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/Problem17_label12_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:24:20,200 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:24:20,202 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:24:20,221 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:24:20,221 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:24:20,223 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:24:20,224 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:24:20,226 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:24:20,228 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:24:20,229 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:24:20,230 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:24:20,230 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:24:20,231 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:24:20,232 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:24:20,233 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:24:20,234 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:24:20,235 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:24:20,237 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:24:20,239 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:24:20,241 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:24:20,243 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:24:20,244 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:24:20,247 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:24:20,247 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:24:20,247 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:24:20,248 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:24:20,249 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:24:20,250 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:24:20,251 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:24:20,254 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:24:20,255 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:24:20,256 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:24:20,256 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:24:20,256 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:24:20,259 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:24:20,260 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:24:20,261 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 12:24:20,282 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:24:20,282 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:24:20,284 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:24:20,284 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:24:20,284 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:24:20,285 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:24:20,285 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:24:20,285 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:24:20,285 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:24:20,286 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:24:20,286 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:24:20,287 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:24:20,287 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:24:20,287 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:24:20,287 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:24:20,288 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:24:20,288 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:24:20,288 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:24:20,289 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:24:20,289 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:24:20,289 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:24:20,289 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:24:20,289 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:24:20,290 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:24:20,290 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:24:20,290 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:24:20,290 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:24:20,292 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:24:20,292 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:24:20,293 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:24:20,293 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:24:20,293 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:24:20,293 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:24:20,344 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:24:20,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:24:20,369 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:24:20,371 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:24:20,372 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:24:20,373 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label12_true-unreach-call.c [2018-09-10 12:24:20,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/326db5948/b8c0e171fcba482db39c33dccb7beb05/FLAG2ccf889b7 [2018-09-10 12:24:21,074 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:24:21,075 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label12_true-unreach-call.c [2018-09-10 12:24:21,098 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/326db5948/b8c0e171fcba482db39c33dccb7beb05/FLAG2ccf889b7 [2018-09-10 12:24:21,115 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/326db5948/b8c0e171fcba482db39c33dccb7beb05 [2018-09-10 12:24:21,127 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:24:21,132 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:24:21,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:24:21,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:24:21,143 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:24:21,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:24:21" (1/1) ... [2018-09-10 12:24:21,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59918db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:21, skipping insertion in model container [2018-09-10 12:24:21,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:24:21" (1/1) ... [2018-09-10 12:24:21,488 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:24:22,224 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:24:22,245 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:24:22,843 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:24:23,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23 WrapperNode [2018-09-10 12:24:23,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:24:23,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:24:23,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:24:23,047 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:24:23,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (1/1) ... [2018-09-10 12:24:23,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (1/1) ... [2018-09-10 12:24:23,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:24:23,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:24:23,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:24:23,334 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:24:23,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (1/1) ... [2018-09-10 12:24:23,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (1/1) ... [2018-09-10 12:24:23,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (1/1) ... [2018-09-10 12:24:23,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (1/1) ... [2018-09-10 12:24:24,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (1/1) ... [2018-09-10 12:24:24,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (1/1) ... [2018-09-10 12:24:24,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (1/1) ... [2018-09-10 12:24:24,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:24:24,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:24:24,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:24:24,154 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:24:24,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (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 12:24:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:24:24,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:24:24,229 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 12:24:24,229 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 12:24:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:24:24,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:24:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:24:24,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:24:24,230 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 12:24:24,231 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 12:24:33,754 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:24:33,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:24:33 BoogieIcfgContainer [2018-09-10 12:24:33,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:24:33,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:24:33,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:24:33,762 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:24:33,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:24:21" (1/3) ... [2018-09-10 