java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:09:32,200 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:09:32,202 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:09:32,220 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:09:32,220 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:09:32,222 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:09:32,223 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:09:32,226 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:09:32,228 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:09:32,234 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:09:32,235 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:09:32,235 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:09:32,241 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:09:32,243 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:09:32,244 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:09:32,246 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:09:32,248 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:09:32,249 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:09:32,255 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:09:32,256 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:09:32,259 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:09:32,261 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:09:32,264 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:09:32,265 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:09:32,265 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:09:32,267 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:09:32,268 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:09:32,269 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:09:32,270 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:09:32,271 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:09:32,273 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:09:32,274 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:09:32,276 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:09:32,276 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:09:32,278 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:09:32,278 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:09:32,279 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 12:09:32,306 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:09:32,306 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:09:32,307 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:09:32,307 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:09:32,307 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:09:32,308 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:09:32,308 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:09:32,308 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:09:32,309 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:09:32,309 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:09:32,309 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:09:32,310 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:09:32,310 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:09:32,310 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:09:32,311 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:09:32,311 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:09:32,311 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:09:32,311 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:09:32,313 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:09:32,313 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:09:32,313 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:09:32,314 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:09:32,314 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:09:32,314 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:09:32,314 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:09:32,314 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:09:32,315 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:09:32,315 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:09:32,315 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:09:32,315 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:09:32,315 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:09:32,316 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:09:32,316 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:09:32,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:09:32,379 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:09:32,384 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:09:32,385 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:09:32,386 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:09:32,387 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19_true-unreach-call.c [2018-09-10 12:09:32,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed8665ea8/b94446ddcb044bdb9c1b7df39df05678/FLAGc50622941 [2018-09-10 12:09:33,100 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:09:33,101 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label19_true-unreach-call.c [2018-09-10 12:09:33,129 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed8665ea8/b94446ddcb044bdb9c1b7df39df05678/FLAGc50622941 [2018-09-10 12:09:33,149 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed8665ea8/b94446ddcb044bdb9c1b7df39df05678 [2018-09-10 12:09:33,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:09:33,163 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:09:33,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:09:33,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:09:33,170 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:09:33,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:09:33" (1/1) ... [2018-09-10 12:09:33,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6652310c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:33, skipping insertion in model container [2018-09-10 12:09:33,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:09:33" (1/1) ... [2018-09-10 12:09:33,449 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:09:34,039 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:09:34,059 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:09:34,361 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:09:34,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34 WrapperNode [2018-09-10 12:09:34,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:09:34,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:09:34,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:09:34,500 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:09:34,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (1/1) ... [2018-09-10 12:09:34,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (1/1) ... [2018-09-10 12:09:34,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:09:34,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:09:34,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:09:34,762 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:09:35,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (1/1) ... [2018-09-10 12:09:35,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (1/1) ... [2018-09-10 12:09:35,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (1/1) ... [2018-09-10 12:09:35,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (1/1) ... [2018-09-10 12:09:35,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (1/1) ... [2018-09-10 12:09:35,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (1/1) ... [2018-09-10 12:09:35,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (1/1) ... [2018-09-10 12:09:35,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:09:35,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:09:35,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:09:35,433 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:09:35,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (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 12:09:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:09:35,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:09:35,512 