07-24 14:44:33,330 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:44:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1329 transitions. [2018-07-24 14:44:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-07-24 14:44:33,338 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:44:33,339 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:44:33,339 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:44:33,340 INFO L82 PathProgramCache]: Analyzing trace with hash -563813770, now seen corresponding path program 1 times [2018-07-24 14:44:33,340 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:44:33,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:33,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:33,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:33,342 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:44:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:44:33,707 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:44:33,707 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:44:33,707 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:44:33,709 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:44:33,710 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:44:33,710 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:44:33,710 INFO L87 Difference]: Start difference. First operand 744 states and 1329 transitions. Second operand 6 states. [2018-07-24 14:44:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:44:40,356 INFO L93 Difference]: Finished difference Result 2185 states and 3967 transitions. [2018-07-24 14:44:40,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:44:40,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2018-07-24 14:44:40,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:44:40,374 INFO L225 Difference]: With dead ends: 2185 [2018-07-24 14:44:40,374 INFO L226 Difference]: Without dead ends: 1447 [2018-07-24 14:44:40,379 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 14:44:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2018-07-24 14:44:40,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1442. [2018-07-24 14:44:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2018-07-24 14:44:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2383 transitions. [2018-07-24 14:44:40,460 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2383 transitions. Word has length 149 [2018-07-24 14:44:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:44:40,461 INFO L471 AbstractCegarLoop]: Abstraction has 1442 states and 2383 transitions. [2018-07-24 14:44:40,461 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:44:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2383 transitions. [2018-07-24 14:44:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-07-24 14:44:40,470 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:44:40,471 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:44:40,471 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:44:40,471 INFO L82 PathProgramCache]: Analyzing trace with hash 568869987, now seen corresponding path program 1 times [2018-07-24 14:44:40,472 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:44:40,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:40,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:40,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:40,473 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:44:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:40,916 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:44:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 68 proven. 103 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:44:41,377 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:44:41,379 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:44:41,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:41,396 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:44:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:41,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:44:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-07-24 14:44:42,167 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:44:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 68 proven. 103 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:44:42,511 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:44:42,512 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 14:44:42,512 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:44:42,513 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:44:42,513 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:44:42,514 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:44:42,514 INFO L87 Difference]: Start difference. First operand 1442 states and 2383 transitions. Second operand 5 states. [2018-07-24 14:44:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:44:52,580 INFO L93 Difference]: Finished difference Result 5457 states and 8975 transitions. [2018-07-24 14:44:52,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:44:52,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2018-07-24 14:44:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:44:52,613 INFO L225 Difference]: With dead ends: 5457 [2018-07-24 14:44:52,613 INFO L226 Difference]: Without dead ends: 4021 [2018-07-24 14:44:52,625 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 525 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:44:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2018-07-24 14:44:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3999. [2018-07-24 14:44:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3999 states. [2018-07-24 14:44:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 5628 transitions. [2018-07-24 14:44:52,744 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 5628 transitions. Word has length 265 [2018-07-24 14:44:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:44:52,745 INFO L471 AbstractCegarLoop]: Abstraction has 3999 states and 5628 transitions. [2018-07-24 14:44:52,745 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:44:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 5628 transitions. [2018-07-24 14:44:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-07-24 14:44:52,756 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:44:52,757 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 14:44:52,757 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:44:52,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1555003733, now seen corresponding path program 1 times [2018-07-24 14:44:52,758 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:44:52,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:52,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:52,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:52,759 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:44:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:53,139 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:44:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 108 proven. 232 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 14:44:53,646 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:44:53,646 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:44:53,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:53,655 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:44:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:53,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:44:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 375 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-07-24 14:44:54,028 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:44:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 206 proven. 