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-ddc4263 [2018-08-07 12:56:02,570 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:56:02,572 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:56:02,589 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:56:02,589 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:56:02,591 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:56:02,593 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:56:02,595 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:56:02,597 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:56:02,599 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:56:02,602 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:56:02,602 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:56:02,603 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:56:02,604 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:56:02,606 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:56:02,607 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:56:02,612 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:56:02,615 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:56:02,617 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:56:02,619 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:56:02,622 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:56:02,623 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:56:02,626 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 12:56:02,626 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 12:56:02,626 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 12:56:02,629 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 12:56:02,630 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 12:56:02,630 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 12:56:02,631 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 12:56:02,634 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 12:56:02,634 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 12:56:02,635 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 12:56:02,636 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 12:56:02,636 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 12:56:02,637 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 12:56:02,638 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 12:56:02,638 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 [2018-08-07 12:56:02,662 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:56:02,662 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:56:02,663 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:56:02,663 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:56:02,664 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:56:02,664 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:56:02,664 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:56:02,664 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:56:02,665 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:56:02,665 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:56:02,665 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:56:02,666 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:56:02,666 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:56:02,666 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:56:02,666 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:56:02,667 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:56:02,667 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:56:02,667 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:56:02,667 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:56:02,669 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:56:02,669 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:56:02,669 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:56:02,669 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:56:02,670 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:56:02,670 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:56:02,670 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:56:02,670 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:56:02,670 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:56:02,671 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:56:02,671 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:56:02,671 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:56:02,671 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:56:02,671 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:56:02,719 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:56:02,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:56:02,740 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:56:02,742 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:56:02,742 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:56:02,743 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label34_true-unreach-call.c [2018-08-07 12:56:03,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2381fd566/80cac4cb8cb9476b8c40e3d07d87a4e3/FLAG486e7fbf4 [2018-08-07 12:56:03,500 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:56:03,501 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label34_true-unreach-call.c [2018-08-07 12:56:03,521 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2381fd566/80cac4cb8cb9476b8c40e3d07d87a4e3/FLAG486e7fbf4 [2018-08-07 12:56:03,537 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2381fd566/80cac4cb8cb9476b8c40e3d07d87a4e3 [2018-08-07 12:56:03,549 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:56:03,551 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:56:03,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:56:03,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:56:03,561 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:56:03,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:56:03" (1/1) ... [2018-08-07 12:56:03,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@499bc742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:03, skipping insertion in model container [2018-08-07 12:56:03,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:56:03" (1/1) ... [2018-08-07 12:56:03,797 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:56:04,351 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:56:04,368 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:56:04,631 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:56:04,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04 WrapperNode [2018-08-07 12:56:04,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:56:04,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:56:04,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:56:04,741 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:56:04,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (1/1) ... [2018-08-07 12:56:04,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (1/1) ... [2018-08-07 12:56:04,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:56:04,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:56:04,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:56:04,967 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:56:05,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (1/1) ... [2018-08-07 12:56:05,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (1/1) ... [2018-08-07 12:56:05,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (1/1) ... [2018-08-07 12:56:05,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (1/1) ... [2018-08-07 12:56:05,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (1/1) ... [2018-08-07 12:56:05,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (1/1) ... [2018-08-07 12:56:05,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (1/1) ... [2018-08-07 12:56:05,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:56:05,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:56:05,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:56:05,445 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:56:05,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (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 [2018-08-07 12:56:05,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:56:05,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:56:05,531 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 [2018-08-07 12:56:05,531 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 [2018-08-07 