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_label21_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:42:34,536 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:42:34,539 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:42:34,558 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:42:34,558 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:42:34,560 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:42:34,561 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:42:34,564 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:42:34,566 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:42:34,573 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:42:34,574 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:42:34,575 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:42:34,578 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:42:34,579 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:42:34,580 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:42:34,583 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:42:34,584 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:42:34,587 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:42:34,591 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:42:34,596 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:42:34,597 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:42:34,598 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:42:34,603 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:42:34,603 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:42:34,603 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:42:34,604 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:42:34,607 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:42:34,608 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:42:34,609 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:42:34,610 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:42:34,612 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:42:34,613 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:42:34,613 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:42:34,613 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:42:34,616 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:42:34,617 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:42:34,618 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 14:42:34,645 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:42:34,645 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:42:34,646 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:42:34,646 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:42:34,646 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:42:34,646 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:42:34,647 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:42:34,647 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:42:34,647 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:42:34,647 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:42:34,647 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:42:34,648 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:42:34,648 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:42:34,649 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:42:34,649 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:42:34,649 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:42:34,649 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:42:34,649 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:42:34,650 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:42:34,650 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:42:34,650 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:42:34,650 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:42:34,650 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:42:34,651 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:42:34,651 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:42:34,651 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:42:34,651 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:42:34,652 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:42:34,652 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:42:34,652 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:42:34,652 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:42:34,652 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:42:34,653 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:42:34,709 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:42:34,721 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:42:34,726 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:42:34,727 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:42:34,728 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:42:34,729 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label21_true-unreach-call.c [2018-07-24 14:42:35,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fdc6f1d7/663a74a7a80f43f2b9deb1ac77d09086/FLAGed503cc4c [2018-07-24 14:42:35,486 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:42:35,491 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label21_true-unreach-call.c [2018-07-24 14:42:35,520 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fdc6f1d7/663a74a7a80f43f2b9deb1ac77d09086/FLAGed503cc4c [2018-07-24 14:42:35,538 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fdc6f1d7/663a74a7a80f43f2b9deb1ac77d09086 [2018-07-24 14:42:35,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:42:35,557 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:42:35,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:42:35,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:42:35,570 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:42:35,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:42:35" (1/1) ... [2018-07-24 14:42:35,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51dc4ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:35, skipping insertion in model container [2018-07-24 14:42:35,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:42:35" (1/1) ... [2018-07-24 14:42:35,900 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:42:36,402 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:42:36,419 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:42:36,811 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:42:36,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36 WrapperNode [2018-07-24 14:42:36,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:42:36,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:42:36,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:42:36,929 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:42:36,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (1/1) ... [2018-07-24 14:42:36,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (1/1) ... [2018-07-24 14:42:37,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:42:37,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:42:37,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:42:37,143 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:42:37,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (1/1) ... [2018-07-24 14:42:37,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (1/1) ... [2018-07-24 14:42:37,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (1/1) ... [2018-07-24 14:42:37,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (1/1) ... [2018-07-24 14:42:37,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (1/1) ... [2018-07-24 14:42:37,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (1/1) ... [2018-07-24 14:42:37,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (1/1) ... [2018-07-24 14:42:37,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:42:37,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:42:37,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:42:37,703 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:42:37,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (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 14:42:37,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:42:37,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:42:37,786 