107 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 14:44:54,461 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:44:54,462 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 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:44:54,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:54,490 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:44:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:54,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:44:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 375 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-07-24 14:44:55,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:44:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 206 proven. 107 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 14:44:55,413 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:44:55,414 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-07-24 14:44:55,414 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:44:55,415 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:44:55,415 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:44:55,415 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:44:55,416 INFO L87 Difference]: Start difference. First operand 3999 states and 5628 transitions. Second operand 9 states. [2018-07-24 14:45:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:45:05,709 INFO L93 Difference]: Finished difference Result 11046 states and 16300 transitions. [2018-07-24 14:45:05,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-24 14:45:05,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 366 [2018-07-24 14:45:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:45:05,755 INFO L225 Difference]: With dead ends: 11046 [2018-07-24 14:45:05,755 INFO L226 Difference]: Without dead ends: 7053 [2018-07-24 14:45:05,798 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1515 GetRequests, 1476 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-07-24 14:45:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7053 states. [2018-07-24 14:45:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7053 to 6988. [2018-07-24 14:45:05,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6988 states. [2018-07-24 14:45:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6988 states to 6988 states and 9146 transitions. [2018-07-24 14:45:05,983 INFO L78 Accepts]: Start accepts. Automaton has 6988 states and 9146 transitions. Word has length 366 [2018-07-24 14:45:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:45:05,984 INFO L471 AbstractCegarLoop]: Abstraction has 6988 states and 9146 transitions. [2018-07-24 14:45:05,984 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:45:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 6988 states and 9146 transitions. [2018-07-24 14:45:06,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2018-07-24 14:45:06,024 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:06,024 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:45:06,025 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:45:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash -287329659, now seen corresponding path program 1 times [2018-07-24 14:45:06,027 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:06,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:06,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:06,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:06,028 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 522 proven. 115 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-07-24 14:45:07,316 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:07,316 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:45:07,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:07,328 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:07,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2018-07-24 14:45:08,003 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 522 proven. 115 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-07-24 14:45:08,458 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:08,458 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 6 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:45:08,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:08,476 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:09,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2018-07-24 14:45:09,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 522 proven. 115 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-07-24 14:45:10,046 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:45:10,046 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:45:10,047 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:45:10,048 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:45:10,048 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:45:10,048 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:45:10,048 INFO L87 Difference]: Start difference. First operand 6988 states and 9146 transitions. Second operand 9 states. [2018-07-24 14:45:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:45:19,586 INFO L93 Difference]: Finished difference Result 15020 states and 20367 transitions. [2018-07-24 14:45:19,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:45:19,587 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 790 [2018-07-24 14:45:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:45:19,626 INFO L225 Difference]: With dead ends: 15020 [2018-07-24 14:45:19,626 INFO L226 Difference]: Without dead ends: 8038 [2018-07-24 14:45:19,675 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3178 GetRequests, 3157 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:45:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8038 states. [2018-07-24 14:45:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8038 to 8027. [2018-07-24 14:45:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2018-07-24 14:45:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 10217 transitions. [2018-07-24 14:45:19,852 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 10217 transitions. Word has length 790 [2018-07-24 14:45:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:45:19,853 INFO L471 AbstractCegarLoop]: Abstraction has 8027 states and 10217 transitions. [2018-07-24 14:45:19,853 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:45:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 10217 transitions. [2018-07-24 14:45:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 799 [2018-07-24 14:45:19,903 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:19,904 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:45:19,904 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:45:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1343703118, now seen corresponding path program 1 times [2018-07-24 14:45:19,904 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:19,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:19,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:19,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:19,906 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-07-24 14:45:21,159 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:21,159 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:45:21,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:21,167 