12:56:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:56:05,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:56:05,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:56:05,532 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:56:05,532 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 [2018-08-07 12:56:05,533 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 [2018-08-07 12:56:11,641 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:56:11,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:56:11 BoogieIcfgContainer [2018-08-07 12:56:11,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:56:11,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:56:11,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:56:11,647 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:56:11,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:56:03" (1/3) ... [2018-08-07 12:56:11,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ecafaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:56:11, skipping insertion in model container [2018-08-07 12:56:11,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:56:04" (2/3) ... [2018-08-07 12:56:11,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ecafaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:56:11, skipping insertion in model container [2018-08-07 12:56:11,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:56:11" (3/3) ... [2018-08-07 12:56:11,652 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label34_true-unreach-call.c [2018-08-07 12:56:11,661 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:56:11,671 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:56:11,742 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:56:11,743 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:56:11,743 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:56:11,743 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:56:11,743 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:56:11,744 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:56:11,744 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:56:11,744 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:56:11,744 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:56:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-08-07 12:56:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-08-07 12:56:11,804 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:56:11,805 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] [2018-08-07 12:56:11,807 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]=== [2018-08-07 12:56:11,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1571804519, now seen corresponding path program 1 times [2018-08-07 12:56:11,815 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:56:11,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:11,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:11,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:11,867 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:56:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:12,264 WARN L170 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:56:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:56:12,297 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:56:12,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 12:56:12,298 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:56:12,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:56:12,320 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:56:12,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:56:12,323 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-08-07 12:56:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:56:17,266 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-08-07 12:56:17,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:56:17,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2018-08-07 12:56:17,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:56:17,298 INFO L225 Difference]: With dead ends: 1156 [2018-08-07 12:56:17,298 INFO L226 Difference]: Without dead ends: 744 [2018-08-07 12:56:17,309 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:56:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-08-07 12:56:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-08-07 12:56:17,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-08-07 12:56:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1329 transitions. [2018-08-07 12:56:17,429 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1329 transitions. Word has length 41 [2018-08-07 12:56:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:56:17,430 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1329 transitions. [2018-08-07 12:56:17,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:56:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1329 transitions. [2018-08-07 12:56:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-08-07 12:56:17,444 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:56:17,444 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] [2018-08-07 12:56:17,445 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]=== [2018-08-07 12:56:17,445 INFO L82 PathProgramCache]: Analyzing trace with hash -563813770, now seen corresponding path program 1 times [2018-08-07 12:56:17,445 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:56:17,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:17,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:17,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:17,448 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:56:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:56:17,843 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:56:17,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:56:17,843 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:56:17,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:56:17,845 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:56:17,846 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:56:17,846 INFO L87 Difference]: Start difference. First operand 744 states and 1329 transitions. Second operand 6 states. [2018-08-07 12:56:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:56:23,818 INFO L93 Difference]: Finished difference Result 2185 states and 3967 transitions. [2018-08-07 12:56:23,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:56:23,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2018-08-07 12:56:23,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:56:23,830 INFO L225 Difference]: With dead ends: 2185 [2018-08-07 12:56:23,830 INFO L226 Difference]: Without dead ends: 1447 [2018-08-07 12:56:23,835 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:56:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2018-08-07 12:56:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1442. [2018-08-07 12:56:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2018-08-07 12:56:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2383 transitions. [2018-08-07 12:56:23,907 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2383 transitions. Word has length 149 [2018-08-07 12:56:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:56:23,908 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 2383 transitions. [2018-08-07 12:56:23,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:56:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2383 transitions. [2018-08-07 12:56:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-08-07 12:56:23,916 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:56:23,917 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] [2018-08-07 12:56:23,917 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]=== [2018-08-07 12:56:23,918 INFO L82 PathProgramCache]: Analyzing trace with hash 568869987, now seen corresponding path program 1 times [2018-08-07 12:56:23,918 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:56:23,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:23,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:23,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:23,920 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:56:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 68 proven. 