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 12:09:35,512 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 12:09:35,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:09:35,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:09:35,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:09:35,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:09:35,513 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 12:09:35,513 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 12:09:44,415 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:09:44,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:09:44 BoogieIcfgContainer [2018-09-10 12:09:44,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:09:44,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:09:44,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:09:44,420 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:09:44,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:09:33" (1/3) ... [2018-09-10 12:09:44,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f71f42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:09:44, skipping insertion in model container [2018-09-10 12:09:44,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:09:34" (2/3) ... [2018-09-10 12:09:44,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f71f42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:09:44, skipping insertion in model container [2018-09-10 12:09:44,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:09:44" (3/3) ... [2018-09-10 12:09:44,424 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label19_true-unreach-call.c [2018-09-10 12:09:44,433 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:09:44,441 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:09:44,497 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:09:44,498 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:09:44,498 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:09:44,498 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:09:44,498 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:09:44,498 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:09:44,498 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:09:44,499 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:09:44,499 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:09:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-09-10 12:09:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-10 12:09:44,542 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:09:44,543 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:09:44,544 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 12:09:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1934752060, now seen corresponding path program 1 times [2018-09-10 12:09:44,552 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:09:44,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:09:44,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:09:44,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:09:44,608 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:09:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:45,094 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 12:09:45,096 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:09:45,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:09:45,097 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:09:45,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:09:45,123 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:09:45,123 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:09:45,126 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-09-10 12:09:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:09:54,099 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-09-10 12:09:54,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:09:54,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-09-10 12:09:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:09:54,131 INFO L225 Difference]: With dead ends: 1558 [2018-09-10 12:09:54,131 INFO L226 Difference]: Without dead ends: 1114 [2018-09-10 12:09:54,145 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 12:09:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-09-10 12:09:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 759. [2018-09-10 12:09:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2018-09-10 12:09:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1355 transitions. [2018-09-10 12:09:54,293 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1355 transitions. Word has length 52 [2018-09-10 12:09:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:09:54,294 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 1355 transitions. [2018-09-10 12:09:54,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:09:54,294 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1355 transitions. [2018-09-10 12:09:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-10 12:09:54,305 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:09:54,305 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:09:54,305 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 12:09:54,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1475557671, now seen corresponding path program 1 times [2018-09-10 12:09:54,306 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:09:54,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:09:54,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:09:54,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:09:54,308 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:09:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:09:54,618 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:09:54,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-10 12:09:54,618 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:09:54,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:09:54,620 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:09:54,620 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-10 12:09:54,621 INFO L87 Difference]: Start difference. First operand 759 states and 1355 transitions. Second operand 5 states. [2018-09-10 12:10:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:10:09,581 INFO L93 Difference]: Finished difference Result 2506 states and 4577 transitions. [2018-09-10 12:10:09,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:10:09,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2018-09-10 12:10:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:10:09,602 INFO L225 Difference]: With dead ends: 2506 [2018-09-10 12:10:09,603 INFO L226 Difference]: Without dead ends: 1753 [2018-09-10 12:10:09,608 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-10 12:10:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2018-09-10 12:10:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1733. [2018-09-10 12:10:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-09-10 12:10:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 3007 transitions. [2018-09-10 12:10:09,700 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 3007 transitions. Word has length 122 [2018-09-10 12:10:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:10:09,701 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 3007 transitions. [2018-09-10 12:10:09,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:10:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 3007 transitions. [2018-09-10 12:10:09,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-10 12:10:09,713 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:10:09,713 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:10:09,713 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 12:10:09,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1640134226, now seen corresponding path program 1 times [2018-09-10 12:10:09,714 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:10:09,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:09,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:09,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:09,716 