java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label21_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 13:03:34,394 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 13:03:34,396 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 13:03:34,408 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 13:03:34,408 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 13:03:34,409 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 13:03:34,411 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 13:03:34,412 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 13:03:34,414 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 13:03:34,415 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 13:03:34,416 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 13:03:34,416 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 13:03:34,417 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 13:03:34,418 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 13:03:34,419 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 13:03:34,420 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 13:03:34,421 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 13:03:34,422 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 13:03:34,424 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 13:03:34,426 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 13:03:34,427 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 13:03:34,428 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 13:03:34,431 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-08-07 13:03:34,431 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-08-07 13:03:34,431 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-08-07 13:03:34,432 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-08-07 13:03:34,433 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-08-07 13:03:34,434 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-08-07 13:03:34,435 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-08-07 13:03:34,436 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-08-07 13:03:34,436 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-08-07 13:03:34,437 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-08-07 13:03:34,437 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-08-07 13:03:34,437 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-08-07 13:03:34,438 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-08-07 13:03:34,439 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-08-07 13:03:34,439 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-08-07 13:03:34,454 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 13:03:34,455 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 13:03:34,456 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 13:03:34,456 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 13:03:34,456 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 13:03:34,456 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 13:03:34,456 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 13:03:34,457 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 13:03:34,457 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 13:03:34,457 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 13:03:34,457 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 13:03:34,458 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 13:03:34,458 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 13:03:34,458 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 13:03:34,458 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 13:03:34,459 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 13:03:34,459 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 13:03:34,459 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 13:03:34,459 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 13:03:34,459 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 13:03:34,460 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 13:03:34,460 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 13:03:34,460 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 13:03:34,460 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 13:03:34,460 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 13:03:34,461 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 13:03:34,461 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 13:03:34,461 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 13:03:34,461 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 13:03:34,461 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 13:03:34,462 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 13:03:34,462 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 13:03:34,462 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 13:03:34,516 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 13:03:34,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 13:03:34,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 13:03:34,534 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 13:03:34,534 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 13:03:34,535 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label21_true-unreach-call.c [2018-08-07 13:03:34,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be11b14a1/378891b6491b4b15aba3b40272006483/FLAG220764313 [2018-08-07 13:03:35,272 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 13:03:35,273 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label21_true-unreach-call.c [2018-08-07 13:03:35,306 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be11b14a1/378891b6491b4b15aba3b40272006483/FLAG220764313 [2018-08-07 13:03:35,328 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be11b14a1/378891b6491b4b15aba3b40272006483 [2018-08-07 13:03:35,342 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 13:03:35,346 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 13:03:35,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 13:03:35,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 13:03:35,357 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 13:03:35,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 01:03:35" (1/1) ... [2018-08-07 13:03:35,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d23126d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:35, skipping insertion in model container [2018-08-07 13:03:35,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 01:03:35" (1/1) ... [2018-08-07 13:03:35,704 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 13:03:36,501 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 13:03:36,519 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 13:03:36,972 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 13:03:37,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37 WrapperNode [2018-08-07 13:03:37,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 13:03:37,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 13:03:37,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 13:03:37,217 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 13:03:37,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (1/1) ... [2018-08-07 13:03:37,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (1/1) ... [2018-08-07 13:03:37,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 13:03:37,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 13:03:37,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 13:03:37,475 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 13:03:38,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (1/1) ... [2018-08-07 13:03:38,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (1/1) ... [2018-08-07 13:03:38,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (1/1) ... [2018-08-07 13:03:38,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (1/1) ... [2018-08-07 13:03:38,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (1/1) ... [2018-08-07 