12:24:33,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204daf31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:24:33, skipping insertion in model container [2018-09-10 12:24:33,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:24:23" (2/3) ... [2018-09-10 12:24:33,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204daf31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:24:33, skipping insertion in model container [2018-09-10 12:24:33,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:24:33" (3/3) ... [2018-09-10 12:24:33,765 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label12_true-unreach-call.c [2018-09-10 12:24:33,775 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:24:33,785 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:24:33,844 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:24:33,845 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:24:33,845 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:24:33,845 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:24:33,845 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:24:33,845 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:24:33,845 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:24:33,846 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:24:33,846 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:24:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-09-10 12:24:33,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-10 12:24:33,892 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:24:33,894 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] [2018-09-10 12:24:33,895 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 12:24:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash 531044748, now seen corresponding path program 1 times [2018-09-10 12:24:33,904 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:24:33,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:24:33,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:24:33,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:24:33,952 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:24:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:24:34,390 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 12:24:34,394 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:24:34,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:24:34,395 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:24:34,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:24:34,417 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:24:34,418 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:24:34,421 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-09-10 12:24:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:24:46,181 INFO L93 Difference]: Finished difference Result 2139 states and 3961 transitions. [2018-09-10 12:24:46,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:24:46,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2018-09-10 12:24:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:24:46,216 INFO L225 Difference]: With dead ends: 2139 [2018-09-10 12:24:46,217 INFO L226 Difference]: Without dead ends: 1529 [2018-09-10 12:24:46,229 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 12:24:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-09-10 12:24:46,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2018-09-10 12:24:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2018-09-10 12:24:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2413 transitions. [2018-09-10 12:24:46,396 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2413 transitions. Word has length 40 [2018-09-10 12:24:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:24:46,397 INFO L480 AbstractCegarLoop]: Abstraction has 1527 states and 2413 transitions. [2018-09-10 12:24:46,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:24:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2413 transitions. [2018-09-10 12:24:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-10 12:24:46,407 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:24:46,408 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:24:46,408 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 12:24:46,408 INFO L82 PathProgramCache]: Analyzing trace with hash 865526589, now seen corresponding path program 1 times [2018-09-10 12:24:46,409 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:24:46,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:24:46,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:24:46,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:24:46,413 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:24:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:24:46,936 WARN L175 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 7 [2018-09-10 12:24:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:24:46,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:24:46,986 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 12:24:47,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:24:47,001 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:24:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:24:47,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:24:49,199 WARN L175 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 32 [2018-09-10 12:24:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:24:51,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:24:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:24:51,837 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:24:51,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 12 [2018-09-10 12:24:51,838 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:24:51,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:24:51,839 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:24:51,839 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2018-09-10 12:24:51,840 INFO L87 Difference]: Start difference. First operand 1527 states and 2413 transitions. Second operand 3 states. [2018-09-10 12:25:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:25:00,440 INFO L93 Difference]: Finished difference Result 4361 states and 7034 transitions. [2018-09-10 12:25:00,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:25:00,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2018-09-10 12:25:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:25:00,469 INFO L225 Difference]: With dead ends: 4361 [2018-09-10 12:25:00,469 INFO L226 Difference]: Without dead ends: 2840 [2018-09-10 12:25:00,478 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 224 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2018-09-10 12:25:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2018-09-10 12:25:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2835. [2018-09-10 12:25:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2835 states. [2018-09-10 12:25:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 4434 transitions. [2018-09-10 12:25:00,596 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 4434 transitions. Word has length 115 [2018-09-10 12:25:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:25:00,599 INFO L480 AbstractCegarLoop]: Abstraction has 2835 states and 4434 transitions. [2018-09-10 12:25:00,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:25:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 4434 transitions. [2018-09-10 12:25:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-10 12:25:00,615 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:25:00,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:00,616 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 12:25:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1507460293, now seen corresponding path program 1 times [2018-09-10 12:25:00,618 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:25:00,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:00,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:00,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:00,620 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:25:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:25:00,922 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:25:00,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:25:00,922 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:25:00,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:25:00,923 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:25:00,923 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:25:00,924 INFO L87 Difference]: Start difference. First operand 2835 states and 4434 transitions. Second operand 6 states. [2018-09-10 12:25:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:25:07,949 INFO L93 Difference]: Finished difference Result 8423 states and 13679 transitions. [2018-09-10 12:25:07,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:25:07,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2018-09-10 12:25:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:25:08,002 INFO L225 Difference]: With dead ends: 8423 [2018-09-10 12:25:08,003 INFO L226 Difference]: Without dead ends: 5594 [2018-09-10 12:25:08,017 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:25:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2018-09-10 