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/Problem15_label59_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:14:57,720 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:14:57,722 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:14:57,734 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:14:57,734 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:14:57,735 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:14:57,736 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:14:57,738 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:14:57,740 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:14:57,741 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:14:57,742 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:14:57,742 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:14:57,743 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:14:57,744 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:14:57,745 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:14:57,746 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:14:57,747 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:14:57,749 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:14:57,751 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:14:57,752 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:14:57,753 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:14:57,754 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:14:57,757 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:14:57,757 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:14:57,757 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:14:57,758 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:14:57,759 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:14:57,760 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:14:57,761 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:14:57,762 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:14:57,763 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:14:57,764 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:14:57,764 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:14:57,764 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:14:57,765 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:14:57,766 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:14:57,766 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 12:14:57,793 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:14:57,793 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:14:57,795 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:14:57,795 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:14:57,795 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:14:57,795 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:14:57,795 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:14:57,796 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:14:57,796 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:14:57,796 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:14:57,796 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:14:57,797 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:14:57,797 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:14:57,798 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:14:57,798 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:14:57,798 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:14:57,799 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:14:57,799 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:14:57,799 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:14:57,799 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:14:57,799 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:14:57,799 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:14:57,800 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:14:57,800 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:14:57,800 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:14:57,800 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:14:57,802 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:14:57,802 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:14:57,802 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:14:57,803 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:14:57,803 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:14:57,803 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:14:57,803 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:14:57,873 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:14:57,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:14:57,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:14:57,891 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:14:57,892 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:14:57,892 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59_true-unreach-call.c [2018-09-10 12:14:58,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5566f06/37316c6076544aa4bc843d27d26a3ded/FLAG040d00856 [2018-09-10 12:14:58,671 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:14:58,672 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label59_true-unreach-call.c [2018-09-10 12:14:58,696 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5566f06/37316c6076544aa4bc843d27d26a3ded/FLAG040d00856 [2018-09-10 12:14:58,712 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5566f06/37316c6076544aa4bc843d27d26a3ded [2018-09-10 12:14:58,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:14:58,728 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:14:58,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:14:58,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:14:58,741 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:14:58,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:14:58" (1/1) ... [2018-09-10 12:14:58,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3596d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:14:58, skipping insertion in model container [2018-09-10 12:14:58,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:14:58" (1/1) ... [2018-09-10 12:14:59,003 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:14:59,553 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:14:59,573 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:14:59,863 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:15:00,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00 WrapperNode [2018-09-10 12:15:00,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:15:00,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:15:00,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:15:00,003 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:15:00,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (1/1) ... [2018-09-10 12:15:00,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (1/1) ... [2018-09-10 12:15:00,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:15:00,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:15:00,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:15:00,257 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:15:00,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (1/1) ... [2018-09-10 12:15:00,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (1/1) ... [2018-09-10 12:15:00,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (1/1) ... [2018-09-10 12:15:00,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (1/1) ... [2018-09-10 12:15:00,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (1/1) ... [2018-09-10 12:15:00,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (1/1) ... [2018-09-10 12:15:00,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (1/1) ... [2018-09-10 12:15:00,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:15:00,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:15:00,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:15:00,912 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:15:00,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:15:00,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:15:00,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:15:00,989 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 12:15:00,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 12:15:00,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:15:00,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:15:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:15:00,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:15:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:15:00,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:15:09,290 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:15:09,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:15:09 BoogieIcfgContainer [2018-09-10 12:15:09,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:15:09,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:15:09,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:15:09,295 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:15:09,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:14:58" (1/3) ... [2018-09-10 12:15:09,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fbc218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:15:09, skipping insertion in model container [2018-09-10 12:15:09,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:15:00" (2/3) ... [2018-09-10 