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:10:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:10,046 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:10:10,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:10:10,046 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:10:10,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:10:10,047 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:10:10,047 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:10:10,048 INFO L87 Difference]: Start difference. First operand 1733 states and 3007 transitions. Second operand 6 states. [2018-09-10 12:10:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:10:16,965 INFO L93 Difference]: Finished difference Result 4810 states and 8533 transitions. [2018-09-10 12:10:16,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 12:10:16,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2018-09-10 12:10:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:10:16,985 INFO L225 Difference]: With dead ends: 4810 [2018-09-10 12:10:16,985 INFO L226 Difference]: Without dead ends: 3083 [2018-09-10 12:10:16,992 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:10:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3083 states. [2018-09-10 12:10:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3083 to 2951. [2018-09-10 12:10:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2951 states. [2018-09-10 12:10:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 4527 transitions. [2018-09-10 12:10:17,090 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 4527 transitions. Word has length 123 [2018-09-10 12:10:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:10:17,091 INFO L480 AbstractCegarLoop]: Abstraction has 2951 states and 4527 transitions. [2018-09-10 12:10:17,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:10:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 4527 transitions. [2018-09-10 12:10:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-10 12:10:17,093 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:10:17,093 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:10:17,094 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 12:10:17,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1155586522, now seen corresponding path program 1 times [2018-09-10 12:10:17,094 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:10:17,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:17,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:17,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:17,099 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:10:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:17,380 WARN L175 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:10:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:17,619 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:10:17,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:10:17,620 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:10:17,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:10:17,621 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:10:17,621 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:10:17,621 INFO L87 Difference]: Start difference. First operand 2951 states and 4527 transitions. Second operand 6 states. [2018-09-10 12:10:23,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:10:23,579 INFO L93 Difference]: Finished difference Result 8979 states and 14291 transitions. [2018-09-10 12:10:23,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:10:23,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2018-09-10 12:10:23,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:10:23,617 INFO L225 Difference]: With dead ends: 8979 [2018-09-10 12:10:23,617 INFO L226 Difference]: Without dead ends: 6034 [2018-09-10 12:10:23,640 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:10:23,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2018-09-10 12:10:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 5729. [2018-09-10 12:10:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5729 states. [2018-09-10 12:10:23,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 8161 transitions. [2018-09-10 12:10:23,792 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 8161 transitions. Word has length 127 [2018-09-10 12:10:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:10:23,792 INFO L480 AbstractCegarLoop]: Abstraction has 5729 states and 8161 transitions. [2018-09-10 12:10:23,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:10:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 8161 transitions. [2018-09-10 12:10:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-10 12:10:23,795 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:10:23,796 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:10:23,796 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 12:10:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash 574148709, now seen corresponding path program 1 times [2018-09-10 12:10:23,796 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:10:23,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:23,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:23,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:23,798 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:10:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:24,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:10:24,084 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 12:10:24,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:24,093 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:10:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:24,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:10:28,273 WARN L175 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 37 [2018-09-10 12:10:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:30,710 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:10:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:31,130 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:10:31,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-09-10 12:10:31,131 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:10:31,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:10:31,132 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:10:31,132 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-09-10 12:10:31,132 INFO L87 Difference]: Start difference. First operand 5729 states and 8161 transitions. Second operand 3 states. [2018-09-10 12:10:35,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:10:35,162 INFO L93 Difference]: Finished difference Result 16801 states and 24422 transitions. [2018-09-10 12:10:35,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:10:35,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2018-09-10 12:10:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:10:35,215 INFO L225 Difference]: With dead ends: 16801 [2018-09-10 12:10:35,215 INFO L226 Difference]: Without dead ends: 8346 [2018-09-10 12:10:35,262 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-09-10 12:10:35,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2018-09-10 12:10:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 8325. [2018-09-10 12:10:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8325 states. [2018-09-10 12:10:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 10598 transitions. [2018-09-10 12:10:35,459 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 10598 transitions. Word has length 148 [2018-09-10 12:10:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:10:35,460 INFO L480 AbstractCegarLoop]: Abstraction has 8325 states and 10598 transitions. [2018-09-10 12:10:35,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:10:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 10598 transitions. [2018-09-10 12:10:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-10 12:10:35,467 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:10:35,467 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:10:35,468 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 