13:03:38,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (1/1) ... [2018-08-07 13:03:38,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (1/1) ... [2018-08-07 13:03:38,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 13:03:38,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 13:03:38,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 13:03:38,275 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 13:03:38,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 13:03:38,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 13:03:38,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 13:03:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 13:03:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 13:03:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 13:03:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 13:03:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 13:03:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 13:03:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-08-07 13:03:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-08-07 13:03:46,881 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 13:03:46,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 01:03:46 BoogieIcfgContainer [2018-08-07 13:03:46,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 13:03:46,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 13:03:46,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 13:03:46,887 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 13:03:46,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 01:03:35" (1/3) ... [2018-08-07 13:03:46,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6803806a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 01:03:46, skipping insertion in model container [2018-08-07 13:03:46,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 01:03:37" (2/3) ... [2018-08-07 13:03:46,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6803806a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 01:03:46, skipping insertion in model container [2018-08-07 13:03:46,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 01:03:46" (3/3) ... [2018-08-07 13:03:46,891 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label21_true-unreach-call.c [2018-08-07 13:03:46,900 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 13:03:46,914 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 13:03:46,986 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 13:03:46,987 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 13:03:46,987 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 13:03:46,988 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 13:03:46,988 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 13:03:46,988 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 13:03:46,988 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 13:03:46,988 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 13:03:46,989 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 13:03:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-08-07 13:03:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-08-07 13:03:47,049 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:03:47,050 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:03:47,051 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:03:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash 810589972, now seen corresponding path program 1 times [2018-08-07 13:03:47,059 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:03:47,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:03:47,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:03:47,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:03:47,106 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:03:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:03:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:03:47,636 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:03:47,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 13:03:47,637 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:03:47,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 13:03:47,660 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 13:03:47,660 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:03:47,663 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-08-07 13:04:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:04:01,253 INFO L93 Difference]: Finished difference Result 2166 states and 4013 transitions. [2018-08-07 13:04:01,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 13:04:01,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2018-08-07 13:04:01,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:04:01,305 INFO L225 Difference]: With dead ends: 2166 [2018-08-07 13:04:01,305 INFO L226 Difference]: Without dead ends: 1556 [2018-08-07 13:04:01,318 INFO L603 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 [2018-08-07 13:04:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2018-08-07 13:04:01,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1068. [2018-08-07 13:04:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-08-07 13:04:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1850 transitions. [2018-08-07 13:04:01,475 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1850 transitions. Word has length 66 [2018-08-07 13:04:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:04:01,476 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 1850 transitions. [2018-08-07 13:04:01,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 13:04:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1850 transitions. [2018-08-07 13:04:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-08-07 13:04:01,491 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:04:01,492 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:04:01,492 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:04:01,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1867897222, now seen corresponding path program 1 times [2018-08-07 13:04:01,493 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:04:01,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:01,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:04:01,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:01,496 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:04:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:04:01,880 WARN L170 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 13:04:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:04:01,946 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:04:01,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 13:04:01,946 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:04:01,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 13:04:01,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 13:04:01,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 13:04:01,949 INFO L87 Difference]: Start difference. First operand 1068 states and 1850 transitions. Second operand 6 states. [2018-08-07 13:04:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:04:10,737 INFO L93 Difference]: Finished difference Result 3059 states and 5419 transitions. [2018-08-07 13:04:10,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 13:04:10,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2018-08-07 13:04:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:04:10,755 INFO L225 Difference]: With dead ends: 3059 [2018-08-07 13:04:10,755 INFO L226 Difference]: Without dead ends: 1997 [2018-08-07 13:04:10,760 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 13:04:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2018-08-07 13:04:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1975. [2018-08-07 13:04:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2018-08-07 13:04:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3181 