12:15:09,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fbc218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:15:09, skipping insertion in model container [2018-09-10 12:15:09,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:15:09" (3/3) ... [2018-09-10 12:15:09,300 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label59_true-unreach-call.c [2018-09-10 12:15:09,308 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:15:09,317 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:15:09,375 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:15:09,376 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:15:09,376 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:15:09,376 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:15:09,376 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:15:09,376 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:15:09,377 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:15:09,377 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:15:09,377 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:15:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-09-10 12:15:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-10 12:15:09,439 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:15:09,440 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:15:09,441 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:15:09,446 INFO L82 PathProgramCache]: Analyzing trace with hash -511197975, now seen corresponding path program 1 times [2018-09-10 12:15:09,448 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:15:09,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:09,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:15:09,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:09,500 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:15:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:15:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:15:09,957 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:15:09,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:15:09,957 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:15:09,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:15:09,980 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:15:09,981 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:15:09,984 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-09-10 12:15:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:15:17,076 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-09-10 12:15:17,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:15:17,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2018-09-10 12:15:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:15:17,120 INFO L225 Difference]: With dead ends: 1558 [2018-09-10 12:15:17,121 INFO L226 Difference]: Without dead ends: 1114 [2018-09-10 12:15:17,135 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:15:17,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-09-10 12:15:17,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 759. [2018-09-10 12:15:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2018-09-10 12:15:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1355 transitions. [2018-09-10 12:15:17,247 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1355 transitions. Word has length 61 [2018-09-10 12:15:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:15:17,248 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 1355 transitions. [2018-09-10 12:15:17,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:15:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1355 transitions. [2018-09-10 12:15:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-10 12:15:17,263 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:15:17,263 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:15:17,264 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:15:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1113551139, now seen corresponding path program 1 times [2018-09-10 12:15:17,265 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:15:17,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:17,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:15:17,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:17,267 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:15:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:15:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:15:17,563 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:15:17,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 12:15:17,564 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:15:17,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:15:17,566 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:15:17,567 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-10 12:15:17,567 INFO L87 Difference]: Start difference. First operand 759 states and 1355 transitions. Second operand 5 states. [2018-09-10 12:15:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:15:31,392 INFO L93 Difference]: Finished difference Result 2506 states and 4577 transitions. [2018-09-10 12:15:31,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:15:31,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2018-09-10 12:15:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:15:31,418 INFO L225 Difference]: With dead ends: 2506 [2018-09-10 12:15:31,419 INFO L226 Difference]: Without dead ends: 1753 [2018-09-10 12:15:31,425 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-10 12:15:31,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2018-09-10 12:15:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1733. [2018-09-10 12:15:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-09-10 12:15:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 3007 transitions. [2018-09-10 12:15:31,530 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 3007 transitions. Word has length 131 [2018-09-10 12:15:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:15:31,532 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 3007 transitions. [2018-09-10 12:15:31,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:15:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 3007 transitions. [2018-09-10 12:15:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-10 12:15:31,539 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:15:31,540 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, 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] [2018-09-10 12:15:31,540 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:15:31,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1225089816, now seen corresponding path program 1 times [2018-09-10 12:15:31,540 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:15:31,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:31,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:15:31,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:31,547 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:15:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:15:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:15:31,755 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:15:31,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:15:31,755 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:15:31,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:15:31,756 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:15:31,756 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:15:31,757 INFO L87 Difference]: Start difference. First operand 1733 states and 3007 transitions. Second operand 6 states. [2018-09-10 12:15:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:15:37,466 INFO L93 Difference]: Finished difference Result 4810 states and 8533 transitions. [2018-09-10 12:15:37,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 12:15:37,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2018-09-10 12:15:37,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:15:37,487 INFO L225 Difference]: With dead ends: 4810 [2018-09-10 12:15:37,487 INFO L226 Difference]: Without dead ends: 3083 [2018-09-10 12:15:37,494 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:15:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3083 states. [2018-09-10 12:15:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3083 to 2951. [2018-09-10 12:15:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2951 states. [2018-09-10 12:15:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 4527 transitions. [2018-09-10 12:15:37,583 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 4527 transitions. Word has length 132 [2018-09-10 12:15:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:15:37,583 INFO L480 AbstractCegarLoop]: Abstraction has 2951 states and 4527 transitions. [2018-09-10 12:15:37,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:15:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 4527 transitions. [2018-09-10 12:15:37,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-10 12:15:37,586 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:15:37,587 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, 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] [2018-09-10 12:15:37,587 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:15:37,587 INFO L82 PathProgramCache]: Analyzing trace with hash 10237216, now seen corresponding path