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 14:42:37,786 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 14:42:37,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:42:37,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:42:37,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:42:37,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:42:37,787 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 14:42:37,787 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 14:42:44,216 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:42:44,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:42:44 BoogieIcfgContainer [2018-07-24 14:42:44,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:42:44,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:42:44,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:42:44,227 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:42:44,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:42:35" (1/3) ... [2018-07-24 14:42:44,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3dd2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:42:44, skipping insertion in model container [2018-07-24 14:42:44,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:42:36" (2/3) ... [2018-07-24 14:42:44,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f3dd2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:42:44, skipping insertion in model container [2018-07-24 14:42:44,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:42:44" (3/3) ... [2018-07-24 14:42:44,232 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label21_true-unreach-call.c [2018-07-24 14:42:44,245 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:42:44,257 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:42:44,311 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:42:44,312 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:42:44,313 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:42:44,313 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:42:44,313 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:42:44,313 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:42:44,313 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:42:44,314 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:42:44,314 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:42:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-07-24 14:42:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-07-24 14:42:44,356 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:42:44,357 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:42:44,358 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 14:42:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1517066601, now seen corresponding path program 1 times [2018-07-24 14:42:44,366 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:42:44,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:44,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:44,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:44,420 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:42:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:44,860 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 14:42:44,863 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:42:44,863 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:42:44,863 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:42:44,871 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:42:44,888 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:42:44,889 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:42:44,892 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-07-24 14:42:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:42:52,979 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-07-24 14:42:52,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:42:52,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-07-24 14:42:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:42:53,019 INFO L225 Difference]: With dead ends: 1513 [2018-07-24 14:42:53,019 INFO L226 Difference]: Without dead ends: 1097 [2018-07-24 14:42:53,035 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:42:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-07-24 14:42:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 744. [2018-07-24 14:42:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-07-24 14:42:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1301 transitions. [2018-07-24 14:42:53,153 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1301 transitions. Word has length 45 [2018-07-24 14:42:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:42:53,153 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1301 transitions. [2018-07-24 14:42:53,154 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:42:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1301 transitions. [2018-07-24 14:42:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-07-24 14:42:53,160 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:42:53,161 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:42:53,161 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 14:42:53,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2092302891, now seen corresponding path program 1 times [2018-07-24 14:42:53,162 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:42:53,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:53,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:53,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:53,163 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:42:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:42:53,508 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:42:53,508 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:42:53,508 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:42:53,510 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:42:53,510 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:42:53,511 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:42:53,511 INFO L87 Difference]: Start difference. First operand 744 states and 1301 transitions. Second operand 6 states. [2018-07-24 14:42:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:42:58,798 INFO L93 Difference]: Finished difference Result 2196 states and 3924 transitions. [2018-07-24 14:42:58,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:42:58,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2018-07-24 14:42:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:42:58,819 INFO L225 Difference]: With dead ends: 2196 [2018-07-24 14:42:58,819 INFO L226 Difference]: Without dead ends: 1458 [2018-07-24 14:42:58,823 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 14:42:58,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2018-07-24 14:42:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1438. [2018-07-24 14:42:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2018-07-24 14:42:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2463 transitions. [2018-07-24 14:42:58,905 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2463 transitions. Word has length 116 [2018-07-24 14:42:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:42:58,905 INFO L471 AbstractCegarLoop]: Abstraction has 1438 states and 2463 transitions. [2018-07-24 14:42:58,906 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:42:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2463 transitions. [2018-07-24 14:42:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-07-24 14:42:58,909 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:42:58,910 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:42:58,910 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 14:42:58,910 INFO L82 PathProgramCache]: Analyzing trace with hash 767516542, now seen corresponding path program 1 times [2018-07-24 14:42:58,910 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:42:58,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:58,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:42:58,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:42:58,912 