12:10:35,468 INFO L82 PathProgramCache]: Analyzing trace with hash -782543335, now seen corresponding path program 1 times [2018-09-10 12:10:35,468 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:10:35,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:35,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:35,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:35,470 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:10:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:36,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:10:36,019 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 12:10:36,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:36,034 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:10:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:36,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:10:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:36,503 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:10:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:37,479 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:10:37,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2018-09-10 12:10:37,480 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:10:37,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:10:37,480 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:10:37,481 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:10:37,481 INFO L87 Difference]: Start difference. First operand 8325 states and 10598 transitions. Second operand 5 states. [2018-09-10 12:10:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:10:48,820 INFO L93 Difference]: Finished difference Result 19103 states and 24709 transitions. [2018-09-10 12:10:48,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:10:48,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2018-09-10 12:10:48,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:10:48,887 INFO L225 Difference]: With dead ends: 19103 [2018-09-10 12:10:48,887 INFO L226 Difference]: Without dead ends: 10784 [2018-09-10 12:10:48,926 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 437 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:10:48,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10784 states. [2018-09-10 12:10:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10784 to 10363. [2018-09-10 12:10:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10363 states. [2018-09-10 12:10:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 13168 transitions. [2018-09-10 12:10:49,199 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 13168 transitions. Word has length 220 [2018-09-10 12:10:49,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:10:49,199 INFO L480 AbstractCegarLoop]: Abstraction has 10363 states and 13168 transitions. [2018-09-10 12:10:49,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:10:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 13168 transitions. [2018-09-10 12:10:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-10 12:10:49,204 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:10:49,205 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:10:49,205 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 12:10:49,206 INFO L82 PathProgramCache]: Analyzing trace with hash 96770744, now seen corresponding path program 1 times [2018-09-10 12:10:49,206 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:10:49,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:49,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:49,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:49,207 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:10:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:49,832 WARN L175 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-09-10 12:10:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:50,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:10:50,233 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:10:50,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:50,248 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:10:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:50,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:10:52,680 WARN L175 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 38 [2018-09-10 12:10:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:52,786 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:10:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:10:56,289 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:10:56,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-09-10 12:10:56,290 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:10:56,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:10:56,291 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:10:56,291 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-09-10 12:10:56,292 INFO L87 Difference]: Start difference. First operand 10363 states and 13168 transitions. Second operand 6 states. [2018-09-10 12:11:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:11:32,530 INFO L93 Difference]: Finished difference Result 24967 states and 32836 transitions. [2018-09-10 12:11:32,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 12:11:32,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 290 [2018-09-10 12:11:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:11:32,593 INFO L225 Difference]: With dead ends: 24967 [2018-09-10 12:11:32,593 INFO L226 Difference]: Without dead ends: 14606 [2018-09-10 12:11:32,623 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 575 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2018-09-10 12:11:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14606 states. [2018-09-10 12:11:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14606 to 14374. [2018-09-10 12:11:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14374 states. [2018-09-10 12:11:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14374 states to 14374 states and 18943 transitions. [2018-09-10 12:11:32,944 INFO L78 Accepts]: Start accepts. Automaton has 14374 states and 18943 transitions. Word has length 290 [2018-09-10 12:11:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:11:32,944 INFO L480 AbstractCegarLoop]: Abstraction has 14374 states and 18943 transitions. [2018-09-10 12:11:32,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:11:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 14374 states and 18943 transitions. [2018-09-10 12:11:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-10 12:11:32,950 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:11:32,951 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:11:32,951 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 12:11:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1068219714, now seen corresponding path program 1 times [2018-09-10 12:11:32,952 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:11:32,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:11:32,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:11:32,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:11:32,953 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:11:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:11:33,381 WARN L175 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:11:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:11:33,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:11:33,710 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 12:11:33,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:11:33,717 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:11:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:11:33,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:11:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 12:11:34,063 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:11:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 12:11:34,448 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:11:34,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 11 [2018-09-10 12:11:34,448 