program 1 times [2018-09-10 12:15:37,587 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:15:37,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:37,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:15:37,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:37,589 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:15:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:15:37,839 WARN L175 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:15:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:15:38,221 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:15:38,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:15:38,221 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:15:38,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:15:38,222 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:15:38,222 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:15:38,222 INFO L87 Difference]: Start difference. First operand 2951 states and 4527 transitions. Second operand 6 states. [2018-09-10 12:15:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:15:44,049 INFO L93 Difference]: Finished difference Result 8979 states and 14291 transitions. [2018-09-10 12:15:44,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:15:44,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-09-10 12:15:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:15:44,079 INFO L225 Difference]: With dead ends: 8979 [2018-09-10 12:15:44,080 INFO L226 Difference]: Without dead ends: 6034 [2018-09-10 12:15:44,100 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:15:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2018-09-10 12:15:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 5729. [2018-09-10 12:15:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5729 states. [2018-09-10 12:15:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 8161 transitions. [2018-09-10 12:15:44,263 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 8161 transitions. Word has length 136 [2018-09-10 12:15:44,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:15:44,263 INFO L480 AbstractCegarLoop]: Abstraction has 5729 states and 8161 transitions. [2018-09-10 12:15:44,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:15:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 8161 transitions. [2018-09-10 12:15:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-10 12:15:44,269 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:15:44,277 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, 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] [2018-09-10 12:15:44,277 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:15:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1284000927, now seen corresponding path program 1 times [2018-09-10 12:15:44,278 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:15:44,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:44,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:15:44,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:44,279 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:15:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:15:45,023 WARN L175 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-09-10 12:15:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:15:45,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:15:45,055 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:15:45,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:15:45,072 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:15:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:15:45,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:15:49,611 WARN L175 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 37 [2018-09-10 12:15:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:15:51,923 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:15:52,320 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-09-10 12:15:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:15:52,555 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:15:52,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-09-10 12:15:52,556 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:15:52,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:15:52,557 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:15:52,557 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-09-10 12:15:52,561 INFO L87 Difference]: Start difference. First operand 5729 states and 8161 transitions. Second operand 3 states. [2018-09-10 12:15:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:15:56,686 INFO L93 Difference]: Finished difference Result 13614 states and 19902 transitions. [2018-09-10 12:15:56,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:15:56,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2018-09-10 12:15:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:15:56,718 INFO L225 Difference]: With dead ends: 13614 [2018-09-10 12:15:56,719 INFO L226 Difference]: Without dead ends: 5384 [2018-09-10 12:15:56,748 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 310 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-09-10 12:15:56,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2018-09-10 12:15:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 5384. [2018-09-10 12:15:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5384 states. [2018-09-10 12:15:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5384 states to 5384 states and 6898 transitions. [2018-09-10 12:15:56,870 INFO L78 Accepts]: Start accepts. Automaton has 5384 states and 6898 transitions. Word has length 157 [2018-09-10 12:15:56,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:15:56,871 INFO L480 AbstractCegarLoop]: Abstraction has 5384 states and 6898 transitions. [2018-09-10 12:15:56,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:15:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 5384 states and 6898 transitions. [2018-09-10 12:15:56,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-09-10 12:15:56,878 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:15:56,879 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:15:56,879 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:15:56,879 INFO L82 PathProgramCache]: Analyzing trace with hash 885541483, now seen corresponding path program 1 times [2018-09-10 12:15:56,879 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:15:56,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:56,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:15:56,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:15:56,881 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:15:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:15:57,254 WARN L175 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-09-10 12:15:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:15:57,392 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:15:57,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:15:57,393 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:15:57,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:15:57,394 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:15:57,394 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:15:57,394 INFO L87 Difference]: Start difference. First operand 5384 states and 6898 transitions. Second operand 6 states. [2018-09-10 12:16:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:16:04,417 INFO L93 Difference]: Finished difference Result 10819 states and 14099 transitions. [2018-09-10 12:16:04,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:16:04,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 229 [2018-09-10 12:16:04,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:16:04,441 INFO L225 Difference]: With dead ends: 10819 [2018-09-10 12:16:04,441 INFO L226 Difference]: Without dead ends: 5750 [2018-09-10 12:16:04,462 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:16:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5750 states. [2018-09-10 12:16:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5750 to 5670. [2018-09-10 12:16:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5670 states. [2018-09-10 12:16:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 7267 transitions. [2018-09-10 12:16:04,588 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 7267 transitions. Word has length 229 [2018-09-10 12:16:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:16:04,589 INFO L480 AbstractCegarLoop]: Abstraction has 5670 states and 7267 transitions. [2018-09-10 12:16:04,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:16:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 7267 transitions. [2018-09-10 12:16:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-09-10 12:16:04,599 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:16:04,600 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:16:04,600 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:16:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1431486414, now seen corresponding path program 1 times [2018-09-10 12:16:04,600 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:16:04,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:16:04,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:04,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:16:04,602 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:16:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:04,887 