java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label34_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:19:46,668 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:19:46,672 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:19:46,684 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:19:46,684 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:19:46,685 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:19:46,687 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:19:46,688 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:19:46,690 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:19:46,691 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:19:46,692 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:19:46,692 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:19:46,693 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:19:46,694 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:19:46,695 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:19:46,696 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:19:46,697 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:19:46,699 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:19:46,701 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:19:46,702 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:19:46,703 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:19:46,705 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:19:46,707 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:19:46,707 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:19:46,708 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:19:46,709 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:19:46,710 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:19:46,710 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:19:46,711 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:19:46,712 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:19:46,713 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:19:46,713 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:19:46,714 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:19:46,714 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:19:46,715 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:19:46,716 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:19:46,716 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 12:19:46,731 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:19:46,732 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:19:46,732 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:19:46,733 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:19:46,733 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:19:46,733 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:19:46,733 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:19:46,734 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:19:46,734 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:19:46,734 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:19:46,734 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:19:46,735 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:19:46,735 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:19:46,735 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:19:46,736 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:19:46,736 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:19:46,737 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:19:46,737 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:19:46,737 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:19:46,737 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:19:46,737 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:19:46,738 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:19:46,738 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:19:46,738 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:19:46,738 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:19:46,739 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:19:46,740 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:19:46,740 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:19:46,740 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:19:46,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:19:46,740 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:19:46,741 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:19:46,741 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:19:46,806 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:19:46,820 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:19:46,824 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:19:46,826 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:19:46,826 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:19:46,827 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label34_true-unreach-call.c [2018-09-10 12:19:47,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ae99b89/343c2ea85cd74c3587ece91ea12b9529/FLAG0917e30cc [2018-09-10 12:19:47,500 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:19:47,501 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label34_true-unreach-call.c [2018-09-10 12:19:47,527 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ae99b89/343c2ea85cd74c3587ece91ea12b9529/FLAG0917e30cc [2018-09-10 12:19:47,550 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ae99b89/343c2ea85cd74c3587ece91ea12b9529 [2018-09-10 12:19:47,563 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:19:47,567 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:19:47,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:19:47,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:19:47,580 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:19:47,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:19:47" (1/1) ... [2018-09-10 12:19:47,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45bfc41d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:47, skipping insertion in model container [2018-09-10 12:19:47,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:19:47" (1/1) ... [2018-09-10 12:19:47,855 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:19:48,431 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:19:48,453 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:19:48,702 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:19:48,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48 WrapperNode [2018-09-10 12:19:48,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:19:48,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:19:48,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:19:48,791 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:19:48,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (1/1) ... [2018-09-10 12:19:48,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (1/1) ... [2018-09-10 12:19:48,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:19:48,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:19:48,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:19:48,959 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:19:49,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (1/1) ... [2018-09-10 12:19:49,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (1/1) ... [2018-09-10 12:19:49,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (1/1) ... [2018-09-10 12:19:49,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (1/1) ... [2018-09-10 12:19:49,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (1/1) ... [2018-09-10 12:19:49,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (1/1) ... [2018-09-10 12:19:49,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (1/1) ... [2018-09-10 12:19:49,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:19:49,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:19:49,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:19:49,442 