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:42:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:42:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:42:59,110 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:42:59,110 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 14:42:59,110 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:42:59,110 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:42:59,111 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:42:59,111 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:42:59,111 INFO L87 Difference]: Start difference. First operand 1438 states and 2463 transitions. Second operand 5 states. [2018-07-24 14:43:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:43:03,695 INFO L93 Difference]: Finished difference Result 3597 states and 6200 transitions. [2018-07-24 14:43:03,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:43:03,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2018-07-24 14:43:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:43:03,723 INFO L225 Difference]: With dead ends: 3597 [2018-07-24 14:43:03,723 INFO L226 Difference]: Without dead ends: 2165 [2018-07-24 14:43:03,730 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:43:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2018-07-24 14:43:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2145. [2018-07-24 14:43:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2145 states. [2018-07-24 14:43:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 3126 transitions. [2018-07-24 14:43:03,818 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 3126 transitions. Word has length 117 [2018-07-24 14:43:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:43:03,823 INFO L471 AbstractCegarLoop]: Abstraction has 2145 states and 3126 transitions. [2018-07-24 14:43:03,823 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:43:03,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 3126 transitions. [2018-07-24 14:43:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-24 14:43:03,833 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:43:03,834 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:43:03,834 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 14:43:03,834 INFO L82 PathProgramCache]: Analyzing trace with hash -369023626, now seen corresponding path program 1 times [2018-07-24 14:43:03,835 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:43:03,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:03,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:03,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:03,837 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:43:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:43:04,323 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:43:04,323 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:43:04,323 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:43:04,324 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:43:04,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:43:04,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:43:04,325 INFO L87 Difference]: Start difference. First operand 2145 states and 3126 transitions. Second operand 6 states. [2018-07-24 14:43:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:43:11,101 INFO L93 Difference]: Finished difference Result 7058 states and 10436 transitions. [2018-07-24 14:43:11,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:43:11,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 209 [2018-07-24 14:43:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:43:11,133 INFO L225 Difference]: With dead ends: 7058 [2018-07-24 14:43:11,134 INFO L226 Difference]: Without dead ends: 4919 [2018-07-24 14:43:11,154 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 14:43:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4919 states. [2018-07-24 14:43:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4919 to 4879. [2018-07-24 14:43:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4879 states. [2018-07-24 14:43:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 6857 transitions. [2018-07-24 14:43:11,335 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 6857 transitions. Word has length 209 [2018-07-24 14:43:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:43:11,335 INFO L471 AbstractCegarLoop]: Abstraction has 4879 states and 6857 transitions. [2018-07-24 14:43:11,335 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:43:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 6857 transitions. [2018-07-24 14:43:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-07-24 14:43:11,339 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:43:11,340 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:43:11,340 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 14:43:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1931248990, now seen corresponding path program 1 times [2018-07-24 14:43:11,340 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:43:11,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:11,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:11,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:11,342 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:43:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:11,618 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:43:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:43:11,714 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:43:11,714 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:43:11,714 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:43:11,714 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:43:11,715 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:43:11,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:43:11,715 INFO L87 Difference]: Start difference. First operand 4879 states and 6857 transitions. Second operand 6 states. [2018-07-24 14:43:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:43:15,873 INFO L93 Difference]: Finished difference Result 12216 states and 17406 transitions. [2018-07-24 14:43:15,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:43:15,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 229 [2018-07-24 14:43:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:43:15,912 INFO L225 Difference]: With dead ends: 12216 [2018-07-24 14:43:15,912 INFO L226 Difference]: Without dead ends: 7343 [2018-07-24 14:43:15,942 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 14:43:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7343 states. [2018-07-24 14:43:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7343 to 7306. [2018-07-24 14:43:16,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7306 states. [2018-07-24 14:43:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7306 states to 7306 states and 9825 transitions. [2018-07-24 14:43:16,150 INFO L78 Accepts]: Start accepts. Automaton has 7306 states and 9825 transitions. Word has length 229 [2018-07-24 14:43:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:43:16,151 INFO L471 AbstractCegarLoop]: Abstraction has 7306 states and 9825 transitions. [2018-07-24 14:43:16,151 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:43:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7306 states and 9825 transitions. [2018-07-24 14:43:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-07-24 14:43:16,157 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:43:16,158 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:16,158 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 14:43:16,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1802925492, now seen corresponding path program 1 times [2018-07-24 14:43:16,158 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:43:16,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:16,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:16,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:16,160 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:43:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 14:43:16,438 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:43:16,438 