WARN L175 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:16:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 108 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:16:05,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:16:05,089 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:16:05,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:05,100 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:16:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:05,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:16:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-09-10 12:16:05,328 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:16:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 108 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:16:05,790 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:16:05,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 12:16:05,791 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:16:05,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:16:05,791 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:16:05,792 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:16:05,792 INFO L87 Difference]: Start difference. First operand 5670 states and 7267 transitions. Second operand 5 states. [2018-09-10 12:16:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:16:10,338 INFO L93 Difference]: Finished difference Result 15140 states and 20044 transitions. [2018-09-10 12:16:10,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:16:10,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2018-09-10 12:16:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:16:10,379 INFO L225 Difference]: With dead ends: 15140 [2018-09-10 12:16:10,379 INFO L226 Difference]: Without dead ends: 9784 [2018-09-10 12:16:10,407 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 525 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:16:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9784 states. [2018-09-10 12:16:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9784 to 8889. [2018-09-10 12:16:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8889 states. [2018-09-10 12:16:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 11109 transitions. [2018-09-10 12:16:10,593 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 11109 transitions. Word has length 265 [2018-09-10 12:16:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:16:10,593 INFO L480 AbstractCegarLoop]: Abstraction has 8889 states and 11109 transitions. [2018-09-10 12:16:10,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:16:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 11109 transitions. [2018-09-10 12:16:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-09-10 12:16:10,598 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:16:10,599 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:16:10,599 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:16:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash 967230828, now seen corresponding path program 1 times [2018-09-10 12:16:10,599 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:16:10,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:16:10,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:10,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:16:10,601 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:16:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:11,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:16:11,062 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:16:11,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:11,069 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:16:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:11,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:16:17,301 WARN L175 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 38 [2018-09-10 12:16:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:17,428 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:16:17,968 WARN L175 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2018-09-10 12:16:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:18,904 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:16:18,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-09-10 12:16:18,904 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:16:18,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:16:18,905 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:16:18,905 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:16:18,906 INFO L87 Difference]: Start difference. First operand 8889 states and 11109 transitions. Second operand 6 states. [2018-09-10 12:16:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:16:36,579 INFO L93 Difference]: Finished difference Result 21512 states and 27183 transitions. [2018-09-10 12:16:36,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 12:16:36,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 299 [2018-09-10 12:16:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:16:36,624 INFO L225 Difference]: With dead ends: 21512 [2018-09-10 12:16:36,625 INFO L226 Difference]: Without dead ends: 12315 [2018-09-10 12:16:36,646 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 593 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:16:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12315 states. [2018-09-10 12:16:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12315 to 11691. [2018-09-10 12:16:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11691 states. [2018-09-10 12:16:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11691 states to 11691 states and 14871 transitions. [2018-09-10 12:16:36,884 INFO L78 Accepts]: Start accepts. Automaton has 11691 states and 14871 transitions. Word has length 299 [2018-09-10 12:16:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:16:36,884 INFO L480 AbstractCegarLoop]: Abstraction has 11691 states and 14871 transitions. [2018-09-10 12:16:36,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:16:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 11691 states and 14871 transitions. [2018-09-10 12:16:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-09-10 12:16:36,892 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:16:36,893 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:16:36,893 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:16:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash 182703236, now seen corresponding path program 1 times [2018-09-10 12:16:36,894 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:16:36,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:16:36,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:36,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:16:36,895 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:16:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:37,281 WARN L175 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:16:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:37,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:16:37,497 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:16:37,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:37,504 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:16:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:37,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:16:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:37,809 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:16:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:38,158 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:16:38,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-10 12:16:38,159 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:16:38,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:16:38,160 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:16:38,162 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:16:38,163 INFO L87 Difference]: Start difference. First operand 11691 states and 14871 transitions. Second operand 3 states. [2018-09-10 12:16:40,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:16:40,023 INFO L93 Difference]: Finished difference Result 22837 states and 29322 transitions. [2018-09-10 12:16:40,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:16:40,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2018-09-10 12:16:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:16:40,069 INFO L225 Difference]: With dead ends: 22837 [2018-09-10 12:16:40,069 INFO L226 Difference]: Without dead ends: 11152 [2018-09-10 12:16:40,100 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 671 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:16:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11152 states. [2018-09-10 12:16:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11152 to 11149. [2018-09-10 12:16:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11149 states. [2018-09-10 12:16:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 13826 transitions. [2018-09-10 12:16:40,321 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 13826 transitions. Word has length 336 [2018-09-10 12:16:40,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:16:40,322 INFO L480 AbstractCegarLoop]: Abstraction has 11149 states and 13826 transitions. [2018-09-10 12:16:40,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:16:40,322 