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:19:49,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:19:49,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:19:49,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:19:49,524 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 [2018-09-10 12:19:49,524 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 [2018-09-10 12:19:49,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:19:49,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:19:49,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:19:49,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:19:49,526 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 [2018-09-10 12:19:49,526 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 [2018-09-10 12:19:54,827 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:19:54,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:19:54 BoogieIcfgContainer [2018-09-10 12:19:54,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:19:54,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:19:54,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:19:54,834 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:19:54,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:19:47" (1/3) ... [2018-09-10 12:19:54,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a06ac04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:19:54, skipping insertion in model container [2018-09-10 12:19:54,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:19:48" (2/3) ... [2018-09-10 12:19:54,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a06ac04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:19:54, skipping insertion in model container [2018-09-10 12:19:54,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:19:54" (3/3) ... [2018-09-10 12:19:54,838 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label34_true-unreach-call.c [2018-09-10 12:19:54,849 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:19:54,859 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:19:54,919 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:19:54,919 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:19:54,920 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:19:54,920 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:19:54,920 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:19:54,920 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:19:54,920 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:19:54,920 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:19:54,921 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:19:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-09-10 12:19:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-10 12:19:54,964 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:19:54,965 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:19:54,967 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:19:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1571804519, now seen corresponding path program 1 times [2018-09-10 12:19:54,976 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:19:55,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:55,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:19:55,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:19:55,027 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:19:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:19:55,442 WARN L175 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:19:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:19:55,491 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:19:55,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:19:55,492 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:19:55,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:19:55,514 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:19:55,515 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:19:55,518 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-09-10 12:20:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:00,390 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-09-10 12:20:00,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:20:00,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2018-09-10 12:20:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:00,442 INFO L225 Difference]: With dead ends: 1156 [2018-09-10 12:20:00,443 INFO L226 Difference]: Without dead ends: 744 [2018-09-10 12:20:00,456 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:20:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-09-10 12:20:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-09-10 12:20:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-09-10 12:20:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1329 transitions. [2018-09-10 12:20:00,581 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1329 transitions. Word has length 41 [2018-09-10 12:20:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:00,582 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1329 transitions. [2018-09-10 12:20:00,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:20:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1329 transitions. [2018-09-10 12:20:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-10 12:20:00,595 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:00,596 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:20:00,596 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:00,597 INFO L82 PathProgramCache]: Analyzing trace with hash -563813770, now seen corresponding path program 1 times [2018-09-10 12:20:00,597 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:00,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:00,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:00,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:00,600 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:20:01,016 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:20:01,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:20:01,016 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:20:01,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:20:01,019 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:20:01,019 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:20:01,019 INFO L87 Difference]: Start difference. First operand 744 states and 1329 transitions. Second operand 6 states. [2018-09-10 12:20:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:07,980 INFO L93 Difference]: Finished difference Result 2185 states and 3967 transitions. [2018-09-10 12:20:07,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:20:07,981 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2018-09-10 12:20:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:07,991 INFO L225 Difference]: With dead ends: 2185 [2018-09-10 12:20:07,992 INFO L226 Difference]: Without dead ends: 1447 [2018-09-10 12:20:07,995 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:20:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2018-09-10 12:20:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1442. [2018-09-10 12:20:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2018-09-10 12:20:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2383 transitions. [2018-09-10 12:20:08,055 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2383 transitions. Word has length 149 [2018-09-10 12:20:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:08,056 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 2383 transitions. [2018-09-10 12:20:08,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:20:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2383 transitions. [2018-09-10 12:20:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-09-10 12:20:08,064 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:08,064 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:20:08,065 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash 568869987, now seen corresponding path program 1 times [2018-09-10 12:20:08,065 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:08,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:08,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:08,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:08,067 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:08,342 WARN L175 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:20:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 68 proven. 