103 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:56:24,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:24,315 INFO L194 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 [2018-08-07 12:56:24,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:24,327 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:24,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-08-07 12:56:25,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 68 proven. 103 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:56:25,865 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:56:25,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-08-07 12:56:25,866 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:56:25,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:56:25,867 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:56:25,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:56:25,867 INFO L87 Difference]: Start difference. First operand 1442 states and 2383 transitions. Second operand 5 states. [2018-08-07 12:56:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:56:38,866 INFO L93 Difference]: Finished difference Result 5457 states and 8975 transitions. [2018-08-07 12:56:38,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:56:38,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2018-08-07 12:56:38,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:56:38,908 INFO L225 Difference]: With dead ends: 5457 [2018-08-07 12:56:38,908 INFO L226 Difference]: Without dead ends: 4021 [2018-08-07 12:56:38,923 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 525 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-08-07 12:56:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2018-08-07 12:56:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3999. [2018-08-07 12:56:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3999 states. [2018-08-07 12:56:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 5628 transitions. [2018-08-07 12:56:39,050 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 5628 transitions. Word has length 265 [2018-08-07 12:56:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:56:39,051 INFO L480 AbstractCegarLoop]: Abstraction has 3999 states and 5628 transitions. [2018-08-07 12:56:39,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:56:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 5628 transitions. [2018-08-07 12:56:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-08-07 12:56:39,065 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:56:39,066 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] [2018-08-07 12:56:39,067 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]=== [2018-08-07 12:56:39,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1555003733, now seen corresponding path program 1 times [2018-08-07 12:56:39,067 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:56:39,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:39,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:39,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:39,069 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:56:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:39,476 WARN L170 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:56:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 108 proven. 232 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-08-07 12:56:39,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:39,591 INFO L194 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 [2018-08-07 12:56:39,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:39,601 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:39,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 375 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-08-07 12:56:39,876 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 206 proven. 107 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-08-07 12:56:40,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:40,568 INFO L194 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 [2018-08-07 12:56:40,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:40,595 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:40,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 375 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-08-07 12:56:41,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 206 proven. 107 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-08-07 12:56:41,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:56:41,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-08-07 12:56:41,408 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:56:41,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:56:41,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:56:41,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:56:41,410 INFO L87 Difference]: Start difference. First operand 3999 states and 5628 transitions. Second operand 9 states. [2018-08-07 12:56:49,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:56:49,885 INFO L93 Difference]: Finished difference Result 11046 states and 16300 transitions. [2018-08-07 12:56:49,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-08-07 12:56:49,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 366 [2018-08-07 12:56:49,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:56:49,932 INFO L225 Difference]: With dead ends: 11046 [2018-08-07 12:56:49,933 INFO L226 Difference]: Without dead ends: 7053 [2018-08-07 12:56:49,974 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1515 GetRequests, 1476 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-08-07 12:56:49,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7053 states. [2018-08-07 12:56:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7053 to 6988. [2018-08-07 12:56:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6988 states. [2018-08-07 12:56:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6988 states to 6988 states and 9146 transitions. [2018-08-07 12:56:50,153 INFO L78 Accepts]: Start accepts. Automaton has 6988 states and 9146 transitions. Word has length 366 [2018-08-07 12:56:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:56:50,154 INFO L480 AbstractCegarLoop]: Abstraction has 6988 states and 9146 transitions. [2018-08-07 12:56:50,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:56:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6988 states and 9146 transitions. [2018-08-07 12:56:50,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2018-08-07 12:56:50,196 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:56:50,197 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] [2018-08-07 12:56:50,197 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]=== [2018-08-07 12:56:50,197 INFO L82 PathProgramCache]: Analyzing trace with hash -287329659, now seen corresponding path program 1 times [2018-08-07 12:56:50,198 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:56:50,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:50,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:50,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:56:50,199 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:56:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 522 proven. 115 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-08-07 12:56:51,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:51,521 INFO L194 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 [2018-08-07 12:56:51,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:51,538 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:51,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2018-08-07 12:56:52,384 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 522 proven. 115 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-08-07 12:56:52,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:56:52,856 INFO L194 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 [2018-08-07 12:56:52,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:56:52,880 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:56:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:56:53,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:56:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2018-08-07 12:56:54,241 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:56:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 522 proven. 