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 13826 transitions. [2018-09-10 12:16:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2018-09-10 12:16:40,360 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:16:40,361 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:16:40,361 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:16:40,362 INFO L82 PathProgramCache]: Analyzing trace with hash -368464152, now seen corresponding path program 1 times [2018-09-10 12:16:40,362 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:16:40,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:16:40,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:40,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:16:40,363 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:16:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:41,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:16:41,374 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:16:41,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:41,389 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:16:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:41,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:16:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:41,960 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:16:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:42,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:16:42,536 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:16:42,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:42,554 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:16:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:42,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:16:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:43,340 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:16:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:44,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:16:44,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-10 12:16:44,275 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:16:44,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:16:44,278 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:16:44,278 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:16:44,278 INFO L87 Difference]: Start difference. First operand 11149 states and 13826 transitions. Second operand 9 states. [2018-09-10 12:16:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:16:50,604 INFO L93 Difference]: Finished difference Result 27700 states and 36882 transitions. [2018-09-10 12:16:50,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-10 12:16:50,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 548 [2018-09-10 12:16:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:16:50,681 INFO L225 Difference]: With dead ends: 27700 [2018-09-10 12:16:50,681 INFO L226 Difference]: Without dead ends: 16557 [2018-09-10 12:16:50,739 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2211 GetRequests, 2189 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:16:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16557 states. [2018-09-10 12:16:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16557 to 16239. [2018-09-10 12:16:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16239 states. [2018-09-10 12:16:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16239 states to 16239 states and 19900 transitions. [2018-09-10 12:16:51,343 INFO L78 Accepts]: Start accepts. Automaton has 16239 states and 19900 transitions. Word has length 548 [2018-09-10 12:16:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:16:51,344 INFO L480 AbstractCegarLoop]: Abstraction has 16239 states and 19900 transitions. [2018-09-10 12:16:51,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:16:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 16239 states and 19900 transitions. [2018-09-10 12:16:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2018-09-10 12:16:51,426 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:16:51,427 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:16:51,427 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:16:51,428 INFO L82 PathProgramCache]: Analyzing trace with hash 550352463, now seen corresponding path program 1 times [2018-09-10 12:16:51,428 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:16:51,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:16:51,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:51,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:16:51,429 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:16:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:52,587 WARN L175 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-10 12:16:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 528 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:16:53,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:16:53,567 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:16:53,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:16:53,578 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:16:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:16:53,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:16:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 422 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:16:54,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:16:54,631 WARN L175 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-10 12:16:55,129 WARN L175 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-09-10 12:16:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 162 proven. 360 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2018-09-10 12:16:56,431 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:16:56,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 17 [2018-09-10 12:16:56,432 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:16:56,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:16:56,433 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:16:56,433 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:16:56,433 INFO L87 Difference]: Start difference. First operand 16239 states and 19900 transitions. Second operand 5 states. [2018-09-10 12:17:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:17:01,895 INFO L93 Difference]: Finished difference Result 34681 states and 44067 transitions. [2018-09-10 12:17:01,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:17:01,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 717 [2018-09-10 12:17:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:17:01,972 INFO L225 Difference]: With dead ends: 34681 [2018-09-10 12:17:01,973 INFO L226 Difference]: Without dead ends: 18448 [2018-09-10 12:17:02,047 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1447 GetRequests, 1429 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:17:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18448 states. [2018-09-10 12:17:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18448 to 17591. [2018-09-10 12:17:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17591 states. [2018-09-10 12:17:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17591 states to 17591 states and 21417 transitions. [2018-09-10 12:17:02,520 INFO L78 Accepts]: Start accepts. Automaton has 17591 states and 21417 transitions. Word has length 717 [2018-09-10 12:17:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:17:02,521 INFO L480 AbstractCegarLoop]: Abstraction has 17591 states and 21417 transitions. [2018-09-10 12:17:02,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:17:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17591 states and 21417 transitions. [2018-09-10 12:17:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2018-09-10 12:17:02,599 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:17:02,600 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:17:02,601 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:17:02,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1612775214, now seen corresponding path program 1 times [2018-09-10 12:17:02,601 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:17:02,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:17:02,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:02,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:17:02,603 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:17:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:17:03,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:17:03,881 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:17:03,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:03,889 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:17:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:04,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:17:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:17:04,612 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:17:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:17:05,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:17:05,372 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:17:05,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:05,387 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:17:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:06,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:17:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:17:06,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:17:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 