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:21,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-07-24 14:45:21,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-07-24 14:45:22,486 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:22,486 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 8 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:45:22,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:22,502 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:23,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-07-24 14:45:24,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-07-24 14:45:24,837 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:45:24,838 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-07-24 14:45:24,838 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:45:24,839 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:45:24,840 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:45:24,840 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:45:24,840 INFO L87 Difference]: Start difference. First operand 8027 states and 10217 transitions. Second operand 9 states. [2018-07-24 14:45:32,444 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 14:45:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:45:38,092 INFO L93 Difference]: Finished difference Result 24243 states and 32391 transitions. [2018-07-24 14:45:38,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-24 14:45:38,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 798 [2018-07-24 14:45:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:45:38,214 INFO L225 Difference]: With dead ends: 24243 [2018-07-24 14:45:38,215 INFO L226 Difference]: Without dead ends: 12719 [2018-07-24 14:45:38,322 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3265 GetRequests, 3212 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=566, Invalid=2296, Unknown=0, NotChecked=0, Total=2862 [2018-07-24 14:45:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12719 states. [2018-07-24 14:45:38,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12719 to 12683. [2018-07-24 14:45:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12683 states. [2018-07-24 14:45:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12683 states to 12683 states and 14269 transitions. [2018-07-24 14:45:38,667 INFO L78 Accepts]: Start accepts. Automaton has 12683 states and 14269 transitions. Word has length 798 [2018-07-24 14:45:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:45:38,669 INFO L471 AbstractCegarLoop]: Abstraction has 12683 states and 14269 transitions. [2018-07-24 14:45:38,669 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:45:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 12683 states and 14269 transitions. [2018-07-24 14:45:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1073 [2018-07-24 14:45:38,718 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:38,719 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:45:38,719 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:45:38,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1272565509, now seen corresponding path program 1 times [2018-07-24 14:45:38,720 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:38,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:38,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:38,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:38,722 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:39,487 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:45:39,955 WARN L169 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 14:45:40,405 WARN L169 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 14:45:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 854 proven. 175 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-07-24 14:45:43,338 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:43,338 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:45:43,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:43,347 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:43,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-07-24 14:45:44,204 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-07-24 14:45:44,984 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:44,985 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:45:45,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:45,002 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:45,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-07-24 14:45:46,377 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-07-24 14:45:47,262 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:45:47,263 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 5, 5] total 22 [2018-07-24 14:45:47,263 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:45:47,265 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 14:45:47,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 14:45:47,265 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:45:47,266 INFO L87 Difference]: Start difference. First operand 12683 states and 14269 transitions. Second operand 16 states. [2018-07-24 14:45:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:45:57,863 INFO L93 Difference]: Finished difference Result 27449 states and 30896 transitions. [2018-07-24 14:45:57,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-24 14:45:57,863 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1072 [2018-07-24 14:45:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:45:57,961 INFO L225 Difference]: With dead ends: 27449 [2018-07-24 14:45:57,962 INFO L226 Difference]: Without dead ends: 14772 [2018-07-24 14:45:58,026 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4364 GetRequests, 4305 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2018-07-24 14:45:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14772 states. [2018-07-24 14:45:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14772 to 14734. [2018-07-24 14:45:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14734 states. [2018-07-24 14:45:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14734 states to 14734 states and 16181 transitions. [2018-07-24 14:45:58,341 INFO L78 Accepts]: Start accepts. Automaton has 14734 states and 16181 transitions. Word has length 1072 [2018-07-24 14:45:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:45:58,344 INFO L471 AbstractCegarLoop]: Abstraction has 14734 states and 16181 transitions. [2018-07-24 14:45:58,344 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 14:45:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 14734 states and 16181 transitions. [2018-07-24 14:45:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1074 [2018-07-24 14:45:58,394 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:58,395 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:45:58,395 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:45:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2002526148, now seen corresponding path program 1 times [2018-07-24 14:45:58,396 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:58,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:58,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:58,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:58,397 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-07-24 14:45:59,672 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:59,672 