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:43:16,438 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:43:16,439 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:43:16,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:43:16,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:43:16,440 INFO L87 Difference]: Start difference. First operand 7306 states and 9825 transitions. Second operand 4 states. [2018-07-24 14:43:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:43:21,225 INFO L93 Difference]: Finished difference Result 18701 states and 25596 transitions. [2018-07-24 14:43:21,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:43:21,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 246 [2018-07-24 14:43:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:43:21,377 INFO L225 Difference]: With dead ends: 18701 [2018-07-24 14:43:21,378 INFO L226 Difference]: Without dead ends: 11401 [2018-07-24 14:43:21,411 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:43:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11401 states. [2018-07-24 14:43:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11401 to 11401. [2018-07-24 14:43:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11401 states. [2018-07-24 14:43:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11401 states to 11401 states and 14531 transitions. [2018-07-24 14:43:21,646 INFO L78 Accepts]: Start accepts. Automaton has 11401 states and 14531 transitions. Word has length 246 [2018-07-24 14:43:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:43:21,647 INFO L471 AbstractCegarLoop]: Abstraction has 11401 states and 14531 transitions. [2018-07-24 14:43:21,647 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:43:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 11401 states and 14531 transitions. [2018-07-24 14:43:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-07-24 14:43:21,656 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:43:21,657 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:21,657 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 14:43:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1558860254, now seen corresponding path program 1 times [2018-07-24 14:43:21,657 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:43:21,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:21,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:21,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:21,659 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:43:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:21,978 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:43:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 14:43:22,272 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:43:22,272 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 14:43:22,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:22,291 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:43:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:22,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:43:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:43:22,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:43:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:43:22,864 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:43:22,865 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2018-07-24 14:43:22,865 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:43:22,866 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:43:22,867 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:43:22,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:43:22,867 INFO L87 Difference]: Start difference. First operand 11401 states and 14531 transitions. Second operand 3 states. [2018-07-24 14:43:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:43:26,682 INFO L93 Difference]: Finished difference Result 25838 states and 32823 transitions. [2018-07-24 14:43:26,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:43:26,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 293 [2018-07-24 14:43:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:43:26,755 INFO L225 Difference]: With dead ends: 25838 [2018-07-24 14:43:26,755 INFO L226 Difference]: Without dead ends: 14443 [2018-07-24 14:43:26,815 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 585 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:43:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14443 states. [2018-07-24 14:43:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14443 to 14443. [2018-07-24 14:43:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14443 states. [2018-07-24 14:43:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14443 states to 14443 states and 17704 transitions. [2018-07-24 14:43:27,147 INFO L78 Accepts]: Start accepts. Automaton has 14443 states and 17704 transitions. Word has length 293 [2018-07-24 14:43:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:43:27,148 INFO L471 AbstractCegarLoop]: Abstraction has 14443 states and 17704 transitions. [2018-07-24 14:43:27,148 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:43:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 14443 states and 17704 transitions. [2018-07-24 14:43:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2018-07-24 14:43:27,163 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:43:27,163 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:43:27,164 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 14:43:27,164 INFO L82 PathProgramCache]: Analyzing trace with hash 946170763, now seen corresponding path program 1 times [2018-07-24 14:43:27,164 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:43:27,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:27,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:27,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:27,166 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:43:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 233 proven. 92 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-07-24 14:43:28,174 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:43:28,175 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 14:43:28,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:28,190 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:43:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:28,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:43:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 375 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-07-24 14:43:28,655 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:43:28,866 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 14:43:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 233 proven. 92 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-07-24 14:43:29,366 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:43:29,367 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 14:43:29,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:29,397 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:43:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:29,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:43:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 375 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-07-24 14:43:29,863 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:43:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 233 proven. 