632 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:17:07,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:17:07,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:17:07,099 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:17:07,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:17:07,101 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:17:07,101 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:17:07,101 INFO L87 Difference]: Start difference. First operand 17591 states and 21417 transitions. Second operand 9 states. [2018-09-10 12:17:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:17:12,551 INFO L93 Difference]: Finished difference Result 32409 states and 39307 transitions. [2018-09-10 12:17:12,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:17:12,552 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 816 [2018-09-10 12:17:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:17:12,596 INFO L225 Difference]: With dead ends: 32409 [2018-09-10 12:17:12,596 INFO L226 Difference]: Without dead ends: 15132 [2018-09-10 12:17:12,661 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3282 GetRequests, 3262 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:17:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15132 states. [2018-09-10 12:17:12,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15132 to 14542. [2018-09-10 12:17:12,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14542 states. [2018-09-10 12:17:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14542 states to 14542 states and 16376 transitions. [2018-09-10 12:17:12,901 INFO L78 Accepts]: Start accepts. Automaton has 14542 states and 16376 transitions. Word has length 816 [2018-09-10 12:17:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:17:12,902 INFO L480 AbstractCegarLoop]: Abstraction has 14542 states and 16376 transitions. [2018-09-10 12:17:12,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:17:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 14542 states and 16376 transitions. [2018-09-10 12:17:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2018-09-10 12:17:12,931 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:17:12,931 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:17:12,932 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:17:12,932 INFO L82 PathProgramCache]: Analyzing trace with hash -834410709, now seen corresponding path program 1 times [2018-09-10 12:17:12,932 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:17:12,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:17:12,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:12,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:17:12,934 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:17:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 360 proven. 6 refuted. 0 times theorem prover too weak. 1355 trivial. 0 not checked. [2018-09-10 12:17:13,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:17:13,811 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:17:13,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:13,819 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:17:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:14,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:17:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 969 proven. 0 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2018-09-10 12:17:14,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:17:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1721 backedges. 360 proven. 6 refuted. 0 times theorem prover too weak. 1355 trivial. 0 not checked. [2018-09-10 12:17:14,776 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:17:14,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-09-10 12:17:14,777 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:17:14,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:17:14,777 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:17:14,778 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:17:14,778 INFO L87 Difference]: Start difference. First operand 14542 states and 16376 transitions. Second operand 3 states. [2018-09-10 12:17:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:17:15,977 INFO L93 Difference]: Finished difference Result 28768 states and 32450 transitions. [2018-09-10 12:17:15,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:17:15,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 849 [2018-09-10 12:17:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:17:16,004 INFO L225 Difference]: With dead ends: 28768 [2018-09-10 12:17:16,004 INFO L226 Difference]: Without dead ends: 14540 [2018-09-10 12:17:16,023 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1700 GetRequests, 1698 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:17:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14540 states. [2018-09-10 12:17:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14540 to 14540. [2018-09-10 12:17:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14540 states. [2018-09-10 12:17:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 16372 transitions. [2018-09-10 12:17:16,225 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 16372 transitions. Word has length 849 [2018-09-10 12:17:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:17:16,226 INFO L480 AbstractCegarLoop]: Abstraction has 14540 states and 16372 transitions. [2018-09-10 12:17:16,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:17:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 16372 transitions. [2018-09-10 12:17:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2018-09-10 12:17:16,254 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:17:16,255 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:17:16,255 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:17:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1425172494, now seen corresponding path program 1 times [2018-09-10 12:17:16,256 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:17:16,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:17:16,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:16,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:17:16,257 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:17:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 697 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:17:17,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:17:17,374 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:17:17,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:17,382 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:17:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:17,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:17:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 697 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:17:18,314 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:17:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 697 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:17:19,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:17:19,741 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:17:19,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:19,757 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:17:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:20,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:17:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 697 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:17:20,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:17:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 697 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:17:21,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:17:21,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-09-10 12:17:21,480 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:17:21,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:17:21,482 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:17:21,482 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:17:21,482 INFO L87 Difference]: Start difference. First operand 14540 states and 16372 transitions. Second operand 7 states. [2018-09-10 12:17:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:17:28,308 INFO L93 Difference]: Finished difference Result 33548 states and 38764 transitions. [2018-09-10 12:17:28,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 12:17:28,309 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 851 [2018-09-10 12:17:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:17:28,357 INFO L225 Difference]: With dead ends: 33548 [2018-09-10 12:17:28,357 INFO L226 Difference]: Without dead ends: 19322 [2018-09-10 12:17:28,388 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3416 GetRequests, 3400 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:17:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19322 states. [2018-09-10 12:17:28,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19322 to 18180. [2018-09-10 12:17:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18180 states. [2018-09-10 12:17:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18180 states to 18180 states and 20562 transitions. [2018-09-10 12:17:28,663 INFO L78 