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:45:59,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:59,682 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:00,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-07-24 14:46:00,817 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-07-24 14:46:01,466 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:01,466 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:46:01,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:01,486 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:02,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-07-24 14:46:02,887 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-07-24 14:46:03,558 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:46:03,559 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:46:03,559 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:46:03,560 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:46:03,560 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:46:03,561 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:46:03,561 INFO L87 Difference]: Start difference. First operand 14734 states and 16181 transitions. Second operand 9 states. [2018-07-24 14:46:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:10,473 INFO L93 Difference]: Finished difference Result 30134 states and 32932 transitions. [2018-07-24 14:46:10,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-24 14:46:10,473 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1073 [2018-07-24 14:46:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:10,529 INFO L225 Difference]: With dead ends: 30134 [2018-07-24 14:46:10,529 INFO L226 Difference]: Without dead ends: 12650 [2018-07-24 14:46:10,589 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4318 GetRequests, 4292 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-07-24 14:46:10,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12650 states. [2018-07-24 14:46:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12650 to 12520. [2018-07-24 14:46:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12520 states. [2018-07-24 14:46:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12520 states to 12520 states and 13155 transitions. [2018-07-24 14:46:10,813 INFO L78 Accepts]: Start accepts. Automaton has 12520 states and 13155 transitions. Word has length 1073 [2018-07-24 14:46:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:46:10,815 INFO L471 AbstractCegarLoop]: Abstraction has 12520 states and 13155 transitions. [2018-07-24 14:46:10,815 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:46:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 12520 states and 13155 transitions. [2018-07-24 14:46:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2018-07-24 14:46:10,856 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:46:10,857 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:46:10,858 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:46:10,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1357035898, now seen corresponding path program 1 times [2018-07-24 14:46:10,858 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:46:10,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:10,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:10,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:10,860 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:46:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:11,710 WARN L169 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 14:46:12,071 WARN L169 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-07-24 14:46:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 821 proven. 254 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-07-24 14:46:15,556 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:15,556 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:46:15,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:15,566 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:15,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 2146 trivial. 0 not checked. [2018-07-24 14:46:16,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 2146 trivial. 0 not checked. [2018-07-24 14:46:17,245 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:46:17,246 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [12] total 13 [2018-07-24 14:46:17,246 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:46:17,248 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:46:17,248 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:46:17,248 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:46:17,249 INFO L87 Difference]: Start difference. First operand 12520 states and 13155 transitions. Second operand 3 states. [2018-07-24 14:46:18,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:18,639 INFO L93 Difference]: Finished difference Result 23386 states and 24572 transitions. [2018-07-24 14:46:18,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:46:18,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1160 [2018-07-24 14:46:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:18,681 INFO L225 Difference]: With dead ends: 23386 [2018-07-24 14:46:18,681 INFO L226 Difference]: Without dead ends: 12520 [2018-07-24 14:46:18,707 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2331 GetRequests, 2318 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:46:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12520 states. [2018-07-24 14:46:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12520 to 12231. [2018-07-24 14:46:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12231 states. [2018-07-24 14:46:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12231 states to 12231 states and 12817 transitions. [2018-07-24 14:46:18,906 INFO L78 Accepts]: Start accepts. Automaton has 12231 states and 12817 transitions. Word has length 1160 [2018-07-24 14:46:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:46:18,908 INFO L471 AbstractCegarLoop]: Abstraction has 12231 states and 12817 transitions. [2018-07-24 14:46:18,908 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:46:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 12231 states and 12817 transitions. [2018-07-24 14:46:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1414 [2018-07-24 14:46:18,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:46:18,952 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:46:18,953 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:46:18,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1368620095, now seen corresponding path program 1 times [2018-07-24 14:46:18,953 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:46:18,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:18,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:18,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:18,957 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:46:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 868 proven. 247 refuted. 0 times theorem prover too weak. 2869 trivial. 0 not checked. [2018-07-24 14:46:21,221 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:21,221 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:46:21,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:21,229 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:21,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 734 proven. 0 refuted. 0 times theorem prover too weak. 3250 trivial. 0 not checked. [2018-07-24 14:46:22,481 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 272 proven. 