92 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-07-24 14:43:30,120 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:43:30,120 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 14:43:30,120 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:43:30,121 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:43:30,121 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:43:30,121 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:43:30,122 INFO L87 Difference]: Start difference. First operand 14443 states and 17704 transitions. Second operand 9 states. [2018-07-24 14:43:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:43:39,912 INFO L93 Difference]: Finished difference Result 30263 states and 38380 transitions. [2018-07-24 14:43:39,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:43:39,915 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 384 [2018-07-24 14:43:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:43:39,991 INFO L225 Difference]: With dead ends: 30263 [2018-07-24 14:43:39,991 INFO L226 Difference]: Without dead ends: 15826 [2018-07-24 14:43:40,037 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1556 GetRequests, 1534 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2018-07-24 14:43:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15826 states. [2018-07-24 14:43:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15826 to 15731. [2018-07-24 14:43:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15731 states. [2018-07-24 14:43:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15731 states to 15731 states and 19238 transitions. [2018-07-24 14:43:40,436 INFO L78 Accepts]: Start accepts. Automaton has 15731 states and 19238 transitions. Word has length 384 [2018-07-24 14:43:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:43:40,437 INFO L471 AbstractCegarLoop]: Abstraction has 15731 states and 19238 transitions. [2018-07-24 14:43:40,437 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:43:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 15731 states and 19238 transitions. [2018-07-24 14:43:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2018-07-24 14:43:40,453 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:43:40,454 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:43:40,454 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 14:43:40,454 INFO L82 PathProgramCache]: Analyzing trace with hash -628686525, now seen corresponding path program 1 times [2018-07-24 14:43:40,455 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:43:40,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:40,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:40,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:40,456 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:43:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-07-24 14:43:40,893 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:43:40,893 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:43:40,893 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:43:40,894 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:43:40,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:43:40,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:43:40,895 INFO L87 Difference]: Start difference. First operand 15731 states and 19238 transitions. Second operand 4 states. [2018-07-24 14:43:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:43:48,931 INFO L93 Difference]: Finished difference Result 46331 states and 58625 transitions. [2018-07-24 14:43:48,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:43:48,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2018-07-24 14:43:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:43:49,042 INFO L225 Difference]: With dead ends: 46331 [2018-07-24 14:43:49,042 INFO L226 Difference]: Without dead ends: 27771 [2018-07-24 14:43:49,173 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:43:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27771 states. [2018-07-24 14:43:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27771 to 27424. [2018-07-24 14:43:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27424 states. [2018-07-24 14:43:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27424 states to 27424 states and 30488 transitions. [2018-07-24 14:43:49,760 INFO L78 Accepts]: Start accepts. Automaton has 27424 states and 30488 transitions. Word has length 469 [2018-07-24 14:43:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:43:49,761 INFO L471 AbstractCegarLoop]: Abstraction has 27424 states and 30488 transitions. [2018-07-24 14:43:49,761 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:43:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 27424 states and 30488 transitions. [2018-07-24 14:43:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1101 [2018-07-24 14:43:49,902 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:43:49,903 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:43:49,903 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 14:43:49,904 INFO L82 PathProgramCache]: Analyzing trace with hash 458930906, now seen corresponding path program 1 times [2018-07-24 14:43:49,904 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:43:49,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:49,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:49,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:43:49,905 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:43:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:51,049 WARN L169 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 14:43:51,199 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:43:51,661 WARN L169 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-07-24 14:43:52,261 WARN L169 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-07-24 14:43:52,895 WARN L169 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2018-07-24 14:43:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 609 proven. 273 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-07-24 14:43:56,448 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:43:56,448 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 14:43:56,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:43:56,456 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:43:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:43:56,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:43:57,055 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 14:43:57,959 WARN L169 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 14:43:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 731 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-07-24 14:43:59,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:44:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 152 proven. 681 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2018-07-24 14:44:01,822 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:44:01,823 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 6] total 18 [2018-07-24 14:44:01,823 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:44:01,824 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:44:01,825 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:44:01,825 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:44:01,825 INFO L87 Difference]: Start difference. First operand 27424 states and 30488 transitions. Second operand 6 states. [2018-07-24 14:44:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:44:06,690 INFO L93 Difference]: Finished difference Result 59801 states and 66156 transitions. [2018-07-24 14:44:06,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 14:44:06,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1100 [2018-07-24 14:44:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:44:06,814 INFO L225 Difference]: With dead ends: 59801 [2018-07-24 14:44:06,815 INFO L226 Difference]: Without dead ends: 32383 [2018-07-24 14:44:06,919 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2215 GetRequests, 2194 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:44:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32383 states. [2018-07-24 14:44:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32383 to 32291. [2018-07-24 14:44:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32291 states. [2018-07-24 14:44:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32291 states to 32291 states and 35509 transitions. [2018-07-24 14:44:07,500 INFO L78 Accepts]: Start accepts. Automaton has 32291 states and 35509 transitions. Word has length 1100 [2018-07-24 14:44:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:44:07,501 INFO L471 AbstractCegarLoop]: Abstraction has 32291 states and 35509 transitions. [2018-07-24 14:44:07,501 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:44:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 32291 states and 35509 transitions. [2018-07-24 14:44:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1319 [2018-07-24 14:44:07,611 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:44:07,612 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:44:07,612 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 14:44:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1162410849, now seen corresponding path program 1 times [2018-07-24 14:44:07,612 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:44:07,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:07,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:07,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:07,614 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:44:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:08,276 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:44:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 206 proven. 