115 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-08-07 12:56:54,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:56:54,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-08-07 12:56:54,880 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:56:54,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:56:54,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:56:54,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:56:54,882 INFO L87 Difference]: Start difference. First operand 6988 states and 9146 transitions. Second operand 9 states. [2018-08-07 12:57:01,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:57:01,811 INFO L93 Difference]: Finished difference Result 14680 states and 19999 transitions. [2018-08-07 12:57:01,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 12:57:01,812 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 790 [2018-08-07 12:57:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:57:01,852 INFO L225 Difference]: With dead ends: 14680 [2018-08-07 12:57:01,852 INFO L226 Difference]: Without dead ends: 7698 [2018-08-07 12:57:01,892 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3176 GetRequests, 3156 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-08-07 12:57:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7698 states. [2018-08-07 12:57:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7698 to 7687. [2018-08-07 12:57:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7687 states. [2018-08-07 12:57:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 9849 transitions. [2018-08-07 12:57:02,072 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 9849 transitions. Word has length 790 [2018-08-07 12:57:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:57:02,073 INFO L480 AbstractCegarLoop]: Abstraction has 7687 states and 9849 transitions. [2018-08-07 12:57:02,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:57:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 9849 transitions. [2018-08-07 12:57:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 799 [2018-08-07 12:57:02,121 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:57:02,121 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] [2018-08-07 12:57:02,122 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]=== [2018-08-07 12:57:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1343703118, now seen corresponding path program 1 times [2018-08-07 12:57:02,122 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:57:02,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:02,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:02,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:02,124 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:57:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-08-07 12:57:03,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:03,016 INFO L194 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 [2018-08-07 12:57:03,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:03,023 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:03,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-08-07 12:57:03,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-08-07 12:57:04,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:04,359 INFO L194 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 [2018-08-07 12:57:04,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:04,374 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:04,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-08-07 12:57:05,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-08-07 12:57:05,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:57:05,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-08-07 12:57:05,959 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:57:05,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:57:05,960 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:57:05,960 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:57:05,960 INFO L87 Difference]: Start difference. First operand 7687 states and 9849 transitions. Second operand 9 states. [2018-08-07 12:57:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:57:19,407 INFO L93 Difference]: Finished difference Result 23558 states and 31631 transitions. [2018-08-07 12:57:19,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-08-07 12:57:19,413 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 798 [2018-08-07 12:57:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:57:19,537 INFO L225 Difference]: With dead ends: 23558 [2018-08-07 12:57:19,537 INFO L226 Difference]: Without dead ends: 12719 [2018-08-07 12:57:19,672 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3265 GetRequests, 3212 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=566, Invalid=2296, Unknown=0, NotChecked=0, Total=2862 [2018-08-07 12:57:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12719 states. [2018-08-07 12:57:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12719 to 12683. [2018-08-07 12:57:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12683 states. [2018-08-07 12:57:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12683 states to 12683 states and 14269 transitions. [2018-08-07 12:57:20,021 INFO L78 Accepts]: Start accepts. Automaton has 12683 states and 14269 transitions. Word has length 798 [2018-08-07 12:57:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:57:20,023 INFO L480 AbstractCegarLoop]: Abstraction has 12683 states and 14269 transitions. [2018-08-07 12:57:20,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:57:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 12683 states and 14269 transitions. [2018-08-07 12:57:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1073 [2018-08-07 12:57:20,067 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:57:20,067 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] [2018-08-07 12:57:20,068 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]=== [2018-08-07 12:57:20,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1272565509, now seen corresponding path program 1 times [2018-08-07 12:57:20,068 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:57:20,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:20,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:20,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:20,070 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:57:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:21,264 WARN L170 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-08-07 12:57:21,703 WARN L170 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-08-07 12:57:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 854 proven. 175 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-08-07 12:57:24,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:24,211 INFO L194 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 [2018-08-07 12:57:24,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:24,218 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:24,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-08-07 12:57:25,316 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-08-07 12:57:26,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:26,089 INFO L194 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 [2018-08-07 12:57:26,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:26,104 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:26,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-08-07 12:57:27,477 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1008 proven. 