12:25:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 5550. [2018-09-10 12:25:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5550 states. [2018-09-10 12:25:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 8251 transitions. [2018-09-10 12:25:08,223 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 8251 transitions. Word has length 156 [2018-09-10 12:25:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:25:08,223 INFO L480 AbstractCegarLoop]: Abstraction has 5550 states and 8251 transitions. [2018-09-10 12:25:08,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:25:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 8251 transitions. [2018-09-10 12:25:08,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-10 12:25:08,232 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:25:08,232 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:25:08,233 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 12:25:08,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1615222465, now seen corresponding path program 1 times [2018-09-10 12:25:08,233 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:25:08,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:08,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:08,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:08,235 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:25:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:08,692 WARN L175 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:25:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 67 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-10 12:25:08,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:08,845 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 12:25:08,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:08,855 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:08,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:25:09,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:25:09,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:09,267 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:25:09,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:09,285 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:09,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-10 12:25:09,556 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-10 12:25:09,978 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-09-10 12:25:09,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 12 [2018-09-10 12:25:09,978 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:25:09,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:25:09,979 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:25:09,980 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:25:09,980 INFO L87 Difference]: Start difference. First operand 5550 states and 8251 transitions. Second operand 5 states. [2018-09-10 12:25:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:25:15,416 INFO L93 Difference]: Finished difference Result 13329 states and 19833 transitions. [2018-09-10 12:25:15,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 12:25:15,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2018-09-10 12:25:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:25:15,453 INFO L225 Difference]: With dead ends: 13329 [2018-09-10 12:25:15,454 INFO L226 Difference]: Without dead ends: 7785 [2018-09-10 12:25:15,476 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 820 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:25:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2018-09-10 12:25:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7785. [2018-09-10 12:25:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7785 states. [2018-09-10 12:25:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7785 states to 7785 states and 10165 transitions. [2018-09-10 12:25:15,781 INFO L78 Accepts]: Start accepts. Automaton has 7785 states and 10165 transitions. Word has length 208 [2018-09-10 12:25:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:25:15,782 INFO L480 AbstractCegarLoop]: Abstraction has 7785 states and 10165 transitions. [2018-09-10 12:25:15,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:25:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7785 states and 10165 transitions. [2018-09-10 12:25:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-10 12:25:15,791 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:25:15,792 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:25:15,792 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 12:25:15,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1451809282, now seen corresponding path program 1 times [2018-09-10 12:25:15,793 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:25:15,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:15,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:15,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:15,794 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:25:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 66 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:25:16,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:16,226 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 12:25:16,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:16,235 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:16,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-10 12:25:16,528 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 66 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:25:16,994 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:25:16,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-10 12:25:16,995 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:25:16,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:25:16,995 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:25:16,996 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:25:16,996 INFO L87 Difference]: Start difference. First operand 7785 states and 10165 transitions. Second operand 5 states. [2018-09-10 12:25:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:25:29,482 INFO L93 Difference]: Finished difference Result 19165 states and 24586 transitions. [2018-09-10 12:25:29,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:25:29,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2018-09-10 12:25:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:25:29,527 INFO L225 Difference]: With dead ends: 19165 [2018-09-10 12:25:29,527 INFO L226 Difference]: Without dead ends: 10949 [2018-09-10 12:25:29,566 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:25:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10949 states. [2018-09-10 12:25:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10949 to 9764. [2018-09-10 12:25:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9764 states. [2018-09-10 12:25:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9764 states to 9764 states and 12461 transitions. [2018-09-10 12:25:29,924 INFO L78 Accepts]: Start accepts. Automaton has 9764 states and 12461 transitions. Word has length 227 [2018-09-10 12:25:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:25:29,924 INFO L480 AbstractCegarLoop]: Abstraction has 9764 states and 12461 transitions. [2018-09-10 12:25:29,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:25:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9764 states and 12461 transitions. [2018-09-10 12:25:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-10 12:25:29,933 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:25:29,933 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:25:29,934 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 12:25:29,934 INFO L82 PathProgramCache]: Analyzing trace with hash 634131817, now seen corresponding path program 1 times [2018-09-10 12:25:29,934 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:25:29,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:29,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:29,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:29,935 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:25:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:30,238 WARN L175 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:25:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 106 proven. 