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:11:34,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:11:34,449 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:11:34,449 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:11:34,449 INFO L87 Difference]: Start difference. First operand 14374 states and 18943 transitions. Second operand 4 states. [2018-09-10 12:11:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:11:38,091 INFO L93 Difference]: Finished difference Result 36435 states and 49779 transitions. [2018-09-10 12:11:38,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:11:38,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2018-09-10 12:11:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:11:38,199 INFO L225 Difference]: With dead ends: 36435 [2018-09-10 12:11:38,200 INFO L226 Difference]: Without dead ends: 22067 [2018-09-10 12:11:38,278 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 652 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:11:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22067 states. [2018-09-10 12:11:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22067 to 22060. [2018-09-10 12:11:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22060 states. [2018-09-10 12:11:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22060 states to 22060 states and 28673 transitions. [2018-09-10 12:11:38,733 INFO L78 Accepts]: Start accepts. Automaton has 22060 states and 28673 transitions. Word has length 327 [2018-09-10 12:11:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:11:38,734 INFO L480 AbstractCegarLoop]: Abstraction has 22060 states and 28673 transitions. [2018-09-10 12:11:38,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:11:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 22060 states and 28673 transitions. [2018-09-10 12:11:38,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2018-09-10 12:11:38,751 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:11:38,752 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:11:38,752 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 12:11:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1193974972, now seen corresponding path program 1 times [2018-09-10 12:11:38,753 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:11:38,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:11:38,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:11:38,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:11:38,754 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:11:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:11:39,226 WARN L175 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:11:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 85 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:11:40,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:11:40,499 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 12:11:40,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:11:40,512 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:11:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:11:40,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:11:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-09-10 12:11:40,744 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:11:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-09-10 12:11:40,914 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:11:40,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2018-09-10 12:11:40,914 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:11:40,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:11:40,915 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:11:40,915 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:11:40,916 INFO L87 Difference]: Start difference. First operand 22060 states and 28673 transitions. Second operand 3 states. [2018-09-10 12:11:44,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:11:44,753 INFO L93 Difference]: Finished difference Result 51625 states and 68993 transitions. [2018-09-10 12:11:44,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:11:44,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 439 [2018-09-10 12:11:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:11:44,865 INFO L225 Difference]: With dead ends: 51625 [2018-09-10 12:11:44,866 INFO L226 Difference]: Without dead ends: 29880 [2018-09-10 12:11:44,990 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 879 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:11:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29880 states. [2018-09-10 12:11:45,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29880 to 28295. [2018-09-10 12:11:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28295 states. [2018-09-10 12:11:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28295 states to 28295 states and 35815 transitions. [2018-09-10 12:11:45,561 INFO L78 Accepts]: Start accepts. Automaton has 28295 states and 35815 transitions. Word has length 439 [2018-09-10 12:11:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:11:45,561 INFO L480 AbstractCegarLoop]: Abstraction has 28295 states and 35815 transitions. [2018-09-10 12:11:45,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:11:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 28295 states and 35815 transitions. [2018-09-10 12:11:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2018-09-10 12:11:45,616 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:11:45,616 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:11:45,617 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 12:11:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1177729253, now seen corresponding path program 1 times [2018-09-10 12:11:45,617 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:11:45,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:11:45,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:11:45,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:11:45,618 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:11:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:11:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 224 proven. 85 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-09-10 12:11:46,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:11:46,706 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) [2018-09-10 12:11:46,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:11:46,716 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:11:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:11:46,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:11:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 374 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-09-10 12:11:47,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:11:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 224 proven. 85 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-09-10 12:11:47,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:11:47,422 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 12:11:47,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:11:47,437 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:11:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:11:47,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:11:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 374 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-09-10 12:11:48,119 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:11:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 224 proven. 