103 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:20:08,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:08,423 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:20:08,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:08,435 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:08,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-10 12:20:09,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 68 proven. 103 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:20:09,491 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:20:09,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 12:20:09,492 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:20:09,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:20:09,493 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:20:09,494 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:20:09,494 INFO L87 Difference]: Start difference. First operand 1442 states and 2383 transitions. Second operand 5 states. [2018-09-10 12:20:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:20,511 INFO L93 Difference]: Finished difference Result 5457 states and 8975 transitions. [2018-09-10 12:20:20,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:20:20,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2018-09-10 12:20:20,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:20,543 INFO L225 Difference]: With dead ends: 5457 [2018-09-10 12:20:20,543 INFO L226 Difference]: Without dead ends: 4021 [2018-09-10 12:20:20,556 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 525 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:20:20,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2018-09-10 12:20:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3999. [2018-09-10 12:20:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3999 states. [2018-09-10 12:20:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 5628 transitions. [2018-09-10 12:20:20,683 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 5628 transitions. Word has length 265 [2018-09-10 12:20:20,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:20,684 INFO L480 AbstractCegarLoop]: Abstraction has 3999 states and 5628 transitions. [2018-09-10 12:20:20,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:20:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 5628 transitions. [2018-09-10 12:20:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-09-10 12:20:20,695 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:20,696 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:20:20,696 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:20,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1555003733, now seen corresponding path program 1 times [2018-09-10 12:20:20,697 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:20,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:20,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:20,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:20,698 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:21,121 WARN L175 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:20:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 108 proven. 232 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-10 12:20:21,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:21,696 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 12:20:21,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:21,718 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:21,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 375 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-10 12:20:22,363 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 206 proven. 107 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-10 12:20:23,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:23,246 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-10 12:20:23,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:23,273 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:23,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 375 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-09-10 12:20:23,786 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 206 proven. 107 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-10 12:20:24,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:20:24,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-10 12:20:24,064 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:20:24,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:20:24,066 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:20:24,066 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:20:24,066 INFO L87 Difference]: Start difference. First operand 3999 states and 5628 transitions. Second operand 9 states. [2018-09-10 12:20:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:32,445 INFO L93 Difference]: Finished difference Result 11046 states and 16300 transitions. [2018-09-10 12:20:32,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-10 12:20:32,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 366 [2018-09-10 12:20:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:32,490 INFO L225 Difference]: With dead ends: 11046 [2018-09-10 12:20:32,491 INFO L226 Difference]: Without dead ends: 7053 [2018-09-10 12:20:32,532 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1515 GetRequests, 1476 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-09-10 12:20:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7053 states. [2018-09-10 12:20:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7053 to 6988. [2018-09-10 12:20:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6988 states. [2018-09-10 12:20:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6988 states to 6988 states and 9146 transitions. [2018-09-10 12:20:32,736 INFO L78 Accepts]: Start accepts. Automaton has 6988 states and 9146 transitions. Word has length 366 [2018-09-10 12:20:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:32,737 INFO L480 AbstractCegarLoop]: Abstraction has 6988 states and 9146 transitions. [2018-09-10 12:20:32,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:20:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 6988 states and 9146 transitions. [2018-09-10 12:20:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2018-09-10 12:20:32,785 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:32,786 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:20:32,786 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash -287329659, now seen corresponding path program 1 times [2018-09-10 12:20:32,787 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:32,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:32,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:32,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:32,789 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 522 proven. 115 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-09-10 12:20:34,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:34,064 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:20:34,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:34,072 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:34,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2018-09-10 12:20:35,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 522 proven. 115 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-09-10 12:20:35,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:35,805 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:20:35,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:35,821 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:36,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2018-09-10 12:20:36,836 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 522 proven. 