1505 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-07-24 14:44:10,506 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:44:10,506 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:44:10,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:10,514 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:44:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:10,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:44:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 1619 proven. 2 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-07-24 14:44:11,998 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:44:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 423 proven. 629 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2018-07-24 14:44:13,254 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:44:13,254 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:44:13,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:13,271 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:44:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:14,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:44:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 1402 proven. 2 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-07-24 14:44:14,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:44:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 208 proven. 1298 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2018-07-24 14:44:16,772 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:44:16,774 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 14:44:16,774 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:44:16,776 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:44:16,776 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:44:16,777 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:44:16,777 INFO L87 Difference]: Start difference. First operand 32291 states and 35509 transitions. Second operand 9 states. [2018-07-24 14:44:24,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:44:24,321 INFO L93 Difference]: Finished difference Result 64273 states and 70818 transitions. [2018-07-24 14:44:24,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-07-24 14:44:24,321 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1318 [2018-07-24 14:44:24,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:44:24,423 INFO L225 Difference]: With dead ends: 64273 [2018-07-24 14:44:24,423 INFO L226 Difference]: Without dead ends: 32326 [2018-07-24 14:44:24,533 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5301 GetRequests, 5271 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2018-07-24 14:44:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32326 states. [2018-07-24 14:44:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32326 to 31285. [2018-07-24 14:44:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31285 states. [2018-07-24 14:44:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31285 states to 31285 states and 33907 transitions. [2018-07-24 14:44:25,095 INFO L78 Accepts]: Start accepts. Automaton has 31285 states and 33907 transitions. Word has length 1318 [2018-07-24 14:44:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:44:25,096 INFO L471 AbstractCegarLoop]: Abstraction has 31285 states and 33907 transitions. [2018-07-24 14:44:25,096 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:44:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 31285 states and 33907 transitions. [2018-07-24 14:44:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1341 [2018-07-24 14:44:25,146 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:44:25,147 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:44:25,148 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 14:44:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1363337045, now seen corresponding path program 1 times [2018-07-24 14:44:25,148 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:44:25,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:25,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:25,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:25,153 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:44:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 223 proven. 1564 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2018-07-24 14:44:28,695 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:44:28,695 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:44:28,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:28,836 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:44:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:29,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:44:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 1446 proven. 2 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2018-07-24 14:44:30,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:44:30,843 WARN L169 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2018-07-24 14:44:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 208 proven. 1342 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2018-07-24 14:44:34,047 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:44:34,047 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:44:34,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:34,066 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:44:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:35,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:44:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 1683 proven. 2 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-07-24 14:44:36,352 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:44:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 443 proven. 689 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2018-07-24 14:44:39,886 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:44:39,887 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 5] total 24 [2018-07-24 14:44:39,888 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:44:39,890 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 14:44:39,891 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 14:44:39,891 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2018-07-24 14:44:39,891 INFO L87 Difference]: Start difference. First operand 31285 states and 33907 transitions. Second operand 16 states. [2018-07-24 14:44:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:44:55,616 INFO L93 Difference]: Finished difference Result 79375 states and 87098 transitions. [2018-07-24 14:44:55,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 14:44:55,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1340 [2018-07-24 14:44:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:44:55,750 INFO L225 Difference]: With dead ends: 79375 [2018-07-24 14:44:55,751 INFO L226 Difference]: Without dead ends: 48434 [2018-07-24 14:44:55,850 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5449 GetRequests, 5376 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=706, Invalid=2834, Unknown=0, NotChecked=0, Total=3540 [2018-07-24 14:44:55,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48434 states. [2018-07-24 14:44:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48434 