41 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-10 12:25:30,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:30,459 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 12:25:30,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:30,467 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:30,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:25:30,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:25:30,807 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:25:30,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-09-10 12:25:30,808 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:25:30,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:25:30,808 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:25:30,808 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:25:30,809 INFO L87 Difference]: Start difference. First operand 9764 states and 12461 transitions. Second operand 3 states. [2018-09-10 12:25:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:25:34,519 INFO L93 Difference]: Finished difference Result 19515 states and 25035 transitions. [2018-09-10 12:25:34,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:25:34,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 244 [2018-09-10 12:25:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:25:34,556 INFO L225 Difference]: With dead ends: 19515 [2018-09-10 12:25:34,556 INFO L226 Difference]: Without dead ends: 10191 [2018-09-10 12:25:34,586 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 488 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:25:34,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10191 states. [2018-09-10 12:25:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10191 to 9744. [2018-09-10 12:25:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9744 states. [2018-09-10 12:25:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9744 states to 9744 states and 11862 transitions. [2018-09-10 12:25:34,755 INFO L78 Accepts]: Start accepts. Automaton has 9744 states and 11862 transitions. Word has length 244 [2018-09-10 12:25:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:25:34,756 INFO L480 AbstractCegarLoop]: Abstraction has 9744 states and 11862 transitions. [2018-09-10 12:25:34,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:25:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 9744 states and 11862 transitions. [2018-09-10 12:25:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-10 12:25:34,767 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:25:34,768 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:34,768 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 12:25:34,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1865717331, now seen corresponding path program 1 times [2018-09-10 12:25:34,768 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:25:34,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:34,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:34,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:25:34,770 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:25:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:35,225 WARN L175 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-09-10 12:25:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 105 proven. 214 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-10 12:25:35,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:35,533 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:25:35,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:35,541 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:35,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 290 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-10 12:25:36,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 177 proven. 76 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-09-10 12:25:36,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:25:36,442 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:25:36,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:25:36,458 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:25:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:25:36,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:25:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-09-10 12:25:37,591 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:25:37,773 WARN L175 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-09-10 12:25:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 107 proven. 142 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-10 12:25:38,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:25:38,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 5, 5] total 18 [2018-09-10 12:25:38,254 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:25:38,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-10 12:25:38,256 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-10 12:25:38,256 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:25:38,256 INFO L87 Difference]: Start difference. First operand 9744 states and 11862 transitions. Second operand 12 states. [2018-09-10 12:26:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:26:05,212 INFO L93 Difference]: Finished difference Result 26218 states and 33161 transitions. [2018-09-10 12:26:05,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-10 12:26:05,214 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 302 [2018-09-10 12:26:05,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:26:05,260 INFO L225 Difference]: With dead ends: 26218 [2018-09-10 12:26:05,261 INFO L226 Difference]: Without dead ends: 12326 [2018-09-10 12:26:05,311 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1328 GetRequests, 1254 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=921, Invalid=4481, Unknown=0, NotChecked=0, Total=5402 [2018-09-10 12:26:05,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12326 states. [2018-09-10 12:26:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12326 to 11215. [2018-09-10 12:26:05,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11215 states. [2018-09-10 12:26:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11215 states to 11215 states and 12574 transitions. [2018-09-10 12:26:05,544 INFO L78 Accepts]: Start accepts. Automaton has 11215 states and 12574 transitions. Word has length 302 [2018-09-10 12:26:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:26:05,545 INFO L480 AbstractCegarLoop]: Abstraction has 11215 states and 12574 transitions. [2018-09-10 12:26:05,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-10 12:26:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 11215 states and 12574 transitions. [2018-09-10 12:26:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-09-10 12:26:05,557 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:26:05,558 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:05,558 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 12:26:05,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1835052585, now seen corresponding path program 1 times [2018-09-10 12:26:05,559 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:26:05,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:05,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:05,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:05,560 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:26:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:26:06,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:06,532 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 12:26:06,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:06,548 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:06,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:26:06,981 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:26:07,600 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:26:07,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-09-10 12:26:07,601 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:26:07,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:26:07,602 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:26:07,602 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:26:07,602 INFO L87 Difference]: Start difference. First operand 11215 states and 12574 transitions. Second operand 6 states. [2018-09-10 12:26:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:26:17,374 INFO L93 Difference]: Finished difference Result 34203 states and 39674 transitions. [2018-09-10 12:26:17,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 12:26:17,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 388 [2018-09-10 12:26:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:26:17,428 INFO L225 Difference]: With dead ends: 34203 [2018-09-10 12:26:17,428 INFO L226 Difference]: Without dead ends: 19234 [2018-09-10 12:26:17,460 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 775 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:26:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19234 states. [2018-09-10 12:26:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19234 to 18702. [2018-09-10 12:26:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18702 states. [2018-09-10 12:26:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18702 states to 18702 states and 21689 transitions. [2018-09-10 12:26:17,759 INFO L78 Accepts]: Start accepts. Automaton has 18702 states and 21689 transitions. Word has length 388 [2018-09-10 12:26:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:26:17,759 INFO L480 AbstractCegarLoop]: Abstraction has 18702 states and 21689 transitions. [2018-09-10 12:26:17,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:26:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 18702 states and 21689 transitions. [2018-09-10 12:26:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2018-09-10 12:26:17,780 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:26:17,781 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-09-10 12:26:17,781 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 12:26:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -123761929, now