115 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-09-10 12:20:37,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:20:37,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:20:37,378 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:20:37,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:20:37,380 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:20:37,381 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:20:37,382 INFO L87 Difference]: Start difference. First operand 6988 states and 9146 transitions. Second operand 9 states. [2018-09-10 12:20:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:20:44,543 INFO L93 Difference]: Finished difference Result 14680 states and 19999 transitions. [2018-09-10 12:20:44,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:20:44,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 790 [2018-09-10 12:20:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:20:44,585 INFO L225 Difference]: With dead ends: 14680 [2018-09-10 12:20:44,585 INFO L226 Difference]: Without dead ends: 7698 [2018-09-10 12:20:44,635 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3176 GetRequests, 3156 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:20:44,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7698 states. [2018-09-10 12:20:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7698 to 7687. [2018-09-10 12:20:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7687 states. [2018-09-10 12:20:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 9849 transitions. [2018-09-10 12:20:44,806 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 9849 transitions. Word has length 790 [2018-09-10 12:20:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:20:44,807 INFO L480 AbstractCegarLoop]: Abstraction has 7687 states and 9849 transitions. [2018-09-10 12:20:44,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:20:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 9849 transitions. [2018-09-10 12:20:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 799 [2018-09-10 12:20:44,857 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:44,857 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:20:44,858 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:44,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1343703118, now seen corresponding path program 1 times [2018-09-10 12:20:44,858 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:44,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:44,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:44,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:44,860 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-09-10 12:20:45,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:45,850 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:20:45,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:45,858 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:46,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-09-10 12:20:46,614 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-09-10 12:20:47,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:20:47,314 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:20:47,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:47,329 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:20:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:47,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:20:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-09-10 12:20:48,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:20:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-09-10 12:20:49,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:20:49,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-10 12:20:49,077 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:20:49,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:20:49,078 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:20:49,078 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:20:49,079 INFO L87 Difference]: Start difference. First operand 7687 states and 9849 transitions. Second operand 9 states. [2018-09-10 12:21:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:02,348 INFO L93 Difference]: Finished difference Result 23558 states and 31631 transitions. [2018-09-10 12:21:02,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-10 12:21:02,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 798 [2018-09-10 12:21:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:02,482 INFO L225 Difference]: With dead ends: 23558 [2018-09-10 12:21:02,483 INFO L226 Difference]: Without dead ends: 12719 [2018-09-10 12:21:02,594 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3265 GetRequests, 3212 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=566, Invalid=2296, Unknown=0, NotChecked=0, Total=2862 [2018-09-10 12:21:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12719 states. [2018-09-10 12:21:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12719 to 12683. [2018-09-10 12:21:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12683 states. [2018-09-10 12:21:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12683 states to 12683 states and 14269 transitions. [2018-09-10 12:21:02,946 INFO L78 Accepts]: Start accepts. Automaton has 12683 states and 14269 transitions. Word has length 798 [2018-09-10 12:21:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:02,948 INFO L480 AbstractCegarLoop]: Abstraction has 12683 states and 14269 transitions. [2018-09-10 12:21:02,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:21:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 12683 states and 14269 transitions. [2018-09-10 12:21:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1073 [2018-09-10 12:21:02,994 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:02,995 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:02,995 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:02,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1272565509, now seen corresponding path program 1 times [2018-09-10 12:21:02,996 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:02,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:02,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:02,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:02,998 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:04,264 WARN L175 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-10 12:21:04,723 WARN L175 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-09-10 12:21:04,972 WARN L175 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-09-10 12:21:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 854 proven. 175 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-09-10 12:21:07,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:07,663 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:21:07,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:07,670 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:07,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-09-10 12:21:08,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-09-10 12:21:09,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:09,342 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:21:09,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:09,358 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:10,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-09-10 12:21:10,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-09-10 12:21:11,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:21:11,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 5, 5] total 22 [2018-09-10 12:21:11,576 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:21:11,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 12:21:11,578 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 12:21:11,578 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:21:11,579 INFO L87 Difference]: Start difference. First operand 12683 states and 