Accepts]: Start accepts. Automaton has 18180 states and 20562 transitions. Word has length 851 [2018-09-10 12:17:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:17:28,664 INFO L480 AbstractCegarLoop]: Abstraction has 18180 states and 20562 transitions. [2018-09-10 12:17:28,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:17:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 18180 states and 20562 transitions. [2018-09-10 12:17:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2018-09-10 12:17:28,696 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:17:28,697 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:17:28,697 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:17:28,697 INFO L82 PathProgramCache]: Analyzing trace with hash 204219720, now seen corresponding path program 1 times [2018-09-10 12:17:28,697 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:17:28,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:17:28,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:28,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:17:28,699 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:17:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:17:30,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:17:30,172 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:17:30,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:30,180 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:17:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:30,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:17:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:17:31,386 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:17:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:17:32,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:17:32,236 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:17:32,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:32,252 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:17:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:32,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:17:33,776 WARN L175 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 12:17:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:17:34,560 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:17:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:17:35,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:17:35,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7, 8, 9] total 21 [2018-09-10 12:17:35,798 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:17:35,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 12:17:35,799 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 12:17:35,800 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:17:35,800 INFO L87 Difference]: Start difference. First operand 18180 states and 20562 transitions. Second operand 13 states. [2018-09-10 12:17:46,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:17:46,661 INFO L93 Difference]: Finished difference Result 36737 states and 41626 transitions. [2018-09-10 12:17:46,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-10 12:17:46,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 889 [2018-09-10 12:17:46,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:17:46,700 INFO L225 Difference]: With dead ends: 36737 [2018-09-10 12:17:46,700 INFO L226 Difference]: Without dead ends: 18871 [2018-09-10 12:17:46,725 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3605 GetRequests, 3559 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=395, Invalid=1327, Unknown=0, NotChecked=0, Total=1722 [2018-09-10 12:17:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18871 states. [2018-09-10 12:17:46,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18871 to 18503. [2018-09-10 12:17:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18503 states. [2018-09-10 12:17:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18503 states to 18503 states and 20731 transitions. [2018-09-10 12:17:46,965 INFO L78 Accepts]: Start accepts. Automaton has 18503 states and 20731 transitions. Word has length 889 [2018-09-10 12:17:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:17:46,966 INFO L480 AbstractCegarLoop]: Abstraction has 18503 states and 20731 transitions. [2018-09-10 12:17:46,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 12:17:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 18503 states and 20731 transitions. [2018-09-10 12:17:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 903 [2018-09-10 12:17:46,997 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:17:46,998 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:17:46,998 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:17:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash 223263010, now seen corresponding path program 1 times [2018-09-10 12:17:46,999 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:17:46,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:17:46,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:47,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:17:47,000 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:17:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:47,970 WARN L175 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-09-10 12:17:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2018-09-10 12:17:49,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:17:49,083 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:17:49,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:17:49,091 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:17:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:17:49,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:17:53,523 WARN L175 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 38 [2018-09-10 12:17:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 14 proven. 154 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2018-09-10 12:17:54,074 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:18:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2018-09-10 12:18:02,269 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:18:02,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-09-10 12:18:02,269 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:18:02,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:18:02,270 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:18:02,270 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-09-10 12:18:02,271 INFO L87 Difference]: Start difference. First operand 18503 states and 20731 transitions. Second operand 6 states. [2018-09-10 12:18:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:18:10,984 INFO L93 Difference]: Finished difference Result 37312 states and 41874 transitions. [2018-09-10 12:18:10,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 12:18:10,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 902 [2018-09-10 12:18:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:18:11,026 INFO L225 Difference]: With dead ends: 37312 [2018-09-10 12:18:11,026 INFO L226 Difference]: Without dead ends: 18813 [2018-09-10 12:18:11,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1816 GetRequests, 1800 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-09-10 12:18:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18813 states. [2018-09-10 12:18:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18813 to 17575. [2018-09-10 12:18:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17575 states. [2018-09-10 12:18:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17575 states to 17575 states and 19681 transitions. [2018-09-10 12:18:11,269 INFO L78 Accepts]: Start accepts. Automaton has 17575 states and 19681 transitions. Word has length 902 [2018-09-10 12:18:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:18:11,269 INFO L480 AbstractCegarLoop]: Abstraction has 17575 states and 19681 transitions. [2018-09-10 12:18:11,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:18:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 17575 states and 19681 transitions. [2018-09-10 12:18:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 926 [2018-09-10 12:18:11,446 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:18:11,447 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:18:11,447 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:18:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash 306338735, now seen corresponding path program 1 times [2018-09-10 12:18:11,448 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:18:11,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:18:11,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:18:11,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:18:11,448 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:18:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:18:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 1104 proven. 214 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2018-09-10 12:18:12,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:18:12,835 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:18:12,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:18:12,855 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:18:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:18:13,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:18:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 866 proven. 