seen corresponding path program 1 times [2018-09-10 12:26:17,781 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:26:17,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:17,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:17,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:17,782 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:26:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2018-09-10 12:26:18,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:18,257 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:26:18,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:18,270 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:18,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2018-09-10 12:26:18,543 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2018-09-10 12:26:18,842 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:26:18,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-09-10 12:26:18,842 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:26:18,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:26:18,843 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:26:18,843 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:26:18,843 INFO L87 Difference]: Start difference. First operand 18702 states and 21689 transitions. Second operand 3 states. [2018-09-10 12:26:21,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:26:21,895 INFO L93 Difference]: Finished difference Result 41320 states and 48253 transitions. [2018-09-10 12:26:21,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:26:21,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2018-09-10 12:26:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:26:21,945 INFO L225 Difference]: With dead ends: 41320 [2018-09-10 12:26:21,946 INFO L226 Difference]: Without dead ends: 23064 [2018-09-10 12:26:21,971 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 993 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:26:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2018-09-10 12:26:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 20452. [2018-09-10 12:26:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20452 states. [2018-09-10 12:26:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20452 states to 20452 states and 23629 transitions. [2018-09-10 12:26:22,302 INFO L78 Accepts]: Start accepts. Automaton has 20452 states and 23629 transitions. Word has length 496 [2018-09-10 12:26:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:26:22,303 INFO L480 AbstractCegarLoop]: Abstraction has 20452 states and 23629 transitions. [2018-09-10 12:26:22,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:26:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 20452 states and 23629 transitions. [2018-09-10 12:26:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-09-10 12:26:22,323 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:26:22,324 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-09-10 12:26:22,324 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 12:26:22,324 INFO L82 PathProgramCache]: Analyzing trace with hash 545817968, now seen corresponding path program 1 times [2018-09-10 12:26:22,324 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:26:22,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:22,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:22,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:22,326 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:26:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2018-09-10 12:26:23,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:23,069 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 12:26:23,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:23,086 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:23,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-10 12:26:23,579 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-10 12:26:24,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:24,258 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:26:24,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:24,275 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:24,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-10 12:26:24,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 404 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-09-10 12:26:25,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:26:25,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-09-10 12:26:25,200 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:26:25,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:26:25,202 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:26:25,202 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:26:25,202 INFO L87 Difference]: Start difference. First operand 20452 states and 23629 transitions. Second operand 6 states. [2018-09-10 12:26:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:26:35,513 INFO L93 Difference]: Finished difference Result 46973 states and 54761 transitions. [2018-09-10 12:26:35,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:26:35,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 517 [2018-09-10 12:26:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:26:35,575 INFO L225 Difference]: With dead ends: 46973 [2018-09-10 12:26:35,575 INFO L226 Difference]: Without dead ends: 26968 [2018-09-10 12:26:35,602 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2083 GetRequests, 2069 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:26:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26968 states. [2018-09-10 12:26:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26968 to 23722. [2018-09-10 12:26:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23722 states. [2018-09-10 12:26:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23722 states to 23722 states and 27143 transitions. [2018-09-10 12:26:35,995 INFO L78 Accepts]: Start accepts. Automaton has 23722 states and 27143 transitions. Word has length 517 [2018-09-10 12:26:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:26:35,996 INFO L480 AbstractCegarLoop]: Abstraction has 23722 states and 27143 transitions. [2018-09-10 12:26:35,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:26:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 23722 states and 27143 transitions. [2018-09-10 12:26:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2018-09-10 12:26:36,023 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:26:36,024 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 12:26:36,024 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 12:26:36,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1946915764, now seen corresponding path program 1 times [2018-09-10 12:26:36,025 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:26:36,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:36,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:36,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:36,026 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:26:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2018-09-10 12:26:36,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:36,537 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:26:36,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:36,554 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:36,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2018-09-10 12:26:36,954 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2018-09-10 12:26:37,423 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:26:37,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-09-10 12:26:37,424 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:26:37,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:26:37,425 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:26:37,425 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:26:37,425 INFO L87 Difference]: Start difference. First operand 23722 states and 27143 transitions. Second operand 3 states. [2018-09-10 12:26:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:26:41,285 INFO L93 Difference]: Finished difference Result 57078 states and 66109 transitions. [2018-09-10 12:26:41,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:26:41,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 540 [2018-09-10 12:26:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:26:41,355 INFO L225 Difference]: With dead ends: 57078 [2018-09-10 12:26:41,355 INFO L226 Difference]: Without dead ends: 33803 [2018-09-10 12:26:41,387 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1080 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 12:26:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33803 states. [2018-09-10 12:26:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33803 to 30746. [2018-09-10 12:26:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30746 states. [2018-09-10 12:26:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30746 states to 30746 states and 35643 transitions. [2018-09-10 12:26:41,850 INFO L78 Accepts]: Start accepts. Automaton has 30746 states and 35643 transitions. Word has length 540 [2018-09-10 12:26:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:26:41,851 INFO L480 