2 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-08-07 12:57:28,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:57:28,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 5, 5] total 22 [2018-08-07 12:57:28,352 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:57:28,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-08-07 12:57:28,354 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-08-07 12:57:28,355 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2018-08-07 12:57:28,355 INFO L87 Difference]: Start difference. First operand 12683 states and 14269 transitions. Second operand 16 states. [2018-08-07 12:57:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:57:38,109 INFO L93 Difference]: Finished difference Result 27449 states and 30896 transitions. [2018-08-07 12:57:38,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-08-07 12:57:38,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1072 [2018-08-07 12:57:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:57:38,211 INFO L225 Difference]: With dead ends: 27449 [2018-08-07 12:57:38,211 INFO L226 Difference]: Without dead ends: 14772 [2018-08-07 12:57:38,280 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4364 GetRequests, 4305 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2018-08-07 12:57:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14772 states. [2018-08-07 12:57:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14772 to 14734. [2018-08-07 12:57:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14734 states. [2018-08-07 12:57:38,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14734 states to 14734 states and 16181 transitions. [2018-08-07 12:57:38,632 INFO L78 Accepts]: Start accepts. Automaton has 14734 states and 16181 transitions. Word has length 1072 [2018-08-07 12:57:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:57:38,634 INFO L480 AbstractCegarLoop]: Abstraction has 14734 states and 16181 transitions. [2018-08-07 12:57:38,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-08-07 12:57:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 14734 states and 16181 transitions. [2018-08-07 12:57:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1074 [2018-08-07 12:57:38,684 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:57:38,685 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] [2018-08-07 12:57:38,685 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]=== [2018-08-07 12:57:38,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2002526148, now seen corresponding path program 1 times [2018-08-07 12:57:38,686 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:57:38,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:38,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:38,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:38,687 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:57:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-08-07 12:57:40,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:40,023 INFO L194 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 [2018-08-07 12:57:40,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:40,034 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:40,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-08-07 12:57:41,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-08-07 12:57:41,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:41,894 INFO L194 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 [2018-08-07 12:57:41,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:41,910 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:42,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-08-07 12:57:43,198 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1063 proven. 2 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2018-08-07 12:57:43,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:57:43,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-08-07 12:57:43,848 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:57:43,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:57:43,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:57:43,850 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:57:43,850 INFO L87 Difference]: Start difference. First operand 14734 states and 16181 transitions. Second operand 9 states. [2018-08-07 12:57:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:57:50,136 INFO L93 Difference]: Finished difference Result 30134 states and 32932 transitions. [2018-08-07 12:57:50,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-08-07 12:57:50,137 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1073 [2018-08-07 12:57:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:57:50,199 INFO L225 Difference]: With dead ends: 30134 [2018-08-07 12:57:50,200 INFO L226 Difference]: Without dead ends: 12650 [2018-08-07 12:57:50,269 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4318 GetRequests, 4292 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-08-07 12:57:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12650 states. [2018-08-07 12:57:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12650 to 12520. [2018-08-07 12:57:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12520 states. [2018-08-07 12:57:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12520 states to 12520 states and 13155 transitions. [2018-08-07 12:57:50,513 INFO L78 Accepts]: Start accepts. Automaton has 12520 states and 13155 transitions. Word has length 1073 [2018-08-07 12:57:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:57:50,514 INFO L480 AbstractCegarLoop]: Abstraction has 12520 states and 13155 transitions. [2018-08-07 12:57:50,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:57:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 12520 states and 13155 transitions. [2018-08-07 12:57:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2018-08-07 12:57:50,565 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:57:50,566 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] [2018-08-07 12:57:50,566 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]=== [2018-08-07 12:57:50,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1357035898, now seen corresponding path program 1 times [2018-08-07 12:57:50,567 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:57:50,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:50,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:50,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:50,568 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:57:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:51,436 WARN L170 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-08-07 12:57:51,796 WARN L170 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2018-08-07 12:57:52,049 WARN L170 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2018-08-07 12:57:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 821 proven. 254 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-08-07 12:57:55,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:57:55,033 INFO L194 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 [2018-08-07 12:57:55,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:55,040 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:57:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:55,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:57:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 2146 trivial. 0 not checked. [2018-08-07 12:57:56,107 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:57:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 2146 trivial. 0 not checked. [2018-08-07 12:57:56,654 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 12:57:56,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [12] total 13 [2018-08-07 12:57:56,655 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:57:56,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:57:56,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:57:56,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-08-07 12:57:56,656 INFO L87 Difference]: Start difference. First operand 12520 states and 13155 transitions. Second operand 3 states. [2018-08-07 12:57:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:57:58,015 INFO L93 Difference]: Finished difference Result 23386 states and 24572 transitions. [2018-08-07 12:57:58,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:57:58,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1160 [2018-08-07 12:57:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:57:58,054 INFO L225 Difference]: With dead ends: 23386 [2018-08-07 12:57:58,054 INFO L226 Difference]: Without dead ends: 12520 [2018-08-07 12:57:58,078 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2331 GetRequests, 2318 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-08-07 12:57:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12520 states. [2018-08-07 12:57:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12520 to 12231. [2018-08-07 12:57:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12231 states. [2018-08-07 12:57:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12231 states to 12231 states and 12817 transitions. [2018-08-07 12:57:58,278 INFO L78 Accepts]: Start accepts. Automaton has 12231 states and 12817 transitions. Word has length 1160 [2018-08-07 12:57:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:57:58,279 INFO L480 AbstractCegarLoop]: Abstraction has 12231 states and 12817 transitions. [2018-08-07 12:57:58,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:57:58,279 INFO L276 IsEmpty]: Start isEmpty. Operand 12231 states and 12817 transitions. [2018-08-07 12:57:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1414 [2018-08-07 12:57:58,320 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:57:58,321 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] [2018-08-07 12:57:58,321 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]=== [2018-08-07 12:57:58,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1368620095, now seen corresponding path program 1 times [2018-08-07 12:57:58,322 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:57:58,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:58,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:57:58,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:57:58,324 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:57:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:57:59,662 WARN L170 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 12:58:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 868 proven. 