85 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-09-10 12:11:49,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:11:49,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-10 12:11:49,031 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:11:49,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:11:49,034 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:11:49,035 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:11:49,035 INFO L87 Difference]: Start difference. First operand 28295 states and 35815 transitions. Second operand 9 states. [2018-09-10 12:11:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:11:57,220 INFO L93 Difference]: Finished difference Result 69210 states and 97671 transitions. [2018-09-10 12:11:57,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-10 12:11:57,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 528 [2018-09-10 12:11:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:11:57,501 INFO L225 Difference]: With dead ends: 69210 [2018-09-10 12:11:57,502 INFO L226 Difference]: Without dead ends: 41230 [2018-09-10 12:11:57,768 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2134 GetRequests, 2112 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:11:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41230 states. [2018-09-10 12:11:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41230 to 37982. [2018-09-10 12:11:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37982 states. [2018-09-10 12:11:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37982 states to 37982 states and 48754 transitions. [2018-09-10 12:11:59,072 INFO L78 Accepts]: Start accepts. Automaton has 37982 states and 48754 transitions. Word has length 528 [2018-09-10 12:11:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:11:59,072 INFO L480 AbstractCegarLoop]: Abstraction has 37982 states and 48754 transitions. [2018-09-10 12:11:59,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:11:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 37982 states and 48754 transitions. [2018-09-10 12:11:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2018-09-10 12:11:59,166 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:11:59,167 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:11:59,167 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 12:11:59,168 INFO L82 PathProgramCache]: Analyzing trace with hash 890496291, now seen corresponding path program 1 times [2018-09-10 12:11:59,168 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:11:59,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:11:59,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:11:59,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:11:59,169 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:11:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:12:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 363 proven. 85 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-09-10 12:12:00,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:12:00,074 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 12:12:00,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:12:00,092 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:12:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:12:00,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:12:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 620 proven. 2 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-10 12:12:00,716 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:12:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 363 proven. 85 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-09-10 12:12:01,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:12:01,331 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:12:01,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:12:01,351 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:12:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:12:01,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:12:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 620 proven. 2 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-09-10 12:12:02,126 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:12:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 363 proven. 85 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-09-10 12:12:02,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:12:02,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-10 12:12:02,457 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:12:02,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:12:02,458 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:12:02,458 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:12:02,459 INFO L87 Difference]: Start difference. First operand 37982 states and 48754 transitions. Second operand 9 states. [2018-09-10 12:12:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:12:10,293 INFO L93 Difference]: Finished difference Result 80180 states and 107076 transitions. [2018-09-10 12:12:10,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-10 12:12:10,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 640 [2018-09-10 12:12:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:12:10,564 INFO L225 Difference]: With dead ends: 80180 [2018-09-10 12:12:10,565 INFO L226 Difference]: Without dead ends: 42513 [2018-09-10 12:12:10,895 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2582 GetRequests, 2560 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:12:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42513 states. [2018-09-10 12:12:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42513 to 42420. [2018-09-10 12:12:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42420 states. [2018-09-10 12:12:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42420 states to 42420 states and 53721 transitions. [2018-09-10 12:12:12,097 INFO L78 Accepts]: Start accepts. Automaton has 42420 states and 53721 transitions. Word has length 640 [2018-09-10 12:12:12,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:12:12,098 INFO L480 AbstractCegarLoop]: Abstraction has 42420 states and 53721 transitions. [2018-09-10 12:12:12,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:12:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 42420 states and 53721 transitions. [2018-09-10 12:12:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2018-09-10 12:12:12,124 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:12:12,124 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:12:12,125 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 12:12:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1216784753, now seen corresponding path program 1 times [2018-09-10 12:12:12,125 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:12:12,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:12:12,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:12:12,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:12:12,126 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:12:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:12:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 455 proven. 43 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2018-09-10 12:12:12,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:12:12,668 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 12:12:12,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:12:12,676 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:12:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:12:12,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:12:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-09-10 12:12:13,558 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:12:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-09-10 12:12:14,074 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:12:14,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 4 [2018-09-10 12:12:14,075 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:12:14,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:12:14,077 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:12:14,077 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:12:14,077 INFO L87 Difference]: Start difference. First operand 42420 states and 53721 transitions. Second operand 3 states. [2018-09-10 12:12:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:12:18,477 INFO L93 Difference]: Finished difference Result 89924 states and 118552 transitions. [2018-09-10 12:12:18,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:12:18,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 646 [2018-09-10 12:12:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:12:18,753 INFO L225 Difference]: With