AbstractCegarLoop]: Abstraction has 30746 states and 35643 transitions. [2018-09-10 12:26:41,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:26:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 30746 states and 35643 transitions. [2018-09-10 12:26:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2018-09-10 12:26:41,871 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:26:41,871 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-09-10 12:26:41,872 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 12:26:41,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1285574970, now seen corresponding path program 1 times [2018-09-10 12:26:41,872 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:26:41,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:41,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:41,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:41,873 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:26:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-09-10 12:26:42,342 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:26:42,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:26:42,342 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:26:42,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:26:42,343 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:26:42,343 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:26:42,343 INFO L87 Difference]: Start difference. First operand 30746 states and 35643 transitions. Second operand 3 states. [2018-09-10 12:26:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:26:48,536 INFO L93 Difference]: Finished difference Result 68492 states and 80226 transitions. [2018-09-10 12:26:48,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:26:48,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 547 [2018-09-10 12:26:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:26:48,612 INFO L225 Difference]: With dead ends: 68492 [2018-09-10 12:26:48,612 INFO L226 Difference]: Without dead ends: 36915 [2018-09-10 12:26:48,651 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:26:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36915 states. [2018-09-10 12:26:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36915 to 36032. [2018-09-10 12:26:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36032 states. [2018-09-10 12:26:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36032 states to 36032 states and 42047 transitions. [2018-09-10 12:26:49,142 INFO L78 Accepts]: Start accepts. Automaton has 36032 states and 42047 transitions. Word has length 547 [2018-09-10 12:26:49,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:26:49,143 INFO L480 AbstractCegarLoop]: Abstraction has 36032 states and 42047 transitions. [2018-09-10 12:26:49,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:26:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 36032 states and 42047 transitions. [2018-09-10 12:26:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2018-09-10 12:26:49,205 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:26:49,206 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:26:49,206 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 12:26:49,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2004735999, now seen corresponding path program 1 times [2018-09-10 12:26:49,207 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:26:49,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:49,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:49,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:26:49,208 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:26:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 106 proven. 17 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-09-10 12:26:50,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:50,543 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 12:26:50,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:50,551 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:50,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 483 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:26:51,492 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 483 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 12:26:52,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:26:52,773 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 12:26:52,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:26:52,788 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:26:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:26:53,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:26:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 452 proven. 87 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-09-10 12:26:54,793 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:26:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 190 proven. 297 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-09-10 12:26:57,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:26:57,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6, 8, 6] total 25 [2018-09-10 12:26:57,652 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:26:57,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-10 12:26:57,654 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-10 12:26:57,655 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2018-09-10 12:26:57,655 INFO L87 Difference]: Start difference. First operand 36032 states and 42047 transitions. Second operand 13 states. [2018-09-10 12:27:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:27:19,950 INFO L93 Difference]: Finished difference Result 85427 states and 99964 transitions. [2018-09-10 12:27:19,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-10 12:27:19,951 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 837 [2018-09-10 12:27:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:27:20,051 INFO L225 Difference]: With dead ends: 85427 [2018-09-10 12:27:20,052 INFO L226 Difference]: Without dead ends: 49842 [2018-09-10 12:27:20,096 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3386 GetRequests, 3342 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2018-09-10 12:27:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49842 states. [2018-09-10 12:27:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49842 to 46552. [2018-09-10 12:27:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46552 states. [2018-09-10 12:27:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46552 states to 46552 states and 52794 transitions. [2018-09-10 12:27:20,720 INFO L78 Accepts]: Start accepts. Automaton has 46552 states and 52794 transitions. Word has length 837 [2018-09-10 12:27:20,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:27:20,721 INFO L480 AbstractCegarLoop]: Abstraction has 46552 states and 52794 transitions. [2018-09-10 12:27:20,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-10 12:27:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 46552 states and 52794 transitions. [2018-09-10 12:27:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2018-09-10 12:27:20,757 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:27:20,758 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:27:20,758 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 12:27:20,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1769851949, now seen corresponding path program 1 times [2018-09-10 12:27:20,758 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:27:20,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:20,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:20,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:20,760 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:27:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 143 proven. 378 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2018-09-10 12:27:21,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:27:21,880 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 12:27:21,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:21,889 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:27:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:22,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:27:22,730 WARN L175 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 29 [2018-09-10 12:27:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 627 proven. 5 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-09-10 12:27:23,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:27:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 627 proven. 5 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-09-10 12:27:25,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:27:25,080 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:27:25,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:25,098 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:27:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:25,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:27:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 457 proven. 87 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-09-10 12:27:26,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:27:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 228 proven. 