247 refuted. 0 times theorem prover too weak. 2869 trivial. 0 not checked. [2018-08-07 12:58:01,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:58:01,556 INFO L194 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 [2018-08-07 12:58:01,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:58:01,564 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:58:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:58:01,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:58:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 734 proven. 0 refuted. 0 times theorem prover too weak. 3250 trivial. 0 not checked. [2018-08-07 12:58:02,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:58:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 272 proven. 672 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2018-08-07 12:58:03,793 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:58:03,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-08-07 12:58:03,794 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:58:03,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:58:03,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:58:03,795 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:58:03,796 INFO L87 Difference]: Start difference. First operand 12231 states and 12817 transitions. Second operand 5 states. [2018-08-07 12:58:07,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:58:07,320 INFO L93 Difference]: Finished difference Result 37253 states and 39193 transitions. [2018-08-07 12:58:07,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:58:07,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1413 [2018-08-07 12:58:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:58:07,407 INFO L225 Difference]: With dead ends: 37253 [2018-08-07 12:58:07,407 INFO L226 Difference]: Without dead ends: 24724 [2018-08-07 12:58:07,453 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2843 GetRequests, 2825 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2018-08-07 12:58:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24724 states. [2018-08-07 12:58:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24724 to 23025. [2018-08-07 12:58:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23025 states. [2018-08-07 12:58:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23025 states to 23025 states and 24168 transitions. [2018-08-07 12:58:07,842 INFO L78 Accepts]: Start accepts. Automaton has 23025 states and 24168 transitions. Word has length 1413 [2018-08-07 12:58:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:58:07,842 INFO L480 AbstractCegarLoop]: Abstraction has 23025 states and 24168 transitions. [2018-08-07 12:58:07,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:58:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 23025 states and 24168 transitions. [2018-08-07 12:58:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1640 [2018-08-07 12:58:07,926 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:58:07,928 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] [2018-08-07 12:58:07,928 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]=== [2018-08-07 12:58:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash 384494025, now seen corresponding path program 1 times [2018-08-07 12:58:07,929 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:58:07,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:58:07,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:58:07,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:58:07,937 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:58:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:58:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 1068 proven. 588 refuted. 0 times theorem prover too weak. 3353 trivial. 0 not checked. [2018-08-07 12:58:11,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:58:11,221 INFO L194 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 [2018-08-07 12:58:11,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:58:11,235 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:58:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:58:11,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:58:12,184 WARN L170 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-08-07 12:58:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 2314 proven. 2 refuted. 0 times theorem prover too weak. 2693 trivial. 0 not checked. [2018-08-07 12:58:13,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:58:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 303 proven. 2193 refuted. 0 times theorem prover too weak. 2513 trivial. 0 not checked. [2018-08-07 12:58:16,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:58:16,920 INFO L194 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 [2018-08-07 12:58:16,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:58:16,935 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:58:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:58:18,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:58:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 3493 proven. 14 refuted. 0 times theorem prover too weak. 1502 trivial. 0 not checked. [2018-08-07 12:58:19,591 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:58:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5009 backedges. 1068 proven. 588 refuted. 0 times theorem prover too weak. 3353 trivial. 0 not checked. [2018-08-07 12:58:23,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:58:23,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 6, 5] total 23 [2018-08-07 12:58:23,333 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:58:23,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-08-07 12:58:23,335 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-08-07 12:58:23,335 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2018-08-07 12:58:23,335 INFO L87 Difference]: Start difference. First operand 23025 states and 24168 transitions. Second operand 14 states. [2018-08-07 12:58:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:58:37,726 INFO L93 Difference]: Finished difference Result 49471 states and 51961 transitions. [2018-08-07 12:58:37,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-08-07 12:58:37,726 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1639 [2018-08-07 12:58:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:58:37,817 INFO L225 Difference]: With dead ends: 49471 [2018-08-07 12:58:37,817 INFO L226 Difference]: Without dead ends: 25874 [2018-08-07 12:58:38,032 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6617 GetRequests, 6562 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=427, Invalid=2123, Unknown=0, NotChecked=0, Total=2550 [2018-08-07 12:58:38,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2018-08-07 12:58:38,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 23396. [2018-08-07 12:58:38,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23396 states. [2018-08-07 12:58:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23396 states to 23396 states and 24499 transitions. [2018-08-07 12:58:38,411 INFO L78 Accepts]: Start accepts. Automaton has 23396 states and 24499 transitions. Word has length 1639 [2018-08-07 12:58:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:58:38,412 INFO L480 AbstractCegarLoop]: Abstraction has 23396 states and 24499 transitions. [2018-08-07 12:58:38,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-08-07 12:58:38,412 INFO L276 IsEmpty]: Start isEmpty. Operand 23396 states and 24499 transitions. [2018-08-07 12:58:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1835 [2018-08-07 12:58:38,491 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:58:38,492 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] [2018-08-07 12:58:38,493 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]=== [2018-08-07 12:58:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash -149899618, now seen corresponding path program 1 times [2018-08-07 12:58:38,494 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:58:38,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:58:38,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:58:38,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:58:38,495 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:58:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:58:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 938 proven. 