672 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2018-07-24 14:46:23,623 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:46:23,624 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-07-24 14:46:23,624 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:46:23,625 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:46:23,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:46:23,625 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:46:23,626 INFO L87 Difference]: Start difference. First operand 12231 states and 12817 transitions. Second operand 5 states. [2018-07-24 14:46:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:27,929 INFO L93 Difference]: Finished difference Result 37253 states and 39193 transitions. [2018-07-24 14:46:27,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:46:27,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1413 [2018-07-24 14:46:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:28,029 INFO L225 Difference]: With dead ends: 37253 [2018-07-24 14:46:28,030 INFO L226 Difference]: Without dead ends: 24724 [2018-07-24 14:46:28,081 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2843 GetRequests, 2825 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2018-07-24 14:46:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24724 states. [2018-07-24 14:46:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24724 to 23025. [2018-07-24 14:46:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23025 states. [2018-07-24 14:46:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23025 states to 23025 states and 24168 transitions. [2018-07-24 14:46:28,455 INFO L78 Accepts]: Start accepts. Automaton has 23025 states and 24168 transitions. Word has length 1413 [2018-07-24 14:46:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:46:28,455 INFO L471 AbstractCegarLoop]: Abstraction has 23025 states and 24168 transitions. [2018-07-24 14:46:28,455 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:46:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 23025 states and 24168 transitions. [2018-07-24 14:46:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1640 [2018-07-24 14:46:28,531 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:46:28,532 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:46:28,532 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:46:28,533 INFO L82 PathProgramCache]: Analyzing trace with hash 384494025, now seen corresponding path program 1 times [2018-07-24 14:46:28,533 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:46:28,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:28,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:28,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:28,538 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:46:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 1068 proven. 588 refuted. 0 times theorem prover too weak. 3353 trivial. 0 not checked. [2018-07-24 14:46:32,050 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:32,050 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:46:32,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:32,155 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:32,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:33,090 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-07-24 14:46:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 2314 proven. 2 refuted. 0 times theorem prover too weak. 2693 trivial. 0 not checked. [2018-07-24 14:46:34,437 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:34,703 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-07-24 14:46:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 303 proven. 2193 refuted. 0 times theorem prover too weak. 2513 trivial. 0 not checked. [2018-07-24 14:46:38,081 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:38,082 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:46:38,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:38,098 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:39,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 3493 proven. 14 refuted. 0 times theorem prover too weak. 1502 trivial. 0 not checked. [2018-07-24 14:46:40,762 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 1068 proven. 588 refuted. 0 times theorem prover too weak. 3353 trivial. 0 not checked. [2018-07-24 14:46:44,612 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:46:44,614 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 6, 5] total 23 [2018-07-24 14:46:44,614 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:46:44,615 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 14:46:44,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 14:46:44,616 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2018-07-24 14:46:44,616 INFO L87 Difference]: Start difference. First operand 23025 states and 24168 transitions. Second operand 14 states. [2018-07-24 14:46:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:46:58,202 INFO L93 Difference]: Finished difference Result 49471 states and 51961 transitions. [2018-07-24 14:46:58,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-24 14:46:58,203 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1639 [2018-07-24 14:46:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:46:58,286 INFO L225 Difference]: With dead ends: 49471 [2018-07-24 14:46:58,286 INFO L226 Difference]: Without dead ends: 25874 [2018-07-24 14:46:58,350 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6617 GetRequests, 6562 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=427, Invalid=2123, Unknown=0, NotChecked=0, Total=2550 [2018-07-24 14:46:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2018-07-24 14:46:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 23396. [2018-07-24 14:46:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23396 states. [2018-07-24 14:46:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23396 states to 23396 states and 24499 transitions. [2018-07-24 14:46:58,703 INFO L78 Accepts]: Start accepts. Automaton has 23396 states and 24499 transitions. Word has length 1639 [2018-07-24 14:46:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:46:58,704 INFO L471 AbstractCegarLoop]: Abstraction has 23396 states and 24499 transitions. [2018-07-24 14:46:58,704 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 14:46:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 23396 states and 24499 transitions. [2018-07-24 14:46:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1835 [2018-07-24 14:46:58,789 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:46:58,790 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:46:58,790 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:46:58,791 INFO L82 PathProgramCache]: Analyzing trace with hash -149899618, now seen corresponding path program 1 times [2018-07-24 14:46:58,791 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:46:58,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:58,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:58,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:46:58,792 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:46:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 938 proven. 676 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2018-07-24 14:47:01,244 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:01,244 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:47:01,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:01,251 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:01,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 4094 proven. 