transitions. [2018-08-07 13:04:10,849 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3181 transitions. Word has length 142 [2018-08-07 13:04:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:04:10,850 INFO L480 AbstractCegarLoop]: Abstraction has 1975 states and 3181 transitions. [2018-08-07 13:04:10,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 13:04:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3181 transitions. [2018-08-07 13:04:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-08-07 13:04:10,863 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:04:10,863 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:04:10,863 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:04:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash -149082318, now seen corresponding path program 1 times [2018-08-07 13:04:10,867 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:04:10,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:10,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:04:10,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:10,868 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:04:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:04:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:04:11,153 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:04:11,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 13:04:11,153 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:04:11,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 13:04:11,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 13:04:11,154 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 13:04:11,155 INFO L87 Difference]: Start difference. First operand 1975 states and 3181 transitions. Second operand 6 states. [2018-08-07 13:04:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:04:18,815 INFO L93 Difference]: Finished difference Result 4880 states and 7834 transitions. [2018-08-07 13:04:18,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 13:04:18,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2018-08-07 13:04:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:04:18,836 INFO L225 Difference]: With dead ends: 4880 [2018-08-07 13:04:18,837 INFO L226 Difference]: Without dead ends: 2911 [2018-08-07 13:04:18,846 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-08-07 13:04:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2018-08-07 13:04:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2880. [2018-08-07 13:04:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-08-07 13:04:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3936 transitions. [2018-08-07 13:04:18,930 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3936 transitions. Word has length 146 [2018-08-07 13:04:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:04:18,931 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3936 transitions. [2018-08-07 13:04:18,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 13:04:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3936 transitions. [2018-08-07 13:04:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-08-07 13:04:18,934 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:04:18,934 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 13:04:18,937 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:04:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1659749359, now seen corresponding path program 1 times [2018-08-07 13:04:18,937 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:04:18,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:18,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:04:18,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:18,939 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:04:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:04:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 13:04:19,187 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:04:19,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 13:04:19,187 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:04:19,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 13:04:19,188 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 13:04:19,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:04:19,189 INFO L87 Difference]: Start difference. First operand 2880 states and 3936 transitions. Second operand 4 states. [2018-08-07 13:04:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:04:26,081 INFO L93 Difference]: Finished difference Result 5754 states and 7882 transitions. [2018-08-07 13:04:26,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 13:04:26,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2018-08-07 13:04:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:04:26,097 INFO L225 Difference]: With dead ends: 5754 [2018-08-07 13:04:26,097 INFO L226 Difference]: Without dead ends: 2880 [2018-08-07 13:04:26,109 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:04:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2018-08-07 13:04:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2880. [2018-08-07 13:04:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-08-07 13:04:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3720 transitions. [2018-08-07 13:04:26,173 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3720 transitions. Word has length 176 [2018-08-07 13:04:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:04:26,173 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3720 transitions. [2018-08-07 13:04:26,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 13:04:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3720 transitions. [2018-08-07 13:04:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-08-07 13:04:26,178 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:04:26,178 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-08-07 13:04:26,178 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:04:26,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2079666056, now seen corresponding path program 1 times [2018-08-07 13:04:26,179 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:04:26,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:26,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:04:26,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:26,180 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:04:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:04:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-08-07 13:04:26,526 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:04:26,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 13:04:26,526 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:04:26,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 13:04:26,527 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 13:04:26,528 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:04:26,528 INFO L87 Difference]: Start difference. First operand 2880 states and 3720 transitions. Second operand 4 states. [2018-08-07 13:04:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:04:36,163 INFO L93 Difference]: Finished difference Result 11049 states and 14698 transitions. [2018-08-07 13:04:36,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 13:04:36,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 230 [2018-08-07 13:04:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:04:36,203 INFO L225 Difference]: With dead ends: 11049 [2018-08-07 13:04:36,203 INFO L226 Difference]: Without dead ends: 8175 [2018-08-07 13:04:36,217 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:04:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2018-08-07 13:04:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8171. [2018-08-07 13:04:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8171 states. [2018-08-07 13:04:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 9880 transitions. [2018-08-07 