14269 transitions. Second operand 16 states. [2018-09-10 12:21:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:21,381 INFO L93 Difference]: Finished difference Result 27449 states and 30896 transitions. [2018-09-10 12:21:21,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-10 12:21:21,381 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1072 [2018-09-10 12:21:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:21,456 INFO L225 Difference]: With dead ends: 27449 [2018-09-10 12:21:21,457 INFO L226 Difference]: Without dead ends: 14772 [2018-09-10 12:21:21,527 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4364 GetRequests, 4305 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2018-09-10 12:21:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14772 states. [2018-09-10 12:21:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14772 to 14734. [2018-09-10 12:21:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14734 states. [2018-09-10 12:21:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14734 states to 14734 states and 16181 transitions. [2018-09-10 12:21:21,844 INFO L78 Accepts]: Start accepts. Automaton has 14734 states and 16181 transitions. Word has length 1072 [2018-09-10 12:21:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:21,846 INFO L480 AbstractCegarLoop]: Abstraction has 14734 states and 16181 transitions. [2018-09-10 12:21:21,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 12:21:21,846 INFO L276 IsEmpty]: Start isEmpty. Operand 14734 states and 16181 transitions. [2018-09-10 12:21:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1074 [2018-09-10 12:21:21,893 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:21,894 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:21,894 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:21,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2002526148, now seen corresponding path program 1 times [2018-09-10 12:21:21,895 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:21,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:21,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:21,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:21,896 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-09-10 12:21:23,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:23,576 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:21:23,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:23,586 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:23,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-09-10 12:21:24,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-09-10 12:21:25,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:25,168 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:21:25,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:25,184 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:25,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-09-10 12:21:26,672 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-09-10 12:21:27,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:21:27,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:21:27,369 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:21:27,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:21:27,371 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:21:27,371 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:21:27,371 INFO L87 Difference]: Start difference. First operand 14734 states and 16181 transitions. Second operand 9 states. [2018-09-10 12:21:33,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:33,769 INFO L93 Difference]: Finished difference Result 30134 states and 32932 transitions. [2018-09-10 12:21:33,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-10 12:21:33,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1073 [2018-09-10 12:21:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:33,824 INFO L225 Difference]: With dead ends: 30134 [2018-09-10 12:21:33,824 INFO L226 Difference]: Without dead ends: 12650 [2018-09-10 12:21:33,878 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4318 GetRequests, 4292 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-09-10 12:21:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12650 states. [2018-09-10 12:21:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12650 to 12520. [2018-09-10 12:21:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12520 states. [2018-09-10 12:21:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12520 states to 12520 states and 13155 transitions. [2018-09-10 12:21:34,098 INFO L78 Accepts]: Start accepts. Automaton has 12520 states and 13155 transitions. Word has length 1073 [2018-09-10 12:21:34,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:34,100 INFO L480 AbstractCegarLoop]: Abstraction has 12520 states and 13155 transitions. [2018-09-10 12:21:34,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:21:34,100 INFO L276 IsEmpty]: Start isEmpty. Operand 12520 states and 13155 transitions. [2018-09-10 12:21:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2018-09-10 12:21:34,141 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:34,142 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:34,142 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:34,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1357035898, now seen corresponding path program 1 times [2018-09-10 12:21:34,143 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:34,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:34,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:34,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:34,144 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:35,055 WARN L175 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-09-10 12:21:35,647 WARN L175 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-09-10 12:21:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 821 proven. 254 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-09-10 12:21:38,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:38,974 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:21:38,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:38,981 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:39,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 2146 trivial. 0 not checked. [2018-09-10 12:21:40,212 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 2146 trivial. 0 not checked. [2018-09-10 12:21:40,759 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:21:40,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [12] total 13 [2018-09-10 12:21:40,760 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:21:40,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:21:40,761 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:21:40,761 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:21:40,761 INFO L87 Difference]: Start difference. First operand 12520 states and 13155 transitions. Second operand 3 states. [2018-09-10 12:21:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:42,137 INFO L93 Difference]: Finished difference Result 23386 states and 24572 transitions. [2018-09-10 12:21:42,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:21:42,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1160 [2018-09-10 12:21:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:42,172 INFO L225 Difference]: With dead ends: 23386 [2018-09-10 12:21:42,173 INFO L226 Difference]: Without dead ends: 12520 [2018-09-10 12:21:42,195 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2331 GetRequests, 2318 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:21:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12520 states. [2018-09-10 12:21:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12520 to 12231. [2018-09-10 12:21:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12231 states. [2018-09-10 12:21:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12231 states to 12231 states and 12817 transitions. [2018-09-10 12:21:42,372 INFO L78 Accepts]: Start accepts. Automaton has 12231 states and 12817 transitions. Word has length 1160 [2018-09-10 12:21:42,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:42,373 INFO L480 AbstractCegarLoop]: Abstraction has 12231 states and 12817 transitions. [2018-09-10 12:21:42,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:21:42,373 INFO L276 IsEmpty]: Start isEmpty. Operand 12231 states and 12817 transitions. [2018-09-10 12:21:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1414 [2018-09-10 12:21:42,414 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:42,415 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:42,416 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1368620095, now seen corresponding path program 1 times [2018-09-10 12:21:42,416 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:42,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:42,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:42,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:42,418 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:43,691 WARN L175 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 12:21:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 868 proven. 