676 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2018-08-07 12:58:40,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:58:40,911 INFO L194 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 [2018-08-07 12:58:40,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:58:40,919 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:58:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:58:41,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:58:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 4094 proven. 2 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2018-08-07 12:58:42,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:58:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 938 proven. 676 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2018-08-07 12:58:44,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:58:44,676 INFO L194 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 [2018-08-07 12:58:44,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:58:44,694 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:58:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:58:45,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:58:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 4094 proven. 2 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2018-08-07 12:58:47,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:58:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 938 proven. 676 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2018-08-07 12:58:49,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:58:49,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-08-07 12:58:49,751 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:58:49,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:58:49,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:58:49,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:58:49,753 INFO L87 Difference]: Start difference. First operand 23396 states and 24499 transitions. Second operand 9 states. [2018-08-07 12:58:54,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:58:54,273 INFO L93 Difference]: Finished difference Result 43929 states and 46331 transitions. [2018-08-07 12:58:54,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-08-07 12:58:54,279 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1834 [2018-08-07 12:58:54,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:58:54,355 INFO L225 Difference]: With dead ends: 43929 [2018-08-07 12:58:54,356 INFO L226 Difference]: Without dead ends: 23201 [2018-08-07 12:58:54,408 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 7358 GetRequests, 7337 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-08-07 12:58:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23201 states. [2018-08-07 12:58:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23201 to 22706. [2018-08-07 12:58:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22706 states. [2018-08-07 12:58:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22706 states to 22706 states and 23581 transitions. [2018-08-07 12:58:54,750 INFO L78 Accepts]: Start accepts. Automaton has 22706 states and 23581 transitions. Word has length 1834 [2018-08-07 12:58:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:58:54,750 INFO L480 AbstractCegarLoop]: Abstraction has 22706 states and 23581 transitions. [2018-08-07 12:58:54,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:58:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 22706 states and 23581 transitions. [2018-08-07 12:58:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1943 [2018-08-07 12:58:54,810 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:58:54,811 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] [2018-08-07 12:58:54,812 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]=== [2018-08-07 12:58:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash 402522256, now seen corresponding path program 1 times [2018-08-07 12:58:54,812 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:58:54,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:58:54,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:58:54,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:58:54,813 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:58:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:59:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2775 proven. 1492 refuted. 0 times theorem prover too weak. 2789 trivial. 0 not checked. [2018-08-07 12:59:01,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:59:01,438 INFO L194 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 [2018-08-07 12:59:01,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:59:01,445 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:59:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:59:02,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:59:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3907 proven. 2 refuted. 0 times theorem prover too weak. 3147 trivial. 0 not checked. [2018-08-07 12:59:03,483 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:59:04,208 WARN L170 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-08-07 12:59:04,370 WARN L170 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-08-07 12:59:04,688 WARN L170 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-08-07 12:59:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 1713 proven. 336 refuted. 0 times theorem prover too weak. 5007 trivial. 0 not checked. [2018-08-07 12:59:06,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:59:06,985 INFO L194 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 [2018-08-07 12:59:07,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:59:07,000 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:59:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:59:08,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:59:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 4248 proven. 2 refuted. 0 times theorem prover too weak. 2806 trivial. 0 not checked. [2018-08-07 12:59:10,257 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:59:10,614 WARN L170 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 12:59:10,779 WARN L170 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-08-07 12:59:11,085 WARN L170 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-08-07 12:59:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 866 proven. 567 refuted. 0 times theorem prover too weak. 5623 trivial. 