13:04:36,408 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 9880 transitions. Word has length 230 [2018-08-07 13:04:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:04:36,409 INFO L480 AbstractCegarLoop]: Abstraction has 8171 states and 9880 transitions. [2018-08-07 13:04:36,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 13:04:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 9880 transitions. [2018-08-07 13:04:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-08-07 13:04:36,416 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:04:36,417 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:04:36,417 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:04:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash 171398214, now seen corresponding path program 1 times [2018-08-07 13:04:36,418 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:04:36,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:36,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:04:36,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:36,419 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:04:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:04:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 118 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 13:04:37,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:04:37,091 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:04:37,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:04:37,101 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:04:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:04:37,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:04:37,953 WARN L170 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 6 [2018-08-07 13:04:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-08-07 13:04:38,018 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:04:38,242 WARN L170 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-08-07 13:04:38,483 WARN L170 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2018-08-07 13:04:39,232 WARN L170 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-08-07 13:04:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 118 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 13:04:39,489 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 13:04:39,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-08-07 13:04:39,489 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:04:39,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 13:04:39,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 13:04:39,491 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-08-07 13:04:39,491 INFO L87 Difference]: Start difference. First operand 8171 states and 9880 transitions. Second operand 5 states. [2018-08-07 13:04:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:04:52,784 INFO L93 Difference]: Finished difference Result 19514 states and 23428 transitions. [2018-08-07 13:04:52,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 13:04:52,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2018-08-07 13:04:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:04:52,858 INFO L225 Difference]: With dead ends: 19514 [2018-08-07 13:04:52,858 INFO L226 Difference]: Without dead ends: 11349 [2018-08-07 13:04:52,886 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-08-07 13:04:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11349 states. [2018-08-07 13:04:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11349 to 11286. [2018-08-07 13:04:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11286 states. [2018-08-07 13:04:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11286 states to 11286 states and 13305 transitions. [2018-08-07 13:04:53,166 INFO L78 Accepts]: Start accepts. Automaton has 11286 states and 13305 transitions. Word has length 253 [2018-08-07 13:04:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:04:53,166 INFO L480 AbstractCegarLoop]: Abstraction has 11286 states and 13305 transitions. [2018-08-07 13:04:53,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 13:04:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11286 states and 13305 transitions. [2018-08-07 13:04:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-08-07 13:04:53,185 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:04:53,185 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-08-07 13:04:53,186 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:04:53,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1843424975, now seen corresponding path program 1 times [2018-08-07 13:04:53,186 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:04:53,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:53,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:04:53,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:04:53,194 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:04:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:04:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-08-07 13:04:53,618 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:04:53,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 13:04:53,619 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:04:53,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 13:04:53,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 13:04:53,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:04:53,620 INFO L87 Difference]: Start difference. First operand 11286 states and 13305 transitions. Second operand 4 states. [2018-08-07 13:05:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:05:01,177 INFO L93 Difference]: Finished difference Result 29962 states and 35909 transitions. [2018-08-07 13:05:01,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 13:05:01,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 296 [2018-08-07 13:05:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:05:01,234 INFO L225 Difference]: With dead ends: 29962 [2018-08-07 13:05:01,234 INFO L226 Difference]: Without dead ends: 19119 [2018-08-07 13:05:01,278 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:05:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19119 states. [2018-08-07 13:05:01,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19119 to 19105. [2018-08-07 13:05:01,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19105 states. [2018-08-07 13:05:01,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19105 states to 19105 states and 22149 transitions. [2018-08-07 13:05:01,642 INFO L78 Accepts]: Start accepts. Automaton has 19105 states and 22149 transitions. Word has length 296 [2018-08-07 13:05:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:05:01,643 INFO L480 AbstractCegarLoop]: Abstraction has 19105 states and 22149 transitions. [2018-08-07 13:05:01,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 13:05:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 19105 states and 22149 transitions. [2018-08-07 13:05:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-08-07 13:05:01,659 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:05:01,660 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:05:01,660 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:05:01,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1377326543, now seen corresponding path program 1 times [2018-08-07 13:05:01,660 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:05:01,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:05:01,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:05:01,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:05:01,662 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:05:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:05:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 187 proven. 