247 refuted. 0 times theorem prover too weak. 2869 trivial. 0 not checked. [2018-09-10 12:21:44,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:44,912 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 12:21:44,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:44,920 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:45,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 734 proven. 0 refuted. 0 times theorem prover too weak. 3250 trivial. 0 not checked. [2018-09-10 12:21:46,088 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 272 proven. 672 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2018-09-10 12:21:47,200 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:21:47,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-09-10 12:21:47,201 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:21:47,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:21:47,202 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:21:47,202 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-09-10 12:21:47,202 INFO L87 Difference]: Start difference. First operand 12231 states and 12817 transitions. Second operand 5 states. [2018-09-10 12:21:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:50,819 INFO L93 Difference]: Finished difference Result 37253 states and 39193 transitions. [2018-09-10 12:21:50,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:21:50,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1413 [2018-09-10 12:21:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:50,889 INFO L225 Difference]: With dead ends: 37253 [2018-09-10 12:21:50,889 INFO L226 Difference]: Without dead ends: 24724 [2018-09-10 12:21:50,927 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2843 GetRequests, 2825 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:21:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24724 states. [2018-09-10 12:21:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24724 to 23025. [2018-09-10 12:21:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23025 states. [2018-09-10 12:21:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23025 states to 23025 states and 24168 transitions. [2018-09-10 12:21:51,282 INFO L78 Accepts]: Start accepts. Automaton has 23025 states and 24168 transitions. Word has length 1413 [2018-09-10 12:21:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:51,283 INFO L480 AbstractCegarLoop]: Abstraction has 23025 states and 24168 transitions. [2018-09-10 12:21:51,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:21:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 23025 states and 24168 transitions. [2018-09-10 12:21:51,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1640 [2018-09-10 12:21:51,366 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:51,367 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:51,368 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash 384494025, now seen corresponding path program 1 times [2018-09-10 12:21:51,369 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:51,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:51,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:51,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:51,370 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:52,641 WARN L175 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 12:21:52,992 WARN L175 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 12:21:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 1068 proven. 588 refuted. 0 times theorem prover too weak. 3353 trivial. 0 not checked. [2018-09-10 12:21:55,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:55,392 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:21:55,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:55,403 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:55,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:56,345 WARN L175 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-10 12:21:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 2314 proven. 2 refuted. 0 times theorem prover too weak. 2693 trivial. 0 not checked. [2018-09-10 12:21:57,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 303 proven. 2193 refuted. 0 times theorem prover too weak. 2513 trivial. 0 not checked. [2018-09-10 12:22:01,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:01,426 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:22:01,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:01,442 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:02,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 3493 proven. 14 refuted. 0 times theorem prover too weak. 1502 trivial. 0 not checked. [2018-09-10 12:22:04,017 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 1068 proven. 588 refuted. 0 times theorem prover too weak. 3353 trivial. 0 not checked. [2018-09-10 12:22:08,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:22:08,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 6, 5] total 23 [2018-09-10 12:22:08,022 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:22:08,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-10 12:22:08,024 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-10 12:22:08,024 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2018-09-10 12:22:08,025 INFO L87 Difference]: Start difference. First operand 23025 states and 24168 transitions. Second operand 14 states. [2018-09-10 12:22:22,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:22:22,525 INFO L93 Difference]: Finished difference Result 49471 states and 51961 transitions. [2018-09-10 12:22:22,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-10 12:22:22,525 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1639 [2018-09-10 12:22:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:22:22,623 INFO L225 Difference]: With dead ends: 49471 [2018-09-10 12:22:22,623 INFO L226 Difference]: Without dead ends: 25874 [2018-09-10 12:22:22,700 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6617 GetRequests, 6562 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=427, Invalid=2123, Unknown=0, NotChecked=0, Total=2550 [2018-09-10 12:22:22,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2018-09-10 12:22:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 23396. [2018-09-10 12:22:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23396 states. [2018-09-10 12:22:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23396 states to 23396 states and 24499 transitions. [2018-09-10 12:22:23,124 INFO L78 Accepts]: Start accepts. Automaton has 23396 states and 24499 transitions. Word has length 1639 [2018-09-10 12:22:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:22:23,125 INFO L480 AbstractCegarLoop]: Abstraction has 23396 states and 24499 transitions. [2018-09-10 12:22:23,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-10 12:22:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 23396 states and 24499 transitions. [2018-09-10 12:22:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1835 [2018-09-10 12:22:23,216 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:22:23,217 INFO L376 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:22:23,217 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:22:23,218 INFO L82 PathProgramCache]: Analyzing trace with hash -149899618, now seen corresponding path program 1 times [2018-09-10 12:22:23,218 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:22:23,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:23,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:23,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:23,219 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:22:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 938 proven. 