to 47930. [2018-07-24 14:44:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47930 states. [2018-07-24 14:44:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47930 states to 47930 states and 52092 transitions. [2018-07-24 14:44:56,820 INFO L78 Accepts]: Start accepts. Automaton has 47930 states and 52092 transitions. Word has length 1340 [2018-07-24 14:44:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:44:56,821 INFO L471 AbstractCegarLoop]: Abstraction has 47930 states and 52092 transitions. [2018-07-24 14:44:56,822 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 14:44:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 47930 states and 52092 transitions. [2018-07-24 14:44:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1349 [2018-07-24 14:44:56,893 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:44:56,894 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:44:56,894 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 14:44:56,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1352289339, now seen corresponding path program 1 times [2018-07-24 14:44:56,895 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:44:56,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:56,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:44:56,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:44:56,896 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:44:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:44:57,785 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 14:45:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 903 proven. 273 refuted. 0 times theorem prover too weak. 1316 trivial. 0 not checked. [2018-07-24 14:45:02,108 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:02,109 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:45:02,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:02,116 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:02,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 1703 proven. 6 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-07-24 14:45:04,492 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 206 proven. 1605 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2018-07-24 14:45:08,814 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:08,814 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:45:08,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:08,831 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:09,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 1462 proven. 6 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2018-07-24 14:45:11,767 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 208 proven. 1603 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2018-07-24 14:45:18,911 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:45:18,912 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 7, 8] total 33 [2018-07-24 14:45:18,912 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:45:18,913 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 14:45:18,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 14:45:18,914 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2018-07-24 14:45:18,914 INFO L87 Difference]: Start difference. First operand 47930 states and 52092 transitions. Second operand 18 states. [2018-07-24 14:45:24,540 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2018-07-24 14:45:25,076 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-07-24 14:45:27,983 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2018-07-24 14:45:30,917 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-07-24 14:45:31,206 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2018-07-24 14:45:34,527 WARN L169 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-07-24 14:45:34,952 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2018-07-24 14:45:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:45:35,945 INFO L93 Difference]: Finished difference Result 97382 states and 105985 transitions. [2018-07-24 14:45:35,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 14:45:35,946 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1348 [2018-07-24 14:45:35,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:45:36,086 INFO L225 Difference]: With dead ends: 97382 [2018-07-24 14:45:36,086 INFO L226 Difference]: Without dead ends: 50136 [2018-07-24 14:45:36,201 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5466 GetRequests, 5395 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=866, Invalid=3964, Unknown=0, NotChecked=0, Total=4830 [2018-07-24 14:45:36,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50136 states. [2018-07-24 14:45:36,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50136 to 49625. [2018-07-24 14:45:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49625 states. [2018-07-24 14:45:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49625 states to 49625 states and 53815 transitions. [2018-07-24 14:45:36,939 INFO L78 Accepts]: Start accepts. Automaton has 49625 states and 53815 transitions. Word has length 1348 [2018-07-24 14:45:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:45:36,940 INFO L471 AbstractCegarLoop]: Abstraction has 49625 states and 53815 transitions. [2018-07-24 14:45:36,940 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-24 14:45:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 49625 states and 53815 transitions. [2018-07-24 14:45:37,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1523 [2018-07-24 14:45:37,012 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:37,013 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:45:37,013 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 14:45:37,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1997718480, now seen corresponding path program 1 times [2018-07-24 14:45:37,013 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:37,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:37,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:37,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:37,015 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 789 proven. 336 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2018-07-24 14:45:38,978 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:38,979 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:45:38,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:38,986 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:39,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 2686 proven. 2 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2018-07-24 14:45:40,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 789 proven. 336 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2018-07-24 14:45:41,563 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:41,563 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:45:41,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:41,581 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:42,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 2686 proven. 2 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2018-07-24 14:45:43,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:45:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3963 backedges. 789 proven. 