dead ends: 89924 [2018-09-10 12:12:18,753 INFO L226 Difference]: Without dead ends: 47819 [2018-09-10 12:12:19,045 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1298 GetRequests, 1292 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:12:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47819 states. [2018-09-10 12:12:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47819 to 45870. [2018-09-10 12:12:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45870 states. [2018-09-10 12:12:20,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45870 states to 45870 states and 58426 transitions. [2018-09-10 12:12:20,206 INFO L78 Accepts]: Start accepts. Automaton has 45870 states and 58426 transitions. Word has length 646 [2018-09-10 12:12:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:12:20,207 INFO L480 AbstractCegarLoop]: Abstraction has 45870 states and 58426 transitions. [2018-09-10 12:12:20,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:12:20,207 INFO L276 IsEmpty]: Start isEmpty. Operand 45870 states and 58426 transitions. [2018-09-10 12:12:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2018-09-10 12:12:20,242 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:12:20,243 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:12:20,243 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 12:12:20,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1091366913, now seen corresponding path program 1 times [2018-09-10 12:12:20,244 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:12:20,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:12:20,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:12:20,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:12:20,245 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:12:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:12:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1213 backedges. 574 proven. 91 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2018-09-10 12:12:21,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:12:21,428 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:12:21,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:12:21,435 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:12:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:12:21,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:12:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1213 backedges. 598 proven. 2 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2018-09-10 12:12:22,090 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:12:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1213 backedges. 598 proven. 2 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2018-09-10 12:12:22,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:12:22,485 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:12:22,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:12:22,757 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:12:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:12:23,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:12:25,998 WARN L175 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 499 DAG size of output: 24 [2018-09-10 12:12:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1213 backedges. 879 proven. 2 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2018-09-10 12:12:26,409 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:12:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1213 backedges. 574 proven. 91 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2018-09-10 12:12:26,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:12:26,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 15 [2018-09-10 12:12:26,934 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:12:26,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:12:26,935 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:12:26,936 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:12:26,936 INFO L87 Difference]: Start difference. First operand 45870 states and 58426 transitions. Second operand 9 states. [2018-09-10 12:12:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:12:54,430 INFO L93 Difference]: Finished difference Result 140305 states and 225934 transitions. [2018-09-10 12:12:54,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-10 12:12:54,431 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 751 [2018-09-10 12:12:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:12:55,227 INFO L225 Difference]: With dead ends: 140305 [2018-09-10 12:12:55,227 INFO L226 Difference]: Without dead ends: 94750 [2018-09-10 12:12:56,438 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3038 GetRequests, 3008 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2018-09-10 12:12:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94750 states. [2018-09-10 12:12:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94750 to 88045. [2018-09-10 12:12:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88045 states. [2018-09-10 12:12:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88045 states to 88045 states and 115749 transitions. [2018-09-10 12:12:59,608 INFO L78 Accepts]: Start accepts. Automaton has 88045 states and 115749 transitions. Word has length 751 [2018-09-10 12:12:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:12:59,609 INFO L480 AbstractCegarLoop]: Abstraction has 88045 states and 115749 transitions. [2018-09-10 12:12:59,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:12:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 88045 states and 115749 transitions. [2018-09-10 12:12:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-09-10 12:12:59,703 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:12:59,704 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:12:59,704 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 12:12:59,704 INFO L82 PathProgramCache]: Analyzing trace with hash -949204394, now seen corresponding path program 1 times [2018-09-10 12:12:59,704 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:12:59,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:12:59,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:12:59,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:12:59,706 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:12:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:13:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 605 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:13:01,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:13:01,477 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 12:13:01,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:13:01,485 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:13:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:13:01,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:13:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 605 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:13:02,468 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:13:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 605 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:13:03,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:13:03,409 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 12:13:03,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:13:03,441 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:13:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:13:04,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:13:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 605 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:13:04,469 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:13:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 605 proven. 