676 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2018-09-10 12:22:25,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:25,316 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:22:25,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:25,326 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:25,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 4094 proven. 2 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2018-09-10 12:22:27,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 938 proven. 676 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2018-09-10 12:22:29,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:29,308 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:22:29,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:29,328 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:30,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 4094 proven. 2 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2018-09-10 12:22:31,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 938 proven. 676 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2018-09-10 12:22:34,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:22:34,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:22:34,048 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:22:34,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:22:34,049 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:22:34,050 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:22:34,050 INFO L87 Difference]: Start difference. First operand 23396 states and 24499 transitions. Second operand 9 states. [2018-09-10 12:22:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:22:38,571 INFO L93 Difference]: Finished difference Result 43929 states and 46331 transitions. [2018-09-10 12:22:38,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:22:38,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1834 [2018-09-10 12:22:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:22:38,663 INFO L225 Difference]: With dead ends: 43929 [2018-09-10 12:22:38,663 INFO L226 Difference]: Without dead ends: 23201 [2018-09-10 12:22:38,729 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7358 GetRequests, 7337 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:22:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23201 states. [2018-09-10 12:22:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23201 to 22706. [2018-09-10 12:22:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22706 states. [2018-09-10 12:22:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22706 states to 22706 states and 23581 transitions. [2018-09-10 12:22:39,164 INFO L78 Accepts]: Start accepts. Automaton has 22706 states and 23581 transitions. Word has length 1834 [2018-09-10 12:22:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:22:39,165 INFO L480 AbstractCegarLoop]: Abstraction has 22706 states and 23581 transitions. [2018-09-10 12:22:39,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:22:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 22706 states and 23581 transitions. [2018-09-10 12:22:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1943 [2018-09-10 12:22:39,260 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:22:39,262 INFO L376 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:22:39,262 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:22:39,263 INFO L82 PathProgramCache]: Analyzing trace with hash 402522256, now seen corresponding path program 1 times [2018-09-10 12:22:39,263 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:22:39,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:39,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:39,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:39,264 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:22:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2775 proven. 1492 refuted. 0 times theorem prover too weak. 2789 trivial. 0 not checked. [2018-09-10 12:22:46,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:46,141 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:22:46,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:46,150 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:46,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3907 proven. 2 refuted. 0 times theorem prover too weak. 3147 trivial. 0 not checked. [2018-09-10 12:22:48,310 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:49,000 WARN L175 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-09-10 12:22:49,154 WARN L175 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-10 12:22:49,657 WARN L175 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-09-10 12:22:49,879 WARN L175 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-10 12:22:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 1713 proven. 336 refuted. 0 times theorem prover too weak. 5007 trivial. 0 not checked. [2018-09-10 12:22:52,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:52,858 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:22:52,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:52,875 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:54,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 4248 proven. 2 refuted. 0 times theorem prover too weak. 2806 trivial. 0 not checked. [2018-09-10 12:22:56,044 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:56,410 WARN L175 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 12:22:56,579 WARN L175 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 12:22:56,876 WARN L175 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-09-10 12:22:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 866 proven. 567 refuted. 0 times theorem prover too weak. 5623 trivial. 0 not checked. [2018-09-10 12:22:59,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:22:59,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 5, 5] total 25 [2018-09-10 12:22:59,341 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:22:59,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-10 12:22:59,343 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-10 12:22:59,344 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-09-10 12:22:59,344 INFO L87 Difference]: Start difference. First operand 22706 states and 23581 transitions. Second operand 19 states. [2018-09-10 12:23:01,001 WARN L175 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-09-10 12:23:04,858 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-09-10 12:23:09,894 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2018-09-10 12:23:11,682 WARN L175 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-09-10 12:23:12,997 WARN L175 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2018-09-10 12:23:14,171 WARN L175 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-09-10 12:23:14,398 WARN L175 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2018-09-10 12:23:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:23:14,842 INFO L93 Difference]: Finished difference Result 42116 states and 43917 transitions. [2018-09-10 12:23:14,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-10 12:23:14,843 