2 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2018-07-24 14:47:03,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 938 proven. 676 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2018-07-24 14:47:04,947 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:04,947 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:47:04,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:04,966 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:06,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 4094 proven. 2 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2018-07-24 14:47:07,476 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 938 proven. 676 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2018-07-24 14:47:09,972 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:47:09,973 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:47:09,973 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:47:09,975 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:47:09,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:47:09,975 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:47:09,975 INFO L87 Difference]: Start difference. First operand 23396 states and 24499 transitions. Second operand 9 states. [2018-07-24 14:47:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:47:14,873 INFO L93 Difference]: Finished difference Result 43929 states and 46331 transitions. [2018-07-24 14:47:14,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:47:14,874 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1834 [2018-07-24 14:47:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:47:14,945 INFO L225 Difference]: With dead ends: 43929 [2018-07-24 14:47:14,945 INFO L226 Difference]: Without dead ends: 23201 [2018-07-24 14:47:14,998 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7358 GetRequests, 7337 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-07-24 14:47:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23201 states. [2018-07-24 14:47:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23201 to 22706. [2018-07-24 14:47:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22706 states. [2018-07-24 14:47:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22706 states to 22706 states and 23581 transitions. [2018-07-24 14:47:15,333 INFO L78 Accepts]: Start accepts. Automaton has 22706 states and 23581 transitions. Word has length 1834 [2018-07-24 14:47:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:47:15,334 INFO L471 AbstractCegarLoop]: Abstraction has 22706 states and 23581 transitions. [2018-07-24 14:47:15,334 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:47:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 22706 states and 23581 transitions. [2018-07-24 14:47:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1943 [2018-07-24 14:47:15,403 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:47:15,404 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:47:15,404 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:47:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash 402522256, now seen corresponding path program 1 times [2018-07-24 14:47:15,405 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:47:15,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:15,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:15,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:15,406 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:47:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2775 proven. 1492 refuted. 0 times theorem prover too weak. 2789 trivial. 0 not checked. [2018-07-24 14:47:21,698 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:21,698 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:47:21,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:21,707 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:22,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3907 proven. 2 refuted. 0 times theorem prover too weak. 3147 trivial. 0 not checked. [2018-07-24 14:47:23,826 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:24,497 WARN L169 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-07-24 14:47:24,654 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 14:47:25,191 WARN L169 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-07-24 14:47:25,387 WARN L169 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-07-24 14:47:26,362 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 14:47:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 1713 proven. 336 refuted. 0 times theorem prover too weak. 5007 trivial. 0 not checked. [2018-07-24 14:47:28,768 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:28,768 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:47:28,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:28,783 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:30,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 4248 proven. 2 refuted. 0 times theorem prover too weak. 2806 trivial. 0 not checked. [2018-07-24 14:47:31,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:47:32,238 WARN L169 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 14:47:32,408 WARN L169 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 14:47:32,679 WARN L169 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-07-24 14:47:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 866 proven. 567 refuted. 0 times theorem prover too weak. 5623 trivial. 0 not checked. [2018-07-24 14:47:34,843 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:47:34,844 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 5, 5] total 25 [2018-07-24 14:47:34,844 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:47:34,846 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 14:47:34,846 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 14:47:34,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-07-24 14:47:34,847 INFO L87 Difference]: Start difference. First operand 22706 states and 23581 transitions. Second operand 19 states. [2018-07-24 14:47:36,643 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-07-24 14:47:40,723 WARN L169 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-07-24 14:47:45,803 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2018-07-24 14:47:47,584 WARN L169 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-07-24 14:47:48,874 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2018-07-24 14:47:50,087 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-07-24 14:47:50,271 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2018-07-24 14:47:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:47:50,703 INFO L93 Difference]: Finished difference Result 42116 states and 43917 transitions. [2018-07-24 14:47:50,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-07-24 14:47:50,704 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1942 [2018-07-24 14:47:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:47:50,774 INFO L225 Difference]: With dead ends: 42116 [2018-07-24 14:47:50,774 INFO L226 Difference]: Without dead ends: 23136 [2018-07-24 14:47:50,816 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7880 GetRequests, 7798 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1051, Invalid=5269, Unknown=0, NotChecked=0, Total=6320 [2018-07-24 14:47:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2018-07-24 14:47:51,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 