209 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-08-07 13:05:02,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:05:02,482 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:05:02,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:05:02,490 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:05:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:05:02,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:05:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-08-07 13:05:02,948 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:05:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 187 proven. 211 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 13:05:04,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:05:04,352 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 13:05:04,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:05:04,369 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:05:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:05:04,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:05:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-08-07 13:05:04,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:05:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 187 proven. 211 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 13:05:05,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 13:05:05,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 17 [2018-08-07 13:05:05,693 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 13:05:05,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-08-07 13:05:05,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-08-07 13:05:05,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2018-08-07 13:05:05,694 INFO L87 Difference]: Start difference. First operand 19105 states and 22149 transitions. Second operand 11 states. [2018-08-07 13:05:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:05:31,270 INFO L93 Difference]: Finished difference Result 56327 states and 69750 transitions. [2018-08-07 13:05:31,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-08-07 13:05:31,274 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 305 [2018-08-07 13:05:31,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:05:31,426 INFO L225 Difference]: With dead ends: 56327 [2018-08-07 13:05:31,426 INFO L226 Difference]: Without dead ends: 37665 [2018-08-07 13:05:31,473 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1242 GetRequests, 1215 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2018-08-07 13:05:31,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37665 states. [2018-08-07 13:05:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37665 to 35847. [2018-08-07 13:05:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35847 states. [2018-08-07 13:05:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35847 states to 35847 states and 43249 transitions. [2018-08-07 13:05:32,266 INFO L78 Accepts]: Start accepts. Automaton has 35847 states and 43249 transitions. Word has length 305 [2018-08-07 13:05:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:05:32,268 INFO L480 AbstractCegarLoop]: Abstraction has 35847 states and 43249 transitions. [2018-08-07 13:05:32,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-08-07 13:05:32,268 INFO L276 IsEmpty]: Start isEmpty. Operand 35847 states and 43249 transitions. [2018-08-07 13:05:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-08-07 13:05:32,285 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:05:32,286 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:05:32,286 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:05:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1060677227, now seen corresponding path program 1 times [2018-08-07 13:05:32,287 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:05:32,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:05:32,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:05:32,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:05:32,288 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:05:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:05:32,750 WARN L170 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-08-07 13:05:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-08-07 13:05:32,831 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:05:32,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 13:05:32,831 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:05:32,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 13:05:32,832 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 13:05:32,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:05:32,833 INFO L87 Difference]: Start difference. First operand 35847 states and 43249 transitions. Second operand 4 states. [2018-08-07 13:05:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:05:42,940 INFO L93 Difference]: Finished difference Result 90574 states and 111856 transitions. [2018-08-07 13:05:42,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 13:05:42,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2018-08-07 13:05:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:05:43,152 INFO L225 Difference]: With dead ends: 90574 [2018-08-07 13:05:43,152 INFO L226 Difference]: Without dead ends: 55170 [2018-08-07 13:05:43,248 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 13:05:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55170 states. [2018-08-07 13:05:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55170 to 49436. [2018-08-07 13:05:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49436 states. [2018-08-07 13:05:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49436 states to 49436 states and 59065 transitions. [2018-08-07 13:05:44,312 INFO L78 Accepts]: Start accepts. Automaton has 49436 states and 59065 transitions. Word has length 328 [2018-08-07 13:05:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:05:44,314 INFO L480 AbstractCegarLoop]: Abstraction has 49436 states and 59065 transitions. [2018-08-07 13:05:44,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 13:05:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 49436 states and 59065 transitions. [2018-08-07 13:05:44,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-08-07 13:05:44,346 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:05:44,346 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:05:44,347 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:05:44,347 INFO L82 PathProgramCache]: Analyzing trace with hash 188289875, now seen corresponding path program 1 times [2018-08-07 13:05:44,347 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:05:44,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:05:44,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:05:44,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:05:44,348 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:05:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:05:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 250 proven. 227 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-08-07 13:05:44,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:05:44,951 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:05:44,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:05:44,959 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:05:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:05:45,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:05:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 490 proven. 2 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2018-08-07 13:05:45,378 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:05:45,891 WARN L170 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-08-07 13:05:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 319 proven. 