212 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-09-10 12:27:26,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:27:26,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 8, 5] total 17 [2018-09-10 12:27:26,893 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:27:26,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-10 12:27:26,895 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-10 12:27:26,895 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:27:26,895 INFO L87 Difference]: Start difference. First operand 46552 states and 52794 transitions. Second operand 10 states. [2018-09-10 12:27:36,032 WARN L175 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-09-10 12:27:43,013 WARN L175 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2018-09-10 12:27:45,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:27:45,805 INFO L93 Difference]: Finished difference Result 108647 states and 124332 transitions. [2018-09-10 12:27:45,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-10 12:27:45,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 859 [2018-09-10 12:27:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:27:45,928 INFO L225 Difference]: With dead ends: 108647 [2018-09-10 12:27:45,928 INFO L226 Difference]: Without dead ends: 64287 [2018-09-10 12:27:45,979 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3506 GetRequests, 3451 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=459, Invalid=1991, Unknown=0, NotChecked=0, Total=2450 [2018-09-10 12:27:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64287 states. [2018-09-10 12:27:46,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64287 to 63116. [2018-09-10 12:27:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63116 states. [2018-09-10 12:27:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63116 states to 63116 states and 70938 transitions. [2018-09-10 12:27:46,958 INFO L78 Accepts]: Start accepts. Automaton has 63116 states and 70938 transitions. Word has length 859 [2018-09-10 12:27:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:27:46,959 INFO L480 AbstractCegarLoop]: Abstraction has 63116 states and 70938 transitions. [2018-09-10 12:27:46,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-10 12:27:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 63116 states and 70938 transitions. [2018-09-10 12:27:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1003 [2018-09-10 12:27:47,012 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:27:47,013 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 12:27:47,013 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 12:27:47,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1151528463, now seen corresponding path program 1 times [2018-09-10 12:27:47,014 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:27:47,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:47,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:47,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:47,015 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:27:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 189 proven. 5 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2018-09-10 12:27:47,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:27:47,984 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 12:27:47,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:47,992 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:27:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:48,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:27:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 1016 proven. 0 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2018-09-10 12:27:49,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:27:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 199 proven. 13 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2018-09-10 12:27:49,534 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:27:49,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2018-09-10 12:27:49,535 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:27:49,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:27:49,535 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:27:49,536 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:27:49,536 INFO L87 Difference]: Start difference. First operand 63116 states and 70938 transitions. Second operand 3 states. [2018-09-10 12:27:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:27:51,714 INFO L93 Difference]: Finished difference Result 120012 states and 135073 transitions. [2018-09-10 12:27:51,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:27:51,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1002 [2018-09-10 12:27:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:27:51,820 INFO L225 Difference]: With dead ends: 120012 [2018-09-10 12:27:51,820 INFO L226 Difference]: Without dead ends: 59530 [2018-09-10 12:27:51,878 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2007 GetRequests, 1999 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:27:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59530 states. [2018-09-10 12:27:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59530 to 59524. [2018-09-10 12:27:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59524 states. [2018-09-10 12:27:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59524 states to 59524 states and 66713 transitions. [2018-09-10 12:27:53,022 INFO L78 Accepts]: Start accepts. Automaton has 59524 states and 66713 transitions. Word has length 1002 [2018-09-10 12:27:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:27:53,023 INFO L480 AbstractCegarLoop]: Abstraction has 59524 states and 66713 transitions. [2018-09-10 12:27:53,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:27:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 59524 states and 66713 transitions. [2018-09-10 12:27:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1042 [2018-09-10 12:27:53,083 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:27:53,083 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:27:53,084 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 12:27:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1385846862, now seen corresponding path program 1 times [2018-09-10 12:27:53,084 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:27:53,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:53,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:53,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:27:53,086 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:27:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1919 backedges. 234 proven. 6 refuted. 0 times theorem prover too weak. 1679 trivial. 0 not checked. [2018-09-10 12:27:54,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:27:54,061 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:27:54,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:27:54,075 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:27:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:27:54,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:27:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1919 backedges. 1143 proven. 0 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2018-09-10 12:27:55,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:27:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1919 backedges. 234 proven. 6 refuted. 0 times theorem prover too weak. 1679 trivial. 0 not checked. [2018-09-10 12:27:56,407 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:27:56,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-09-10 12:27:56,407 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:27:56,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:27:56,408 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:27:56,408 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:27:56,408 INFO L87 Difference]: Start difference. First operand 59524 states and 66713 transitions. Second operand 3 states. [2018-09-10 12:28:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:28:00,868 INFO L93 Difference]: Finished difference Result 125532 states and 141354 transitions. [2018-09-10 12:28:00,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:28:00,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1041 [2018-09-10 12:28:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:28:00,997 INFO L225 Difference]: With dead ends: 125532 [2018-09-10 12:28:00,997 INFO L226 Difference]: Without dead ends: 68643 [2018-09-10 12:28:01,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2084 GetRequests, 2083 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:28:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68643 states. [2018-09-10 12:28:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68643 to 67334. [2018-09-10 12:28:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67334 states. [2018-09-10 12:28:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67334 states to 67334 states and 74832 transitions. [2018-09-10 12:28:01,697 INFO L78 Accepts]: Start accepts. Automaton has 67334 states and 74832 transitions. Word has length 1041 [2018-09-10 12:28:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:28:01,698 INFO L480 AbstractCegarLoop]: Abstraction has 67334 states and 74832 transitions. [2018-09-10 12:28:01,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:28:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 67334 states and 74832 transitions. [2018-09-10 12:28:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2018-09-10 12:28:01,744 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:28:01,745 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:28:01,745 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 12:28:01,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1895784990, now seen corresponding path program 1 times [2018-09-10 12:28:01,746 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:28:01,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:28:01,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:28:01,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:28:01,746 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:28:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:28:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 189 proven. 