0 refuted. 0 times theorem prover too weak. 1417 trivial. 0 not checked. [2018-09-10 12:18:13,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:18:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2018-09-10 12:18:13,943 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:18:13,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 8 [2018-09-10 12:18:13,943 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:18:13,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:18:13,944 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:18:13,944 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:18:13,945 INFO L87 Difference]: Start difference. First operand 17575 states and 19681 transitions. Second operand 3 states. [2018-09-10 12:18:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:18:15,898 INFO L93 Difference]: Finished difference Result 46214 states and 52683 transitions. [2018-09-10 12:18:15,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:18:15,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 925 [2018-09-10 12:18:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:18:15,974 INFO L225 Difference]: With dead ends: 46214 [2018-09-10 12:18:15,975 INFO L226 Difference]: Without dead ends: 28953 [2018-09-10 12:18:16,029 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1857 GetRequests, 1851 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:18:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28953 states. [2018-09-10 12:18:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28953 to 27463. [2018-09-10 12:18:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27463 states. [2018-09-10 12:18:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27463 states to 27463 states and 29935 transitions. [2018-09-10 12:18:16,424 INFO L78 Accepts]: Start accepts. Automaton has 27463 states and 29935 transitions. Word has length 925 [2018-09-10 12:18:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:18:16,424 INFO L480 AbstractCegarLoop]: Abstraction has 27463 states and 29935 transitions. [2018-09-10 12:18:16,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:18:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 27463 states and 29935 transitions. [2018-09-10 12:18:16,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2018-09-10 12:18:16,466 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:18:16,467 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, 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, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:18:16,467 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:18:16,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1815038194, now seen corresponding path program 1 times [2018-09-10 12:18:16,467 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:18:16,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:18:16,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:18:16,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:18:16,468 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:18:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:18:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 759 proven. 235 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2018-09-10 12:18:18,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:18:18,213 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:18:18,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:18:18,224 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:18:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:18:18,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:18:19,210 WARN L175 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-09-10 12:18:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 923 proven. 2 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2018-09-10 12:18:19,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:18:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 923 proven. 2 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2018-09-10 12:18:21,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:18:21,346 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:18:21,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:18:21,362 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:18:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:18:22,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:18:22,525 WARN L175 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 21 [2018-09-10 12:18:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 1480 proven. 2 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2018-09-10 12:18:22,984 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:18:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1969 backedges. 759 proven. 235 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2018-09-10 12:18:23,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:18:23,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-09-10 12:18:23,775 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:18:23,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:18:23,776 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:18:23,776 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:18:23,776 INFO L87 Difference]: Start difference. First operand 27463 states and 29935 transitions. Second operand 9 states. Received shutdown request... [2018-09-10 12:18:51,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-10 12:18:51,522 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:18:51,527 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:18:51,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:18:51 BoogieIcfgContainer [2018-09-10 12:18:51,527 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:18:51,528 INFO L168 Benchmark]: Toolchain (without parser) took 232802.48 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 3.6 GB in the end (delta: -2.1 GB). Peak memory consumption was 448.8 MB. Max. memory is 7.1 GB. [2018-09-10 12:18:51,529 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:18:51,529 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1272.96 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-09-10 12:18:51,530 INFO L168 Benchmark]: Boogie Procedure Inliner took 253.41 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: 42.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2018-09-10 12:18:51,531 INFO L168 Benchmark]: Boogie Preprocessor took 655.09 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 893.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. [2018-09-10 12:18:51,531 INFO L168 Benchmark]: RCFGBuilder took 8379.19 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 316.8 MB). Peak memory consumption was 316.8 MB. Max. memory is 7.1 GB. [2018-09-10 12:18:51,532 INFO L168 Benchmark]: TraceAbstraction took 222235.05 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 3.6 GB in the end (delta: -1.6 GB). Peak memory consumption was 124.2 MB. Max. memory is 7.1 GB. [2018-09-10 12:18:51,536 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 1272.96 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 253.41 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: 42.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 655.09 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 893.9 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8379.19 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 316.8 MB). Peak memory consumption was 316.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222235.05 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 3.6 GB in the end (delta: -1.6 GB). Peak memory consumption was 124.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 169]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 169). Cancelled while BasicCegarLoop was constructing difference of abstraction (27463states) and FLOYD_HOARE automaton (currently 35 states, 9 states before enhancement), while ReachableStatesComputation was computing reachable states (54950 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 222.1s OverallTime, 18 OverallIterations, 8 TraceHistogramMax, 143.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3669 SDtfs, 28600 SDslu, 3928 SDs, 0 SdLazy, 49758 SolverSat, 8741 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 123.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25506 GetRequests, 25235 SyntacticMatches, 39 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 33.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27463occurred in iteration=17, 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: 3.9s AutomataMinimizationTime, 17 MinimizatonAttempts, 8417 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 59.5s InterpolantComputationTime, 21841 NumberOfCodeBlocks, 21841 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 34405 ConstructedInterpolants, 1161 QuantifiedInterpolants, 99256987 SizeOfPredicates, 40 NumberOfNonLiveVariables, 17018 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 54 InterpolantComputations, 14 PerfectInterpolantSequences, 46128/48101 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/Problem15_label59_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-18-51-549.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label59_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-18-51-549.csv Completed graceful shutdown