147 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-08-07 13:05:46,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:05:46,566 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 13:05:46,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:05:46,582 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:05:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:05:46,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:05:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2018-08-07 13:05:47,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:05:48,005 WARN L170 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-08-07 13:05:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 249 proven. 281 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-08-07 13:05:48,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 13:05:48,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 5, 5] total 18 [2018-08-07 13:05:48,568 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 13:05:48,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-08-07 13:05:48,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-08-07 13:05:48,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2018-08-07 13:05:48,570 INFO L87 Difference]: Start difference. First operand 49436 states and 59065 transitions. Second operand 12 states. [2018-08-07 13:06:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:06:10,127 INFO L93 Difference]: Finished difference Result 90201 states and 108708 transitions. [2018-08-07 13:06:10,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-08-07 13:06:10,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 402 [2018-08-07 13:06:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:06:10,200 INFO L225 Difference]: With dead ends: 90201 [2018-08-07 13:06:10,200 INFO L226 Difference]: Without dead ends: 27455 [2018-08-07 13:06:10,309 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1678 GetRequests, 1629 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=461, Invalid=1891, Unknown=0, NotChecked=0, Total=2352 [2018-08-07 13:06:10,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27455 states. [2018-08-07 13:06:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27455 to 20724. [2018-08-07 13:06:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20724 states. [2018-08-07 13:06:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20724 states to 20724 states and 23867 transitions. [2018-08-07 13:06:10,722 INFO L78 Accepts]: Start accepts. Automaton has 20724 states and 23867 transitions. Word has length 402 [2018-08-07 13:06:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:06:10,723 INFO L480 AbstractCegarLoop]: Abstraction has 20724 states and 23867 transitions. [2018-08-07 13:06:10,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-08-07 13:06:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 20724 states and 23867 transitions. [2018-08-07 13:06:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2018-08-07 13:06:10,744 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:06:10,745 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-08-07 13:06:10,745 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:06:10,745 INFO L82 PathProgramCache]: Analyzing trace with hash 448344609, now seen corresponding path program 1 times [2018-08-07 13:06:10,746 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:06:10,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:06:10,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:06:10,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:06:10,747 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:06:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:06:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2018-08-07 13:06:11,416 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 13:06:11,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 13:06:11,416 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:06:11,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 13:06:11,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 13:06:11,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 13:06:11,417 INFO L87 Difference]: Start difference. First operand 20724 states and 23867 transitions. Second operand 3 states. [2018-08-07 13:06:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:06:15,943 INFO L93 Difference]: Finished difference Result 56108 states and 65297 transitions. [2018-08-07 13:06:15,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 13:06:15,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 461 [2018-08-07 13:06:15,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:06:16,007 INFO L225 Difference]: With dead ends: 56108 [2018-08-07 13:06:16,008 INFO L226 Difference]: Without dead ends: 34933 [2018-08-07 13:06:16,037 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 13:06:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34933 states. [2018-08-07 13:06:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34933 to 34060. [2018-08-07 13:06:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34060 states. [2018-08-07 13:06:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34060 states to 34060 states and 38797 transitions. [2018-08-07 13:06:16,568 INFO L78 Accepts]: Start accepts. Automaton has 34060 states and 38797 transitions. Word has length 461 [2018-08-07 13:06:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:06:16,569 INFO L480 AbstractCegarLoop]: Abstraction has 34060 states and 38797 transitions. [2018-08-07 13:06:16,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 13:06:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 34060 states and 38797 transitions. [2018-08-07 13:06:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-08-07 13:06:16,591 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:06:16,592 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:06:16,592 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:06:16,592 INFO L82 PathProgramCache]: Analyzing trace with hash -897008104, now seen corresponding path program 1 times [2018-08-07 13:06:16,593 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:06:16,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:06:16,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:06:16,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:06:16,594 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:06:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:06:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 491 proven. 147 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2018-08-07 13:06:17,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:06:17,435 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:06:17,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:06:17,454 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:06:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:06:17,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:06:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2018-08-07 13:06:18,029 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:06:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2018-08-07 13:06:19,106 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 13:06:19,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-08-07 13:06:19,107 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:06:19,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 13:06:19,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 13:06:19,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-08-07 13:06:19,109 INFO L87 Difference]: Start difference. First operand 34060 states and 38797 transitions. Second operand 3 states. [2018-08-07 13:06:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:06:34,551 INFO L93 Difference]: Finished difference Result 79320 states and 91112 transitions. [2018-08-07 13:06:34,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 13:06:34,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2018-08-07 13:06:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:06:34,655 INFO L225 Difference]: With dead ends: 79320 [2018-08-07 