0 not checked. [2018-08-07 12:59:13,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:59:13,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 5, 5] total 25 [2018-08-07 12:59:13,391 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:59:13,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-08-07 12:59:13,393 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-08-07 12:59:13,394 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-08-07 12:59:13,394 INFO L87 Difference]: Start difference. First operand 22706 states and 23581 transitions. Second operand 19 states. [2018-08-07 12:59:15,040 WARN L170 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-08-07 12:59:19,069 WARN L170 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-08-07 12:59:24,126 WARN L170 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2018-08-07 12:59:25,756 WARN L170 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2018-08-07 12:59:27,059 WARN L170 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2018-08-07 12:59:28,262 WARN L170 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-08-07 12:59:28,452 WARN L170 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2018-08-07 12:59:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:59:28,906 INFO L93 Difference]: Finished difference Result 42116 states and 43917 transitions. [2018-08-07 12:59:28,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-08-07 12:59:28,906 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1942 [2018-08-07 12:59:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:59:28,976 INFO L225 Difference]: With dead ends: 42116 [2018-08-07 12:59:28,976 INFO L226 Difference]: Without dead ends: 23136 [2018-08-07 12:59:29,031 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 7880 GetRequests, 7798 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1051, Invalid=5269, Unknown=0, NotChecked=0, Total=6320 [2018-08-07 12:59:29,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2018-08-07 12:59:29,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 22029. [2018-08-07 12:59:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22029 states. [2018-08-07 12:59:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22029 states to 22029 states and 22798 transitions. [2018-08-07 12:59:29,369 INFO L78 Accepts]: Start accepts. Automaton has 22029 states and 22798 transitions. Word has length 1942 [2018-08-07 12:59:29,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:59:29,370 INFO L480 AbstractCegarLoop]: Abstraction has 22029 states and 22798 transitions. [2018-08-07 12:59:29,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-08-07 12:59:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 22029 states and 22798 transitions. [2018-08-07 12:59:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1973 [2018-08-07 12:59:29,422 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:59:29,422 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] [2018-08-07 12:59:29,423 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]=== [2018-08-07 12:59:29,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1486303465, now seen corresponding path program 1 times [2018-08-07 12:59:29,424 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:59:29,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:59:29,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:59:29,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:59:29,425 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:59:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:59:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 3456 proven. 557 refuted. 0 times theorem prover too weak. 4315 trivial. 0 not checked. [2018-08-07 12:59:33,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:59:33,450 INFO L194 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 [2018-08-07 12:59:33,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:59:33,457 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:59:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:59:34,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:59:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 5765 proven. 6 refuted. 0 times theorem prover too weak. 2557 trivial. 0 not checked. [2018-08-07 12:59:35,947 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:59:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 1720 proven. 1099 refuted. 0 times theorem prover too weak. 5509 trivial. 0 not checked. [2018-08-07 12:59:39,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:59:39,091 INFO L194 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 [2018-08-07 12:59:39,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:59:39,107 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:59:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:59:40,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:59:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 5033 proven. 872 refuted. 0 times theorem prover too weak. 2423 trivial. 0 not checked. [2018-08-07 12:59:42,490 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:59:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8328 backedges. 1581 proven. 549 refuted. 0 times theorem prover too weak. 6198 trivial. 0 not checked. [2018-08-07 12:59:47,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:59:47,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 7, 5] total 32 [2018-08-07 12:59:47,067 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:59:47,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-08-07 12:59:47,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-08-07 12:59:47,070 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2018-08-07 12:59:47,071 INFO L87 Difference]: Start difference. First operand 22029 states and 22798 transitions. Second operand 20 states. Received shutdown request... [2018-08-07 12:59:50,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:59:50,440 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 12:59:50,446 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 12:59:50,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 12:59:50 BoogieIcfgContainer [2018-08-07 12:59:50,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 12:59:50,448 INFO L168 Benchmark]: Toolchain (without parser) took 226898.41 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 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-08-07 12:59:50,449 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-08-07 12:59:50,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1187.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-08-07 12:59:50,450 INFO L168 Benchmark]: Boogie Procedure Inliner took 225.53 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: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-08-07 12:59:50,451 INFO L168 Benchmark]: Boogie Preprocessor took 477.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 816.8 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -965.8 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2018-08-07 12:59:50,451 INFO L168 Benchmark]: RCFGBuilder took 6197.78 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 261.3 MB). Peak memory consumption was 261.3 MB. Max. memory is 7.1 GB. [2018-08-07 12:59:50,452 INFO L168 Benchmark]: TraceAbstraction took 218803.64 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.5 GB in the end (delta: -510.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-08-07 12:59:50,456 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1187.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 225.53 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: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 477.42 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 816.8 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -965.8 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6197.78 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 261.3 MB). Peak memory consumption was 261.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218803.64 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.5 GB in the end (delta: -510.5 MB). Peak memory consumption was 1.3 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 8 states, 20 states before enhancement), while ReachableStatesComputation was computing reachable states (636 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 218.7s OverallTime, 14 OverallIterations, 12 TraceHistogramMax, 113.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1896 SDtfs, 35438 SDslu, 3569 SDs, 0 SdLazy, 73450 SolverSat, 10198 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 85.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52136 GetRequests, 51688 SyntacticMatches, 39 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4992 ImplicationChecksByTransitivity, 21.3s 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: 1.3s SsaConstructionTime, 12.0s SatisfiabilityAnalysisTime, 69.9s 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-0-2018-08-07_12-59-50-469.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-0-2018-08-07_12-59-50-469.csv Completed graceful shutdown