2 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-10 12:13:05,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:13:05,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:13:05,037 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:13:05,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:13:05,039 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:13:05,039 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:13:05,039 INFO L87 Difference]: Start difference. First operand 88045 states and 115749 transitions. Second operand 9 states. [2018-09-10 12:13:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:13:14,028 INFO L93 Difference]: Finished difference Result 168205 states and 211675 transitions. [2018-09-10 12:13:14,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:13:14,028 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 807 [2018-09-10 12:13:14,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:13:14,264 INFO L225 Difference]: With dead ends: 168205 [2018-09-10 12:13:14,265 INFO L226 Difference]: Without dead ends: 80783 [2018-09-10 12:13:14,671 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3246 GetRequests, 3226 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:13:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80783 states. [2018-09-10 12:13:16,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80783 to 79348. [2018-09-10 12:13:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79348 states. [2018-09-10 12:13:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79348 states to 79348 states and 90118 transitions. [2018-09-10 12:13:16,349 INFO L78 Accepts]: Start accepts. Automaton has 79348 states and 90118 transitions. Word has length 807 [2018-09-10 12:13:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:13:16,350 INFO L480 AbstractCegarLoop]: Abstraction has 79348 states and 90118 transitions. [2018-09-10 12:13:16,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:13:16,350 INFO L276 IsEmpty]: Start isEmpty. Operand 79348 states and 90118 transitions. [2018-09-10 12:13:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2018-09-10 12:13:16,422 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:13:16,422 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:13:16,423 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 12:13:16,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2031317064, now seen corresponding path program 1 times [2018-09-10 12:13:16,423 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:13:16,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:13:16,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:13:16,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:13:16,424 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:13:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:13:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 652 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:13:17,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:13:17,647 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 12:13:17,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:13:17,664 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:13:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:13:17,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:13:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 652 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:13:18,462 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:13:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 652 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:13:18,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:13:18,829 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 12:13:18,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:13:18,849 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:13:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:13:19,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:13:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 652 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:13:19,756 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:13:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 652 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-09-10 12:13:20,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:13:20,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 8 [2018-09-10 12:13:20,356 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:13:20,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:13:20,358 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:13:20,358 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-09-10 12:13:20,359 INFO L87 Difference]: Start difference. First operand 79348 states and 90118 transitions. Second operand 7 states. Received shutdown request... [2018-09-10 12:13:26,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-10 12:13:26,110 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:13:26,116 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:13:26,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:13:26 BoogieIcfgContainer [2018-09-10 12:13:26,117 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:13:26,117 INFO L168 Benchmark]: Toolchain (without parser) took 232957.22 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -294.7 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-09-10 12:13:26,118 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:13:26,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1335.12 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-09-10 12:13:26,120 INFO L168 Benchmark]: Boogie Procedure Inliner took 262.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-10 12:13:26,120 INFO L168 Benchmark]: Boogie Preprocessor took 670.48 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 870.8 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. [2018-09-10 12:13:26,121 INFO L168 Benchmark]: RCFGBuilder took 8983.35 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 322.9 MB). Peak memory consumption was 322.9 MB. Max. memory is 7.1 GB. [2018-09-10 12:13:26,123 INFO L168 Benchmark]: TraceAbstraction took 221699.56 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 240.7 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-09-10 12:13:26,129 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1335.12 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 262.50 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 670.48 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 870.8 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8983.35 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 322.9 MB). Peak memory consumption was 322.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221699.56 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 240.7 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 142]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 142). Cancelled while BasicCegarLoop was constructing difference of abstraction (79348states) and FLOYD_HOARE automaton (currently 9 states, 7 states before enhancement), while ReachableStatesComputation was computing reachable states (39807 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 221.6s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 163.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3908 SDtfs, 22751 SDslu, 3637 SDs, 0 SdLazy, 41461 SolverSat, 7983 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 136.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18607 GetRequests, 18409 SyntacticMatches, 33 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 22.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88045occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 10.7s AutomataMinimizationTime, 14 MinimizatonAttempts, 16508 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 35.8s InterpolantComputationTime, 15268 NumberOfCodeBlocks, 15268 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 24427 ConstructedInterpolants, 306 QuantifiedInterpolants, 36205155 SizeOfPredicates, 20 NumberOfNonLiveVariables, 12805 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 47 InterpolantComputations, 13 PerfectInterpolantSequences, 25238/26388 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label19_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-13-26-146.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label19_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-13-26-146.csv Completed graceful shutdown