13:06:34,655 INFO L226 Difference]: Without dead ends: 41890 [2018-08-07 13:06:34,714 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 988 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-08-07 13:06:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41890 states. [2018-08-07 13:06:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41890 to 40145. [2018-08-07 13:06:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40145 states. [2018-08-07 13:06:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40145 states to 40145 states and 45460 transitions. [2018-08-07 13:06:35,361 INFO L78 Accepts]: Start accepts. Automaton has 40145 states and 45460 transitions. Word has length 495 [2018-08-07 13:06:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:06:35,362 INFO L480 AbstractCegarLoop]: Abstraction has 40145 states and 45460 transitions. [2018-08-07 13:06:35,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 13:06:35,363 INFO L276 IsEmpty]: Start isEmpty. Operand 40145 states and 45460 transitions. [2018-08-07 13:06:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2018-08-07 13:06:35,434 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:06:35,435 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, 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, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:06:35,435 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:06:35,436 INFO L82 PathProgramCache]: Analyzing trace with hash -456331337, now seen corresponding path program 1 times [2018-08-07 13:06:35,436 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:06:35,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:06:35,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:06:35,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:06:35,437 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:06:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:06:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 252 proven. 2 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2018-08-07 13:06:35,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:06:35,943 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:06:35,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:06:35,956 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:06:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:06:36,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:06:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 506 proven. 0 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-08-07 13:06:36,658 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:06:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 252 proven. 2 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2018-08-07 13:06:37,130 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 13:06:37,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-08-07 13:06:37,130 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:06:37,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 13:06:37,131 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 13:06:37,131 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 13:06:37,132 INFO L87 Difference]: Start difference. First operand 40145 states and 45460 transitions. Second operand 3 states. [2018-08-07 13:06:41,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:06:41,048 INFO L93 Difference]: Finished difference Result 85069 states and 97026 transitions. [2018-08-07 13:06:41,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 13:06:41,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 672 [2018-08-07 13:06:41,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:06:41,140 INFO L225 Difference]: With dead ends: 85069 [2018-08-07 13:06:41,141 INFO L226 Difference]: Without dead ends: 42376 [2018-08-07 13:06:41,188 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1346 GetRequests, 1345 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 13:06:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2018-08-07 13:06:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 39763. [2018-08-07 13:06:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39763 states. [2018-08-07 13:06:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39763 states to 39763 states and 44860 transitions. [2018-08-07 13:06:41,776 INFO L78 Accepts]: Start accepts. Automaton has 39763 states and 44860 transitions. Word has length 672 [2018-08-07 13:06:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:06:41,777 INFO L480 AbstractCegarLoop]: Abstraction has 39763 states and 44860 transitions. [2018-08-07 13:06:41,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 13:06:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 39763 states and 44860 transitions. [2018-08-07 13:06:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2018-08-07 13:06:41,835 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:06:41,836 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:06:41,837 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 13:06:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1322770688, now seen corresponding path program 1 times [2018-08-07 13:06:41,837 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:06:41,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:06:41,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:06:41,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:06:41,839 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:06:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:06:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1363 backedges. 321 proven. 4 refuted. 0 times theorem prover too weak. 1038 trivial. 0 not checked. [2018-08-07 13:06:42,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:06:42,965 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:06:42,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:06:42,973 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:06:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:06:43,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:06:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1363 backedges. 1010 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2018-08-07 13:06:43,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:06:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1363 backedges. 327 proven. 12 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2018-08-07 13:06:44,271 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 13:06:44,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2018-08-07 13:06:44,272 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 13:06:44,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 13:06:44,273 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 13:06:44,273 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 13:06:44,274 INFO L87 Difference]: Start difference. First operand 39763 states and 44860 transitions. Second operand 3 states. [2018-08-07 13:06:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 13:06:46,022 INFO L93 Difference]: Finished difference Result 78172 states and 88208 transitions. [2018-08-07 13:06:46,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 13:06:46,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 871 [2018-08-07 13:06:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 13:06:46,104 INFO L225 Difference]: With dead ends: 78172 [2018-08-07 13:06:46,104 INFO L226 Difference]: Without dead ends: 38856 [2018-08-07 13:06:46,144 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1745 GetRequests, 1737 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 13:06:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38856 states. [2018-08-07 13:06:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38856 to 37986. [2018-08-07 13:06:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37986 states. [2018-08-07 13:06:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37986 