22029. [2018-07-24 14:47:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22029 states. [2018-07-24 14:47:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22029 states to 22029 states and 22798 transitions. [2018-07-24 14:47:51,174 INFO L78 Accepts]: Start accepts. Automaton has 22029 states and 22798 transitions. Word has length 1942 [2018-07-24 14:47:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:47:51,176 INFO L471 AbstractCegarLoop]: Abstraction has 22029 states and 22798 transitions. [2018-07-24 14:47:51,176 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 14:47:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 22029 states and 22798 transitions. [2018-07-24 14:47:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1973 [2018-07-24 14:47:51,239 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:47:51,240 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:47:51,240 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:47:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1486303465, now seen corresponding path program 1 times [2018-07-24 14:47:51,241 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:47:51,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:51,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:51,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:47:51,242 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:47:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 3456 proven. 557 refuted. 0 times theorem prover too weak. 4315 trivial. 0 not checked. [2018-07-24 14:47:54,896 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:47:54,896 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:47:54,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:47:54,904 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:47:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:47:55,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:47:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 5765 proven. 6 refuted. 0 times theorem prover too weak. 2557 trivial. 0 not checked. [2018-07-24 14:47:57,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:48:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 1720 proven. 1099 refuted. 0 times theorem prover too weak. 5509 trivial. 0 not checked. [2018-07-24 14:48:00,298 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:48:00,298 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:48:00,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:48:00,314 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:48:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:48:01,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:48:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 5033 proven. 872 refuted. 0 times theorem prover too weak. 2423 trivial. 0 not checked. [2018-07-24 14:48:03,700 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:48:03,866 WARN L169 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-07-24 14:48:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 1581 proven. 549 refuted. 0 times theorem prover too weak. 6198 trivial. 0 not checked. [2018-07-24 14:48:07,846 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:48:07,848 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 7, 5] total 32 [2018-07-24 14:48:07,848 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:48:07,850 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 14:48:07,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 14:48:07,851 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2018-07-24 14:48:07,851 INFO L87 Difference]: Start difference. First operand 22029 states and 22798 transitions. Second operand 20 states. Received shutdown request... [2018-07-24 14:48:11,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:48:11,558 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:48:11,563 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:48:11,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:48:11 BoogieIcfgContainer [2018-07-24 14:48:11,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:48:11,565 INFO L168 Benchmark]: Toolchain (without parser) took 231587.13 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -276.5 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-07-24 14:48:11,566 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 14:48:11,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1273.72 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-07-24 14:48:11,567 INFO L168 Benchmark]: Boogie Procedure Inliner took 185.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 14:48:11,568 INFO L168 Benchmark]: Boogie Preprocessor took 445.47 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 837.8 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -977.2 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:48:11,568 INFO L168 Benchmark]: RCFGBuilder took 5727.30 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 286.8 MB). Peak memory consumption was 286.8 MB. Max. memory is 7.1 GB. [2018-07-24 14:48:11,569 INFO L168 Benchmark]: TraceAbstraction took 223950.37 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 297.6 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-07-24 14:48:11,574 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1273.72 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 185.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 445.47 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 837.8 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -977.2 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5727.30 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 286.8 MB). Peak memory consumption was 286.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 223950.37 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 297.6 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 109). Cancelled while BasicCegarLoop was constructing difference of abstraction (22029states) and interpolant automaton (currently 8 states, 20 states before enhancement), while ReachableStatesComputation was computing reachable states (717 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 223.8s OverallTime, 14 OverallIterations, 12 TraceHistogramMax, 117.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1896 SDtfs, 34702 SDslu, 3522 SDs, 0 SdLazy, 74284 SolverSat, 10021 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 89.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52138 GetRequests, 51689 SyntacticMatches, 39 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5002 ImplicationChecksByTransitivity, 22.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23396occurred in iteration=11, 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, 13 MinimizatonAttempts, 6375 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 12.0s SatisfiabilityAnalysisTime, 69.6s InterpolantComputationTime, 40324 NumberOfCodeBlocks, 40324 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 66078 ConstructedInterpolants, 7 QuantifiedInterpolants, 253268894 SizeOfPredicates, 14 NumberOfNonLiveVariables, 34045 ConjunctsInSsa, 171 ConjunctsInUnsatCore, 56 InterpolantComputations, 6 PerfectInterpolantSequences, 184689/197969 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/Problem16_label34_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-48-11-587.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label34_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-48-11-587.csv Completed graceful shutdown