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1942 [2018-09-10 12:23:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:23:14,896 INFO L225 Difference]: With dead ends: 42116 [2018-09-10 12:23:14,897 INFO L226 Difference]: Without dead ends: 23136 [2018-09-10 12:23:14,933 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7880 GetRequests, 7798 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1051, Invalid=5269, Unknown=0, NotChecked=0, Total=6320 [2018-09-10 12:23:14,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2018-09-10 12:23:15,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 22029. [2018-09-10 12:23:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22029 states. [2018-09-10 12:23:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22029 states to 22029 states and 22798 transitions. [2018-09-10 12:23:15,216 INFO L78 Accepts]: Start accepts. Automaton has 22029 states and 22798 transitions. Word has length 1942 [2018-09-10 12:23:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:23:15,218 INFO L480 AbstractCegarLoop]: Abstraction has 22029 states and 22798 transitions. [2018-09-10 12:23:15,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-10 12:23:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22029 states and 22798 transitions. [2018-09-10 12:23:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1973 [2018-09-10 12:23:15,285 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:23:15,286 INFO L376 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:23:15,287 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:23:15,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1486303465, now seen corresponding path program 1 times [2018-09-10 12:23:15,287 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:23:15,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:23:15,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:15,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:23:15,288 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:23:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 3456 proven. 557 refuted. 0 times theorem prover too weak. 4315 trivial. 0 not checked. [2018-09-10 12:23:19,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:23:19,173 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:23:19,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:19,182 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:23:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:19,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:23:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 5765 proven. 6 refuted. 0 times theorem prover too weak. 2557 trivial. 0 not checked. [2018-09-10 12:23:21,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:23:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 1720 proven. 1099 refuted. 0 times theorem prover too weak. 5509 trivial. 0 not checked. [2018-09-10 12:23:25,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:23:25,035 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:23:25,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:25,053 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:23:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:26,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:23:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 5033 proven. 872 refuted. 0 times theorem prover too weak. 2423 trivial. 0 not checked. [2018-09-10 12:23:28,349 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:23:28,946 WARN L175 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-10 12:23:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 1581 proven. 549 refuted. 0 times theorem prover too weak. 6198 trivial. 0 not checked. [2018-09-10 12:23:33,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:23:33,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 7, 5] total 32 [2018-09-10 12:23:33,014 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:23:33,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-10 12:23:33,016 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-10 12:23:33,017 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2018-09-10 12:23:33,017 INFO L87 Difference]: Start difference. First operand 22029 states and 22798 transitions. Second operand 20 states. Received shutdown request... [2018-09-10 12:23:35,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:23:35,147 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:23:35,153 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:23:35,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:23:35 BoogieIcfgContainer [2018-09-10 12:23:35,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:23:35,154 INFO L168 Benchmark]: Toolchain (without parser) took 227590.26 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -817.7 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-09-10 12:23:35,155 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:23:35,156 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1219.76 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-09-10 12:23:35,157 INFO L168 Benchmark]: Boogie Procedure Inliner took 168.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-10 12:23:35,157 INFO L168 Benchmark]: Boogie Preprocessor took 482.70 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 829.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -977.1 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2018-09-10 12:23:35,158 INFO L168 Benchmark]: RCFGBuilder took 5387.30 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 287.8 MB). Peak memory consumption was 287.8 MB. Max. memory is 7.1 GB. [2018-09-10 12:23:35,159 INFO L168 Benchmark]: TraceAbstraction took 220323.42 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -255.2 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-09-10 12:23:35,163 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1219.76 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 168.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 482.70 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 829.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -977.1 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5387.30 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 287.8 MB). Peak memory consumption was 287.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220323.42 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.2 GB in the end (delta: -255.2 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 109). Cancelled while BasicCegarLoop was constructing difference of abstraction (22029states) and FLOYD_HOARE automaton (currently 7 states, 20 states before enhancement), while ReachableStatesComputation was computing reachable states (313 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 220.2s OverallTime, 14 OverallIterations, 12 TraceHistogramMax, 110.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1889 SDtfs, 35164 SDslu, 3521 SDs, 0 SdLazy, 72217 SolverSat, 10186 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 83.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52133 GetRequests, 51686 SyntacticMatches, 39 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4984 ImplicationChecksByTransitivity, 22.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23396occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 6375 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 12.0s SatisfiabilityAnalysisTime, 72.3s InterpolantComputationTime, 40324 NumberOfCodeBlocks, 40324 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 66078 ConstructedInterpolants, 7 QuantifiedInterpolants, 253268894 SizeOfPredicates, 14 NumberOfNonLiveVariables, 34045 ConjunctsInSsa, 171 ConjunctsInUnsatCore, 56 InterpolantComputations, 6 PerfectInterpolantSequences, 184689/197969 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label34_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-23-35-177.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label34_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-23-35-177.csv Completed graceful shutdown