states to 37986 states and 42756 transitions. [2018-08-07 13:06:46,599 INFO L78 Accepts]: Start accepts. Automaton has 37986 states and 42756 transitions. Word has length 871 [2018-08-07 13:06:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 13:06:46,600 INFO L480 AbstractCegarLoop]: Abstraction has 37986 states and 42756 transitions. [2018-08-07 13:06:46,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 13:06:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37986 states and 42756 transitions. [2018-08-07 13:06:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-08-07 13:06:46,648 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 13:06:46,648 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 13:06:46,649 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]=== [2018-08-07 13:06:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash -620813094, now seen corresponding path program 1 times [2018-08-07 13:06:46,649 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 13:06:46,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:06:46,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:06:46,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 13:06:46,650 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 13:06:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:06:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 491 proven. 202 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2018-08-07 13:06:48,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:06:48,052 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 13:06:48,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:06:48,061 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:06:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:06:48,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:06:48,755 WARN L170 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 11 [2018-08-07 13:06:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 736 proven. 57 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-08-07 13:06:49,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:06:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 791 proven. 2 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2018-08-07 13:06:51,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 13:06:51,327 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 13:06:51,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 13:06:51,343 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 13:06:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 13:06:52,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 13:06:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 654 proven. 371 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2018-08-07 13:06:54,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 13:06:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 858 proven. 210 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-08-07 13:06:56,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 13:06:56,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 10, 9] total 29 [2018-08-07 13:06:56,509 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 13:06:56,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 13:06:56,512 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 13:06:56,512 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2018-08-07 13:06:56,512 INFO L87 Difference]: Start difference. First operand 37986 states and 42756 transitions. Second operand 10 states. [2018-08-07 13:07:02,338 WARN L170 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-08-07 13:07:18,577 WARN L170 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-08-07 13:07:21,174 WARN L170 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 14 Received shutdown request... [2018-08-07 13:07:33,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-08-07 13:07:33,395 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 13:07:33,400 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 13:07:33,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 01:07:33 BoogieIcfgContainer [2018-08-07 13:07:33,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 13:07:33,402 INFO L168 Benchmark]: Toolchain (without parser) took 238059.38 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -564.4 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-08-07 13:07:33,403 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-08-07 13:07:33,403 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1869.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. [2018-08-07 13:07:33,404 INFO L168 Benchmark]: Boogie Procedure Inliner took 258.09 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-08-07 13:07:33,405 INFO L168 Benchmark]: Boogie Preprocessor took 799.38 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 943.2 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. [2018-08-07 13:07:33,406 INFO L168 Benchmark]: RCFGBuilder took 8607.52 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 504.4 MB). Peak memory consumption was 504.4 MB. Max. memory is 7.1 GB. [2018-08-07 13:07:33,406 INFO L168 Benchmark]: TraceAbstraction took 226517.76 ms. Allocated memory was 2.5 GB in the beginning and 4.1 GB in the end (delta: 1.6 GB). Free memory was 1.9 GB in the beginning and 2.0 GB in the end (delta: -133.8 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-08-07 13:07:33,411 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 1869.01 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 179.7 MB). Peak memory consumption was 179.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 258.09 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 799.38 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 943.2 MB). Free memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 123.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8607.52 ms. Allocated memory is still 2.5 GB. Free memory was 2.4 GB in the beginning and 1.9 GB in the end (delta: 504.4 MB). Peak memory consumption was 504.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 226517.76 ms. Allocated memory was 2.5 GB in the beginning and 4.1 GB in the end (delta: 1.6 GB). Free memory was 1.9 GB in the beginning and 2.0 GB in the end (delta: -133.8 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 185]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 185). Cancelled while BasicCegarLoop was constructing difference of abstraction (37986states) and FLOYD_HOARE automaton (currently 25 states, 10 states before enhancement), while ReachableStatesComputation was computing reachable states (9338 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 226.4s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 188.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6609 SDtfs, 28356 SDslu, 3816 SDs, 0 SdLazy, 47496 SolverSat, 10634 SolverUnsat, 37 SolverUnknown, 0 SolverNotchecked, 167.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11222 GetRequests, 11040 SyntacticMatches, 19 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 13.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49436occurred in iteration=9, 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: 5.6s AutomataMinimizationTime, 14 MinimizatonAttempts, 21006 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 24.7s InterpolantComputationTime, 11257 NumberOfCodeBlocks, 11257 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 16733 ConstructedInterpolants, 385 QuantifiedInterpolants, 27909239 SizeOfPredicates, 27 NumberOfNonLiveVariables, 8310 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 35 InterpolantComputations, 13 PerfectInterpolantSequences, 21667/24114 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_13-07-33-429.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem17_label21_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_13-07-33-429.csv Completed graceful shutdown