5 refuted. 0 times theorem prover too weak. 1373 trivial. 0 not checked. [2018-09-10 12:28:03,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:28:03,378 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-10 12:28:03,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:28:03,392 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:28:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:28:03,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:28:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 832 proven. 0 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2018-09-10 12:28:04,170 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:28:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 189 proven. 5 refuted. 0 times theorem prover too weak. 1373 trivial. 0 not checked. [2018-09-10 12:28:05,036 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:28:05,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-09-10 12:28:05,037 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:28:05,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:28:05,038 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:28:05,038 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:28:05,038 INFO L87 Difference]: Start difference. First operand 67334 states and 74832 transitions. Second operand 3 states. [2018-09-10 12:28:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:28:08,804 INFO L93 Difference]: Finished difference Result 131081 states and 146445 transitions. [2018-09-10 12:28:08,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:28:08,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1099 [2018-09-10 12:28:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:28:08,943 INFO L225 Difference]: With dead ends: 131081 [2018-09-10 12:28:08,943 INFO L226 Difference]: Without dead ends: 71674 [2018-09-10 12:28:09,003 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2200 GetRequests, 2199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:28:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71674 states. [2018-09-10 12:28:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71674 to 69054. [2018-09-10 12:28:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69054 states. [2018-09-10 12:28:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69054 states to 69054 states and 76178 transitions. [2018-09-10 12:28:09,777 INFO L78 Accepts]: Start accepts. Automaton has 69054 states and 76178 transitions. Word has length 1099 [2018-09-10 12:28:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:28:09,778 INFO L480 AbstractCegarLoop]: Abstraction has 69054 states and 76178 transitions. [2018-09-10 12:28:09,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:28:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 69054 states and 76178 transitions. [2018-09-10 12:28:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1115 [2018-09-10 12:28:09,833 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:28:09,834 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:28:09,834 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 12:28:09,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1719478638, now seen corresponding path program 1 times [2018-09-10 12:28:09,834 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:28:09,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:28:09,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:28:09,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:28:09,836 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:28:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-10 12:28:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 221 proven. 897 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2018-09-10 12:28:13,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:28:13,217 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:28:13,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:28:13,225 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:28:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:28:13,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:28:13,633 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-10 12:28:13,834 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:28:13,835 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:28:13,840 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:28:13,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:28:13 BoogieIcfgContainer [2018-09-10 12:28:13,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:28:13,841 INFO L168 Benchmark]: Toolchain (without parser) took 232713.59 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -943.9 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-09-10 12:28:13,842 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:28:13,842 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1910.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Peak memory consumption was 190.3 MB. Max. memory is 7.1 GB. [2018-09-10 12:28:13,843 INFO L168 Benchmark]: Boogie Procedure Inliner took 286.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-10 12:28:13,843 INFO L168 Benchmark]: Boogie Preprocessor took 819.59 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 941.6 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.5 MB. Max. memory is 7.1 GB. [2018-09-10 12:28:13,844 INFO L168 Benchmark]: RCFGBuilder took 9602.07 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 496.3 MB). Peak memory consumption was 496.3 MB. Max. memory is 7.1 GB. [2018-09-10 12:28:13,845 INFO L168 Benchmark]: TraceAbstraction took 220083.78 ms. Allocated memory was 2.5 GB in the beginning and 4.0 GB in the end (delta: 1.5 GB). Free memory was 1.9 GB in the beginning and 2.4 GB in the end (delta: -506.7 MB). Peak memory consumption was 977.0 MB. Max. memory is 7.1 GB. [2018-09-10 12:28:13,849 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1910.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Peak memory consumption was 190.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 286.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 819.59 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 941.6 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9602.07 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 496.3 MB). Peak memory consumption was 496.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220083.78 ms. Allocated memory was 2.5 GB in the beginning and 4.0 GB in the end (delta: 1.5 GB). Free memory was 1.9 GB in the beginning and 2.4 GB in the end (delta: -506.7 MB). Peak memory consumption was 977.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 107). Cancelled while BasicCegarLoop was analyzing trace of length 1115 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 15 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 220.0s OverallTime, 18 OverallIterations, 7 TraceHistogramMax, 162.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5575 SDtfs, 32078 SDslu, 3947 SDs, 0 SdLazy, 52852 SolverSat, 9902 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 137.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21517 GetRequests, 21237 SyntacticMatches, 46 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2711 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69054occurred 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: 7.6s AutomataMinimizationTime, 17 MinimizatonAttempts, 21520 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 5.7s SatisfiabilityAnalysisTime, 33.7s InterpolantComputationTime, 19216 NumberOfCodeBlocks, 19216 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 29759 ConstructedInterpolants, 62 QuantifiedInterpolants, 54564684 SizeOfPredicates, 36 NumberOfNonLiveVariables, 15556 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 55 InterpolantComputations, 14 PerfectInterpolantSequences, 31942/33852 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/Problem17_label12_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-28-13-869.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label12_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-28-13-869.csv Completed graceful shutdown