336 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2018-07-24 14:45:45,185 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:45:45,186 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 14:45:45,186 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:45:45,188 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:45:45,189 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:45:45,189 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:45:45,189 INFO L87 Difference]: Start difference. First operand 49625 states and 53815 transitions. Second operand 9 states. [2018-07-24 14:45:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:45:50,234 INFO L93 Difference]: Finished difference Result 93116 states and 100057 transitions. [2018-07-24 14:45:50,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 14:45:50,235 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1522 [2018-07-24 14:45:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:45:50,326 INFO L225 Difference]: With dead ends: 93116 [2018-07-24 14:45:50,326 INFO L226 Difference]: Without dead ends: 45867 [2018-07-24 14:45:50,443 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6104 GetRequests, 6084 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-07-24 14:45:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45867 states. [2018-07-24 14:45:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45867 to 43349. [2018-07-24 14:45:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43349 states. [2018-07-24 14:45:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43349 states to 43349 states and 45372 transitions. [2018-07-24 14:45:51,017 INFO L78 Accepts]: Start accepts. Automaton has 43349 states and 45372 transitions. Word has length 1522 [2018-07-24 14:45:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:45:51,018 INFO L471 AbstractCegarLoop]: Abstraction has 43349 states and 45372 transitions. [2018-07-24 14:45:51,018 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:45:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 43349 states and 45372 transitions. [2018-07-24 14:45:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1524 [2018-07-24 14:45:51,055 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:45:51,056 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 14:45:51,056 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:45:51,057 INFO L82 PathProgramCache]: Analyzing trace with hash -324807205, now seen corresponding path program 1 times [2018-07-24 14:45:51,057 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:45:51,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:51,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:51,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:45:51,058 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:45:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:52,718 WARN L169 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:45:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 1424 proven. 41 refuted. 0 times theorem prover too weak. 2505 trivial. 0 not checked. [2018-07-24 14:45:54,703 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:45:54,703 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 14:45:54,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:45:54,715 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:45:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:45:55,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:45:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 1463 proven. 2 refuted. 0 times theorem prover too weak. 2505 trivial. 0 not checked. [2018-07-24 14:45:56,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 1463 proven. 2 refuted. 0 times theorem prover too weak. 2505 trivial. 0 not checked. [2018-07-24 14:46:00,807 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:46:00,808 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:46:00,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:46:00,823 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:46:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:46:01,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:46:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 2690 proven. 2 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2018-07-24 14:46:03,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:46:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3970 backedges. 790 proven. 336 refuted. 0 times theorem prover too weak. 2844 trivial. 0 not checked. [2018-07-24 14:46:05,416 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:46:05,417 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 6, 5, 5] total 22 [2018-07-24 14:46:05,417 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:46:05,420 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 14:46:05,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 14:46:05,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:46:05,421 INFO L87 Difference]: Start difference. First operand 43349 states and 45372 transitions. Second operand 14 states. Received shutdown request... [2018-07-24 14:46:25,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-07-24 14:46:25,309 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:46:25,315 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:46:25,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:46:25 BoogieIcfgContainer [2018-07-24 14:46:25,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:46:25,316 INFO L168 Benchmark]: Toolchain (without parser) took 229764.12 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 666.4 MB. Max. memory is 7.1 GB. [2018-07-24 14:46:25,317 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 14:46:25,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1369.43 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 14:46:25,319 INFO L168 Benchmark]: Boogie Procedure Inliner took 213.88 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: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. [2018-07-24 14:46:25,319 INFO L168 Benchmark]: Boogie Preprocessor took 557.89 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 808.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -951.4 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. [2018-07-24 14:46:25,320 INFO L168 Benchmark]: RCFGBuilder took 6516.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 291.0 MB). Peak memory consumption was 291.0 MB. Max. memory is 7.1 GB. [2018-07-24 14:46:25,321 INFO L168 Benchmark]: TraceAbstraction took 221094.46 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.9 GB in the beginning and 3.2 GB in the end (delta: -1.3 GB). Peak memory consumption was 391.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:46:25,326 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1369.43 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 213.88 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: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 557.89 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 808.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -951.4 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6516.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 291.0 MB). Peak memory consumption was 291.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221094.46 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.9 GB in the beginning and 3.2 GB in the end (delta: -1.3 GB). Peak memory consumption was 391.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 121). Cancelled while BasicCegarLoop was constructing difference of abstraction (43349states) and interpolant automaton (currently 46 states, 14 states before enhancement), while ReachableStatesComputation was computing reachable states (67954 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 221.0s OverallTime, 15 OverallIterations, 9 TraceHistogramMax, 127.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2356 SDtfs, 35221 SDslu, 3428 SDs, 0 SdLazy, 66237 SolverSat, 8478 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 98.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32916 GetRequests, 32573 SyntacticMatches, 48 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3422 ImplicationChecksByTransitivity, 19.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49625occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 5.6s AutomataMinimizationTime, 14 MinimizatonAttempts, 5578 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 7.7s SatisfiabilityAnalysisTime, 62.4s InterpolantComputationTime, 26522 NumberOfCodeBlocks, 26522 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 42742 ConstructedInterpolants, 7 QuantifiedInterpolants, 239062607 SizeOfPredicates, 28 NumberOfNonLiveVariables, 20864 ConjunctsInSsa, 192 ConjunctsInUnsatCore, 43 InterpolantComputations, 10 PerfectInterpolantSequences, 70589/83780 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_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-46-25-340.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-46-25-340.csv Completed graceful shutdown